From: Al Viro viro@zeniv.linux.org.uk
[ Upstream commit 3701cb59d892b88d569427586f01491552f377b1 ]
or get freed, for that matter, if it's a long (separately stored) name.
Signed-off-by: Al Viro viro@zeniv.linux.org.uk Signed-off-by: Sasha Levin sashal@kernel.org --- fs/eventpoll.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 16313180e4c16..4df61129566d4 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1448,7 +1448,7 @@ static int reverse_path_check(void)
static int ep_create_wakeup_source(struct epitem *epi) { - const char *name; + struct name_snapshot n; struct wakeup_source *ws;
if (!epi->ep->ws) { @@ -1457,8 +1457,9 @@ static int ep_create_wakeup_source(struct epitem *epi) return -ENOMEM; }
- name = epi->ffd.file->f_path.dentry->d_name.name; - ws = wakeup_source_register(NULL, name); + take_dentry_name_snapshot(&n, epi->ffd.file->f_path.dentry); + ws = wakeup_source_register(NULL, n.name.name); + release_dentry_name_snapshot(&n);
if (!ws) return -ENOMEM;