Vlastimil Babka 060807f841 mm, slub: make remaining slub_debug related attributes read-only ... SLUB_DEBUG creates several files under /sys/kernel/slab/<cache>/ that can be read to check if the respective debugging options are enabled for given cache. Some options, namely sanity_checks, trace, and failslab can be also enabled and disabled at runtime by writing into the files. The runtime toggling is racy. Some options disable __CMPXCHG_DOUBLE when enabled, which means that in case of concurrent allocations, some can still use __CMPXCHG_DOUBLE and some not, leading to potential corruption. The s->flags field is also not updated or checked atomically. The simplest solution is to remove the runtime toggling. The extended slub_debug boot parameter syntax introduced by earlier patch should allow to fine-tune the debugging configuration during boot with same granularity. Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Roman Gushchin <guro@fb.com> Cc: Christoph Lameter <cl@linux.com> Cc: Jann Horn <jannh@google.com> Cc: Vijayanand Jitta <vjitta@codeaurora.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Pekka Enberg <penberg@kernel.org> Link: http://lkml.kernel.org/r/20200610163135.17364-5-vbabka@suse.cz Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-08-07 11:33:22 -07:00
..
ABI	Staging/IIO driver patches for 5.9-rc1	2020-08-06 14:36:13 -07:00
PCI	Documentation: PCI: pci.rst: drop doubled words	2020-07-05 14:39:44 -06:00
RCU	These are the latest RCU bits for v5.9:	2020-08-03 14:31:33 -07:00
accounting	…
admin-guide	mm, slub: extend slub_debug syntax for multiple blocks	2020-08-07 11:33:22 -07:00
arm	ARM development for 5.9-rc1:	2020-08-06 10:17:00 -07:00
arm64	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
block	for-5.9/drivers-20200803	2020-08-05 10:51:40 -07:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next	2020-08-05 20:13:21 -07:00
cdrom	cdrom: remove the unused cdrom_media_changed function	2020-07-08 16:20:01 -06:00
core-api	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
cpu-freq	…
crypto	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
dev-tools	linux-kselftest-kunit-5.9-rc1	2020-08-05 10:07:39 -07:00
devicetree	TTY/Serial patches for 5.9-rc1	2020-08-06 14:56:11 -07:00
doc-guide	A handful of late-arriving docs fixes, along with a patch changing a lot of	2020-06-10 14:12:15 -07:00
driver-api	TTY/Serial patches for 5.9-rc1	2020-08-06 14:56:11 -07:00
fault-injection	block: rename generic_make_request to submit_bio_noacct	2020-07-01 07:27:24 -06:00
fb	drm next for 5.9-rc1	2020-08-05 19:50:06 -07:00
features	Xtensa updates for v5.9:	2020-08-06 10:07:40 -07:00
filesystems	ocfs2: replace HTTP links with HTTPS ones	2020-08-07 11:33:22 -07:00
firmware-guide	ACPI: Replace HTTP links with HTTPS ones	2020-07-27 14:47:08 +02:00
firmware_class	…
fpga	Char/Misc driver patches for 5.9-rc1	2020-08-05 11:43:47 -07:00
gpu	drm next for 5.9-rc1	2020-08-05 19:50:06 -07:00
hid	docs: hid: Convert link to https	2020-07-13 11:26:37 -06:00
hwmon	hwmon updates for v5.9	2020-08-05 13:13:57 -07:00
i2c	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
ia64	docs: ia64: correct typo	2020-07-31 11:09:09 -06:00
ide	…
iio	…
infiniband	RDMA/core: Remove FMR device ops	2020-06-02 20:32:54 -03:00
input	…
isdn	…
kbuild	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
kernel-hacking	…
leds	LEDs changes for 5.9-rc1.	2020-08-05 19:24:27 -07:00
litmus-tests	Documentation/litmus-tests: Add note on herd7 7.56 in atomic litmus test	2020-06-29 12:05:18 -07:00
livepatch	…
locking	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
m68k	…
maintainer	Documentation: maintainer-entry-profile: eliminate duplicated word	2020-07-13 09:44:07 -06:00
mhi	…
mips	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
misc-devices	Documentation: misc/xilinx_sdfec: eliminate duplicated word	2020-07-13 09:44:07 -06:00
netlabel	…
networking	wireless-drivers-next patches for v5.9	2020-08-04 12:57:02 -07:00
nios2	…
nvdimm	…
openrisc	docs: openrisc: Replace HTTP links with HTTPS ones	2020-07-13 11:34:09 -06:00
parisc	…
pcmcia	…
power	Merge branches 'pm-sleep', 'pm-domains', 'powercap' and 'pm-tools'	2020-08-03 13:12:44 +02:00
powerpc	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
process	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
riscv	…
s390	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
scheduler	sched/doc: Factorize bits between sched-energy.rst & sched-capacity.rst	2020-08-01 09:19:43 +02:00
scsi	…
security	Documentation: security/keys: eliminate duplicated word	2020-07-13 09:45:03 -06:00
sh	docs: sh: convert register-banks.txt to ReST	2020-06-19 14:10:13 -06:00
sound	ASoC: Updates for v5.9	2020-08-03 14:41:43 +02:00
sparc	…
sphinx	Replace HTTP links with HTTPS ones: Documentation/sphinx/parse-headers.pl	2020-06-26 10:57:33 -06:00
sphinx-static	…
spi	SPI SUBSYSTEM: Replace HTTP links with HTTPS ones	2020-07-09 22:41:11 +01:00
staging	docs: staging/tee.rst: convert into definition list	2020-07-23 14:25:12 -06:00
target	doc: don't use deprecated "---help---" markers in target docs	2020-06-13 13:32:40 -07:00
timers	docs: timers: drop documentation about LB_BIAS	2020-07-23 14:32:44 -06:00
trace	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
translations	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
usb	USB: Replace HTTP links with HTTPS ones	2020-07-21 13:41:57 +02:00
userspace-api	Documentation: media: convert to use i2c_new_client_device()	2020-06-19 09:20:25 +02:00
virt	s390: implement diag318	2020-08-06 12:59:31 -07:00
vm	mm, slub: make remaining slub_debug related attributes read-only	2020-08-07 11:33:22 -07:00
w1	…
watchdog	…
x86	It's been a busy cycle for documentation - hopefully the busiest for a	2020-08-04 22:47:54 -07:00
xtensa	…
.gitignore	…
COPYING-logo	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
Changes	…
CodingStyle	…
Kconfig	…
Makefile	media updates for v5.8-rc1	2020-06-03 20:59:38 -07:00
SubmittingPatches	…
asm-annotations.rst	…
atomic_bitops.txt	…
atomic_t.txt	Documentation/litmus-tests/atomic: Add a test for smp_mb__after_atomic()	2020-06-29 12:05:18 -07:00
conf.py	Replace HTTP links with HTTPS ones: documentation	2020-06-08 09:30:19 -06:00
docutils.conf	…
dontdiff	Documentation: dontdiff: Add zstd compressed files	2020-07-31 11:51:10 +02:00
index.rst	docs: index.rst: Add watch_queue	2020-07-23 14:13:23 -06:00
logo.gif	…
memory-barriers.txt	Documentation/barriers: Remove references to [smp_]read_barrier_depends()	2020-07-21 10:50:36 +01:00
watch_queue.rst	…