linux-brain/Documentation
Kees Cook c0837e021d mm/slub: clarify verification reporting
commit 8669dbab2ae56085c128894b181c2aa50f97e368 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-06-23 14:41:30 +02:00
..
ABI iio: improve IIO_CONCENTRATION channel type description 2020-08-19 08:16:07 +02:00
EDID docs: driver-api: add a series of orphaned documents 2019-07-15 11:03:02 -03:00
PCI Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2019-08-27 14:23:31 -07:00
RCU Merge branches 'consolidate.2019.08.01b', 'fixes.2019.08.12a', 'lists.2019.08.13a' and 'torture.2019.08.01b' into HEAD 2019-08-13 14:30:30 -07:00
accounting docs: add some documentation dirs to the driver-api book 2019-07-15 11:03:02 -03:00
admin-guide dm integrity: conditionally disable "recalculate" feature 2021-01-30 13:54:10 +01:00
arm ARM: 9012/1: move device tree mapping out of linear region 2021-05-19 10:08:32 +02:00
arm64 arm64: errata: Hide CTR_EL0.DIC on systems affected by Neoverse-N1 #1542419 2020-04-29 16:32:56 +02:00
block docs: block: null_blk: enhance document style 2019-09-11 16:04:22 -06:00
bpf bpf/flow_dissector: document flags 2019-07-25 18:00:41 -07:00
cdrom docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
core-api XArray: add xas_split 2021-06-10 13:37:14 +02:00
cpu-freq Documentation: cpufreq: Update policy notifier documentation 2019-09-02 22:44:05 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-09-18 12:11:14 -07:00
dev-tools mm, page_owner: decouple freeing stack trace from debug_pagealloc 2019-10-14 15:04:00 -07:00
devicetree dt-bindings: net: ethernet-controller: fix typo in NVMEM 2021-04-14 08:24:18 +02:00
doc-guide docs: remove extra conf.py files 2019-07-17 06:57:52 -03:00
driver-api ata: make qc_prep return ata_completion_errors 2020-10-01 13:18:26 +02:00
fault-injection docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
fb fbdev: fix numbering of fbcon options 2020-02-24 08:36:42 +01:00
features It's a somewhat calmer cycle for docs this time, as the churn of the mass 2019-09-17 16:22:26 -07:00
filesystems sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output 2021-03-07 12:20:48 +01:00
firmware-guide Documentation: ACPI: DSD: Convert LED documentation to ReST 2019-08-20 23:53:46 +02:00
firmware_class
fpga Documentation: fpga: dfl: add descriptions for virtualization and new interfaces. 2019-09-03 19:35:42 -07:00
gpu Merge drm/drm-next into drm-intel-next-queued 2019-08-22 00:10:36 -07:00
hid docs: add some documentation dirs to the driver-api book 2019-07-15 11:03:02 -03:00
hwmon hwmon: docs: Extend inspur-ipsps1 title underline 2019-10-07 05:56:57 -07:00
i2c docs: i2c: convert to ReST and add to driver-api bookset 2019-07-31 13:25:27 -06:00
ia64 docs: add SPDX tags to new index files 2019-07-15 11:03:03 -03:00
ide docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
iio docs: add some documentation dirs to the driver-api book 2019-07-15 11:03:02 -03:00
infiniband Documentation/infiniband: update name of some functions 2019-09-13 16:55:55 -03:00
input Input: docs: fix spelling mistake "potocol" -> "protocol" 2019-08-06 11:24:49 -06:00
ioctl fs-verity: add UAPI header 2019-07-28 16:59:16 -07:00
isdn docs: isdn: convert to ReST and add to kAPI bookset 2019-07-31 13:30:25 -06:00
kbuild kbuild: support LLVM=1 to switch the default tools to Clang/LLVM 2020-08-26 10:40:47 +02:00
kernel-hacking docs: Add documentation for Symbol Namespaces 2019-09-10 10:30:49 +02:00
leds leds: core: Add support for composing LED class device names 2019-07-25 20:07:52 +02:00
livepatch docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
locking doc🔒 remove reference to clever use of read-write lock 2019-09-14 01:53:27 -06:00
m68k docs: README.buddha: convert to ReST and add to m68k book 2019-07-31 13:30:10 -06:00
maintainer docs: Fix typo on pull requests guide 2019-08-12 15:14:14 -06:00
media media: videodev2.h: RGB BT2020 and HSV are always full range 2020-11-05 11:43:15 +01:00
mic docs: driver-api: add remaining converted dirs to it 2019-07-15 11:03:03 -03:00
mips Main MIPS changes for v5.4: 2019-09-22 09:30:30 -07:00
misc-devices Docs: misc: xilinx_sdfec: Add documentation 2019-08-15 17:54:38 +02:00
netlabel docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
networking can: j1939: swap addr and pgn in the send example 2020-11-18 19:20:19 +01:00
nios2 docs: nios2: add it to the main Documentation body 2019-07-31 13:31:51 -06:00
openrisc docs: openrisc: convert to ReST and add to documentation body 2019-07-31 13:30:20 -06:00
parisc docs: parisc: convert to ReST and add to documentation body 2019-07-31 13:30:15 -06:00
pcmcia docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
power Merge branches 'pm-opp', 'pm-qos', 'acpi-pm', 'pm-domains' and 'pm-tools' 2019-09-17 09:49:19 +02:00
