- Fix off-by-one error in retrieving the context buffer for trace_printk()
- Fix off-by-one error in stack nesting limit
- Fix recursion to not make all NMI code false positive as recursing
- Stop losing events in function tracing when transitioning between irq context
- Stop losing events in ring buffer when transitioning between irq context
- Fix return code of error pointer in parse_synth_field() to prevent
NULL pointer dereference.
- Fix false positive of NMI recursion in kprobe event handling
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCX6QqmRQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qtWiAQCKf3xblmQDcge2BLQPy2H7ih5VCSSb
vDPrQKgLa35pSgEAhGj7mgAKxb6kDbae1BqPorfa/qn9Bi13XfRNTxBK2Qw=
=zKfd
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
- Fix off-by-one error in retrieving the context buffer for
trace_printk()
- Fix off-by-one error in stack nesting limit
- Fix recursion to not make all NMI code false positive as recursing
- Stop losing events in function tracing when transitioning between irq
context
- Stop losing events in ring buffer when transitioning between irq
context
- Fix return code of error pointer in parse_synth_field() to prevent
NULL pointer dereference.
- Fix false positive of NMI recursion in kprobe event handling
* tag 'trace-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
kprobes: Tell lockdep about kprobe nesting
tracing: Make -ENOMEM the default error for parse_synth_field()
ring-buffer: Fix recursion protection transitions between interrupt context
tracing: Fix the checking of stackidx in __ftrace_trace_stack
ftrace: Handle tracing when switching between context
ftrace: Fix recursion check for NMI test
tracing: Fix out of bounds write in get_trace_buf
- Unify the handling of managed and stateless device links in the
runtime PM framework and prevent runtime PM references to devices
from being leaked after device link removal (Rafael Wysocki).
- Fix two mistakes in the cpuidle documentation (Julia Lawall).
- Prevent the schedutil cpufreq governor from missing policy
limits updates in some cases (Viresh Kumar).
- Prevent static OPPs from being dropped by mistake (Viresh Kumar).
- Prevent helper function in the OPP framework from returning
prematurely (Viresh Kumar).
- Prevent opp_table_lock from being held too long during removal
of OPP tables with no more active references (Viresh Kumar).
- Drop redundant semicolon from the Intel RAPL power capping
driver (Tom Rix).
-----BEGIN PGP SIGNATURE-----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=lKQA
-----END PGP SIGNATURE-----
Merge tag 'pm-5.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix the device links support in runtime PM, correct mistakes in
the cpuidle documentation, fix the handling of policy limits changes
in the schedutil cpufreq governor, fix assorted issues in the OPP
(operating performance points) framework and make one janitorial
change.
Specifics:
- Unify the handling of managed and stateless device links in the
runtime PM framework and prevent runtime PM references to devices
from being leaked after device link removal (Rafael Wysocki).
- Fix two mistakes in the cpuidle documentation (Julia Lawall).
- Prevent the schedutil cpufreq governor from missing policy limits
updates in some cases (Viresh Kumar).
- Prevent static OPPs from being dropped by mistake (Viresh Kumar).
- Prevent helper function in the OPP framework from returning
prematurely (Viresh Kumar).
- Prevent opp_table_lock from being held too long during removal of
OPP tables with no more active references (Viresh Kumar).
- Drop redundant semicolon from the Intel RAPL power capping driver
(Tom Rix)"
* tag 'pm-5.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
PM: runtime: Resume the device earlier in __device_release_driver()
PM: runtime: Drop pm_runtime_clean_up_links()
PM: runtime: Drop runtime PM references to supplier on link removal
powercap/intel_rapl: remove unneeded semicolon
Documentation: PM: cpuidle: correct path name
Documentation: PM: cpuidle: correct typo
cpufreq: schedutil: Don't skip freq update if need_freq_update is set
opp: Reduce the size of critical section in _opp_table_kref_release()
opp: Fix early exit from dev_pm_opp_register_set_opp_helper()
opp: Don't always remove static OPPs in _of_add_opp_table_v1()
Since the kprobe handlers have protection that prohibits other handlers from
executing in other contexts (like if an NMI comes in while processing a
kprobe, and executes the same kprobe, it will get fail with a "busy"
return). Lockdep is unaware of this protection. Use lockdep's nesting api to
differentiate between locks taken in INT3 context and other context to
suppress the false warnings.
Link: https://lore.kernel.org/r/20201102160234.fa0ae70915ad9e2b21c08b85@kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
kcov_common_handle is a method that is used to obtain a "default" KCOV
remote handle of the current process. The handle can later be passed
to kcov_remote_start in order to collect coverage for the processing
that is initiated by one process, but done in another. For details see
Documentation/dev-tools/kcov.rst and comments in kernel/kcov.c.
Presently, if kcov_common_handle is called in an IRQ context, it will
return a handle for the interrupted process. This may lead to
unreliable and incorrect coverage collection.
Adjust the behavior of kcov_common_handle in the following way. If it
is called in a task context, return the common handle for the
currently running task. Otherwise, return 0.
Signed-off-by: Aleksandr Nogikh <nogikh@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
parse_synth_field() returns a pointer and requires that errors get
surrounded by ERR_PTR(). The ret variable is initialized to zero, but should
never be used as zero, and if it is, it could cause a false return code and
produce a NULL pointer dereference. It makes no sense to set ret to zero.
Set ret to -ENOMEM (the most common error case), and have any other errors
set it to something else. This removes the need to initialize ret on *every*
error branch.
Fixes: 761a8c58db ("tracing, synthetic events: Replace buggy strcat() with seq_buf operations")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
The recursion protection of the ring buffer depends on preempt_count() to be
correct. But it is possible that the ring buffer gets called after an
interrupt comes in but before it updates the preempt_count(). This will
trigger a false positive in the recursion code.
Use the same trick from the ftrace function callback recursion code which
uses a "transition" bit that gets set, to allow for a single recursion for
to handle transitions between contexts.
Cc: stable@vger.kernel.org
Fixes: 567cd4da54 ("ring-buffer: User context bit recursion checking")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Commit 32927393dc ("sysctl: pass kernel pointers to ->proc_handler")
removed various __user annotations from function signatures as part of
its refactoring.
It also removed the __user annotation for proc_dohung_task_timeout_secs()
at its declaration in sched/sysctl.h, but not at its definition in
kernel/hung_task.c.
