Currently, for ARM kernels with CONFIG_ARM_LPAE and
CONFIG_STRICT_KERNEL_RWX enabled, the 2MiB pages mapping the
kernel code and rodata are writable. They are marked read-only in
a software bit (L_PMD_SECT_RDONLY) but the hardware read-only bit
is not set (PMD_SECT_AP2).
For user mappings, the logic that propagates the software bit
to the hardware bit is in set_pmd_at(); but for the kernel,
section_update() writes the PMDs directly, skipping this logic.
The fix is to set PMD_SECT_AP2 for read-only sections in
section_update(), at the same time as L_PMD_SECT_RDONLY.
Fixes: 1e3479225a ("ARM: 8275/1: mm: fix PMD_SECT_RDONLY undeclared compile error")
Signed-off-by: Philip Derrin <philip@cog.systems>
Reported-by: Neil Dick <neil@cog.systems>
Tested-by: Neil Dick <neil@cog.systems>
Tested-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
When CONFIG_ARM_LPAE is set, the PMD dump relies on the software
read-only bit to determine whether a page is writable. This
concealed a bug which left the kernel text section writable
(AP2=0) while marked read-only in the software bit.
In a kernel with the AP2 bug, the dump looks like this:
---[ Kernel Mapping ]---
0xc0000000-0xc0200000 2M RW NX SHD
0xc0200000-0xc0600000 4M ro x SHD
0xc0600000-0xc0800000 2M ro NX SHD
0xc0800000-0xc4800000 64M RW NX SHD
The fix is to check that the software and hardware bits are both
set before displaying "ro". The dump then shows the true perms:
---[ Kernel Mapping ]---
0xc0000000-0xc0200000 2M RW NX SHD
0xc0200000-0xc0600000 4M RW x SHD
0xc0600000-0xc0800000 2M RW NX SHD
0xc0800000-0xc4800000 64M RW NX SHD
Fixes: ded9477984 ("ARM: 8109/1: mm: Modify pte_write and pmd_write logic for LPAE")
Signed-off-by: Philip Derrin <philip@cog.systems>
Tested-by: Neil Dick <neil@cog.systems>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Make the decompressor debug output user selectable, otherwise merely
enabling DEBUG_LL causes the decompressor to become board specific,
thereby preventing a multi-platform kernel from booting. Enabling
DEBUG_LL doesn't cause the kernel itself to become platform specific
unless EARLY_PRINTK is enabled, or one of the debugging routines is
added in a path that results in it being called.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Ensure that get_user_pages_fast() is not able to access memory which
has been mapped with PROT_NONE.
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
commit 3179f62001 ("ALSA: core: add .get_time_info") had a side effect
of changing the behaviour of the PCM runtime tstamp. Prior to this
change tstamp was not updated by snd_pcm_update_hw_ptr0() unless the
hw_ptr had moved, after this change tstamp was always updated.
For an application using alsa-lib, doing snd_pcm_readi() followed by
snd_pcm_status() to estimate the age of the read samples by subtracting
status->avail * [sample rate] from status->tstamp this change degraded
the accuracy of the estimate on devices where the pcm hw does not
provide a granular hw_ptr, e.g., devices using
soc-generic-dmaengine-pcm.c and a dma-engine with residue_granularity
DMA_RESIDUE_GRANULARITY_DESCRIPTOR. The accuracy of the estimate
depended on the latency between the PCM hw completing a period and the
driver called snd_pcm_period_elapsed() to notify ALSA core, typically
determined by interrupt handling latency. After the change the accuracy
of the estimate depended on the latency between the PCM hw completing a
period and the application calling snd_pcm_status(), determined by the
scheduling of the application process. The maximum error of the
estimate is one period length in both cases, but the error average and
variance is smaller when it depends on interrupt latency.
Instead of always updating tstamp, update it only if audio_tstamp
changed.
