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 A3789146000; Fri, 4 Oct 2024 22:53:33 +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=1728082413; cv=none; b=otqrolva0HXUVHMUxtgcuOWuC9M7PyCWhoQFDPrQxb7/nXpOF5SMeEoag/Fl5CButec3UN+7+STqHImdamfIuincBak5qOeGAf8pj442g1UC21uVAmcjyHOYYscEx6QSrixIr4kHvXtZd0kScVZzC1Iu5wSESVgPudTmVwrNj2o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728082413; c=relaxed/simple; bh=nZCWvWLDoMUwOETPnWLC2ITiq2M2h0DFWKYJFLABaqo=; h=Date:From:To:Cc:Subject:Message-Id:In-Reply-To:References: Mime-Version:Content-Type; b=MIH3fy18uxCo8CMN1bzSo7VvjXOiH3SxKtzBDxtNNpQR/L15H/gPjjnVFDvUgTMr7Dfeiacm02cn1n+Hvwh9YxqQ66S35Qc6DwuUZyNgnrjFhotlDp4FZhnndmoiyg7qUkSqcUGzLVcYzOrhqSna1llm44nFaAH5/z6E45hhnFg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=ocmA6c65; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="ocmA6c65" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EEA8EC4CEC6; Fri, 4 Oct 2024 22:53:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1728082413; bh=nZCWvWLDoMUwOETPnWLC2ITiq2M2h0DFWKYJFLABaqo=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=ocmA6c65WA+DZkA7isFeZ8Nz0JrLz0oykPXVfgdnWxurHJxzIX7XmCMzkdplk+zyo kOlA3K335aF33xBh6jnaS9a4yWX+FJRt+FVxX3cCgCiIM85vS2KLiqXudPJr2Sx9Km q/ohUrWNyzvfXzTQRlK0zUUPcAHlD+wWjBij6kOI= Date: Fri, 4 Oct 2024 15:53:32 -0700 From: Andrew Morton To: OGAWA Hirofumi Cc: syzbot , linkinjeon@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [exfat?] KMSAN: uninit-value in vfat_rename2 Message-Id: <20241004155332.b2a7603be540c692e56dc71c@linux-foundation.org> In-Reply-To: <87r08wjsnh.fsf@mail.parknet.co.jp> References: <66ff2c95.050a0220.49194.03e9.GAE@google.com> <87r08wjsnh.fsf@mail.parknet.co.jp> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Fri, 04 Oct 2024 15:20:34 +0900 OGAWA Hirofumi wrote: > syzbot writes: > > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: e7ed34365879 Merge tag 'mailbox-v6.12' of git://git.kernel.. > > git tree: upstream > > console+strace: https://syzkaller.appspot.com/x/log.txt?x=11b54ea9980000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=92da5062b0d65389 > > dashboard link: https://syzkaller.appspot.com/bug?extid=ef0d7bc412553291aa86 > > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14b7ed07980000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=101dfd9f980000 > > > > Downloadable assets: > > disk image: https://storage.googleapis.com/syzbot-assets/66cc3d8c5c10/disk-e7ed3436.raw.xz > > vmlinux: https://storage.googleapis.com/syzbot-assets/c7769a88b445/vmlinux-e7ed3436.xz > > kernel image: https://storage.googleapis.com/syzbot-assets/c1fe4c6ee436/bzImage-e7ed3436.xz > > mounted in repro #1: https://storage.googleapis.com/syzbot-assets/2ab98c65fd49/mount_0.gz > > mounted in repro #2: https://storage.googleapis.com/syzbot-assets/7ffc0eb73060/mount_5.gz > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+ef0d7bc412553291aa86@syzkaller.appspotmail.com > > The patch fixes this bug. Please apply. > Thanks. > > > From: OGAWA Hirofumi > Subject: [PATCH] fat: Fix uninitialized variable > Date: Fri, 04 Oct 2024 15:03:49 +0900 > > Reported-by: syzbot+ef0d7bc412553291aa86@syzkaller.appspotmail.com > Signed-off-by: OGAWA Hirofumi Could we please have some description? Seems that an IO error triggers this?