c3939031fb
DAMON debugfs interface iterates current monitoring targets in 'dbgfs_target_ids_read()' while holding the corresponding 'kdamond_lock'. However, it also destructs the monitoring targets in 'dbgfs_before_terminate()' without holding the lock. This can result in a use_after_free bug. This commit avoids the race by protecting the destruction with the corresponding 'kdamond_lock'. Link: https://lkml.kernel.org/r/20211221094447.2241-1-sj@kernel.org Reported-by: Sangwoo Bae <sangwoob@amazon.com> Fixes: 4bc05954d007 ("mm/damon: implement a debugfs-based user space interface") Signed-off-by: SeongJae Park <sj@kernel.org> Cc: <stable@vger.kernel.org> [5.15.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> (cherry picked from commit 34796417964b8d0aef45a99cf6c2d20cebe33733) Bug: 228223814 Signed-off-by: Hailong Tu <tuhailong@oppo.com> Change-Id: I27e10c0e1ccc6c28c5a948a246e45db7a0338bed |
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| .. | ||
| core-test.h | ||
| core.c | ||
| dbgfs-test.h | ||
| dbgfs.c | ||
| Kconfig | ||
| Makefile | ||
| paddr.c | ||
| prmtv-common.c | ||
| prmtv-common.h | ||
| reclaim.c | ||
| vaddr-test.h | ||
| vaddr.c | ||