Fixes: 3179f62001 ("ALSA: core: add .get_time_info")
Suggested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Henrik Eriksson <henrik.eriksson@axis.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
* straggler timer conversions from Kees
* memory leak fix in hwsim
* fix some fallout from regdb changes if wireless is built-in
* also free aggregation sessions in startup state when station
goes away, to avoid crashing the timer
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Merge tag 'mac80211-for-davem-2017-11-20' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
A few things:
* straggler timer conversions from Kees
* memory leak fix in hwsim
* fix some fallout from regdb changes if wireless is built-in
* also free aggregation sessions in startup state when station
goes away, to avoid crashing the timer
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 0115552eac ("nfp: remove false positive offloads
in flower vxlan") missed adding kdoc for a new parameter
of nfp_flower_add_offload().
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the function tipc_group_filter_msg() finds that a member event
indicates that the member is leaving the group, it first deletes the
member instance, and then purges the message queue being handled
by the call. But the message queue is an aggregated field in the
just deleted item, leading the purge call to access freed memory.
We fix this by swapping the order of the two actions.
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Quectel BG96 is an Qualcomm MDM9206 based IoT modem, supporting both
CAT-M and NB-IoT. Tested hardware is BG96 mounted on Quectel development
board (EVB). The USB id is added to qmi_wwan.c to allow QMI
communication with the BG96.
Signed-off-by: Sebastian Sjoholm <ssjoholm@mac.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
On some systems, when we unsplit a port we need to re-create two ports
instead. On other systems, only one needs to be re-created.
Do not try to create a port if during driver initialization it was
assigned a negative module number, which is invalid.
This avoids the following error during unsplit:
[ 941.012478] mlxsw_spectrum 0000:01:00.0: Port 43: Failed to map module
The error is harmless and caused by the fact that a local port is
already mapped to module 0.
Fixes: be94535f95 ("mlxsw: spectrum: Make split flow match firmware requirements")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
It used to be that unconfined would never attach. However that is not
the case anymore as some special profiles can be marked as unconfined,
that are not the namespaces unconfined profile, and may have an
attachment.
Fixes: f1bd904175 ("apparmor: add the base fns() for domain labels")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Profiles that have an undecidable overlap in their attachments are
being incorrectly handled. Instead of failing to attach the first one
encountered is being used.
eg.
profile A /** { .. }
profile B /*foo { .. }
have an unresolvable longest left attachment, they both have an exact
match on / and then have an overlapping expression that has no clear
winner.
Currently the winner will be the profile that is loaded first which
can result in non-deterministic behavior. Instead in this situation
the exec should fail.
Fixes: 898127c34e ("AppArmor: functions for domain transitions")
Signed-off-by: John Johansen <john.johansen@canonical.com>
Fixes: d07881d2ed ("apparmor: move new_null_profile to after profile lookup fns()")
Reported-by: Seth Arnold <seth.arnold@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
The boolean variable 'stop' is being set but never read. This
is a redundant variable and can be removed.
Cleans up clang warning: Value stored to 'stop' is never read
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Bool initializations should use true and false. Bool tests don't need
comparisons.
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: John Johansen <john.johansen@canonical.com>
gcc-4.4 points out suspicious code in compute_mnt_perms, where
the aa_perms structure is only partially initialized before getting
returned:
security/apparmor/mount.c: In function 'compute_mnt_perms':
security/apparmor/mount.c:227: error: 'perms.prompt' is used uninitialized in this function
security/apparmor/mount.c:227: error: 'perms.hide' is used uninitialized in this function
security/apparmor/mount.c:227: error: 'perms.cond' is used uninitialized in this function
security/apparmor/mount.c:227: error: 'perms.complain' is used uninitialized in this function
security/apparmor/mount.c:227: error: 'perms.stop' is used uninitialized in this function
security/apparmor/mount.c:227: error: 'perms.deny' is used uninitialized in this function
Returning or assigning partially initialized structures is a bit tricky,
in particular it is explicitly allowed in c99 to assign a partially
initialized structure to another, as long as only members are read that
have been initialized earlier. Looking at what various compilers do here,
the version that produced the warning copied uninitialized stack data,
while newer versions (and also clang) either set the other members to
zero or don't update the parts of the return buffer that are not modified
in the temporary structure, but they never warn about this.
In case of apparmor, it seems better to be a little safer and always
initialize the aa_perms structure. Most users already do that, this
changes the remaining ones, including the one instance that I got the
warning for.
