From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f72.google.com (mail-oa1-f72.google.com [209.85.160.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4651431A062 for ; Fri, 17 Apr 2026 11:16:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776424563; cv=none; b=ep2dpN8Jk9/8ryus1z7+KCdEnGh3nEjLoifXD1Q5xwopcrTG/dfnFYeKeYMbrT0u8lfi5nl6Ob7MbHVq3XSsMtVMnGIJuMa1nkwEI+ApLLtOdqcqkpoi+W12E0zZtKjKmPWuNxtIAp6Pd3CQGbt6VnmkhkyphuHYO+FOTnFy8v4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776424563; c=relaxed/simple; bh=sDRgJhAb/ztx4ygpFsglE189hObAlMQJhpDpE0Ilne8=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=OQhtLLd0aqxjWNtAqze8vIjdTp0rmRDhuAgIyW/dOndBaVHG+O6rpxcMvkqYWAssHqaBwUrp9jiPc+GAKSteU1oyMKVsGhqLS24ybWjh73x7XihvUA5CODKlslSwF9CfKuXiZB87eEIH7WanEiWC1izCsa8TJ9jajh+ddDjdD98= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.160.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oa1-f72.google.com with SMTP id 586e51a60fabf-42393e9b4aeso573938fac.0 for ; Fri, 17 Apr 2026 04:16:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776424561; x=1777029361; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=R5y7vytnLNcJ562d9BN4QDGjAuB4WNSnXkIOwmk1qLc=; b=TQ9F/g8rDEhakd+Kfqmp+yMxSj/UqgOrJHNyvJkqkYRe2jyDdl/TfM6QB9a84GWZBL rqXdFowQTdBxVJld/unjIvjtZb3pihE62f6qJ8o4sOqQ//7hqNDPaiRdCn6PwxQ1MW1B DX7Q5zybNzOMFbBVHr7gsuJSTgf/z702lIkARJ38s1PWGL2/3MClFw4DtBb5j5L3JSww NmPsPF+79kQzkeRkVxPT9Qp+Pn1ucnTifdMk21dNBjOnotQ0eJ1MVqgg09tmJ9W4vtUH /StU2EtijIO6PTz48gf4++UvBesVijJUViZsZ8g4M/jtVGPmfsi46WOiubNmOOmMc2DZ nYig== X-Gm-Message-State: AOJu0YwAG7HnIR66lB7023r8omwiwhKLAY83mpNhwQzch6MY1PzSFp1q hoX/41c+ZBX+utjSWHmUsj7qtSgXecH0oydjWZSss05sVrf1JagGo2w2NJL548Ybzcbe4uYpKOo ntEhSLpTso9glFjB+xGnuOujHunyW88MohpGOGbfiqBZ8jZVh8tYVALSz0l4= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2224:b0:67f:ac04:6b55 with SMTP id 006d021491bc7-69462e16474mr1137827eaf.10.1776424561308; Fri, 17 Apr 2026 04:16:01 -0700 (PDT) Date: Fri, 17 Apr 2026 04:16:01 -0700 In-Reply-To: <20260417101149.2488963-1-tristmd@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69e21671.050a0220.1de265.001b.GAE@google.com> Subject: Re: [syzbot] [jfs?] KMSAN: uninit-value in txLock From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tristmd@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: kernel BUG in txLock BUG at fs/jfs/jfs_txnmgr.c:663 assert(last) ------------[ cut here ]------------ kernel BUG at fs/jfs/jfs_txnmgr.c:663! Oops: invalid opcode: 0000 [#1] SMP PTI CPU: 1 UID: 0 PID: 6659 Comm: syz.0.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:txLock+0x144c/0x2900 fs/jfs/jfs_txnmgr.c:663 Code: c7 80 20 03 00 00 00 00 00 00 48 c7 c7 1b 47 1e 92 48 c7 c6 f0 5c f6 91 ba 97 02 00 00 48 c7 c1 a7 04 0b 92 e8 b5 34 b7 fc 90 <0f> 0b 48 83 7d b8 00 0f 85 df 0f 00 00 4c 8b 6d 90 41 0f b7 5d 00 RSP: 0018:ffff888049143458 EFLAGS: 00010286 RAX: 000000000000002b RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffff888049143548 R08: ffffea000000000f R09: 0000000000000000 R10: ffff888237c8d028 R11: ffff88823f257df0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fa63e6d76c0(0000) GS:ffff8881aa95c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000022000 CR3: 0000000013ce2000 CR4: 00000000003526f0 Call Trace: xtTruncate+0xffd/0x5210 fs/jfs/jfs_xtree.c:2337 jfs_truncate_nolock+0x223/0x670 fs/jfs/inode.c:396 jfs_truncate fs/jfs/inode.c:420 [inline] jfs_write_failed+0x207/0x3c0 fs/jfs/inode.c:295 jfs_write_end+0xcc/0x110 fs/jfs/inode.c:322 generic_perform_write+0x99f/0x1050 mm/filemap.c:4345 __generic_file_write_iter+0x213/0x460 mm/filemap.c:4441 generic_file_write_iter+0x131/0x980 mm/filemap.c:4467 new_sync_write fs/read_write.c:595 [inline] vfs_write+0xbe1/0x15c0 fs/read_write.c:688 ksys_pwrite64 fs/read_write.c:795 [inline] __do_sys_pwrite64 fs/read_write.c:803 [inline] __se_sys_pwrite64 fs/read_write.c:800 [inline] __x64_sys_pwrite64+0x2ab/0x3b0 fs/read_write.c:800 x64_sys_call+0xbef/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa63d79aef9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa63e6d7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007fa63da05fa0 RCX: 00007fa63d79aef9 RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000004 RBP: 00007fa63d82fee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa63da06038 R14: 00007fa63da05fa0 R15: 00007ffeee193088 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:txLock+0x144c/0x2900 fs/jfs/jfs_txnmgr.c:663 Code: c7 80 20 03 00 00 00 00 00 00 48 c7 c7 1b 47 1e 92 48 c7 c6 f0 5c f6 91 ba 97 02 00 00 48 c7 c1 a7 04 0b 92 e8 b5 34 b7 fc 90 <0f> 0b 48 83 7d b8 00 0f 85 df 0f 00 00 4c 8b 6d 90 41 0f b7 5d 00 RSP: 0018:ffff888049143458 EFLAGS: 00010286 RAX: 000000000000002b RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffff888049143548 R08: ffffea000000000f R09: 0000000000000000 R10: ffff888237c8d028 R11: ffff88823f257df0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fa63e6d76c0(0000) GS:ffff8881aa95c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000022000 CR3: 0000000013ce2000 CR4: 00000000003526f0 Tested on: commit: 43cfbdda Merge tag 'for-linus-iommufd' of git://git.ke.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master console output: https://syzkaller.appspot.com/x/log.txt?x=11e641ba580000 kernel config: https://syzkaller.appspot.com/x/.config?x=572950cdd18a910f dashboard link: https://syzkaller.appspot.com/bug?extid=d3a57c32b9112d7b01ec compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=17da41ba580000