Message-ID: <67432dee.050a0220.1cc393.0041.GAE@google.com>
Date: Sun, 24 Nov 2024 05:45:18 -0800
From: syzbot <syzbot+aac7bff85be224de5156@...kaller.appspotmail.com>
To: akpm@...ux-foundation.org, clm@...com, dsterba@...e.com, 
	josef@...icpanda.com, linux-btrfs@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org, syzkaller-bugs@...glegroups.com, willy@...radead.org
Subject: [syzbot] [btrfs?] kernel BUG in __folio_start_writeback

Hello,

syzbot found the following issue on:

HEAD commit:    228a1157fb9f Merge tag '6.13-rc-part1-SMB3-client-fixes' o..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13820530580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=402159daa216c89d
dashboard link: https://syzkaller.appspot.com/bug?extid=aac7bff85be224de5156
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13840778580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17840778580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d32a8e8c5aae/disk-228a1157.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/28d5c070092e/vmlinux-228a1157.xz
kernel image: https://storage.googleapis.com/syzbot-assets/45af4bfd9e8e/bzImage-228a1157.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/69603aa12e8f/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aac7bff85be224de5156@...kaller.appspotmail.com

 __fput+0x5ba/0xa50 fs/file_table.c:458
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 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:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
------------[ cut here ]------------
kernel BUG at mm/page-writeback.c:3119!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 12 Comm: kworker/u8:1 Not tainted 6.12.0-syzkaller-08446-g228a1157fb9f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: btrfs-delalloc btrfs_work_helper
RIP: 0010:__folio_start_writeback+0xc06/0x1050 mm/page-writeback.c:3119
Code: 25 ff 0f 00 00 0f 84 d3 00 00 00 e8 14 ae c3 ff e9 ba f5 ff ff e8 0a ae c3 ff 4c 89 f7 48 c7 c6 00 2e 14 8c e8 8b 4f 0d 00 90 <0f> 0b e8 f3 ad c3 ff 4c 89 f7 48 c7 c6 60 34 14 8c e8 74 4f 0d 00
RSP: 0018:ffffc90000117500 EFLAGS: 00010246
RAX: ed413247a2060f00 RBX: 0000000000000002 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0ad620 RDI: 0000000000000001
RBP: ffffc90000117670 R08: ffffffff942b2967 R09: 1ffffffff285652c
R10: dffffc0000000000 R11: fffffbfff285652d R12: 0000000000000000
R13: 1ffff92000022eac R14: ffffea0001cab940 R15: ffff888077139710
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6661870000 CR3: 00000000792b2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_folio fs/btrfs/extent_io.c:187 [inline]
 __process_folios_contig+0x31c/0x540 fs/btrfs/extent_io.c:216
 submit_one_async_extent fs/btrfs/inode.c:1229 [inline]
 submit_compressed_extents+0xdb3/0x16e0 fs/btrfs/inode.c:1632
 run_ordered_work fs/btrfs/async-thread.c:245 [inline]
 btrfs_work_helper+0x56b/0xc50 fs/btrfs/async-thread.c:324
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/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:__folio_start_writeback+0xc06/0x1050 mm/page-writeback.c:3119
Code: 25 ff 0f 00 00 0f 84 d3 00 00 00 e8 14 ae c3 ff e9 ba f5 ff ff e8 0a ae c3 ff 4c 89 f7 48 c7 c6 00 2e 14 8c e8 8b 4f 0d 00 90 <0f> 0b e8 f3 ad c3 ff 4c 89 f7 48 c7 c6 60 34 14 8c e8 74 4f 0d 00
RSP: 0018:ffffc90000117500 EFLAGS: 00010246
RAX: ed413247a2060f00 RBX: 0000000000000002 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8c0ad620 RDI: 0000000000000001
RBP: ffffc90000117670 R08: ffffffff942b2967 R09: 1ffffffff285652c
R10: dffffc0000000000 R11: fffffbfff285652d R12: 0000000000000000
R13: 1ffff92000022eac R14: ffffea0001cab940 R15: ffff888077139710
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ec8463e668 CR3: 000000007ed5e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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