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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2011-07-25 18:06:32 +0000 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2011-09-06 08:17:14 -0500 |
| commit | 5441ae5eb3614d3c28f77073370738a2820c88e4 (patch) | |
| tree | eb61016b762edb343051e5724527eb1484555085 /fs/9p/vfs_inode.c | |
| parent | ddf28352b80c86754a6424e3a61e8bdf9213b3c7 (diff) | |
| download | lwn-5441ae5eb3614d3c28f77073370738a2820c88e4.tar.gz lwn-5441ae5eb3614d3c28f77073370738a2820c88e4.zip | |
fs/9p: Add fid before dentry instantiation
d_instantiate marks the dentry positive. So a parallel lookup and mkdir of
the directory can find dentry that doesn't have fid attached. This can result
in both the code path doing v9fs_fid_add which results in v9fs_dentry leak.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_inode.c')
| -rw-r--r-- | fs/9p/vfs_inode.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 8bb5507e822f..43dd540663af 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -645,13 +645,11 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n", err); goto error; } - d_instantiate(dentry, inode); err = v9fs_fid_add(dentry, fid); if (err < 0) goto error; - + d_instantiate(dentry, inode); return ofid; - error: if (ofid) p9_client_clunk(ofid); |