From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f79.google.com (mail-ot1-f79.google.com [209.85.210.79]) (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 03DD730C366 for ; Sun, 31 May 2026 10:33:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780223608; cv=none; b=u5tJDAx/4I7Glwh5lWcakFRSlkY8SHL/YTySBxfOKEE7r75B3T0jvIR7V/lr2zR7pNVidek4nIdUrrqJ245dIZgD+uSiaW1MXB51hwQl6CZw3rgclaHSZrkKliwACt0wqs3dWRk76znlvkp3cObG2A7I0/rRJ12K2Q4F/Zbbx3g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780223608; c=relaxed/simple; bh=f8UNjXFAaeOsBZIDOR38kDw+xVuLgYXlHCp9BGm4jq4=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=eLO0imgBvaEZGaTr1kD3g6RWWjrzYjWKRxlUDRAFi4Bd3+OaqvpZ2O3GZOv3tFy3hFqJ/UbyiShfsAF4W7LoA0wOhph2dlxUF4Gg7n6Iky0Gyin+0TNq5mmCMtfpuhjkab3wrB2sjkifoiI1qqOzJdfZRjdyqCN46dOaNeySQ+4= 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=209.85.210.79 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-ot1-f79.google.com with SMTP id 46e09a7af769-7e64d84a305so4689306a34.2 for ; Sun, 31 May 2026 03:33:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780223606; x=1780828406; 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=T9OKJyKvuTCPKFUJBCcuM53iGqkqtEfikMoNQnoEXdg=; b=WmR3i2q25HmLcHUShwDwjAnxQeP3FlQipuHC6ylqB/HqmJyID0EncZS5tISisLROyV YHxAH/yjEfD66sEtuWe5sre1JYP2qO5HB2YuxJMmJpAj58Vm+LEXg0qSMRz3t1KNMKQw Atul64OuuhmvdFIebYlsP3U1STvfPjw4vmtGuR6yDzRg8vR7RKonItuO2+LPTzWObx5H 0g4x9mHCh3jZ1QTzY3OitcHjBQ37n3LvtRC5Jxr2rskzSAqp0K0jfs5yyzuUqAKq64Ij Q1KsSCc2ofX6talXW5LeYXeR9F90cpZXepEUGouHCHC5MKii7hV1UtW0AetIIZP6QWWJ nYDg== X-Forwarded-Encrypted: i=1; AFNElJ+6TeUssTNrAB5Ou4K6102sV53NGY3H46xpH7t9m1NQEc6F4Jsw7Ba84VSZ5XesRBLWYjnBgst0HzJkT4o=@vger.kernel.org X-Gm-Message-State: AOJu0Yx1AMuJBUcur25kNfSI8f21Q+VjbhLSMQFh3pvZ2KTnqHzoO+Hu ofz86bnkOK3Fxyf4YfP823ZG3b0+7+ngWFr80DcSe04xnc4280umzRRk6NTuyZ2O+12yPTcaRIB 54aPaztUzy2AjvPa9u+atzKXQhFdAlTyef4Go0SSwT3MTiID2cnXRvU3hhDs= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2209:b0:69d:b2ff:8763 with SMTP id 006d021491bc7-69e104e81efmr3229206eaf.17.1780223605978; Sun, 31 May 2026 03:33:25 -0700 (PDT) Date: Sun, 31 May 2026 03:33:25 -0700 In-Reply-To: <6a05a5b0.170a0220.290639.01c7.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a1c0e75.b111c304.35cd64.0020.GAE@google.com> Subject: Re: [syzbot] [jfs?] [bfs?] kernel BUG in folio_set_bh (3) From: syzbot To: aivazian.tigran@gmail.com, al@alarsen.net, brauner@kernel.org, daiky0325@gmail.com, jfs-discussion@lists.sourceforge.net, kees@kernel.org, linux-karma-devel-owner@lists.sourceforge.net, linux-karma-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, me@bobcopeland.com, shaggy@kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 174914ea5513 Merge tag 'v7.1-rc6-smb3-client-fixes' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14ce352e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b4166e8ea5fbf7e3 dashboard link: https://syzkaller.appspot.com/bug?extid=32ec8b5bd050c78741c2 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=170e96ec580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-174914ea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/343eb2c4ac93/vmlinux-174914ea.xz kernel image: https://storage.googleapis.com/syzbot-assets/b9e6c020ebad/bzImage-174914ea.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/b7e65fc0b31f/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+32ec8b5bd050c78741c2@syzkaller.appspotmail.com qnx4: block size(32768) > page size(4096) not supported by filesystem ------------[ cut here ]------------ kernel BUG at fs/buffer.c:1479! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5529 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1479 Code: 4c 89 e2 e8 76 56 98 02 e9 42 ff ff ff e8 cc 76 6d ff 48 89 df 48 c7 c6 40 26 df 8b e8 7d be cf fe 90 0f 0b e8 b5 76 6d ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc9000592f9e0 EFLAGS: 00010293 RAX: ffffffff82584f5b RBX: ffffea00010d3600 RCX: ffff88801faea540 RDX: 0000000000000000 RSI: 0000000000008000 RDI: 0000000000008000 RBP: dffffc0000000000 R08: ffffea00010d3607 R09: 1ffffd400021a6c0 R10: dffffc0000000000 R11: fffff9400021a6c1 R12: 0000000000000003 R13: 0000000000008000 R14: ffff88801ccb4740 R15: 0000000000008000 FS: 00007fd10f47c6c0(0000) GS:ffff88808c891000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9ccf517eb8 CR3: 0000000012fdd000 CR4: 0000000000352ef0 Call Trace: folio_alloc_buffers+0x228/0x640 fs/buffer.c:849 grow_dev_folio fs/buffer.c:979 [inline] grow_buffers fs/buffer.c:1020 [inline] __getblk_slow fs/buffer.c:1038 [inline] bdev_getblk+0x2cb/0x6e0 fs/buffer.c:1358 __bread_gfp+0x89/0x3b0 fs/buffer.c:1412 sb_bread include/linux/buffer_head.h:346 [inline] qnx4_fill_super+0x1c6/0x770 fs/qnx4/inode.c:216 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3758 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3834 do_mount fs/namespace.c:4167 [inline] __do_sys_mount fs/namespace.c:4383 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4360 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd10e59ce59 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:00007fd10f47c028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd10e815fa0 RCX: 00007fd10e59ce59 RDX: 0000200000000100 RSI: 0000200000000000 RDI: 0000200000000040 RBP: 00007fd10e632d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000002008080 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd10e816038 R14: 00007fd10e815fa0 R15: 00007ffe36651068 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_set_bh+0x1dc/0x1e0 fs/buffer.c:1479 Code: 4c 89 e2 e8 76 56 98 02 e9 42 ff ff ff e8 cc 76 6d ff 48 89 df 48 c7 c6 40 26 df 8b e8 7d be cf fe 90 0f 0b e8 b5 76 6d ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc9000592f9e0 EFLAGS: 00010293 RAX: ffffffff82584f5b RBX: ffffea00010d3600 RCX: ffff88801faea540 RDX: 0000000000000000 RSI: 0000000000008000 RDI: 0000000000008000 RBP: dffffc0000000000 R08: ffffea00010d3607 R09: 1ffffd400021a6c0 R10: dffffc0000000000 R11: fffff9400021a6c1 R12: 0000000000000003 R13: 0000000000008000 R14: ffff88801ccb4740 R15: 0000000000008000 FS: 00007fd10f47c6c0(0000) GS:ffff88808c891000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559ed6660138 CR3: 0000000012fdd000 CR4: 0000000000352ef0 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.