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| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-06-29 11:54:23 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-07-01 06:28:09 +0300 |
| commit | b403f0e37a11f84f7ceaf40b0075499e5bcfd220 (patch) | |
| tree | 50cece69d070007009655f40e488c20da578b990 /fs/namespace.c | |
| parent | b42b90d177d0c7f46f9c888c10c7900578ae7e09 (diff) | |
| download | linux-b403f0e37a11f84f7ceaf40b0075499e5bcfd220.tar.xz | |
9p: use file_dentry()
v9fs may be used as lower layer of overlayfs and accessing f_path.dentry
can lead to a crash. In this case it's a NULL pointer dereference in
p9_fid_create().
Fix by replacing direct access of file->f_path.dentry with the
file_dentry() accessor, which will always return a native object.
Reported-by: Alessio Igor Bogani <alessioigorbogani@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Tested-by: Alessio Igor Bogani <alessioigorbogani@gmail.com>
Fixes: 4bacc9c9234c ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Cc: <stable@vger.kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namespace.c')
0 files changed, 0 insertions, 0 deletions