Fixes: fa488437d0f9 ("apparmor: add mount mediation")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Seth Arnold <seth.arnold@canonical.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Export the symbol chip_to_vas_id() to fix a build failure when
CONFIG_CRYPTO_DEV_NX_COMPRESS_POWERNV=m.
Fixes: d4ef61b5e8 ("powerpc/vas, nx-842: Define and use chip_to_vas_id()")
Reported-by: Haren Myneni <hbabu@us.ibm.com>
Reported-by: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
ath.git fixes for 4.15. Major changes:
ath10k
* fix CCMP-256, GCMP and GCMP-256 in raw mode, they never worked with raw mode
wcn36xx
* fix device tree node search
And move them to xfs_linux.h so that xfsprogs can stub them out more
easily.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
found the issue by kmemleak.
unreferenced object 0xffff8800674611c0 (size 16):
xfs_iext_insert+0x82a/0xa90 [xfs]
xfs_bmap_add_extent_hole_delay+0x1e5/0x5b0 [xfs]
xfs_bmapi_reserve_delalloc+0x483/0x530 [xfs]
xfs_file_iomap_begin+0xac8/0xd40 [xfs]
iomap_apply+0xb8/0x1b0
iomap_file_buffered_write+0xac/0xe0
xfs_file_buffered_aio_write+0x198/0x420 [xfs]
xfs_file_write_iter+0x23f/0x2a0 [xfs]
__vfs_write+0x23e/0x340
vfs_write+0xe9/0x240
SyS_write+0xa1/0x120
do_syscall_64+0xda/0x260
Signed-off-by: Shu Wang <shuwang@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Moving the init_clock_gating() call from intel_modeset_init_hw() to
intel_modeset_gem_init() had an unintended effect of not applying
some workarounds on resume. This, for example, cause some kind of
corruption to appear at the top of my IVB Thinkpad X1 Carbon LVDS
screen after hibernation. Fix the problem by explicitly calling
init_clock_gating() from the resume path.
I really hope this doesn't break something else again. At least
the problems reported at https://bugs.freedesktop.org/show_bug.cgi?id=103549
didn't make a comeback, even after a hibernate cycle.
v2: Reorder the init_clock_gating vs. modeset_init_hw to match
the display reset path (Rodrigo)
Cc: stable@vger.kernel.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Fixes: 6ac4327276 ("drm/i915: Move init_clock_gating() back to where it was")
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171116160215.25715-1-ville.syrjala@linux.intel.com
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
(cherry picked from commit 675f7ff35b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
When we call intel_engine_cancel_signaling() to stop reporting when
a request is completed via an asynchronous signal, we remove that request
from the breadcrumb wait queue. However, we may be concurrently
processing that request in the signaler itself, the actual operations on
the request's node itself are serialised but we do not actually clear the
waiter after removing it from the tree allowing both parties to attempt
to do so and corrupting the rbtree. (Previously removing from the
breadcrumb wait queue could only be done on behalf of i915_wait_request,
so this race could not happen).
Reported-by: "He, Bo" <bo.he@intel.com>
Fixes: 9eb143bbec ("drm/i915: Allow a request to be cancelled")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: "He, Bo" <bo.he@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171115121458.24655-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit c534612e78)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
An earlier fix changed the return type from find_bb_size however the
integer return is being assigned to a unsigned int so the -ve error
check will never be detected. Make bb_size an int to fix this.
Detected by CoverityScan CID#1456886 ("Unsigned compared against 0")
Fixes: 1e3197d6ad ("drm/i915/gvt: Refine error handling for perform_bb_shadow")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
(cherry picked from commit 24f8a29af4)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
intel_uncore_suspend() unregisters the uncore code's PMIC bus access
notifier and gets called on both normal and runtime suspend.
intel_uncore_resume_early() re-registers the notifier, but only on
normal resume. Add a new intel_uncore_runtime_resume() function which
only re-registers the notifier and call that on runtime resume.
