From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 0CC6036C; Sun, 21 Apr 2024 00:21:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713658898; cv=none; b=T6kGX6u04cHyQvoQIqO6yDBuBj4/oHtFXLFz0DNNr/T8J3p7ukDMTS++w8r/HMVBS5FRzInbPgT0OD80m47nC9YqQNhV++DYRw+DJj+GRrXfAihSrs27398nFv8qnOR2f0F/oj7DfvqUq8WzDP0JgBwr3pnc9A/mErH1/Ea/GRQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713658898; c=relaxed/simple; bh=bWhEB44EU+xCR31GHSqW8y0nOZf3Pfvhbwo2n9eiZUM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Aye+fr8LtCWFQ8UqOXc2V/ftREHpFso6lZ95eUzbUczSO7Uw+bhEnNGFSIAn79bhisj0sjM16Z+E8odzrGnNcaqpFVKuluB11iTmiihWIRPKZtAvcAIxzVzhI3aw8i4EbQfuugOLE+VmVKQrmscFdEXL3V7jT/Y2MMXct+OG3Rw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=XoKjUqkb; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="XoKjUqkb" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=cXdj4Y/fti/COs7xn/VBIILsxCDjiWFHrNpqQP0RP+U=; b=XoKjUqkbexemjpVQe9KdnickZD 3kN3WplxDHu3+zlEcmP5J5Ono+lrmr6cMnOnkb7ItX5CKD9zcHN/Mxrq2qwEI/Jlm+ihBBqEOTUEI 8Ru5oY/Lpq2rQKf7X8M7X4i8aAbb2bQFqi3UkXpDIKN8Ry75fssZ2wJKVn60rNq4OTt0rxnxyZarM ZOTQluByd+WvAmx2R/B/uiVZmoe8Hw1EHt0zbpCKRwpYy7ZP4sk8VPFDCcYk1+zaWO9hyCxouiSBP 2REjEBr7WWjqt33Pfmd7wCfrfzUVJtAN9zowvkYiEtH7on3hrBGuNjU/gYmuVXEUEAurpoW0g2XbU byHd0ZZQ==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.96 #2 (Red Hat Linux)) id 1ryKxV-0009aU-0g; Sun, 21 Apr 2024 00:21:29 +0000 Date: Sun, 21 Apr 2024 01:21:29 +0100 From: Al Viro To: syzbot Cc: amir73il@gmail.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [overlayfs?] possible deadlock in ovl_nlink_start Message-ID: <20240421002129.GF2118490@ZenIV> References: <0000000000002615fd06166c7b16@google.com> Precedence: bulk X-Mailing-List: linux-unionfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000002615fd06166c7b16@google.com> Sender: Al Viro On Thu, Apr 18, 2024 at 10:37:18PM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=106c9fa3180000 > kernel config: https://syzkaller.appspot.com/x/.config?x=4d90a36f0cab495a > dashboard link: https://syzkaller.appspot.com/bug?extid=5ad5425056304cbce654 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/72ab73815344/disk-fe46a7dd.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/2d6d6b0d7071/vmlinux-fe46a7dd.xz > kernel image: https://storage.googleapis.com/syzbot-assets/48e275e5478b/bzImage-fe46a7dd.xz Should be fixed in mainline since 72374d71c315