diff options
| author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 21:33:59 +0200 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2024-04-03 21:43:45 +0200 |
| commit | 22863485a4626ec6ecf297f4cc0aef709bc862e4 (patch) | |
| tree | 4bcc4767685bd42b5807c54aaf0c862136e5d97c | |
| parent | smb: client: fix potential UAF in smb2_is_valid_lease_break() (diff) | |
| download | linux-22863485a4626ec6ecf297f4cc0aef709bc862e4.tar.xz linux-22863485a4626ec6ecf297f4cc0aef709bc862e4.zip | |
smb: client: fix potential UAF in smb2_is_valid_oplock_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>
| -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 ed6d033dce96..cc72be5a93a9 100644 --- a/fs/smb/client/smb2misc.c +++ b/fs/smb/client/smb2misc.c @@ -699,6 +699,8 @@ 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); |