Hence, sparse complains:
kernel/hung_task.c:271:5: error: symbol 'proc_dohung_task_timeout_secs' redeclared with different type (incompatible argument 3 (different address spaces))
Adjust the annotation at the definition fitting to that refactoring to make
sparse happy again, which also resolves this warning from sparse:
kernel/hung_task.c:277:52: warning: incorrect type in argument 3 (different address spaces)
kernel/hung_task.c:277:52: expected void *
kernel/hung_task.c:277:52: got void [noderef] __user *buffer
No functional change. No change in object code.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrey Ignatov <rdna@fb.com>
Link: https://lkml.kernel.org/r/20201028130541.20320-1-lukas.bulwahn@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
There is a small race window when a delayed work is being canceled and
the work still might be queued from the timer_fn:
CPU0 CPU1
kthread_cancel_delayed_work_sync()
__kthread_cancel_work_sync()
__kthread_cancel_work()
work->canceling++;
kthread_delayed_work_timer_fn()
kthread_insert_work();
BUG: kthread_insert_work() should not get called when work->canceling is
set.
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201014083030.16895-1-qiang.zhang@windriver.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This testcase
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <pthread.h>
#include <assert.h>
void *tf(void *arg)
{
return NULL;
}
int main(void)
{
int pid = fork();
if (!pid) {
kill(getpid(), SIGSTOP);
pthread_t th;
pthread_create(&th, NULL, tf, NULL);
return 0;
}
waitpid(pid, NULL, WSTOPPED);
ptrace(PTRACE_SEIZE, pid, 0, PTRACE_O_TRACECLONE);
waitpid(pid, NULL, 0);
ptrace(PTRACE_CONT, pid, 0,0);
waitpid(pid, NULL, 0);
int status;
int thread = waitpid(-1, &status, 0);
assert(thread > 0 && thread != pid);
assert(status == 0x80137f);
return 0;
}
fails and triggers WARN_ON_ONCE(!signr) in do_jobctl_trap().
This is because task_join_group_stop() has 2 problems when current is traced:
1. We can't rely on the "JOBCTL_STOP_PENDING" check, a stopped tracee
can be woken up by debugger and it can clone another thread which
should join the group-stop.
We need to check group_stop_count || SIGNAL_STOP_STOPPED.
2. If SIGNAL_STOP_STOPPED is already set, we should not increment
sig->group_stop_count and add JOBCTL_STOP_CONSUME. The new thread
should stop without another do_notify_parent_cldstop() report.
To clarify, the problem is very old and we should blame
ptrace_init_task(). But now that we have task_join_group_stop() it makes
more sense to fix this helper to avoid the code duplication.
Reported-by: syzbot+3485e3773f7da290eecc@syzkaller.appspotmail.com
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christian Brauner <christian@brauner.io>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20201019134237.GA18810@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The cpufreq policy's frequency limits (min/max) can get changed at any
point of time, while schedutil is trying to update the next frequency.
Though the schedutil governor has necessary locking and support in place
to make sure we don't miss any of those updates, there is a corner case
where the governor will find that the CPU is already running at the
desired frequency and so may skip an update.
For example, consider that the CPU can run at 1 GHz, 1.2 GHz and 1.4 GHz
and is running at 1 GHz currently. Schedutil tries to update the
frequency to 1.2 GHz, during this time the policy limits get changed as
policy->min = 1.4 GHz. As schedutil (and cpufreq core) does clamp the
frequency at various instances, we will eventually set the frequency to
1.4 GHz, while we will save 1.2 GHz in sg_policy->next_freq.
Now lets say the policy limits get changed back at this time with
policy->min as 1 GHz. The next time schedutil is invoked by the
scheduler, we will reevaluate the next frequency (because
need_freq_update will get set due to limits change event) and lets say
we want to set the frequency to 1.2 GHz again. At this point
sugov_update_next_freq() will find the next_freq == current_freq and
will abort the update, while the CPU actually runs at 1.4 GHz.
Until now need_freq_update was used as a flag to indicate that the
policy's frequency limits have changed, and that we should consider the
new limits while reevaluating the next frequency.
This patch fixes the above mentioned issue by extending the purpose of
the need_freq_update flag. If this flag is set now, the schedutil
governor will not try to abort a frequency change even if next_freq ==
current_freq.
As similar behavior is required in the case of
CPUFREQ_NEED_UPDATE_LIMITS flag as well, need_freq_update will never be
set to false if that flag is set for the driver.
We also don't need to consider the need_freq_update flag in
sugov_update_single() anymore to handle the special case of busy CPU, as
we won't abort a frequency update anymore.
Reported-by: zhuguangqing <zhuguangqing@xiaomi.com>
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Rearrange code to avoid a branch ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The array size is FTRACE_KSTACK_NESTING, so the index FTRACE_KSTACK_NESTING
is illegal too. And fix two typos by the way.
Link: https://lkml.kernel.org/r/20201031085714.2147-1-hqjagain@gmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
When an interrupt or NMI comes in and switches the context, there's a delay
from when the preempt_count() shows the update. As the preempt_count() is
used to detect recursion having each context have its own bit get set when
tracing starts, and if that bit is already set, it is considered a recursion
and the function exits. But if this happens in that section where context
has changed but preempt_count() has not been updated, this will be
incorrectly flagged as a recursion.
To handle this case, create another bit call TRANSITION and test it if the
current context bit is already set. Flag the call as a recursion if the
TRANSITION bit is already set, and if not, set it and continue. The
TRANSITION bit will be cleared normally on the return of the function that
set it, or if the current context bit is clear, set it and clear the
TRANSITION bit to allow for another transition between the current context
and an even higher one.
Cc: stable@vger.kernel.org
Fixes: edc15cafcb ("tracing: Avoid unnecessary multiple recursion checks")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
The code that checks recursion will work to only do the recursion check once
if there's nested checks. The top one will do the check, the other nested
checks will see recursion was already checked and return zero for its "bit".
On the return side, nothing will be done if the "bit" is zero.
The problem is that zero is returned for the "good" bit when in NMI context.
This will set the bit for NMIs making it look like *all* NMI tracing is
recursing, and prevent tracing of anything in NMI context!
The simple fix is to return "bit + 1" and subtract that bit on the end to
get the real bit.
Cc: stable@vger.kernel.org
Fixes: edc15cafcb ("tracing: Avoid unnecessary multiple recursion checks")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
The nesting count of trace_printk allows for 4 levels of nesting. The
nesting counter starts at zero and is incremented before being used to
retrieve the current context's buffer. But the index to the buffer uses the
nesting counter after it was incremented, and not its original number,
which in needs to do.
