From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 25F76257824 for ; Sat, 27 Dec 2025 10:57:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766833043; cv=none; b=YwVZ6JxdTQu35xlg4fsmdcgXlg5XYp0ZGNiZnJSA2cHePPW2gi5IaHS8wY5GxLniGJF5+Ecf5MTAYN7t5M+Tyi6UjQ60lIOyWKzXGdr/cAvVqJsrLe2R5FC6xAZ/xzzoSoxaieXM/TWjfIEMJGdGlYEdQNjxUoNou2MfzDSOWeU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766833043; c=relaxed/simple; bh=rhTQZ8vxq6jVhKHebvT16f5m7YIFue4TUDOLrxr5FNo=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=cLkosJvaLd4YFL1uhu9hPSg95Rp29WRXELIQMe9i0sjdyZNsMSbLmhzH51j0Ky+q8x1nPPdBHXbBQ32+JYmvU1IUSnTTJlbNi0gABuwyWpey5KeL1q9mX6XbPw9gMEd/pmc/G2pDA721uI5/L6zsBD25550MInLGICaF7F3OxqA= 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=209.85.161.78 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-oo1-f78.google.com with SMTP id 006d021491bc7-65eb49dd974so7494314eaf.1 for ; Sat, 27 Dec 2025 02:57:21 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1766833041; x=1767437841; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ddCccnQZPB/IsHqHveb8GoQBrKt86g09I97g6eGRJIE=; b=TCceAiYoQamY4VK8572Lk7Bh2cmCblDEXALqbbnAMJpau0KZihbcxsDBI7ksi5zhqS tGdagDeoTkSxYt3WKw7eoYZy4hXN8k+pY0G7WXK6l2ew7cG/L7EWv2GbXbS3d6QG3mAl UEkbHkE8kHh4ufXsar6GvY/8sJHYqzCVPOK1psfzNijmxcEJehG3Kyf16wmV76Ql/8w+ aG924lXN9xrz3Y7O1DiKeZi4ld7QSGU/J5sOmLey7IhzaewNZk7TTDcPoRMUg5BYBkJ9 VeqrEaqz2ZoJLOBDollANpjdyA7b5D7kfKW+HLfWbzsOAAXFAbJlOpXmr7ZAnQMdG+qJ gyUw== X-Forwarded-Encrypted: i=1; AJvYcCXS/bQqzRPIfYCbocfqu2QldpDQ2CXeToUTfSaQ4TEGipwyQ6eIeOoGvfEEJsGbYnkFT0imHGtG8lNdvAg=@vger.kernel.org X-Gm-Message-State: AOJu0YyVWFMiWk2KQynp5x5hPHBqqrJwu33lbzMvWO8OSJsbi+Cnurpr 3nXpYawsKgxtPDS+YAZMkqj+PE3+RGHs/8AujU4kO3yEVnzF+2dVfceQoU8XHxisYH1wTlwBI2V v1SuSCGmmsjvFfhbS5z0jgapXbwUthXwAzG4LX+GxP8LOOHygu4FF/Eu2Lwo= X-Google-Smtp-Source: AGHT+IHiVyY1c/d3RCTIoZDEgt7T6m2cqR6ccFEaSb0YMyWtooHjP93VvGRSLBfDxrAD8QZtgaJzTgJ/x9VZLdFz+FcHkRwa9Idy Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2c0a:b0:659:a8f3:e10f with SMTP id 006d021491bc7-65cfe770b7cmr10151415eaf.31.1766833041118; Sat, 27 Dec 2025 02:57:21 -0800 (PST) Date: Sat, 27 Dec 2025 02:57:21 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <694fbb91.050a0220.35954c.008e.GAE@google.com> Subject: [syzbot] [gfs2?] kernel BUG in gfs2_unpin From: syzbot To: agruenba@redhat.com, gfs2@lists.linux.dev, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b927546677c8 Merge tag 'dma-mapping-6.19-2025-12-22' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1681cd84580000 kernel config: https://syzkaller.appspot.com/x/.config?x=513255d80ab78f2b dashboard link: https://syzkaller.appspot.com/bug?extid=0c5024a57ccf4017c187 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-b9275466.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/16f89c42bab9/vmlinux-b9275466.xz kernel image: https://storage.googleapis.com/syzbot-assets/54c5ab9b0ef0/bzImage-b9275466.