SeongJae Park 6376a82459 mm/damon/core: make damon_start() waits until kdamond_fn() starts ... The cleanup tasks of kdamond threads including reset of corresponding DAMON context's ->kdamond field and decrease of global nr_running_ctxs counter is supposed to be executed by kdamond_fn(). However, commit 0f91d13366 ("mm/damon: simplify stop mechanism") made neither damon_start() nor damon_stop() ensure the corresponding kdamond has started the execution of kdamond_fn(). As a result, the cleanup can be skipped if damon_stop() is called fast enough after the previous damon_start(). Especially the skipped reset of ->kdamond could cause a use-after-free. Fix it by waiting for start of kdamond_fn() execution from damon_start(). Link: https://lkml.kernel.org/r/20231208175018.63880-1-sj@kernel.org Fixes: 0f91d13366 ("mm/damon: simplify stop mechanism") Signed-off-by: SeongJae Park <sj@kernel.org> Reported-by: Jakub Acs <acsjakub@amazon.de> Cc: Changbin Du <changbin.du@intel.com> Cc: Jakub Acs <acsjakub@amazon.de> Cc: <stable@vger.kernel.org> # 5.15.x Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2023-12-12 17:20:17 -08:00
..
acpi	ACPI: PM: Add acpi_device_fix_up_power_children() function	2023-11-20 17:31:49 +01:00
asm-generic	asm-generic: qspinlock: fix queued_spin_value_unlocked() implementation	2023-11-22 09:32:49 -08:00
clocksource
crypto	crypto: FIPS 202 SHA-3 register in hash info for IMA	2023-10-27 18:04:30 +08:00
drm	amd-drm-fixes-6.7-2023-11-30:	2023-12-01 13:57:11 +10:00
dt-bindings	linux-watchdog 6.7-rc1 tag	2023-11-09 13:54:25 -08:00
keys
kunit
kvm	KVM/arm64 updates for 6.7	2023-10-31 16:37:07 -04:00
linux	mm/damon/core: make damon_start() waits until kdamond_fn() starts	2023-12-12 17:20:17 -08:00
math-emu
media
memory
misc
net	wireless fixes:	2023-11-29 19:43:34 -08:00
pcmcia
ras
rdma
rv
scsi	scsi: sd: Fix system start for ATA devices	2023-11-24 20:44:21 -05:00
soc	IOMMU Updates for Linux v6.7	2023-11-09 13:37:28 -08:00
sound	ALSA: cs35l41: Fix for old systems which do not support command	2023-11-20 12:37:01 +01:00
target
trace	rxrpc: Fix RTT determination to use any ACK as a source	2023-11-17 02:50:33 +00:00
uapi	hardening fixes for v6.7-rc4	2023-12-01 14:17:54 +09:00
ufs
vdso
video	fbdev: stifb: Make the STI next font pointer a 32-bit signed offset	2023-10-30 14:54:41 +01:00
xen	xen/events: reduce externally visible helper functions	2023-11-14 09:29:28 +01:00