diff options
| author | Ronnie Sahlberg <lsahlber@redhat.com> | 2022-05-31 06:01:17 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-09 11:22:28 +0300 |
| commit | ce0008a0e410cdd95f0d8cd81b2902ec10a660c4 (patch) | |
| tree | 0bf1274d705b9a8a383d87cd71650ab537d0aa89 /fs/cifs | |
| parent | d7b5577272c21614c57bb894211a232107868c98 (diff) | |
| download | linux-ce0008a0e410cdd95f0d8cd81b2902ec10a660c4.tar.xz | |
cifs: fix potential double free during failed mount
commit 8378a51e3f8140f60901fb27208cc7a6e47047b5 upstream.
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=2088799
Cc: stable@vger.kernel.org
Signed-off-by: Roberto Bergantinos <rbergant@redhat.com>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/cifsfs.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 8f8d281e3151..1e4f5ee9768a 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -826,7 +826,7 @@ cifs_smb3_do_mount(struct file_system_type *fs_type, int flags, struct smb3_fs_context *old_ctx) { int rc; - struct super_block *sb; + struct super_block *sb = NULL; struct cifs_sb_info *cifs_sb = NULL; struct cifs_mnt_data mnt_data; struct dentry *root; @@ -922,9 +922,11 @@ out_super: return root; out: if (cifs_sb) { - kfree(cifs_sb->prepath); - smb3_cleanup_fs_context(cifs_sb->ctx); - kfree(cifs_sb); + if (!sb || IS_ERR(sb)) { /* otherwise kill_sb will handle */ + kfree(cifs_sb->prepath); + smb3_cleanup_fs_context(cifs_sb->ctx); + kfree(cifs_sb); + } } return root; } |