diff options
author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 22:33:59 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 17:38:21 +0300 |
commit | 3dba0e5276f131e36d6d8043191d856f49238628 (patch) | |
tree | b8ae4b662245dd2bbd3b8e1e22d77e7505a76d45 /fs/smb | |
parent | 3103163ccd3be4adcfa37e15608fb497be044113 (diff) | |
download | linux-3dba0e5276f131e36d6d8043191d856f49238628.tar.xz |
smb: client: fix potential UAF in smb2_is_valid_oplock_break()
commit 22863485a4626ec6ecf297f4cc0aef709bc862e4 upstream.
Skip sessions that are being teared down (status == SES_EXITING) to
avoid UAF.
Cc: stable@vger.kernel.org
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/smb')
-rw-r--r-- | fs/smb/client/smb2misc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/smb/client/smb2misc.c b/fs/smb/client/smb2misc.c index 82b84a4941dd..3f4c37458f97 100644 --- a/fs/smb/client/smb2misc.c +++ b/fs/smb/client/smb2misc.c @@ -697,6 +697,8 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server) /* look up tcon based on tid & uid */ spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { + if (cifs_ses_exiting(ses)) + continue; list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { spin_lock(&tcon->open_file_lock); |