6.18-stable review patch. If anyone has any objections, please let me know.
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From: Ran Xiaokai ran.xiaokai@zte.com.cn
commit a76a5ae2c6c645005672c2caf2d49361c6f2500f upstream.
The page_owner_stack_fops->open() callback invokes seq_open_private(), therefore its corresponding ->release() callback must call seq_release_private(). Otherwise it will cause a memory leak of struct stack_print_ctx.
Link: https://lkml.kernel.org/r/20251219074232.136482-1-ranxiaokai627@163.com Fixes: 765973a09803 ("mm,page_owner: display all stacks and their count") Signed-off-by: Ran Xiaokai ran.xiaokai@zte.com.cn Acked-by: Michal Hocko mhocko@suse.com Acked-by: Vlastimil Babka vbabka@suse.cz Cc: Andrey Konovalov andreyknvl@gmail.com Cc: Brendan Jackman jackmanb@google.com Cc: Johannes Weiner hannes@cmpxchg.org Cc: Marco Elver elver@google.com Cc: Suren Baghdasaryan surenb@google.com Cc: Zi Yan ziy@nvidia.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- mm/page_owner.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/page_owner.c +++ b/mm/page_owner.c @@ -936,7 +936,7 @@ static const struct file_operations page .open = page_owner_stack_open, .read = seq_read, .llseek = seq_lseek, - .release = seq_release, + .release = seq_release_private, };
static int page_owner_threshold_get(void *data, u64 *val)