From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 929E32376E6 for ; Thu, 17 Apr 2025 13:27:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744896432; cv=none; b=K8Lk50bpemLV7fxXMdLTKDsFGICKum3CPiDPRxxGUrcjxSQvbGeJtPMXeOFfIP7OkX0fjJhK/sHz8mEVBjNpbAR2zJky5iXidxBbrTNmeWpS2UUMhFujpKkqwE40tf4//b7o45ihuHHNvp5JaWromWFSFbetl5XwPcwZ/jWcdJk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744896432; c=relaxed/simple; bh=f9SJAVtXTSonB8QOqi2INDTvErAjfZ53w+E62ZvJaeo=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=g7GVZowCufi68n6t8fr3GEupUb2LFXQOhd3rileM7igXVGNUmknRzUFgt2O/GPVn2iCgCNFL4R0mhBSqMtNnc7RDK6GSXhUwas0euQsNCnfu7UGw4/pOR+RV9uJLHh7IkwbFMys5f4RRijXiA+J7lBUHYvrGC1csQTW94WgpLFQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rK/IoPci; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="rK/IoPci" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9A608C4CEE4; Thu, 17 Apr 2025 13:27:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744896432; bh=f9SJAVtXTSonB8QOqi2INDTvErAjfZ53w+E62ZvJaeo=; h=Subject:To:Cc:From:Date:From; b=rK/IoPcitb41nj06VLe8PjVpz5L44hgqcI6GduwgGOJ8469ZdKC6GDa7/vx7lPHFP fun5L+zGUoXRK8S72HKNougbYL2iVu5Vhz/OvcODLFpzgdlpIAN/eNJQ8av2cg2S1i xemKkEDj1VDYyH6fpQvgeaH0OtQeZ1d+bWtzHrrQ= Subject: FAILED: patch "[PATCH] cifs: avoid NULL pointer dereference in dbg call" failed to apply to 5.15-stable tree To: adiupina@astralinux.ru,stfrench@microsoft.com Cc: From: Date: Thu, 17 Apr 2025 15:20:39 +0200 Message-ID: <2025041739-swivel-handball-0839@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-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 . 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-5.15.y git checkout FETCH_HEAD git cherry-pick -x b4885bd5935bb26f0a414ad55679a372e53f9b9b # git commit -s git send-email --to '' --in-reply-to '2025041739-swivel-handball-0839@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From b4885bd5935bb26f0a414ad55679a372e53f9b9b Mon Sep 17 00:00:00 2001 From: Alexandra Diupina Date: Wed, 19 Mar 2025 17:28:58 +0300 Subject: [PATCH] cifs: avoid NULL pointer dereference in dbg call cifs_server_dbg() implies server to be non-NULL so move call under condition to avoid NULL pointer dereference. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: e79b0332ae06 ("cifs: ignore cached share root handle closing errors") Cc: stable@vger.kernel.org Signed-off-by: Alexandra Diupina Signed-off-by: Steve French diff --git a/fs/smb/client/smb2misc.c b/fs/smb/client/smb2misc.c index f3c4b70b77b9..cddf273c14ae 100644 --- a/fs/smb/client/smb2misc.c +++ b/fs/smb/client/smb2misc.c @@ -816,11 +816,12 @@ smb2_handle_cancelled_close(struct cifs_tcon *tcon, __u64 persistent_fid, WARN_ONCE(tcon->tc_count < 0, "tcon refcount is negative"); spin_unlock(&cifs_tcp_ses_lock); - if (tcon->ses) + if (tcon->ses) { server = tcon->ses->server; - - cifs_server_dbg(FYI, "tid=0x%x: tcon is closing, skipping async close retry of fid %llu %llu\n", - tcon->tid, persistent_fid, volatile_fid); + cifs_server_dbg(FYI, + "tid=0x%x: tcon is closing, skipping async close retry of fid %llu %llu\n", + tcon->tid, persistent_fid, volatile_fid); + } return 0; }