Message-ID: <dc7a742f3b2a4162f5f0a1f45a20c1fb76ce8eaa.camel@gmail.com>
Date: Fri, 01 Nov 2024 11:05:29 +0800
From: Julian Sun <sunjunchao2870@...il.com>
To: syzbot <syzbot+2665d678fffcc4608e18@...kaller.appspotmail.com>, 
 clm@...com, dsterba@...e.com, josef@...icpanda.com,
 linux-btrfs@...r.kernel.org,  linux-kernel@...r.kernel.org,
 syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] kernel BUG in close_ctree

On Fri, 2022-11-25 at 09:09 -0800, syzbot wrote:
> > syzbot has found a reproducer for the following issue on:
> > 
> > HEAD commit:    c3eb11fbb826 Merge tag 'pci-v6.1-fixes-3' of
> > git://git.ker..
> > git tree:       upstream
> > console+strace:
> > https://syzkaller.appspot.com/x/log.txt?x=115013c5880000
> > kernel config:  
> > https://syzkaller.appspot.com/x/.config?x=8d01b6e3197974dd
> > dashboard link: 
> > https://syzkaller.appspot.com/bug?extid=2665d678fffcc4608e18
> > 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=1360d8e3880000
> > C reproducer:  
> > https://syzkaller.appspot.com/x/repro.c?x=175f0d53880000
> > 
> > Downloadable assets:
> > disk image: 
> > https://storage.googleapis.com/syzbot-assets/d81ac029767f/disk-c3eb11fb.raw.xz
> > vmlinux: 
> > https://storage.googleapis.com/syzbot-assets/b68346b5b73c/vmlinux-c3eb11fb.xz
> > kernel image: 
> > https://storage.googleapis.com/syzbot-assets/410a61724587/bzImage-c3eb11fb.xz
> > mounted in repro: 
> > https://storage.googleapis.com/syzbot-assets/f5bd1887114f/mount_0.gz
> > 
> > IMPORTANT: if you fix the issue, please add the following tag to the
> > commit:
> > Reported-by: syzbot+2665d678fffcc4608e18@...kaller.appspotmail.com
> > 
> > assertion failed: list_empty(&fs_info->delayed_iputs), in
> > fs/btrfs/disk-io.c:4664
> > ------------[ cut here ]------------
> > kernel BUG at fs/btrfs/ctree.h:3713!
> > invalid opcode: 0000 [#1] PREEMPT SMP KASAN
> > CPU: 1 PID: 3632 Comm: syz-executor235 Not tainted
> > 6.1.0-rc6-syzkaller-00015-gc3eb11fbb826 #0
> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> > Google 10/26/2022
> > RIP: 0010:assertfail+0x1a/0x1c fs/btrfs/ctree.h:3713
> > Code: 48 c7 c2 80 aa 38 8b 31 c0 e8 ef e3 ff ff 0f 0b 89 f1 48 89 fe 48
> > c7 c7 60 d9 38 8b 48 c7 c2 50 0a 39 8b 31 c0 e8 d3 e3 ff ff <0f> 0b 55
> > 48
> > 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec
> > RSP: 0018:ffffc90003d7fa58 EFLAGS: 00010246
> > RAX: 0000000000000051 RBX: ffff88807c960d58 RCX: 83509907ab950400
> > RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
> > RBP: ffffc90003d7fbe8 R08: ffffffff816e568d R09: fffff520007aff05
> > R10: fffff520007aff05 R11: 1ffff920007aff04 R12: 0000000000000000
> > R13: ffff88807c960000 R14: dffffc0000000000 R15: dffffc0000000000
> > FS:  00005555573a6300(0000) GS:ffff8880b9900000(0000)
> > knlGS:0000000000000000
> > CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 00007ffcab996e28 CR3: 0000000078318000 CR4: 00000000003506e0
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > Call Trace:
> >  <TASK>
> >  close_ctree+0x818/0xbde fs/btrfs/disk-io.c:4664
> >  generic_shutdown_super+0x130/0x310 fs/super.c:492
> >  kill_anon_super+0x36/0x60 fs/super.c:1086
> >  btrfs_kill_super+0x3d/0x50 fs/btrfs/super.c:2441
> >  deactivate_locked_super+0xa7/0xf0 fs/super.c:332
> >  cleanup_mnt+0x494/0x520 fs/namespace.c:1186
> >  task_work_run+0x243/0x300 kernel/task_work.c:179
> >  ptrace_notify+0x29a/0x340 kernel/signal.c:2354
> >  ptrace_report_syscall include/linux/ptrace.h:420 [inline]
> >  ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline]
> >  syscall_exit_work+0x8c/0xe0 kernel/entry/common.c:251
> >  syscall_exit_to_user_mode_prepare+0x63/0xc0 kernel/entry/common.c:278
> >  __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
> >  syscall_exit_to_user_mode+0xa/0x60 kernel/entry/common.c:296
> >  do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
> >  entry_SYSCALL_64_after_hwframe+0x63/0xcd
> > RIP: 0033:0x7fd3e400af67
> > Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 b8 ff ff ff f7 d8 64
> > 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01
> > f0
> > ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
> > RSP: 002b:00007ffcab997568 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6
> > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd3e400af67
> > RDX: 00007ffcab99762a RSI: 000000000000000a RDI: 00007ffcab997620
> > RBP: 00007ffcab997620 R08: 00000000ffffffff R09: 00007ffcab997400
> > R10: 00005555573a7653 R11: 0000000000000202 R12: 00007ffcab9986e0
> > R13: 00005555573a75f0 R14: 00007ffcab997590 R15: 00007ffcab998700
> >  </TASK>
> > Modules linked in:
> > ---[ end trace 0000000000000000 ]---
> > RIP: 0010:assertfail+0x1a/0x1c fs/btrfs/ctree.h:3713
> > Code: 48 c7 c2 80 aa 38 8b 31 c0 e8 ef e3 ff ff 0f 0b 89 f1 48 89 fe 48
> > c7 c7 60 d9 38 8b 48 c7 c2 50 0a 39 8b 31 c0 e8 d3 e3 ff ff <0f> 0b 55
> > 48
> > 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec
> > RSP: 0018:ffffc90003d7fa58 EFLAGS: 00010246
> > RAX: 0000000000000051 RBX: ffff88807c960d58 RCX: 83509907ab950400
> > RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
> > RBP: ffffc90003d7fbe8 R08: ffffffff816e568d R09: fffff520007aff05
> > R10: fffff520007aff05 R11: 1ffff920007aff04 R12: 0000000000000000
> > R13: ffff88807c960000 R14: dffffc0000000000 R15: dffffc0000000000
> > FS:  00005555573a6300(0000) GS:ffff8880b9800000(0000)
> > knlGS:0000000000000000
> > CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > CR2: 00007fd3e405ad48 CR3: 0000000078318000 CR4: 00000000003506f0
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> > 

#syz test: upstream

-- 
Julian Sun <sunjunchao2870@...il.com>

-- 
Julian Sun <sunjunchao2870@...il.com>

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