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| author | Danny Lin <danny@orbstack.dev> | 2024-04-13 17:34:31 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-27 17:13:02 +0200 |
| commit | 2066c28c7fe1c7ca64ba0cb27fdcdb0475ff8d7f (patch) | |
| tree | 8d31ffbe8df30c721d0551af2ec23c61965c29d2 | |
| parent | 1e05f0897425b51f1b8b3d5c62e89a9898aa80d4 (diff) | |
| download | linux-stable-2066c28c7fe1c7ca64ba0cb27fdcdb0475ff8d7f.tar.gz linux-stable-2066c28c7fe1c7ca64ba0cb27fdcdb0475ff8d7f.tar.bz2 linux-stable-2066c28c7fe1c7ca64ba0cb27fdcdb0475ff8d7f.zip | |
fuse: fix leaked ENOSYS error on first statx call
commit eb4b691b9115fae4c844f5941418335575cf667f upstream.
FUSE attempts to detect server support for statx by trying it once and
setting no_statx=1 if it fails with ENOSYS, but consider the following
scenario:
- Userspace (e.g. sh) calls stat() on a file
* succeeds
- Userspace (e.g. lsd) calls statx(BTIME) on the same file
- request_mask = STATX_BASIC_STATS | STATX_BTIME
- first pass: sync=true due to differing cache_mask
- statx fails and returns ENOSYS
- set no_statx and retry
- retry sets mask = STATX_BASIC_STATS
- now mask == cache_mask; sync=false (time_before: still valid)
- so we take the "else if (stat)" path
- "err" is still ENOSYS from the failed statx call
Fix this by zeroing "err" before retrying the failed call.
Fixes: d3045530bdd2 ("fuse: implement statx")
Cc: stable@vger.kernel.org # v6.6
Signed-off-by: Danny Lin <danny@orbstack.dev>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/fuse/dir.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 9307bb4393b8..bd3b21d4850a 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -1317,6 +1317,7 @@ retry: err = fuse_do_statx(inode, file, stat); if (err == -ENOSYS) { fc->no_statx = 1; + err = 0; goto retry; } } else { |