SeongJae Park ffe4a1ba1a mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()' ... commit ebb3f994dd upstream. DAMON debugfs interface increases the reference counts of 'struct pid's for targets from the 'target_ids' file write callback ('dbgfs_target_ids_write()'), but decreases the counts only in DAMON monitoring termination callback ('dbgfs_before_terminate()'). Therefore, when 'target_ids' file is repeatedly written without DAMON monitoring start/termination, the reference count is not decreased and therefore memory for the 'struct pid' cannot be freed. This commit fixes this issue by decreasing the reference counts when 'target_ids' is written. Link: https://lkml.kernel.org/r/20211229124029.23348-1-sj@kernel.org Fixes: 4bc05954d0 ("mm/damon: implement a debugfs-based user space interface") Signed-off-by: SeongJae Park <sj@kernel.org> Cc: <stable@vger.kernel.org> [5.15+] 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>		2022-01-05 12:42:39 +01:00
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Kconfig	mm/damon: add kunit tests	2021-09-08 11:50:25 -07:00
Makefile	mm/damon: implement a debugfs-based user space interface	2021-09-08 11:50:24 -07:00
core-test.h	mm/damon/core-test: fix wrong expectations for 'damon_split_regions_of()'	2021-10-28 17:18:55 -07:00
core.c	mm/damon/core: fix fake load reports due to uninterruptible sleeps	2021-12-14 10:57:11 +01:00
dbgfs-test.h	mm/damon: don't use strnlen() with known-bogus source length	2021-09-24 16:13:34 -07:00
dbgfs.c	mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()'	2022-01-05 12:42:39 +01:00
vaddr-test.h	mm/damon: add kunit tests	2021-09-08 11:50:25 -07:00
vaddr.c	mm/damon: add kunit tests	2021-09-08 11:50:25 -07:00