[syzbot] [btrfs?] kernel BUG in clear_inode

From: syzbot
Date: Fri May 31 2024 - 14:56:35 EST


Hello,

syzbot found the following issue on:

HEAD commit: 2bfcfd584ff5 Merge tag 'pmdomain-v6.10-rc1' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=128ea8b4980000
kernel config: https://syzkaller.appspot.com/x/.config?x=733cc7a95171d8e7
dashboard link: https://syzkaller.appspot.com/bug?extid=67ba3c42bcbb4665d3ad
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: i386

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-2bfcfd58.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c7ed3bb80bed/vmlinux-2bfcfd58.xz
kernel image: https://storage.googleapis.com/syzbot-assets/93acc5bfbaef/bzImage-2bfcfd58.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+67ba3c42bcbb4665d3ad@xxxxxxxxxxxxxxxxxxxxxxxxx

------------[ cut here ]------------
kernel BUG at fs/inode.c:626!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 7700 Comm: syz-executor.2 Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:clear_inode+0x15b/0x190 fs/inode.c:626
Code: 00 00 00 5b 5d 41 5c c3 cc cc cc cc e8 1e 7e 8b ff 90 0f 0b e8 16 7e 8b ff 90 0f 0b e8 0e 7e 8b ff 90 0f 0b e8 06 7e 8b ff 90 <0f> 0b e8 fe 7d 8b ff 90 0f 0b e8 b6 b0 e8 ff e9 d2 fe ff ff e8 ac
RSP: 0018:ffffc90003a2fab0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888028014230 RCX: ffffffff82030100
RDX: ffff88801e1fa440 RSI: ffffffff8203016a RDI: 0000000000000007
RBP: 0000000000000040 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000001 R12: 0000000000000020
R13: ffff88802855c000 R14: 0000000000000000 R15: ffff888028014230
FS: 0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:0000000056b5e400
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00007f58c1d30980 CR3: 000000006b300000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000001000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
btrfs_evict_inode+0x529/0xe80 fs/btrfs/inode.c:5262
evict+0x2ed/0x6c0 fs/inode.c:667
dispose_list+0x117/0x1e0 fs/inode.c:700
evict_inodes+0x34e/0x450 fs/inode.c:750
generic_shutdown_super+0xb5/0x3d0 fs/super.c:627
kill_anon_super+0x3a/0x60 fs/super.c:1226
btrfs_kill_super+0x3b/0x50 fs/btrfs/super.c:2096
deactivate_locked_super+0xbe/0x1a0 fs/super.c:473
deactivate_super+0xde/0x100 fs/super.c:506
cleanup_mnt+0x222/0x450 fs/namespace.c:1267
task_work_run+0x14e/0x250 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218
__do_fast_syscall_32+0x80/0x120 arch/x86/entry/common.c:389
do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf72c7579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ff99b808 EFLAGS: 00000292 ORIG_RAX: 0000000000000034
RAX: 0000000000000000 RBX: 00000000ff99b8b0 RCX: 0000000000000009
RDX: 00000000f741dff4 RSI: 00000000f736e361 RDI: 00000000ff99c954
RBP: 00000000ff99b8b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:clear_inode+0x15b/0x190 fs/inode.c:626
Code: 00 00 00 5b 5d 41 5c c3 cc cc cc cc e8 1e 7e 8b ff 90 0f 0b e8 16 7e 8b ff 90 0f 0b e8 0e 7e 8b ff 90 0f 0b e8 06 7e 8b ff 90 <0f> 0b e8 fe 7d 8b ff 90 0f 0b e8 b6 b0 e8 ff e9 d2 fe ff ff e8 ac
RSP: 0018:ffffc90003a2fab0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888028014230 RCX: ffffffff82030100
RDX: ffff88801e1fa440 RSI: ffffffff8203016a RDI: 0000000000000007
RBP: 0000000000000040 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000001 R12: 0000000000000020
R13: ffff88802855c000 R14: 0000000000000000 R15: ffff888028014230
FS: 0000000000000000(0000) GS:ffff88802c000000(0063) knlGS:0000000056b5e400
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000c000f9c4e0 CR3: 000000006b300000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000001000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi


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