The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x b50492b05fd02887b46aef079592207fb5c97a4c # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2023122804-guiding-corporate-cd79@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: b50492b05fd0 ("smb: client: fix potential OOB in cifs_dump_detail()") 38c8a9a52082 ("smb: move client and server files to common directory fs/smb") abdb1742a312 ("cifs: get rid of mount options string parsing") 9fd29a5bae6e ("cifs: use fs_context for automounts") 68ed14496b03 ("cifs: remove unused server parameter from calc_smb_size()") 5dd8ce24667a ("cifs: missing directory in MAINTAINERS file") 332019e23a51 ("Merge tag '5.20-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b50492b05fd02887b46aef079592207fb5c97a4c Mon Sep 17 00:00:00 2001 From: Paulo Alcantara <pc@xxxxxxxxxxxxx> Date: Sat, 16 Dec 2023 01:10:04 -0300 Subject: [PATCH] smb: client: fix potential OOB in cifs_dump_detail() Validate SMB message with ->check_message() before calling ->calc_smb_size(). Signed-off-by: Paulo Alcantara (SUSE) <pc@xxxxxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx> diff --git a/fs/smb/client/cifs_debug.c b/fs/smb/client/cifs_debug.c index 5596c9f30ccb..60027f5aebe8 100644 --- a/fs/smb/client/cifs_debug.c +++ b/fs/smb/client/cifs_debug.c @@ -40,11 +40,13 @@ void cifs_dump_detail(void *buf, struct TCP_Server_Info *server) #ifdef CONFIG_CIFS_DEBUG2 struct smb_hdr *smb = buf; - cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n", - smb->Command, smb->Status.CifsError, - smb->Flags, smb->Flags2, smb->Mid, smb->Pid); - cifs_dbg(VFS, "smb buf %p len %u\n", smb, - server->ops->calc_smb_size(smb)); + cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n", + smb->Command, smb->Status.CifsError, smb->Flags, + smb->Flags2, smb->Mid, smb->Pid, smb->WordCount); + if (!server->ops->check_message(buf, server->total_read, server)) { + cifs_dbg(VFS, "smb buf %p len %u\n", smb, + server->ops->calc_smb_size(smb)); + } #endif /* CONFIG_CIFS_DEBUG2 */ }
