linux-kernel - [syzbot] [jfs?] kernel BUG in jfs_flush

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Date: Tue, 04 Jun 2024 14:13:26 -0700
From: syzbot <syzbot+e66452054e1f161e8d29@...kaller.appspotmail.com>
To: jfs-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org, 
	shaggy@...nel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [jfs?] kernel BUG in jfs_flush_journal (2)

Hello,

syzbot found the following issue on:

HEAD commit:    d8ec19857b09 Merge tag 'net-6.10-rc2' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13086d3a980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=47d282ddffae809f
dashboard link: https://syzkaller.appspot.com/bug?extid=e66452054e1f161e8d29
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/42229dacbe9b/disk-d8ec1985.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/963a405f2e94/vmlinux-d8ec1985.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d861a4407dce/bzImage-d8ec1985.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e66452054e1f161e8d29@...kaller.appspotmail.com

BUG at fs/jfs/jfs_logmgr.c:1588 assert(list_empty(&log->cqueue))
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_logmgr.c:1588!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 29917 Comm: syz-executor.4 Not tainted 6.10.0-rc1-syzkaller-00104-gd8ec19857b09 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:jfs_flush_journal+0xeba/0xec0 fs/jfs/jfs_logmgr.c:1588
Code: e8 eb 77 57 08 e8 66 07 70 fe 48 c7 c7 40 9d 02 8c 48 c7 c6 40 98 02 8c ba 34 06 00 00 48 c7 c1 80 9d 02 8c e8 c7 7a 54 08 90 <0f> 0b 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90004757b20 EFLAGS: 00010246
RAX: 0000000000000040 RBX: ffff88802538e1a8 RCX: b07b599e2cc86b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90004757c50 R08: ffffffff8176803c R09: fffffbfff1c3998c
R10: dffffc0000000000 R11: fffffbfff1c3998c R12: 1ffff920008eaf70
R13: dffffc0000000000 R14: ffff88802538e000 R15: ffff88802538e000
FS:  000055557b2d6480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555562804978 CR3: 000000007e4b2000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_umount+0x170/0x3a0 fs/jfs/jfs_umount.c:58
 jfs_put_super+0x8a/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x136/0x2d0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1676
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1267
 task_work_run+0x24f/0x310 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+0x168/0x370 kernel/entry/common.c:218
 do_sys


---
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