Cc: stable@vger.kernel.org
Reported-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171114135518.15981-2-hdegoede@redhat.com
(cherry picked from commit bedf4d79c3)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
assert_rpm_wakelock_held is triggered from i915_pmic_bus_access_notifier
even though it gets unregistered on (runtime) suspend, this is caused
by a race happening under the following circumstances:
intel_runtime_pm_put does:
atomic_dec(&dev_priv->pm.wakeref_count);
pm_runtime_mark_last_busy(kdev);
pm_runtime_put_autosuspend(kdev);
And pm_runtime_put_autosuspend calls intel_runtime_suspend from
a workqueue, so there is ample of time between the atomic_dec() and
intel_runtime_suspend() unregistering the notifier. If the notifier
gets called in this windowd assert_rpm_wakelock_held falsely triggers
(at this point we're not runtime-suspended yet).
This commit adds disable_rpm_wakeref_asserts and
enable_rpm_wakeref_asserts calls around the
intel_uncore_forcewake_get(FORCEWAKE_ALL) call in
i915_pmic_bus_access_notifier fixing the false-positive WARN_ON.
Changes in v2:
-Reword comment explaining why disabling the wakeref asserts is
ok and necessary
Cc: stable@vger.kernel.org
Reported-by: FKr <bugs-freedesktop@ubermail.me>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171110150301.9601-2-hdegoede@redhat.com
(cherry picked from commit ce30560c80)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
write() is marked as having a must-check return value. Check it and
abort if we fail to write an error message from a signal handler.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171111001232.94813E58@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
'si_pkey' is now #defined to be the name of the new siginfo field that
protection keys uses. Rename it not to conflict.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171111001231.DFFC8285@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The MPX hardware data structurse are defined in a weird way: they define
their size in bytes and then union that with the type with which we want
to access them.
Yes, this is weird, but it does work. But, new GCC's complain that we
are accessing the array out of bounds. Just make it a zero-sized array
so gcc will stop complaining. There was not really a bug here.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171111001229.58A7933D@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Now that CPUs that implement Memory Protection Keys are publicly
available we can be a bit less oblique about where it is available.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171111001228.DC748A10@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Trivial fix to spelling mistake in comment and also with text in
audit_resource call.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: John Johansen <john.johansen@canonical.com>
It doesn't cause a run-time bug, but these bitfields should be unsigned.
When it's signed ->dl_throttled is set to either 0 or -1, instead of
0 and 1 as expected.
The sched.h file is included into tons of places so Sparse generates
a flood of warnings like this:
./include/linux/sched.h:477:54: error: dubious one-bit signed bitfield
Reported-by: Matthew Wilcox <willy@infradead.org>
Reported-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Luca Abeni <luca.abeni@santannapisa.it>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kernel-janitors@vger.kernel.org
Cc: luca abeni <luca.abeni@santannapisa.it>
Link: http://lkml.kernel.org/r/20171013070121.dzcncojuj2f4utij@mwanda
Signed-off-by: Ingo Molnar <mingo@kernel.org>
- convert timers to use timer_setup() (Kees Cook, Thierry Reding)
- fix panels support on iMX boards in mxsfb driver (Stefan Agner)
- fix timeout on EDID read in udlfb driver (Ladislav Michl)
- add missing modes to fix out of bounds access in controlfb driver
(Geert Uytterhoeven)
- update initialisation paths in sa1100fb driver to be more robust
(Russell King)
- fix error handling path of ->probe method in au1200fb driver
(Christophe JAILLET)
- fix handling of cases when either panel or crt is defined in sm501fb
driver (Sudip Mukherjee, Colin Ian King)
- add ability to the Goldfish FB driver to be recognized by OS via DT
(Aleksandar Markovic)
- structures constifications (Bhumika Goyal)
- misc fixes (Allen Pais, Gustavo A. R. Silva, Dan Carpenter)
- misc cleanups (Colin Ian King, Himanshu Jha, Markus Elfring)
- remove dead igafb driver
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Merge tag 'fbdev-v4.15' of git://github.com/bzolnier/linux
Pull fbdev updates from Bartlomiej Zolnierkiewicz:
"There is nothing really major here (though removal of the dead igafb
driver stands out in diffstat).