Link: https://lkml.kernel.org/r/20201029161905.4269-1-hqjagain@gmail.com
Cc: stable@vger.kernel.org
Fixes: 3d9622c12c ("tracing: Add barrier to trace_printk() buffer nesting modification")
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
- Prevent undefined behaviour in the timespec64_to_ns() conversion which
is used for converting user supplied time input to nanoseconds. It
lacked overflow protection.
- Mark sched_clock_read_begin/retry() to prevent recursion in the tracer
- Remove unused debug functions in the hrtimer and timerlist code
-----BEGIN PGP SIGNATURE-----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=Gdoq
-----END PGP SIGNATURE-----
Merge tag 'timers-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"A few fixes for timers/timekeeping:
- Prevent undefined behaviour in the timespec64_to_ns() conversion
which is used for converting user supplied time input to
nanoseconds. It lacked overflow protection.
- Mark sched_clock_read_begin/retry() to prevent recursion in the
tracer
- Remove unused debug functions in the hrtimer and timerlist code"
* tag 'timers-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: Prevent undefined behaviour in timespec64_to_ns()
timers: Remove unused inline funtion debug_timer_free()
hrtimer: Remove unused inline function debug_hrtimer_free()
time/sched_clock: Mark sched_clock_read_begin/retry() as notrace
caused by recursion when enabling or disabling a tracer on RISC-V (probably
all architectures which patch through stop machine).
-----BEGIN PGP SIGNATURE-----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=38RZ
-----END PGP SIGNATURE-----
Merge tag 'smp-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull smp fix from Thomas Gleixner:
"A single fix for stop machine.
Mark functions no trace to prevent a crash caused by recursion when
enabling or disabling a tracer on RISC-V (probably all architectures
which patch through stop machine)"
* tag 'smp-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
stop_machine, rcu: Mark functions as notrace
- Fix incorrect failure injection handling on the fuxtex code
- Prevent a preemption warning in lockdep when tracking local_irq_enable()
and interrupts are already enabled
- Remove more raw_cpu_read() usage from lockdep which causes state
corruption on !X86 architectures.
- Make the nr_unused_locks accounting in lockdep correct again.
-----BEGIN PGP SIGNATURE-----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=S01o
-----END PGP SIGNATURE-----
Merge tag 'locking-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking fixes from Thomas Gleixner:
"A couple of locking fixes:
- Fix incorrect failure injection handling in the fuxtex code
- Prevent a preemption warning in lockdep when tracking
local_irq_enable() and interrupts are already enabled
- Remove more raw_cpu_read() usage from lockdep which causes state
corruption on !X86 architectures.
- Make the nr_unused_locks accounting in lockdep correct again"
* tag 'locking-urgent-2020-11-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lockdep: Fix nr_unused_locks accounting
locking/lockdep: Remove more raw_cpu_read() usage
futex: Fix incorrect should_fail_futex() handling
lockdep: Fix preemption WARN for spurious IRQ-enable
Hi Linus,
Please, pull the following patches that replace zero-length arrays with
flexible-array members.
Thanks
--
Gustavo
-----BEGIN PGP SIGNATURE-----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=vyu3
-----END PGP SIGNATURE-----
Merge tag 'flexible-array-conversions-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux
Pull more flexible-array member conversions from Gustavo A. R. Silva:
"Replace zero-length arrays with flexible-array members"
* tag 'flexible-array-conversions-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
printk: ringbuffer: Replace zero-length array with flexible-array member
net/smc: Replace zero-length array with flexible-array member
net/mlx5: Replace zero-length array with flexible-array member
mei: hw: Replace zero-length array with flexible-array member
gve: Replace zero-length array with flexible-array member
Bluetooth: btintel: Replace zero-length array with flexible-array member
scsi: target: tcmu: Replace zero-length array with flexible-array member
ima: Replace zero-length array with flexible-array member
enetc: Replace zero-length array with flexible-array member
fs: Replace zero-length array with flexible-array member
Bluetooth: Replace zero-length array with flexible-array member
params: Replace zero-length array with flexible-array member
tracepoint: Replace zero-length array with flexible-array member
platform/chrome: cros_ec_proto: Replace zero-length array with flexible-array member
platform/chrome: cros_ec_commands: Replace zero-length array with flexible-array member
mailbox: zynqmp-ipi-message: Replace zero-length array with flexible-array member
dmaengine: ti-cppi5: Replace zero-length array with flexible-array member
- Modify Kconfig to prevent configuring either the "conservative"
or the "ondemand" governor as the default cpufreq governor if
intel_pstate is selected, in which case "schedutil" is the
default choice for the default governor setting (Rafael Wysocki).
- Modify the cpufreq core, intel_pstate and the schedutil governor
to avoid missing updates of the HWP max limit when intel_pstate
operates in the passive mode with HWP enabled (Rafael Wysocki).
- Fix max_cstate module parameter handling in intel_idle for
processor models with C-state tables coming from ACPI (Chen Yu).
- Clean up assorted pieces of power management code (Jackie Zamow,
Tom Rix, Zhang Qilong).
-----BEGIN PGP SIGNATURE-----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=w+LI
-----END PGP SIGNATURE-----
Merge tag 'pm-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix a few issues related to running intel_pstate in the passive
mode with HWP enabled, correct the handling of the max_cstate module
parameter in intel_idle and make a few janitorial changes.
Specifics:
- Modify Kconfig to prevent configuring either the "conservative" or
the "ondemand" governor as the default cpufreq governor if
intel_pstate is selected, in which case "schedutil" is the default
choice for the default governor setting (Rafael Wysocki).
- Modify the cpufreq core, intel_pstate and the schedutil governor to
avoid missing updates of the HWP max limit when intel_pstate
operates in the passive mode with HWP enabled (Rafael Wysocki).
- Fix max_cstate module parameter handling in intel_idle for
processor models with C-state tables coming from ACPI (Chen Yu).
