diff options
| author | SeongJae Park <sj@kernel.org> | 2023-07-29 23:37:32 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-04 23:03:43 +0300 |
| commit | 5f1fc67f2cb8d3035d3acd273b48b97835af8afd (patch) | |
| tree | 9410215fff8219d52a03761c4d2350d0b927f6fa /mm/damon | |
| parent | f8654743a0e6909dc634cbfad6db6816f10f3399 (diff) | |
| download | linux-5f1fc67f2cb8d3035d3acd273b48b97835af8afd.tar.xz | |
mm/damon/core: initialize damo_filter->list from damos_new_filter()
damos_new_filter() is not initializing the list field of newly allocated
filter object. However, DAMON sysfs interface and DAMON_RECLAIM are not
initializing it after calling damos_new_filter(). As a result, accessing
uninitialized memory is possible. Actually, adding multiple DAMOS filters
via DAMON sysfs interface caused NULL pointer dereferencing. Initialize
the field just after the allocation from damos_new_filter().
Link: https://lkml.kernel.org/r/20230729203733.38949-2-sj@kernel.org
Fixes: 98def236f63c ("mm/damon/core: implement damos filter")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon')
| -rw-r--r-- | mm/damon/core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/damon/core.c b/mm/damon/core.c index 91cff7f2997e..eb9580942a5c 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -273,6 +273,7 @@ struct damos_filter *damos_new_filter(enum damos_filter_type type, return NULL; filter->type = type; filter->matching = matching; + INIT_LIST_HEAD(&filter->list); return filter; } |