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| author | Paulo Alcantara <pc@manguebit.com> | 2024-04-02 16:34:02 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-10 16:28:34 +0200 |
| commit | f9414004798d9742c1af23a1d839fe6a9503751c (patch) | |
| tree | 8d3c1e6602ac7c8c123deb84f0ab6d24ff2dcd46 | |
| parent | 494c91e1e9413b407d12166a61b84200d4d54fac (diff) | |
| download | linux-f9414004798d9742c1af23a1d839fe6a9503751c.tar.gz linux-f9414004798d9742c1af23a1d839fe6a9503751c.tar.bz2 linux-f9414004798d9742c1af23a1d839fe6a9503751c.zip | |
smb: client: fix potential UAF in smb2_is_network_name_deleted()
commit 63981561ffd2d4987807df4126f96a11e18b0c1d 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/smb2ops.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 3c471dc90659..2291081653a8 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -2437,6 +2437,8 @@ smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) 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 == le32_to_cpu(shdr->Id.SyncId.TreeId)) { spin_lock(&tcon->tc_lock); |