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| author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 16:33:59 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 16:36:05 +0200 |
| commit | 21fed37d2bdcde33453faf61d3d4d96c355f04bd (patch) | |
| tree | fd0e08142e79e2f9e9a4819c942169b16b56695c | |
| parent | 10e17ca4000ec34737bde002a13435c38ace2682 (diff) | |
| download | linux-stable-21fed37d2bdcde33453faf61d3d4d96c355f04bd.tar.gz linux-stable-21fed37d2bdcde33453faf61d3d4d96c355f04bd.tar.bz2 linux-stable-21fed37d2bdcde33453faf61d3d4d96c355f04bd.zip | |
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>
| -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); |