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| author | Tuomas Tynkkynen <tuomas@tuxera.com> | 2017-09-06 17:59:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 08:40:49 +0000 |
| commit | b178968f557219ae359cbd6c12d84f159038a38d (patch) | |
| tree | f6f7a15b2814688f496747d1b88b3103b2a0e623 /fs/9p | |
| parent | d8319b3bbc296db662736b5c00ff79dccafa19a0 (diff) | |
| download | linux-stable-b178968f557219ae359cbd6c12d84f159038a38d.tar.gz linux-stable-b178968f557219ae359cbd6c12d84f159038a38d.tar.bz2 linux-stable-b178968f557219ae359cbd6c12d84f159038a38d.zip | |
fs/9p: Compare qid.path in v9fs_test_inode
commit 8ee031631546cf2f7859cc69593bd60bbdd70b46 upstream.
Commit fd2421f54423 ("fs/9p: When doing inode lookup compare qid details
and inode mode bits.") transformed v9fs_qid_iget() to use iget5_locked()
instead of iget_locked(). However, the test() callback is not checking
fid.path at all, which means that a lookup in the inode cache can now
accidentally locate a completely wrong inode from the same inode hash
bucket if the other fields (qid.type and qid.version) match.
Fixes: fd2421f54423 ("fs/9p: When doing inode lookup compare qid details and inode mode bits.")
Reviewed-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/9p')
| -rw-r--r-- | fs/9p/vfs_inode.c | 3 | ||||
| -rw-r--r-- | fs/9p/vfs_inode_dotl.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 2a5de610dd8f..bdabb2765d1b 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -483,6 +483,9 @@ static int v9fs_test_inode(struct inode *inode, void *data) if (v9inode->qid.type != st->qid.type) return 0; + + if (v9inode->qid.path != st->qid.path) + return 0; return 1; } diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c index 70f9887c59a9..7f6ae21a27b3 100644 --- a/fs/9p/vfs_inode_dotl.c +++ b/fs/9p/vfs_inode_dotl.c @@ -87,6 +87,9 @@ static int v9fs_test_inode_dotl(struct inode *inode, void *data) if (v9inode->qid.type != st->qid.type) return 0; + + if (v9inode->qid.path != st->qid.path) + return 0; return 1; } |