diff options
| author |   Al Viro <viro@zeniv.linux.org.uk> | 2021-04-06 19:46:51 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2021-04-06 20:33:00 -0400 |
| commit | 4f0ed93fb92d3528c73c80317509df3f800a222b (patch) | |
| tree | 3b6e9894051b7df05c01c2fabf4d8c1766949e2c /fs/namei.c | |
| parent | Make sure nd->path.mnt and nd->path.dentry are always valid pointers (diff) | |
| download | linux-dev-4f0ed93fb92d3528c73c80317509df3f800a222b.tar.xz linux-dev-4f0ed93fb92d3528c73c80317509df3f800a222b.zip | |
LOOKUP_MOUNTPOINT: we are cleaning "jumped" flag too late
That (and traversals in case of umount .) should be done before
complete_walk(). Either a braino or mismerge damage on queue
reorders - either way, I should've spotted that much earlier.
Fucked-up-by: Al Viro <viro@zeniv.linux.org.uk>
X-Paperbag: Brown
Fixes: 161aff1d93ab "LOOKUP_MOUNTPOINT: fold path_mountpointat() into path_lookupat()"
Cc: stable@vger.kernel.org # v5.7+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to '')
| -rw-r--r-- | fs/namei.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/namei.c b/fs/namei.c index fc8760d4314e..48a2f288e802 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2421,16 +2421,16 @@ static int path_lookupat(struct nameidata *nd, unsigned flags, struct path *path while (!(err = link_path_walk(s, nd)) && (s = lookup_last(nd)) != NULL) ; + if (!err && unlikely(nd->flags & LOOKUP_MOUNTPOINT)) { + err = handle_lookup_down(nd); + nd->flags &= ~LOOKUP_JUMPED; // no d_weak_revalidate(), please... + } if (!err) err = complete_walk(nd); if (!err && nd->flags & LOOKUP_DIRECTORY) if (!d_can_lookup(nd->path.dentry)) err = -ENOTDIR; - if (!err && unlikely(nd->flags & LOOKUP_MOUNTPOINT)) { - err = handle_lookup_down(nd); - nd->flags &= ~LOOKUP_JUMPED; // no d_weak_revalidate(), please... - } if (!err) { *path = nd->path; nd->path.mnt = NULL; |