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| author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 16:34:00 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 16:36:05 +0200 |
| commit | 0a15ba88a32fa7a516aff7ffd27befed5334dff2 (patch) | |
| tree | 5d0932969789f7a616e38235a8d764f9259c1cb3 | |
| parent | f92739fdd4522c4291277136399353d7c341fae4 (diff) | |
| download | linux-stable-0a15ba88a32fa7a516aff7ffd27befed5334dff2.tar.gz linux-stable-0a15ba88a32fa7a516aff7ffd27befed5334dff2.tar.bz2 linux-stable-0a15ba88a32fa7a516aff7ffd27befed5334dff2.zip | |
smb: client: fix potential UAF in is_valid_oplock_break()
commit 69ccf040acddf33a3a85ec0f6b45ef84b0f7ec29 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/misc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/smb/client/misc.c b/fs/smb/client/misc.c index c2137ea3c253..ef573e3f8e52 100644 --- a/fs/smb/client/misc.c +++ b/fs/smb/client/misc.c @@ -489,6 +489,8 @@ is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv) /* 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) { if (tcon->tid != buf->Tid) continue; |