Summary:
- convert timers to use timer_setup() (Kees Cook, Thierry Reding)
- fix panels support on iMX boards in mxsfb driver (Stefan Agner)
- fix timeout on EDID read in udlfb driver (Ladislav Michl)
- add missing modes to fix out of bounds access in controlfb driver
(Geert Uytterhoeven)
- update initialisation paths in sa1100fb driver to be more robust
(Russell King)
- fix error handling path of ->probe method in au1200fb driver
(Christophe JAILLET)
- fix handling of cases when either panel or crt is defined in
sm501fb driver (Sudip Mukherjee, Colin Ian King)
- add ability to the Goldfish FB driver to be recognized by OS via DT
(Aleksandar Markovic)
- structures constifications (Bhumika Goyal)
- misc fixes (Allen Pais, Gustavo A. R. Silva, Dan Carpenter)
- misc cleanups (Colin Ian King, Himanshu Jha, Markus Elfring)
- remove dead igafb driver"
* tag 'fbdev-v4.15' of git://github.com/bzolnier/linux: (42 commits)
OMAPFB: prevent buffer underflow in omapfb_parse_vram_param()
video: fbdev: sm501fb: fix potential null pointer dereference on fbi
fbcon: Initialize ops->info early
video: fbdev: Convert timers to use timer_setup()
video: fbdev: pxa3xx_gcu: Convert timers to use timer_setup()
fbdev: controlfb: Add missing modes to fix out of bounds access
video: fbdev: sis_main: mark expected switch fall-throughs
video: fbdev: cirrusfb: mark expected switch fall-throughs
video: fbdev: aty: radeon_pm: mark expected switch fall-throughs
video: fbdev: sm501fb: mark expected switch fall-through in sm501fb_blank_crt
video: fbdev: intelfb: remove redundant variables
video/fbdev/dnfb: Use common error handling code in dnfb_probe()
sm501fb: suspend and resume fb if it exists
sm501fb: unregister framebuffer only if registered
sm501fb: deallocate colormap only if allocated
video: goldfishfb: Add support for device tree bindings
Documentation: Add device tree binding for Goldfish FB driver
video: udlfb: Fix read EDID timeout
video: fbdev: remove dead igafb driver
video: fbdev: mxsfb: fix pixelclock polarity
...
Print a rate-limited warning when a user-space program attempts to execute
any of the instructions that UMIP protects (i.e., SGDT, SIDT, SLDT, STR
and SMSW).
This is useful, because when CONFIG_X86_INTEL_UMIP=y is selected and
supported by the hardware, user space programs that try to execute such
instructions will receive a SIGSEGV signal that they might not expect.
In the specific cases for which emulation is provided (instructions SGDT,
SIDT and SMSW in protected and virtual-8086 modes), no signal is
generated. However, a warning is helpful to encourage updates in such
programs to avoid the use of such instructions.
Warnings are printed via a customized printk() function that also provides
information about the program that attempted to use the affected
instructions.
Utility macros are defined to wrap umip_printk() for the error and warning
kernel log levels.
While here, replace an existing call to the generic rate-limited pr_err()
with the new umip_pr_err().
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: ricardo.neri@intel.com
Link: http://lkml.kernel.org/r/1511233476-17088-1-git-send-email-ricardo.neri-calderon@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
The function checks non-powerplay structures so regressed when
the pp_enabled check was removed. This should ideally be
implemented similarly for powerplay.
Fixes: 6d07fe7bca ("drm/amdgpu: delete pp_enable in adev")
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
As part of the scsi EH path, aacraid performs a reinitialization of the
adapter, which encompass freeing resources and IRQs, NULLifying lots of
pointers, and then initialize it all over again. We've identified a
problem during the free IRQ portion of this path if CONFIG_DEBUG_SHIRQ
is enabled on kernel config file.
Happens that, in case this flag was set, right after free_irq()
effectively clears the interrupt, it checks if it was requested as
IRQF_SHARED. In positive case, it performs another call to the IRQ
handler on driver. Problem is: since aacraid currently free some
resources *before* freeing the IRQ, once free_irq() path calls the
handler again (due to CONFIG_DEBUG_SHIRQ), aacraid crashes due to NULL
pointer dereference with the following trace:
aac_src_intr_message+0xf8/0x740 [aacraid]
__free_irq+0x33c/0x4a0
free_irq+0x78/0xb0
aac_free_irq+0x13c/0x150 [aacraid]
aac_reset_adapter+0x2e8/0x970 [aacraid]
aac_eh_reset+0x3a8/0x5d0 [aacraid]
scsi_try_host_reset+0x74/0x180
scsi_eh_ready_devs+0xc70/0x1510
scsi_error_handler+0x624/0xa20
This patch prevents the crash by changing the order of the
deinitialization in this path of aacraid: first we clear the IRQ, then
we free other resources. No functional change intended.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Reviewed-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Currently the driver accepts two ways of requesting an initialization
reset on the adapter: by passing aac_reset_devices module parameter,
or the generic kernel parameter reset_devices.
