[PATCH v2 5/8] memcg: accounting for fasync_cache
STALE2028d
From: Vasily Averin <hidden>
Date: 2021-03-15 12:23:33
Subsystem:
file locking (flock() and fcntl()/lockf()), filesystems (vfs and infrastructure), the rest · Maintainers:
Jeff Layton, Chuck Lever, Alexander Viro, Christian Brauner, Linus Torvalds
unprivileged user inside memcg-limited container can trigger creation of huge number of non-accounted fasync_struct objects --- fs/fcntl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/fcntl.c b/fs/fcntl.c
index dfc72f1..7941559 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c@@ -1049,7 +1049,8 @@ static int __init fcntl_init(void) __FMODE_EXEC | __FMODE_NONOTIFY)); fasync_cache = kmem_cache_create("fasync_cache", - sizeof(struct fasync_struct), 0, SLAB_PANIC, NULL); + sizeof(struct fasync_struct), 0, + SLAB_PANIC | SLAB_ACCOUNT, NULL); return 0; }
--
1.8.3.1