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0c5024a57ccf4017c187@syzkaller.appspotmail.com syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=68719479344, nr_sectors = 8 limit=32768 Buffer I/O error on dev loop0, logical block 8589934918, lost async page write ------------[ cut here ]------------ kernel BUG at fs/gfs2/lops.c:107! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5355 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:gfs2_unpin+0x9ac/0x9c0 fs/gfs2/lops.c:107 Code: fe e9 24 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 52 fb ff ff 4c 89 e7 e8 cf a6 25 fe e9 45 fb ff ff e8 25 fb bd fd 90 <0f> 0b e8 1d fb bd fd 90 0f 0b e8 15 fb bd fd 90 0f 0b 66 90 90 90 RSP: 0018:ffffc9000ae771b0 EFLAGS: 00010293 RAX: ffffffff840309fb RBX: ffff8880458af000 RCX: ffff88801f9e8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 1ffff11008b15e09 R08: ffff8880548e3917 R09: 1ffff1100a91c722 R10: dffffc0000000000 R11: ffffed100a91c723 R12: dffffc0000000000 R13: ffff8880458ae230 R14: ffff8880548e3910 R15: ffff888000e30000 FS: 00007fc9591536c0(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000010f15000 CR4: 0000000000352ef0 Call Trace: databuf_lo_after_commit+0x15e/0x1b0 fs/gfs2/lops.c:1077 lops_after_commit fs/gfs2/lops.h:51 [inline] gfs2_log_flush+0xf60/0x24c0 fs/gfs2/log.c:1110 gfs2_jdata_writepages+0xf9/0x150 fs/gfs2/aops.c:370 do_writepages+0x32e/0x550 mm/page-writeback.c:2598 filemap_writeback mm/filemap.c:387 [inline] filemap_fdatawrite_range mm/filemap.c:412 [inline] filemap_write_and_wait_range+0x21f/0x320 mm/filemap.c:684 filemap_write_and_wait include/linux/pagemap.h:65 [inline] iomap_bmap+0x1a6/0x3c0 fs/iomap/fiemap.c:106 gfs2_bmap+0x171/0x200 fs/gfs2/aops.c:573 bmap+0xac/0xe0 fs/inode.c:2040 ioctl_fibmap fs/ioctl.c:76 [inline] file_ioctl+0x41d/0x780 fs/ioctl.c:326 do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:576 __do_sys_ioctl fs/ioctl.c:595 [inline] __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc95838f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc959153038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc9585e6180 RCX: 00007fc95838f7c9 RDX: 0000200000000280 RSI: 0000000000000001 RDI: 0000000000000008 RBP: 00007fc958413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc9585e6218 R14: 00007fc9585e6180 R15: 00007ffede3a3fa8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:gfs2_unpin+0x9ac/0x9c0 fs/gfs2/lops.c:107 Code: fe e9 24 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 52 fb ff ff 4c 89 e7 e8 cf a6 25 fe e9 45 fb ff ff e8 25 fb bd fd 90 <0f> 0b e8 1d fb bd fd 90 0f 0b e8 15 fb bd fd 90 0f 0b 66 90 90 90 RSP: 0018:ffffc9000ae771b0 EFLAGS: 00010293 RAX: ffffffff840309fb RBX: ffff8880458af000 RCX: ffff88801f9e8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 1ffff11008b15e09 R08: ffff8880548e3917 R09: 1ffff1100a91c722 R10: dffffc0000000000 R11: ffffed100a91c723 R12: dffffc0000000000 R13: ffff8880458ae230 R14: ffff8880548e3910 R15: ffff888000e30000 FS: 00007fc9591536c0(0000) GS:ffff88808d416000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000010f15000 CR4: 0000000000352ef0 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup