SeongJae Park c5d5b0047b mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write ... commit 4f489fe6af upstream. memcg_path_store() assigns a newly allocated memory buffer to filter->memcg_path, without deallocating the previously allocated and assigned memory buffer. As a result, users can leak kernel memory by continuously writing a data to memcg_path DAMOS sysfs file. Fix the leak by deallocating the previously set memory buffer. Link: https://lkml.kernel.org/r/20250619183608.6647-2-sj@kernel.org Fixes: 7ee161f18b ("mm/damon/sysfs-schemes: implement filter directory") Signed-off-by: SeongJae Park <sj@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: <stable@vger.kernel.org> [6.3.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-07-06 11:01:38 +02:00
..
tests	mm/damon/vaddr: fix issue in damon_va_evenly_split_region()	2024-12-09 10:41:02 +01:00
core.c	mm/damon/core: fix new damon_target objects leaks on damon_commit_targets()	2025-01-09 13:33:52 +01:00
dbgfs.c	mm/damon: move kunit tests to tests/ subdirectory with _kunit suffix	2024-09-03 21:15:58 -07:00
Kconfig	mm/damon/Kconfig: update DAMON doc URL	2024-09-26 14:01:44 -07:00
lru_sort.c	Revert "mm/damon/lru_sort: adjust local variable to dynamic allocation"	2024-09-09 16:39:00 -07:00
Makefile
modules-common.c	mm/damon: update email of SeongJae	2023-12-20 14:48:13 -08:00
modules-common.h
ops-common.c	mm/damon/ops: have damon_get_folio return folio even for tail pages	2025-04-20 10:15:48 +02:00
ops-common.h	mm/damon/ops-common: atomically test and clear young on ptes and pmds	2023-06-09 16:25:55 -07:00
paddr.c	mm/damon/ops: have damon_get_folio return folio even for tail pages	2025-04-20 10:15:48 +02:00
reclaim.c	mm/damon/reclaim: remove unnecessary code for online tuning	2024-07-03 19:30:14 -07:00
sysfs-common.c
sysfs-common.h	mm/damon/sysfs-schemes: rename *_set_{schemes,scheme_filters,quota_score,schemes}()	2024-07-03 19:30:14 -07:00
sysfs-schemes.c	mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write	2025-07-06 11:01:38 +02:00
sysfs.c	mm/damon: move kunit tests to tests/ subdirectory with _kunit suffix	2024-09-03 21:15:58 -07:00
vaddr.c	mm/damon/vaddr: fix issue in damon_va_evenly_split_region()	2024-12-09 10:41:02 +01:00