- Clean up assorted pieces of power management code (Jackie Zamow,
Tom Rix, Zhang Qilong)"
* tag 'pm-5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: schedutil: Always call driver if CPUFREQ_NEED_UPDATE_LIMITS is set
cpufreq: Introduce cpufreq_driver_test_flags()
cpufreq: speedstep: remove unneeded semicolon
PM: sleep: fix typo in kernel/power/process.c
intel_idle: Fix max_cstate for processor models without C-state tables
cpufreq: intel_pstate: Avoid missing HWP max updates in passive mode
cpufreq: Introduce CPUFREQ_NEED_UPDATE_LIMITS driver flag
cpufreq: Avoid configuring old governors as default with intel_pstate
cpufreq: e_powersaver: remove unreachable break
Chris reported that commit 24d5a3bffef1 ("lockdep: Fix
usage_traceoverflow") breaks the nr_unused_locks validation code
triggered by /proc/lockdep_stats.
By fully splitting LOCK_USED and LOCK_USED_READ it becomes a bad
indicator for accounting nr_unused_locks; simplyfy by using any first
bit.
Fixes: 24d5a3bffef1 ("lockdep: Fix usage_traceoverflow")
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://lkml.kernel.org/r/20201027124834.GL2628@hirez.programming.kicks-ass.net
I initially thought raw_cpu_read() was OK, since if it is !0 we have
IRQs disabled and can't get migrated, so if we get migrated both CPUs
must have 0 and it doesn't matter which 0 we read.
And while that is true; it isn't the whole store, on pretty much all
architectures (except x86) this can result in computing the address for
one CPU, getting migrated, the old CPU continuing execution with another
task (possibly setting recursion) and then the new CPU reading the value
of the old CPU, which is no longer 0.
Similer to:
baffd723e4 ("lockdep: Revert "lockdep: Use raw_cpu_*() for per-cpu variables"")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201026152256.GB2651@hirez.programming.kicks-ass.net
Because sugov_update_next_freq() may skip a frequency update even if
the need_freq_update flag has been set for the policy at hand, policy
limits updates may not take effect as expected.
For example, if the intel_pstate driver operates in the passive mode
with HWP enabled, it needs to update the HWP min and max limits when
the policy min and max limits change, respectively, but that may not
happen if the target frequency does not change along with the limit
at hand. In particular, if the policy min is changed first, causing
the target frequency to be adjusted to it, and the policy max limit
is changed later to the same value, the HWP max limit will not be
updated to follow it as expected, because the target frequency is
still equal to the policy min limit and it will not change until
that limit is updated.
To address this issue, modify get_next_freq() to let the driver
callback run if the CPUFREQ_NEED_UPDATE_LIMITS cpufreq driver flag
is set regardless of whether or not the new frequency to set is
equal to the previous one.
Fixes: f6ebbcf08f ("cpufreq: intel_pstate: Implement passive mode with HWP enabled")
Reported-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Cc: 5.9+ <stable@vger.kernel.org> # 5.9+: 1c534352f4 cpufreq: Introduce CPUFREQ_NEED_UPDATE_LIMITS ...
Cc: 5.9+ <stable@vger.kernel.org> # 5.9+: a62f68f5ca cpufreq: Introduce cpufreq_driver_test_flags()
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
New synthetic event code used strcat() and miscalculated the ending, causing
the concatenation to write beyond the allocated memory.
Instead of using strncat(), the code is switched over to seq_buf which has
all the mechanisms in place to protect against writing more than what is
allocated, and cleans up the code a bit.
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCX5lZkBQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qu8+AQDfg1UM12HUIs1XRhbXBxf9g3kjwrJh
nuoMilEZZstSCgD8DDQiPckOS9NfrdkyCPQ86tIKoOsGPowoA21sNOHPvQQ=
=+V+S
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fix from Steven Rostedt:
"Fix synthetic event "strcat" overrun
New synthetic event code used strcat() and miscalculated the ending,
causing the concatenation to write beyond the allocated memory.
Instead of using strncat(), the code is switched over to seq_buf which
has all the mechanisms in place to protect against writing more than
what is allocated, and cleans up the code a bit"
* tag 'trace-v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing, synthetic events: Replace buggy strcat() with seq_buf operations
If should_futex_fail() returns true in futex_wake_pi(), then the 'ret'
variable is set to -EFAULT and then immediately overwritten. So the failure
injection is non-functional.
Fix it by actually leaving the function and returning -EFAULT.
The Fixes tag is kinda blury because the initial commit which introduced
failure injection was already sloppy, but the below mentioned commit broke
it completely.
[ tglx: Massaged changelog ]
Fixes: 6b4f4bc9cb ("locking/futex: Allow low-level atomic operations to return -EAGAIN")
Signed-off-by: Mateusz Nosek <mateusznosek0@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200927000858.24219-1-mateusznosek0@gmail.com
Fix a typo in a comment in freeze_processes().
Signed-off-by: Jackie Zamow <jackie.zamow@gmail.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
There was a memory corruption bug happening while running the synthetic
event selftests:
kmemleak: Cannot insert 0xffff8c196fa2afe5 into the object search tree (overlaps existing)
CPU: 5 PID: 6866 Comm: ftracetest Tainted: G W 5.9.0-rc5-test+ #577
Hardware name: Hewlett-Packard HP Compaq Pro 6300 SFF/339A, BIOS K01 v03.03 07/14/2016
Call Trace:
dump_stack+0x8d/0xc0
create_object.cold+0x3b/0x60
slab_post_alloc_hook+0x57/0x510
? tracing_map_init+0x178/0x340
__kmalloc+0x1b1/0x390
tracing_map_init+0x178/0x340
event_hist_trigger_func+0x523/0xa40
trigger_process_regex+0xc5/0x110
event_trigger_write+0x71/0xd0
vfs_write+0xca/0x210
ksys_write+0x70/0xf0
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fef0a63a487
Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
RSP: 002b:00007fff76f18398 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000039 RCX: 00007fef0a63a487
RDX: 0000000000000039 RSI: 000055eb3b26d690 RDI: 0000000000000001
RBP: 000055eb3b26d690 R08: 000000000000000a R09: 0000000000000038
R10: 000055eb3b2cdb80 R11: 0000000000000246 R12: 0000000000000039
R13: 00007fef0a70b500 R14: 0000000000000039 R15: 00007fef0a70b700
kmemleak: Kernel memory leak detector disabled
kmemleak: Object 0xffff8c196fa2afe0 (size 8):
kmemleak: comm "ftracetest", pid 6866, jiffies 4295082531
kmemleak: min_count = 1
kmemleak: count = 0
kmemleak: flags = 0x1
kmemleak: checksum = 0
kmemleak: backtrace:
__kmalloc+0x1b1/0x390
tracing_map_init+0x1be/0x340
event_hist_trigger_func+0x523/0xa40
trigger_process_regex+0xc5/0x110
event_trigger_write+0x71/0xd0
vfs_write+0xca/0x210
ksys_write+0x70/0xf0
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xa9
The cause came down to a use of strcat() that was adding an string that was
shorten, but the strcat() did not take that into account.
strcat() is extremely dangerous as it does not care how big the buffer is.