It's working as intended...but if we end up reaching a scsi hang and
the scsi EH mechanism takes place, aacraid performs resets as part of
the scsi error recovery procedure. These EH routines might reinitialize
the device, and if we have provided some of the reset parameters in the
kernel command-line, we again perform an "initialization" reset.
So, to avoid this duplication of resets in case of scsi EH path, this
patch adds a field to aac_dev struct to keep per-adapter track of the
init reset request - once it's done, we set it to false and don't
proactively reset anymore in case of reinitializations.
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Reviewed-by: Raghava Aditya Renukunta <RaghavaAditya.Renukunta@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Commit 16ae9dd35d ("scsi: aacraid: Fix for excessive prints on EEH")
introduced checks about the state of device before any PCI operations in
the driver. Basically, this prevents it to perform PCI accesses when
device is in the process of recover from a PCI error. In PowerPC, such
mechanism is called EEH, and the aforementioned commit introduced checks
that are based on EEH-specific primitives for that.
The potential problems with this approach are three: first, these checks
are "locked" to powerpc only - another archs could have error recovery
methods too, like AER in Intel. Also, the powerpc primitives perform
expensive FW accesses to validate the precise PCI state of a device.
Finally, code becomes more complicated and needs ifdef validation based
on arch config being set.
So, this patch makes use of generic PCI state checks, which are
lightweight and non-dependent of arch configs - also, it makes the code
cleaner.
Fixes: 16ae9dd35d ("scsi: aacraid: Fix for excessive prints on EEH")
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Reviewed-by: Dave Carroll <david.carroll@microsemi.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Jakub Kicinski says:
====================
This series addresses some late comments and moves checking if program
has been loaded for the correct device to the drivers. There are also
some problems with net namespaces which I didn't take into consideration.
On the kernel side we will now simply ignore namespace moves. Since the
user space API is not reporting any namespace identification we have to
remove the ifindex until a correct way of reporting is agreed upon.
v2:
- fix ext ack reporting for XDP (David A);
- add Jiri's Ack.
====================
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Header implementation of bpf_prog_offload_verifier_prep() which
is used if CONFIG_NET=n should be a static inline.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This reverts commit bd601b6ada ("bpf: report offload info to user
space"). The ifindex by itself is not sufficient, we should provide
information on which network namespace this ifindex belongs to.
After considering some options we concluded that it's best to just
remove this API for now, and rework it in -next.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This reverts commit 928631e054 ("bpftool: print program device bound
info"). We will remove this API and redo it right in -next.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
We are currently destroying the device offload state when device
moves to another net namespace. This doesn't break with current
NFP code, because offload state is not used on program removal,
but it's not correct behaviour.
Ignore the device unregister notifications on namespace move.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
bpf_prog_get_type() is identical to bpf_prog_get_type_dev(),
with false passed as attach_drv. Instead of keeping it as
an exported symbol turn it into static inline wrapper.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Currently device-bound programs are not able to run on the host
to save resources (host JIT is not invoked). Don't allow XDP
programs to be attached without the HW_MODE flag. In theory
if program is already translated for device offload the driver
should choose to offload it instead of loading it in the driver.
However, offloading translated program may still fail resulting
in device-bound program being run on the host.
Prevent this by refusing to attach device bound programs if
XDP_FLAGS_HW_MODE is not set.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
With TC shared block changes we can't depend on correct netdev
pointer being available in cls_bpf. Move the device validation
to the driver. Core will only make sure that offloaded programs
are always attached in the driver (or in HW by the driver). We
trust that drivers which implement offload callbacks will perform
necessary checks.
Moving the checks to the driver is generally a useful thing,
in practice the check should be against a switchdev instance,
not a netdev, given that most ASICs will probably allow using
the same program on many ports.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
