divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 16852 Comm: kworker/0:12 Not tainted 6.2.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: reiserfs/loop2 flush_async_commits RIP: 0010:flush_commit_list+0x971/0x1bb0 fs/reiserfs/journal.c:1051 Code: 30 84 c0 4c 8b 6c 24 78 0f 85 c7 01 00 00 48 89 e8 48 c1 e8 03 0f b6 04 30 84 c0 0f 85 da 01 00 00 41 8b 0c 24 4c 89 f0 31 d2 <48> f7 f1 48 89 d3 49 83 c7 18 4c 89 f8 48 c1 e8 03 80 3c 30 00 74 RSP: 0018:ffffc90015bdfa28 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88808bfbf00c RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000100 RBP: ffff88808bfbf017 R08: ffffffff82305d51 R09: fffff52002c93282 R10: fffff52002c93282 R11: 1ffff92002c93281 R12: ffff88808bfbf014 R13: ffff88807bb92018 R14: 0000000000000000 R15: ffff88802c9bd000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c0445b4000 CR3: 0000000042f3f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: flush_older_commits fs/reiserfs/journal.c:919 [inline] flush_commit_list+0x3d5/0x1bb0 fs/reiserfs/journal.c:997 flush_async_commits+0xa0/0xc0 fs/reiserfs/journal.c:3554 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:flush_commit_list+0x971/0x1bb0 fs/reiserfs/journal.c:1051 Code: 30 84 c0 4c 8b 6c 24 78 0f 85 c7 01 00 00 48 89 e8 48 c1 e8 03 0f b6 04 30 84 c0 0f 85 da 01 00 00 41 8b 0c 24 4c 89 f0 31 d2 <48> f7 f1 48 89 d3 49 83 c7 18 4c 89 f8 48 c1 e8 03 80 3c 30 00 74 RSP: 0018:ffffc90015bdfa28 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88808bfbf00c RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000100 RBP: ffff88808bfbf017 R08: ffffffff82305d51 R09: fffff52002c93282 R10: fffff52002c93282 R11: 1ffff92002c93281 R12: ffff88808bfbf014 R13: ffff88807bb92018 R14: 0000000000000000 R15: ffff88802c9bd000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb5a65ad988 CR3: 0000000042fba000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 30 84 c0 4c 8b 6c 24 xor %al,0x246c8b4c(%rax,%rax,8) 7: 78 0f js 0x18 9: 85 c7 test %eax,%edi b: 01 00 add %eax,(%rax) d: 00 48 89 add %cl,-0x77(%rax) 10: e8 48 c1 e8 03 callq 0x3e8c15d 15: 0f b6 04 30 movzbl (%rax,%rsi,1),%eax 19: 84 c0 test %al,%al 1b: 0f 85 da 01 00 00 jne 0x1fb 21: 41 8b 0c 24 mov (%r12),%ecx 25: 4c 89 f0 mov %r14,%rax 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 48 89 d3 mov %rdx,%rbx 30: 49 83 c7 18 add $0x18,%r15 34: 4c 89 f8 mov %r15,%rax 37: 48 c1 e8 03 shr $0x3,%rax 3b: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) 3f: 74 .byte 0x74