Replace it with seq_buf operations that prevent the buffer from being
overwritten if what is being written is bigger than the buffer.
Fixes: 10819e2579 ("tracing: Handle synthetic event array field type checking correctly")
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Tested-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Some architectures assume that the stopped CPUs don't make function calls
to traceable functions when they are in the stopped state. See also commit
cb9d7fd51d ("watchdog: Mark watchdog touch functions as notrace").
Violating this assumption causes kernel crashes when switching tracer on
RISC-V.
Mark rcu_momentary_dyntick_idle() and stop_machine_yield() notrace to
prevent this.
Fixes: 4ecf0a43e7 ("processor: get rid of cpu_relax_yield")
Fixes: 366237e7b0 ("stop_machine: Provide RCU quiescent state in multi_cpu_stop()")
Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Atish Patra <atish.patra@wdc.com>
Tested-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20201021073839.43935-1-zong.li@sifive.com
UBSAN reports:
Undefined behaviour in ./include/linux/time64.h:127:27
signed integer overflow:
17179869187 * 1000000000 cannot be represented in type 'long long int'
Call Trace:
timespec64_to_ns include/linux/time64.h:127 [inline]
set_cpu_itimer+0x65c/0x880 kernel/time/itimer.c:180
do_setitimer+0x8e/0x740 kernel/time/itimer.c:245
__x64_sys_setitimer+0x14c/0x2c0 kernel/time/itimer.c:336
do_syscall_64+0xa1/0x540 arch/x86/entry/common.c:295
Commit bd40a17576 ("y2038: itimer: change implementation to timespec64")
replaced the original conversion which handled time clamping correctly with
timespec64_to_ns() which has no overflow protection.
Fix it in timespec64_to_ns() as this is not necessarily limited to the
usage in itimers.
[ tglx: Added comment and adjusted the fixes tag ]
Fixes: 361a3bf005 ("time64: Add time64.h header and define struct timespec64")
Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1598952616-6416-1-git-send-email-prime.zeng@hisilicon.com
Since sched_clock_read_begin() and sched_clock_read_retry() are called
by notrace function sched_clock(), they shouldn't be traceable either,
or else ftrace_graph_caller will run into a dead loop on the path
as below (arm for instance):
ftrace_graph_caller()
prepare_ftrace_return()
function_graph_enter()
ftrace_push_return_trace()
trace_clock_local()
sched_clock()
sched_clock_read_begin/retry()
Fixes: 1b86abc1c6 ("sched_clock: Expose struct clock_read_data")
Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200929082027.16787-1-quanyang.wang@windriver.com
Use a more generic form for __section that requires quotes to avoid
complications with clang and gcc differences.
Remove the quote operator # from compiler_attributes.h __section macro.
Convert all unquoted __section(foo) uses to quoted __section("foo").
Also convert __attribute__((section("foo"))) uses to __section("foo")
even if the __attribute__ has multiple list entry forms.
Conversion done using the script at:
https://lore.kernel.org/lkml/75393e5ddc272dc7403de74d645e6c6e0f4e70eb.camel@perches.com/2-convert_section.pl
Signed-off-by: Joe Perches <joe@perches.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@gooogle.com>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
tid_addr is not a "pointer to (pointer to int in userspace)"; it is in
fact a "pointer to (pointer to int in userspace) in userspace". So
sparse rightfully complains about passing a kernel pointer to
put_user().
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
which are based on CLOCK_MONOTONIC require time namespace corrected. This
was missed in the original time namesapce support.
-----BEGIN PGP SIGNATURE-----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=VFCv
-----END PGP SIGNATURE-----
Merge tag 'timers-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Thomas Gleixner:
"A time namespace fix and a matching selftest. The futex absolute
timeouts which are based on CLOCK_MONOTONIC require time namespace
corrected. This was missed in the original time namesapce support"
* tag 'timers-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
selftests/timens: Add a test for futex()
futex: Adjust absolute futex timeouts with per time namespace offset
- A trivial build fix for sched_feat() to compile correctly with
CONFIG_JUMP_LABEL=n
- Replace a zero lenght array with a flexible array.
-----BEGIN PGP SIGNATURE-----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=RNOk
-----END PGP SIGNATURE-----
Merge tag 'sched-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
"Two scheduler fixes:
- A trivial build fix for sched_feat() to compile correctly with
CONFIG_JUMP_LABEL=n
- Replace a zero lenght array with a flexible array"
* tag 'sched-urgent-2020-10-25' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/features: Fix !CONFIG_JUMP_LABEL case
sched: Replace zero-length array with flexible-array
-----BEGIN PGP SIGNATURE-----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=/anB
-----END PGP SIGNATURE-----
Merge tag 'safesetid-5.10' of git://github.com/micah-morton/linux
Pull SafeSetID updates from Micah Morton:
"The changes are mostly contained to within the SafeSetID LSM, with the
exception of a few 1-line changes to change some ns_capable() calls to
ns_capable_setid() -- causing a flag (CAP_OPT_INSETID) to be set that
is examined by SafeSetID code and nothing else in the kernel.
The changes to SafeSetID internally allow for setting up GID
transition security policies, as already existed for UIDs"
* tag 'safesetid-5.10' of git://github.com/micah-morton/linux:
LSM: SafeSetID: Fix warnings reported by test bot
LSM: SafeSetID: Add GID security policy handling
LSM: Signal to SafeSetID when setting group IDs
This is the cleanup of the latest series of prandom_u32 experimentations
consisting in using SipHash instead of Tausworthe to produce the randoms
used by the network stack. The changes to the files were kept minimal,
and the controversial commit that used to take noise from the fast_pool
(f227e3ec3b) was reverted. Instead, a dedicated "net_rand_noise" per_cpu
variable is fed from various sources of activities (networking, scheduling)
to perturb the SipHash state using fast, non-trivially predictable data,
instead of keeping it fully deterministic. The goal is essentially to make
any occasional memory leakage or brute-force attempt useless.
The resulting code was verified to be very slightly faster on x86_64 than
what is was with the controversial commit above, though this remains barely
above measurement noise. It was also tested on i386 and arm, and build-
tested only on arm64.
