diff options
| author | Tuomas Tynkkynen <tuomas@tuxera.com> | 2017-09-06 17:59:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-30 11:35:51 +0300 |
| commit | e4820a86b26ee8da52ef5cf620c5f24865f89628 (patch) | |
| tree | d23f66eaf1c329a4527e457e067f7eddde9be21b /fs/9p | |
| parent | 9f8eafa18a285d5d10e9df8e6622f592df78c037 (diff) | |
| download | linux-e4820a86b26ee8da52ef5cf620c5f24865f89628.tar.xz | |
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 a2f6e9ae1a98..82f1ea6d21a7 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 092d20c643e5..2a03f78dea86 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; } |