Re: [syzbot] WARNING: locking bug in find_lock_entries

[Dmitry Vyukov]

On Mon, 10 Oct 2022 at 09:15, syzbot
<syzbot+17eb1d8cd53dbad65d63@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit:    833477fce7a1 Merge tag 'sound-6.1-rc1' of git://git.kernel..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1268e884880000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=dd3623e135f4c106
> dashboard link: https://syzkaller.appspot.com/bug?extid=17eb1d8cd53dbad65d63
> compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=171bc9a2880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=152e2e1c880000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/7c58f480421f/disk-833477fc.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/8a50ac7bd40b/vmlinux-833477fc.xz
> mounted in repro: https://storage.googleapis.com/syzbot-assets/763012bec257/mount_0.gz

+ntfs3 maintainers (ntfs3 is mounted in the repro)
btw, there is the mounted image in the "mounted in repro" link above

> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+17eb1d8cd53dbad65d63@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> ------------[ cut here ]------------
> DEBUG_LOCKS_WARN_ON(chain_key != INITIAL_CHAIN_KEY)
> WARNING: CPU: 1 PID: 7921 at kernel/locking/lockdep.c:5031 __lock_acquire+0x16a2/0x1f60 kernel/locking/lockdep.c:5031
> Modules linked in:
> CPU: 1 PID: 7921 Comm: syz-executor252 Not tainted 6.0.0-syzkaller-05118-g833477fce7a1 #0
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
> RIP: 0010:__lock_acquire+0x16a2/0x1f60 kernel/locking/lockdep.c:5031
> Code: 85 bb 08 00 00 83 3d c4 a6 a5 0c 00 0f 85 e7 fe ff ff 45 31 f6 48 c7 c7 80 7d 8d 8a 48 c7 c6 00 a6 8d 8a 31 c0 e8 4e 45 e8 ff <0f> 0b e9 c8 fe ff ff 0f 0b e9 24 fb ff ff 48 c7 c1 94 96 0c 8e 80
> RSP: 0018:ffffc9000b927448 EFLAGS: 00010046
> RAX: 89f46c2ecaded100 RBX: 0000000000000028 RCX: ffff88807e309d80
> RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
> RBP: 0000000000000001 R08: ffffffff816af64d R09: ffffed1017364f13
> R10: ffffed1017364f13 R11: 1ffff11017364f12 R12: 1ffff1100fc614fd
> R13: d9e18f2b6560b4e9 R14: 0000000000000000 R15: ffff88807e30a818
> FS:  0000555555677300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f4123ae45b0 CR3: 000000007a13c000 CR4: 00000000003506e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> Call Trace:
>  <TASK>
>  lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5666
>  rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:304
>  rcu_read_lock include/linux/rcupdate.h:738 [inline]
>  find_lock_entries+0x173/0x1040 mm/filemap.c:2099
>  truncate_inode_pages_range+0x1a2/0x1780 mm/truncate.c:364
>  ntfs_evict_inode+0x18/0xb0 fs/ntfs3/inode.c:1741
>  evict+0x2a4/0x620 fs/inode.c:665
>  ntfs_fill_super+0x3af3/0x42a0 fs/ntfs3/super.c:1190
>  get_tree_bdev+0x400/0x620 fs/super.c:1323
>  vfs_get_tree+0x88/0x270 fs/super.c:1530
>  do_new_mount+0x289/0xad0 fs/namespace.c:3040
>  do_mount fs/namespace.c:3383 [inline]
>  __do_sys_mount fs/namespace.c:3591 [inline]
>  __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
>  do_syscall_x64 arch/x86/entry/common.c:50 [inline]
>  do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
>  entry_SYSCALL_64_after_hwframe+0x63/0xcd
> RIP: 0033:0x7f4123ab5b3a
> Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffe8fd49088 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
> RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4123ab5b3a
> RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe8fd490a0
> RBP: 00007ffe8fd490a0 R08: 00007ffe8fd490e0 R09: 00007ffe8fd490e0
> R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004
> R13: 00007ffe8fd490e0 R14: 000000000000010e R15: 0000000020001b50
>  </TASK>
>
>
> ---
> This report is generated by a bot. It may contain errors.
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> syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx.
>
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>
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