The whole discussion around this is archived here:
https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
-----BEGIN PGP SIGNATURE-----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=KHhI
-----END PGP SIGNATURE-----
Merge tag '20201024-v4-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom
Pull random32 updates from Willy Tarreau:
"Make prandom_u32() less predictable.
This is the cleanup of the latest series of prandom_u32
experimentations consisting in using SipHash instead of Tausworthe to
produce the randoms used by the network stack.
The changes to the files were kept minimal, and the controversial
commit that used to take noise from the fast_pool (f227e3ec3b) was
reverted. Instead, a dedicated "net_rand_noise" per_cpu variable is
fed from various sources of activities (networking, scheduling) to
perturb the SipHash state using fast, non-trivially predictable data,
instead of keeping it fully deterministic. The goal is essentially to
make any occasional memory leakage or brute-force attempt useless.
The resulting code was verified to be very slightly faster on x86_64
than what is was with the controversial commit above, though this
remains barely above measurement noise. It was also tested on i386 and
arm, and build- tested only on arm64"
Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
* tag '20201024-v4-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/prandom:
random32: add a selftest for the prandom32 code
random32: add noise from network and scheduling activity
random32: make prandom_u32() output unpredictable
- document the new document dma_{alloc,free}_pages API
- two fixups for the dma-mapping.h split
-----BEGIN PGP SIGNATURE-----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=0N7Y
-----END PGP SIGNATURE-----
Merge tag 'dma-mapping-5.10-1' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig:
- document the new dma_{alloc,free}_pages() API
- two fixups for the dma-mapping.h split
* tag 'dma-mapping-5.10-1' of git://git.infradead.org/users/hch/dma-mapping:
dma-mapping: document dma_{alloc,free}_pages
dma-mapping: move more functions to dma-map-ops.h
ARM/sa1111: add a missing include of dma-map-ops.h
With the removal of the interrupt perturbations in previous random32
change (random32: make prandom_u32() output unpredictable), the PRNG
has become 100% deterministic again. While SipHash is expected to be
way more robust against brute force than the previous Tausworthe LFSR,
there's still the risk that whoever has even one temporary access to
the PRNG's internal state is able to predict all subsequent draws till
the next reseed (roughly every minute). This may happen through a side
channel attack or any data leak.
This patch restores the spirit of commit f227e3ec3b ("random32: update
the net random state on interrupt and activity") in that it will perturb
the internal PRNG's statee using externally collected noise, except that
it will not pick that noise from the random pool's bits nor upon
interrupt, but will rather combine a few elements along the Tx path
that are collectively hard to predict, such as dev, skb and txq
pointers, packet length and jiffies values. These ones are combined
using a single round of SipHash into a single long variable that is
mixed with the net_rand_state upon each invocation.
The operation was inlined because it produces very small and efficient
code, typically 3 xor, 2 add and 2 rol. The performance was measured
to be the same (even very slightly better) than before the switch to
SipHash; on a 6-core 12-thread Core i7-8700k equipped with a 40G NIC
(i40e), the connection rate dropped from 556k/s to 555k/s while the
SYN cookie rate grew from 5.38 Mpps to 5.45 Mpps.
Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
Cc: George Spelvin <lkml@sdf.org>
Cc: Amit Klein <aksecurity@gmail.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: tytso@mit.edu
Cc: Florian Westphal <fw@strlen.de>
Cc: Marc Plumb <lkml.mplumb@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Non-cryptographic PRNGs may have great statistical properties, but
are usually trivially predictable to someone who knows the algorithm,
given a small sample of their output. An LFSR like prandom_u32() is
particularly simple, even if the sample is widely scattered bits.
It turns out the network stack uses prandom_u32() for some things like
random port numbers which it would prefer are *not* trivially predictable.
Predictability led to a practical DNS spoofing attack. Oops.
This patch replaces the LFSR with a homebrew cryptographic PRNG based
on the SipHash round function, which is in turn seeded with 128 bits
of strong random key. (The authors of SipHash have *not* been consulted
about this abuse of their algorithm.) Speed is prioritized over security;
attacks are rare, while performance is always wanted.
Replacing all callers of prandom_u32() is the quick fix.
Whether to reinstate a weaker PRNG for uses which can tolerate it
is an open question.
Commit f227e3ec3b ("random32: update the net random state on interrupt
and activity") was an earlier attempt at a solution. This patch replaces
it.
Reported-by: Amit Klein <aksecurity@gmail.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Eric Dumazet <edumazet@google.com>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: tytso@mit.edu
Cc: Florian Westphal <fw@strlen.de>
Cc: Marc Plumb <lkml.mplumb@gmail.com>
Fixes: f227e3ec3b ("random32: update the net random state on interrupt and activity")
Signed-off-by: George Spelvin <lkml@sdf.org>
Link: https://lore.kernel.org/netdev/20200808152628.GA27941@SDF.ORG/
[ willy: partial reversal of f227e3ec3b5c; moved SIPROUND definitions
to prandom.h for later use; merged George's prandom_seed() proposal;
inlined siprand_u32(); replaced the net_rand_state[] array with 4
members to fix a build issue; cosmetic cleanups to make checkpatch
happy; fixed RANDOM32_SELFTEST build ]
Signed-off-by: Willy Tarreau <w@1wt.eu>
The success return value of ring_buffer_resize() is stated to be zero,
and checked that way. But it is incorrectly returning the size allocated.
Also, a fix to a comment.
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCX5LnlRQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6qtPxAP439tmV1wWK4uBF6TLBahaPdj0tGe5b
NT/ASnYjokZKWgEA//vmUBMMmNBohcd8DkkTu8Pp3tkc2b4RLR5WJIpXGwk=
=1Og+
-----END PGP SIGNATURE-----
Merge tag 'trace-v5.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing ring-buffer fix from Steven Rostedt:
"The success return value of ring_buffer_resize() is stated to be
zero and checked that way.
But it was incorrectly returning the size allocated.
Also, a fix to a comment"
* tag 'trace-v5.10-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ring-buffer: Update the description for ring_buffer_wait
ring-buffer: Return 0 on success from ring_buffer_resize()
- Move the AVS drivers to new platform-specific locations and get
rid of the drivers/power/avs directory (Ulf Hansson).
- Add on/off notifiers and idle state accounting support to the
generic power domains (genpd) framework (Ulf Hansson, Lina Iyer).
