[moderation] [btrfs?] general protection fault in errseq_set

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 6e51b4b5bbc0 Merge tag 'mips_6.10' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=11b8eaa4980000
kernel config: https://syzkaller.appspot.com/x/.config?x=4381d48cde9bcb26
dashboard link: https://syzkaller.appspot.com/bug?extid=43fe607f28c0f0bcbb14
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
CC: [c...@fb.com dst...@suse.com jo...@toxicpanda.com linux...@vger.kernel.org linux-...@vger.kernel.org]

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-6e51b4b5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2ded6f5d7f90/vmlinux-6e51b4b5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1e9274bab03b/bzImage-6e51b4b5.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+43fe60...@syzkaller.appspotmail.com

BTRFS error (device loop3 state A): Transaction aborted (error -5)
BTRFS: error (device loop3 state A) in __cow_file_range_inline:701: errno=-5 IO failure
BTRFS info (device loop3 state EA): forced readonly
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000026: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137]
CPU: 1 PID: 45 Comm: kworker/u32:2 Not tainted 6.9.0-syzkaller-09868-g6e51b4b5bbc0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: writeback wb_workfn (flush-btrfs-4)
RIP: 0010:errseq_set+0x28/0x150 lib/errseq.c:72
Code: 90 90 f3 0f 1e fa 41 56 41 89 f6 41 55 41 54 55 53 48 89 fb e8 c9 8f 0c fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 01
RSP: 0018:ffffc900009d71b0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000130 RCX: 0000000000000000
RDX: 0000000000000026 RSI: ffffffff848158b7 RDI: 0000000000000130
RBP: 00000000fffffffb R08: 0000000000000001 R09: fffffbfff284be69
R10: ffffffff9425f34f R11: ffffffff93946908 R12: 0000000000000000
R13: ffffea0001239140 R14: 00000000fffffffb R15: ffffea0001239158
FS: 0000000000000000(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b40fc284f8 CR3: 000000004466c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__filemap_set_wb_err+0x22/0x200 mm/filemap.c:705
mapping_set_error include/linux/pagemap.h:234 [inline]
__extent_writepage fs/btrfs/extent_io.c:1517 [inline]
extent_write_cache_pages+0x105e/0x1ce0 fs/btrfs/extent_io.c:2173
btrfs_writepages+0x21b/0x4a0 fs/btrfs/extent_io.c:2294
do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2634
__writeback_single_inode+0x163/0xf90 fs/fs-writeback.c:1651
writeback_sb_inodes+0x611/0x1150 fs/fs-writeback.c:1947
wb_writeback+0x199/0xb50 fs/fs-writeback.c:2127
wb_do_writeback fs/fs-writeback.c:2274 [inline]
wb_workfn+0x28d/0xf40 fs/fs-writeback.c:2314
process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
process_scheduled_works kernel/workqueue.c:3312 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:errseq_set+0x28/0x150 lib/errseq.c:72
Code: 90 90 f3 0f 1e fa 41 56 41 89 f6 41 55 41 54 55 53 48 89 fb e8 c9 8f 0c fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 01
RSP: 0018:ffffc900009d71b0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000130 RCX: 0000000000000000
RDX: 0000000000000026 RSI: ffffffff848158b7 RDI: 0000000000000130
RBP: 00000000fffffffb R08: 0000000000000001 R09: fffffbfff284be69
R10: ffffffff9425f34f R11: ffffffff93946908 R12: 0000000000000000
R13: ffffea0001239140 R14: 00000000fffffffb R15: ffffea0001239158
FS: 0000000000000000(0000) GS:ffff88806b100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b40fc284f8 CR3: 000000002c1d8000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: f3 0f 1e fa endbr64
6: 41 56 push %r14
8: 41 89 f6 mov %esi,%r14d
b: 41 55 push %r13
d: 41 54 push %r12
f: 55 push %rbp
10: 53 push %rbx
11: 48 89 fb mov %rdi,%rbx
14: e8 c9 8f 0c fd call 0xfd0c8fe2
19: 48 89 da mov %rbx,%rdx
1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
23: fc ff df
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction
2e: 48 89 d8 mov %rbx,%rax
31: 83 e0 07 and $0x7,%eax
34: 83 c0 03 add $0x3,%eax
37: 38 d0 cmp %dl,%al
39: 7c 08 jl 0x43
3b: 84 d2 test %dl,%dl
3d: 0f .byte 0xf
3e: 85 01 test %eax,(%rcx)


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