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| author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 16:33:58 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 16:38:21 +0200 |
| commit | a8344e2b69bde63f713b0aa796d70dbeadffddfb (patch) | |
| tree | 80ff2d208aa96931cd0e125f2423c95db0a5e005 | |
| parent | 3dba0e5276f131e36d6d8043191d856f49238628 (diff) | |
| download | linux-stable-a8344e2b69bde63f713b0aa796d70dbeadffddfb.tar.gz linux-stable-a8344e2b69bde63f713b0aa796d70dbeadffddfb.tar.bz2 linux-stable-a8344e2b69bde63f713b0aa796d70dbeadffddfb.zip | |
smb: client: fix potential UAF in smb2_is_valid_lease_break()
commit 705c76fbf726c7a2f6ff9143d4013b18daaaebf1 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 3f4c37458f97..cc72be5a93a9 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( |