- Ulf will maintain the PM domain part of cpuidle-psci (Ulf Hansson).
- Make intel_idle disregard ACPI _CST if it cannot use the data
returned by that method (Mel Gorman).
- Modify intel_pstate to avoid leaving useless sysfs directory
structure behind if it cannot be registered (Chen Yu).
- Fix domain detection in the RAPL power capping driver and prevent
it from failing to enumerate the Psys RAPL domain (Zhang Rui).
- Allow acpi-cpufreq to use ACPI _PSD information with Family 19 and
later AMD chips (Wei Huang).
- Update the driver assumptions comment in intel_idle and fix a
kerneldoc comment in the runtime PM framework (Alexander Monakov,
Bean Huo).
- Avoid unnecessary resets of the cached frequency in the schedutil
cpufreq governor to reduce overhead (Wei Wang).
- Clean up the cpufreq core a bit (Viresh Kumar).
- Make assorted minor janitorial changes (Daniel Lezcano, Geert
Uytterhoeven, Hubert Jasudowicz, Tom Rix).
- Clean up and optimize the cpupower utility somewhat (Colin Ian
King, Martin Kaistra).
-----BEGIN PGP SIGNATURE-----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=TFKg
-----END PGP SIGNATURE-----
Merge tag 'pm-5.10-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"First of all, the adaptive voltage scaling (AVS) drivers go to new
platform-specific locations as planned (this part was reported to have
merge conflicts against the new arm-soc updates in linux-next).
In addition to that, there are some fixes (intel_idle, intel_pstate,
RAPL, acpi_cpufreq), the addition of on/off notifiers and idle state
accounting support to the generic power domains (genpd) code and some
janitorial changes all over.
Specifics:
- Move the AVS drivers to new platform-specific locations and get rid
of the drivers/power/avs directory (Ulf Hansson).
- Add on/off notifiers and idle state accounting support to the
generic power domains (genpd) framework (Ulf Hansson, Lina Iyer).
- Ulf will maintain the PM domain part of cpuidle-psci (Ulf Hansson).
- Make intel_idle disregard ACPI _CST if it cannot use the data
returned by that method (Mel Gorman).
- Modify intel_pstate to avoid leaving useless sysfs directory
structure behind if it cannot be registered (Chen Yu).
- Fix domain detection in the RAPL power capping driver and prevent
it from failing to enumerate the Psys RAPL domain (Zhang Rui).
- Allow acpi-cpufreq to use ACPI _PSD information with Family 19 and
later AMD chips (Wei Huang).
- Update the driver assumptions comment in intel_idle and fix a
kerneldoc comment in the runtime PM framework (Alexander Monakov,
Bean Huo).
- Avoid unnecessary resets of the cached frequency in the schedutil
cpufreq governor to reduce overhead (Wei Wang).
- Clean up the cpufreq core a bit (Viresh Kumar).
- Make assorted minor janitorial changes (Daniel Lezcano, Geert
Uytterhoeven, Hubert Jasudowicz, Tom Rix).
- Clean up and optimize the cpupower utility somewhat (Colin Ian
King, Martin Kaistra)"
* tag 'pm-5.10-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (23 commits)
PM: sleep: remove unreachable break
PM: AVS: Drop the avs directory and the corresponding Kconfig
PM: AVS: qcom-cpr: Move the driver to the qcom specific drivers
PM: runtime: Fix typo in pm_runtime_set_active() helper comment
PM: domains: Fix build error for genpd notifiers
powercap: Fix typo in Kconfig "Plance" -> "Plane"
cpufreq: schedutil: restore cached freq when next_f is not changed
acpi-cpufreq: Honor _PSD table setting on new AMD CPUs
PM: AVS: smartreflex Move driver to soc specific drivers
PM: AVS: rockchip-io: Move the driver to the rockchip specific drivers
PM: domains: enable domain idle state accounting
PM: domains: Add curly braces to delimit comment + statement block
PM: domains: Add support for PM domain on/off notifiers for genpd
powercap/intel_rapl: enumerate Psys RAPL domain together with package RAPL domain
powercap/intel_rapl: Fix domain detection
intel_idle: Ignore _CST if control cannot be taken from the platform
cpuidle: Remove pointless stub
intel_idle: mention assumption that WBINVD is not needed
MAINTAINERS: Add section for cpuidle-psci PM domain
cpufreq: intel_pstate: Delete intel_pstate sysfs if failed to register the driver
...
Cross-tree/merge window issues:
- rtl8150: don't incorrectly assign random MAC addresses; fix late
in the 5.9 cycle started depending on a return code from
a function which changed with the 5.10 PR from the usb subsystem
Current release - regressions:
- Revert "virtio-net: ethtool configurable RXCSUM", it was causing
crashes at probe when control vq was not negotiated/available
Previous releases - regressions:
- ixgbe: fix probing of multi-port 10 Gigabit Intel NICs with an MDIO
bus, only first device would be probed correctly
- nexthop: Fix performance regression in nexthop deletion by
effectively switching from recently added synchronize_rcu()
to synchronize_rcu_expedited()
- netsec: ignore 'phy-mode' device property on ACPI systems;
the property is not populated correctly by the firmware,
but firmware configures the PHY so just keep boot settings
Previous releases - always broken:
- tcp: fix to update snd_wl1 in bulk receiver fast path, addressing
bulk transfers getting "stuck"
- icmp: randomize the global rate limiter to prevent attackers from
getting useful signal
- r8169: fix operation under forced interrupt threading, make the
driver always use hard irqs, even on RT, given the handler is
light and only wants to schedule napi (and do so through
a _irqoff() variant, preferably)
- bpf: Enforce pointer id generation for all may-be-null register
type to avoid pointers erroneously getting marked as null-checked
- tipc: re-configure queue limit for broadcast link
- net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN
tunnels
- fix various issues in chelsio inline tls driver
Misc:
- bpf: improve just-added bpf_redirect_neigh() helper api to support
supplying nexthop by the caller - in case BPF program has already
done a lookup we can avoid doing another one
- remove unnecessary break statements
- make MCTCP not select IPV6, but rather depend on it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=ceke
-----END PGP SIGNATURE-----
Merge tag 'net-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Cross-tree/merge window issues:
- rtl8150: don't incorrectly assign random MAC addresses; fix late in
the 5.9 cycle started depending on a return code from a function
which changed with the 5.10 PR from the usb subsystem
Current release regressions:
