diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2022-11-18 14:48:00 +0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2022-11-19 14:27:37 -0600 |
| commit | f391d6ee002ea022c62dc0b09d0578f3ccce81be (patch) | |
| tree | 4cacff0724b6df3f5e6c68b4d240d8321b6b0ae8 /fs/cifs/sess.c | |
| parent | 926028aaa3827554096d42ffb0c2973bc7f5e80f (diff) | |
cifs: Use after free in debug code
This debug code dereferences "old_iface" after it was already freed by
the call to release_iface(). Re-order the debugging to avoid this
issue.
Fixes: b54034a73baf ("cifs: during reconnect, update interface if necessary")
Cc: stable@vger.kernel.org # 5.19+
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/sess.c')
| -rw-r--r-- | fs/cifs/sess.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c index 92e4278ec35d..9e7d9f0baa18 100644 --- a/fs/cifs/sess.c +++ b/fs/cifs/sess.c @@ -302,14 +302,14 @@ cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server) /* now drop the ref to the current iface */ if (old_iface && iface) { - kref_put(&old_iface->refcount, release_iface); cifs_dbg(FYI, "replacing iface: %pIS with %pIS\n", &old_iface->sockaddr, &iface->sockaddr); - } else if (old_iface) { kref_put(&old_iface->refcount, release_iface); + } else if (old_iface) { cifs_dbg(FYI, "releasing ref to iface: %pIS\n", &old_iface->sockaddr); + kref_put(&old_iface->refcount, release_iface); } else { WARN_ON(!iface); cifs_dbg(FYI, "adding new iface: %pIS\n", &iface->sockaddr); |