powerpc docs: powerpc: Add missing documentation reference 2019-09-17 23:59:34 +10:00
process Documentation/process: Add fallthrough pseudo-keyword 2019-10-11 09:26:05 -07:00
riscv It's a somewhat calmer cycle for docs this time, as the churn of the mass 2019-09-17 16:22:26 -07:00
s390 Documentation/s390: remove outdated debugging390 documentation 2019-08-21 12:41:43 +02:00
scheduler sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices 2019-08-08 09:09:30 +02:00
scsi scsi: smartpqi: Update attribute name to `driver_version` 2020-01-17 19:48:27 +01:00
security Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity 2019-09-27 19:37:27 -07:00
sh docs: remove extra conf.py files 2019-07-17 06:57:52 -03:00
sound ALSA: hda/realtek - Remove now-unnecessary XPS 13 headphone noise fixups 2020-04-17 10:50:08 +02:00
sparc docs: add arch doc directories to the index 2019-07-15 11:03:01 -03:00
sphinx tweewide: Fix most Shebang lines 2021-05-22 11:38:30 +02:00
sphinx-static
spi spi: docs: convert to ReST and add it to the kABI bookset 2019-07-31 14:13:13 -06:00
target tweewide: Fix most Shebang lines 2021-05-22 11:38:30 +02:00
timers docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
trace tweewide: Fix most Shebang lines 2021-05-22 11:38:30 +02:00
translations doc: arm64: fix grammar dtb placed in no attributes region 2019-09-06 08:44:34 -06:00
usb USB: rio500: Remove Rio 500 kernel driver 2019-10-04 10:53:36 +02:00
userspace-api Documentation: seccomp: Fix user notification documentation 2021-06-03 08:59:03 +02:00
virt KVM: arm64: Reject VM creation when the default IPA size is unsupported 2021-03-17 17:03:57 +01:00
virtual cpuidle: add haltpoll governor 2019-07-30 17:27:37 +02:00
vm mm/slub: clarify verification reporting 2021-06-23 14:41:30 +02:00
w1 docs: w1: convert to ReST and add to the kAPI group of docs 2019-07-31 14:16:17 -06:00
watchdog linux-watchdog 5.4-rc1 tag 2019-09-27 11:17:38 -07:00
x86 x86/CPU/AMD: Save AMD NodeId as cpu_die_id 2020-12-30 11:51:47 +01:00
xtensa xtensa: fix TLBTEMP area placement 2020-11-24 13:29:22 +01:00
.gitignore
COPYING-logo docs: logo.txt: rename it to COPYING-logo 2019-07-15 09:20:27 -03:00
Changes
CodingStyle
DMA-API-HOWTO.txt docs: DMA-API-HOWTO.txt: fix an unmarked code block 2019-07-15 09:20:24 -03:00
DMA-API.txt dma-mapping: remove dma_release_declared_memory 2019-09-04 11:13:19 +02:00
DMA-ISA-LPC.txt
DMA-attributes.txt
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
Kconfig docs: Kbuild/Makefile: allow check for missing docs at build time 2019-06-07 11:33:16 -06:00
Makefile docs: Kbuild/Makefile: allow check for missing docs at build time 2019-06-07 11:33:16 -06:00
SubmittingPatches
asm-annotations.rst linkage: Introduce new macros for assembler symbols 2020-11-10 12:37:24 +01:00
atomic_bitops.txt docs: atomic_bitops.txt: add a title for this document 2019-04-11 12:37:02 -06:00
atomic_t.txt Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 16:12:03 -07:00
bus-virt-phys-mapping.txt
conf.py docs: conf.py: only use CJK if the font is available 2019-07-17 06:57:51 -03:00
crc32.txt
debugging-modules.txt
debugging-via-ohci1394.txt
digsig.txt
docutils.conf doc-rst: Add missing newline at end of file 2019-06-20 14:16:56 -06:00
dontdiff kbuild: create *.mod with full directory path and remove MODVERDIR 2019-07-18 02:19:31 +09:00
futex-requeue-pi.txt
hwspinlock.txt hwspinlock: add the 'in_atomic' API 2019-06-29 21:08:14 -07:00
index.rst linkage: Introduce new macros for assembler symbols 2020-11-10 12:37:24 +01:00
io-mapping.txt
io_ordering.txt
irqflags-tracing.txt
kobject.txt
kprobes.txt Merge branch 'parisc-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2019-05-07 19:34:17 -07:00
kref.txt
logo.gif
lzo.txt lib/lzo: fix ambiguous encoding bug in lzo-rle 2020-06-17 16:40:28 +02:00
mailbox.txt
memory-barriers.txt docs: fix broken doc references due to renames 2019-07-17 06:57:51 -03:00
nommu-mmap.txt
padata.txt padata: allocate workqueue internally 2019-09-13 21:15:39 +10:00
percpu-rw-semaphore.txt
pi-futex.txt docs: locking: convert docs to ReST and rename to *.rst 2019-07-15 08:53:27 -03:00
preempt-locking.txt x86/fpu: Remove fpu__restore() 2019-04-09 19:27:42 +02:00
rbtree.txt docs: rbtree.txt: fix Sphinx build warnings 2019-07-15 09:20:24 -03:00
remoteproc.txt remoteproc: add vendor resources handling 2019-06-29 12:02:17 -07:00
robust-futex-ABI.txt
robust-futexes.txt futex: Update comments and docs about return values of arch futex code 2019-04-26 13:57:55 +01:00
rpmsg.txt
speculation.txt docs: speculation.txt: mark example blocks as such 2019-04-11 12:37:03 -06:00
static-keys.txt
tee.txt Documentation: tee: Grammar s/the its/its/ 2019-06-07 11:23:38 -06:00
this_cpu_ops.txt
unaligned-memory-access.txt docs: unaligned-memory-access.txt: use a lowercase title 2019-04-11 12:37:03 -06:00
xz.txt