linux/Documentation
Kees Cook 8669dbab2a mm/slub: clarify verification reporting
Patch series "Actually fix freelist pointer vs redzoning", v4.

This fixes redzoning vs the freelist pointer (both for middle-position
and very small caches).  Both are "theoretical" fixes, in that I see no
evidence of such small-sized caches actually be used in the kernel, but
that's no reason to let the bugs continue to exist, especially since
people doing local development keep tripping over it.  :)

This patch (of 3):

Instead of repeating "Redzone" and "Poison", clarify which sides of
those zones got tripped.  Additionally fix column alignment in the
trailer.

Before:

  BUG test (Tainted: G    B            ): Redzone overwritten
  ...
  Redzone (____ptrval____): bb bb bb bb bb bb bb bb      ........
  Object (____ptrval____): f6 f4 a5 40 1d e8            ...@..
  Redzone (____ptrval____): 1a aa                        ..
  Padding (____ptrval____): 00 00 00 00 00 00 00 00      ........

After:

  BUG test (Tainted: G    B            ): Right Redzone overwritten
  ...
  Redzone  (____ptrval____): bb bb bb bb bb bb bb bb      ........
  Object   (____ptrval____): f6 f4 a5 40 1d e8            ...@..
  Redzone  (____ptrval____): 1a aa                        ..
  Padding  (____ptrval____): 00 00 00 00 00 00 00 00      ........

The earlier commits that slowly resulted in the "Before" reporting were:

  d86bd1bece ("mm/slub: support left redzone")
  ffc79d2880 ("slub: use print_hex_dump")
  2492268472 ("SLUB: change error reporting format to follow lockdep loosely")

Link: https://lkml.kernel.org/r/20210608183955.280836-1-keescook@chromium.org
Link: https://lkml.kernel.org/r/20210608183955.280836-2-keescook@chromium.org
Link: https://lore.kernel.org/lkml/cfdb11d7-fb8e-e578-c939-f7f5fb69a6bd@suse.cz/
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Marco Elver <elver@google.com>
Cc: "Lin, Zhenpeng" <zplin@psu.edu>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-06-16 09:24:42 -07:00
..
ABI libnvdimm fixes for 5.13-rc2 2021-05-15 08:32:51 -07:00
accounting
admin-guide Networking fixes for 5.13-rc4, including fixes from bpf, netfilter, 2021-05-26 17:44:49 -10:00
arm It's been a relatively busy cycle in docsland, though more than usually 2021-04-26 13:22:43 -07:00
arm64 Assorted arm64 fixes and clean-ups, the most important: 2021-05-07 12:11:05 -07:00
block Documentation: drop optional BOMs 2021-05-10 15:17:34 -06:00
bpf bpf: Document the pahole release info related to libbpf in bpf_devel_QA.rst 2021-04-23 17:11:58 -07:00
cdrom docs: cdrom-standard.rst: get rid of uneeded UTF-8 chars 2021-05-11 11:00:17 -06:00
core-api A few late-arriving documentation fixes, including some oprofile cleanup, a 2021-05-06 08:33:54 -07:00
cpu-freq
crypto
dev-tools scripts/gdb: add lx_current support for arm64 2021-05-07 00:26:33 -07:00
devicetree USB fixes for 5.13-rc6 2021-06-12 12:34:49 -07:00
doc-guide
driver-api usb: Restore the usb_header label 2021-05-21 14:41:37 +02:00
fault-injection
fb Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
features powerpc updates for 5.13 2021-04-30 12:22:28 -07:00
filesystems erofs: update documentation about data compression 2021-05-11 16:47:15 +08:00
firmware_class
firmware-guide Documentation: firmware-guide: gpio-properties: Add note to SPI CS case 2021-04-28 19:11:13 +02:00
fpga
gpu drm-misc-next for 5.13: 2021-04-07 17:32:12 +10:00
hid Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
hwmon docs: hwmon: tmp103.rst: fix bad usage of UTF-8 chars 2021-05-11 11:00:18 -06:00
i2c
ia64
ide
iio
infiniband
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2021-05-06 23:37:55 -07:00
isdn
kbuild Kconfig updates for v5.13 2021-04-29 14:32:00 -07:00
kernel-hacking
leds Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
litmus-tests
livepatch
locking
m68k
maintainer
mhi
mips
misc-devices dw-xdata-pcie: Update outdated info and improve text format 2021-04-14 19:47:28 +02:00
netlabel
networking docs: networking: device_drivers: fix bad usage of UTF-8 chars 2021-05-11 11:00:18 -06:00
nios2
nvdimm
openrisc
parisc
PCI
pcmcia
power power supply and reset changes for the v5.13 series 2021-04-28 15:43:58 -07:00
powerpc powerpc/64s/syscall: Use pt_regs.trap to distinguish syscall ABI difference between sc and scv syscalls 2021-05-21 00:58:03 +10:00
process Documentation: drop optional BOMs 2021-05-10 15:17:34 -06:00
RCU
riscv Documentation: riscv: Add documentation that describes the VM layout 2021-04-26 08:25:05 -07:00
s390 s390/pci: expose UID uniqueness guarantee 2021-04-05 11:30:57 +02:00
scheduler sched,doc: sched_debug_verbose cmdline should be sched_verbose 2021-05-06 15:33:26 +02:00
scsi for-5.13/block-2021-04-27 2021-04-28 14:27:12 -07:00
security Documentation: drop optional BOMs 2021-05-10 15:17:34 -06:00
sh
sound
sparc
sphinx
sphinx-static
spi spi: Updates for v5.13 2021-04-26 16:32:11 -07:00
staging
target
timers Documentation: drop optional BOMs 2021-05-10 15:17:34 -06:00
trace Documentation: trace: Add documentation for TRBE 2021-04-06 16:05:38 -06:00
translations docs/zh_CN: Remove obsolete translation file 2021-05-10 15:14:31 -06:00
usb USB fixes for 5.13-rc2 2021-05-16 09:55:05 -07:00
userspace-api Documentation: seccomp: Fix user notification documentation 2021-05-28 09:54:12 -07:00
virt Bugfixes, including a TLB flush fix that affects processors 2021-06-09 13:09:57 -07:00
vm mm/slub: clarify verification reporting 2021-06-16 09:24:42 -07:00
w1
watchdog
x86 x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG 2021-05-10 07:51:38 +02:00
xtensa
.gitignore
arch.rst
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py
COPYING-logo
docutils.conf
dontdiff kbuild: generate Module.symvers only when vmlinux exists 2021-04-25 05:17:02 +09:00
index.rst
Kconfig
logo.gif
Makefile
memory-barriers.txt
SubmittingPatches
watch_queue.rst