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| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-09-25 19:48:56 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-10-25 20:01:53 -0400 |
| commit | 0c320f776ed83e1ebde4d49bc316b23e868b4737 (patch) | |
| tree | 088e549a0b2b62211fc13c20fc00e42ae0e8f99a | |
| parent | aebf15f0fbd54e8deebc56642c08da15b905027c (diff) | |
reverse_path_check_proc(): don't bother with cookies
We know there's no loops by the time we call it; the
only thing we care about is too deep reverse paths.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/eventpoll.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/eventpoll.c b/fs/eventpoll.c index 3e6f1f97f246..0f540e91aa92 100644 --- a/fs/eventpoll.c +++ b/fs/eventpoll.c @@ -1311,7 +1311,7 @@ static int reverse_path_check_proc(struct file *file, int depth) int error = 0; struct epitem *epi; - if (!ep_push_nested(file)) /* limits recursion */ + if (depth > EP_MAX_NESTS) /* too deep nesting */ return -1; /* CTL_DEL can remove links here, but that can't increase our count */ @@ -1336,7 +1336,6 @@ static int reverse_path_check_proc(struct file *file, int depth) } } rcu_read_unlock(); - nesting--; /* pop */ return error; } |