- Revert "virtio-net: ethtool configurable RXCSUM", it was causing
crashes at probe when control vq was not negotiated/available
Previous release regressions:
- ixgbe: fix probing of multi-port 10 Gigabit Intel NICs with an MDIO
bus, only first device would be probed correctly
- nexthop: Fix performance regression in nexthop deletion by
effectively switching from recently added synchronize_rcu() to
synchronize_rcu_expedited()
- netsec: ignore 'phy-mode' device property on ACPI systems; the
property is not populated correctly by the firmware, but firmware
configures the PHY so just keep boot settings
Previous releases - always broken:
- tcp: fix to update snd_wl1 in bulk receiver fast path, addressing
bulk transfers getting "stuck"
- icmp: randomize the global rate limiter to prevent attackers from
getting useful signal
- r8169: fix operation under forced interrupt threading, make the
driver always use hard irqs, even on RT, given the handler is light
and only wants to schedule napi (and do so through a _irqoff()
variant, preferably)
- bpf: Enforce pointer id generation for all may-be-null register
type to avoid pointers erroneously getting marked as null-checked
- tipc: re-configure queue limit for broadcast link
- net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN
tunnels
- fix various issues in chelsio inline tls driver
Misc:
- bpf: improve just-added bpf_redirect_neigh() helper api to support
supplying nexthop by the caller - in case BPF program has already
done a lookup we can avoid doing another one
- remove unnecessary break statements
- make MCTCP not select IPV6, but rather depend on it"
* tag 'net-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (62 commits)
tcp: fix to update snd_wl1 in bulk receiver fast path
net: Properly typecast int values to set sk_max_pacing_rate
netfilter: nf_fwd_netdev: clear timestamp in forwarding path
ibmvnic: save changed mac address to adapter->mac_addr
selftests: mptcp: depends on built-in IPv6
Revert "virtio-net: ethtool configurable RXCSUM"
rtnetlink: fix data overflow in rtnl_calcit()
net: ethernet: mtk-star-emac: select REGMAP_MMIO
net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup
net: hdlc: In hdlc_rcv, check to make sure dev is an HDLC device
bpf, libbpf: Guard bpf inline asm from bpf_tail_call_static
bpf, selftests: Extend test_tc_redirect to use modified bpf_redirect_neigh()
bpf: Fix bpf_redirect_neigh helper api to support supplying nexthop
mptcp: depends on IPV6 but not as a module
sfc: move initialisation of efx->filter_sem to efx_init_struct()
mpls: load mpls_gso after mpls_iptunnel
net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels
net/sched: act_gate: Unlock ->tcfa_lock in tc_setup_flow_action()
net: dsa: bcm_sf2: make const array static, makes object smaller
mptcp: MPTCP_IPV6 should depend on IPV6 instead of selecting it
...
-----BEGIN PGP SIGNATURE-----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=aVWo
-----END PGP SIGNATURE-----
Merge tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-block
Pull arch task_work cleanups from Jens Axboe:
"Two cleanups that don't fit other categories:
- Finally get the task_work_add() cleanup done properly, so we don't
have random 0/1/false/true/TWA_SIGNAL confusing use cases. Updates
all callers, and also fixes up the documentation for
task_work_add().
- While working on some TIF related changes for 5.11, this
TIF_NOTIFY_RESUME cleanup fell out of that. Remove some arch
duplication for how that is handled"
* tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-block:
task_work: cleanup notification modes
tracehook: clear TIF_NOTIFY_RESUME in tracehook_notify_resume()
- Support 'make compile_commands.json' to generate the compilation
database more easily, avoiding stale entries
- Support 'make clang-analyzer' and 'make clang-tidy' for static checks
using clang-tidy
- Preprocess scripts/modules.lds.S to allow CONFIG options in the module
linker script
- Drop cc-option tests from compiler flags supported by our minimal
GCC/Clang versions
- Use always 12-digits commit hash for CONFIG_LOCALVERSION_AUTO=y
- Use sha1 build id for both BFD linker and LLD
- Improve deb-pkg for reproducible builds and rootless builds
- Remove stale, useless scripts/namespace.pl
- Turn -Wreturn-type warning into error
- Fix build error of deb-pkg when CONFIG_MODULES=n
- Replace 'hostname' command with more portable 'uname -n'
- Various Makefile cleanups
-----BEGIN PGP SIGNATURE-----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=tZRN
-----END PGP SIGNATURE-----
Merge tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild updates from Masahiro Yamada:
- Support 'make compile_commands.json' to generate the compilation
database more easily, avoiding stale entries
- Support 'make clang-analyzer' and 'make clang-tidy' for static checks
using clang-tidy
- Preprocess scripts/modules.lds.S to allow CONFIG options in the
module linker script
- Drop cc-option tests from compiler flags supported by our minimal
GCC/Clang versions
- Use always 12-digits commit hash for CONFIG_LOCALVERSION_AUTO=y
- Use sha1 build id for both BFD linker and LLD
- Improve deb-pkg for reproducible builds and rootless builds
- Remove stale, useless scripts/namespace.pl
- Turn -Wreturn-type warning into error
- Fix build error of deb-pkg when CONFIG_MODULES=n
- Replace 'hostname' command with more portable 'uname -n'
- Various Makefile cleanups
* tag 'kbuild-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
kbuild: Use uname for LINUX_COMPILE_HOST detection
kbuild: Only add -fno-var-tracking-assignments for old GCC versions
kbuild: remove leftover comment for filechk utility
treewide: remove DISABLE_LTO
kbuild: deb-pkg: clean up package name variables
kbuild: deb-pkg: do not build linux-headers package if CONFIG_MODULES=n
kbuild: enforce -Werror=return-type
scripts: remove namespace.pl
builddeb: Add support for all required debian/rules targets
builddeb: Enable rootless builds
builddeb: Pass -n to gzip for reproducible packages
kbuild: split the build log of kallsyms
kbuild: explicitly specify the build id style
scripts/setlocalversion: make git describe output more reliable
kbuild: remove cc-option test of -Werror=date-time
kbuild: remove cc-option test of -fno-stack-check
kbuild: remove cc-option test of -fno-strict-overflow
kbuild: move CFLAGS_{KASAN,UBSAN,KCSAN} exports to relevant Makefiles
kbuild: remove redundant CONFIG_KASAN check from scripts/Makefile.kasan
kbuild: do not create built-in objects for external module builds
...
