diff options
| author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 16:33:58 -0300 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2024-04-03 14:43:45 -0500 |
| commit | 705c76fbf726c7a2f6ff9143d4013b18daaaebf1 (patch) | |
| tree | 1e1c15a581a3103fae52340705d9129d3073cd18 /fs | |
| parent | 0865ffefea197b437ba78b5dd8d8e256253efd65 (diff) | |
| download | linux-705c76fbf726c7a2f6ff9143d4013b18daaaebf1.tar.gz | |
smb: client: fix potential UAF in smb2_is_valid_lease_break()
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>
Diffstat (limited to 'fs')
| -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 82b84a4941dd2f..ed6d033dce96dd 100644 --- a/fs/smb/client/smb2misc.c +++ b/fs/smb/client/smb2misc.c @@ -622,6 +622,8 @@ smb2_is_valid_lease_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); cifs_stats_inc( |