divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 17771 Comm: syz-executor.5 Not tainted 6.2.0-rc2-syzkaller-00010-g69b41ac87e4a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:flush_commit_list+0xcd4/0x1bb0 fs/reiserfs/journal.c:1068 Code: 03 42 0f b6 04 28 84 c0 0f 85 19 02 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 24 02 00 00 8b 4d 00 4c 89 f8 31 d2 <48> f7 f1 48 89 d3 49 83 c6 18 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 RSP: 0018:ffffc90014cb78f0 EFLAGS: 00010246 RAX: 0000000000000001 RBX: ffff888089211017 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802bcac01c RBP: ffff888089211014 R08: dffffc0000000000 R09: ffffed1005795804 R10: ffffed1005795804 R11: 1ffff11005795803 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88807ca68000 R15: 0000000000000001 FS: 00007fa5e8956700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd3ba14b04 CR3: 0000000028e17000 CR4: 00000000003506e0 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 do_journal_end+0x3f0c/0x4a30 fs/reiserfs/journal.c:4374 reiserfs_sync_fs+0xbb/0x130 fs/reiserfs/super.c:78 iterate_supers+0x137/0x1f0 fs/super.c:724 ksys_sync+0xd5/0x1c0 fs/sync.c:104 __do_sys_sync+0xa/0x10 fs/sync.c:113 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa5e7c8c0a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa5e8956168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007fa5e7dac120 RCX: 00007fa5e7c8c0a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fa5e7ce7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff0d9d29ff R14: 00007fa5e8956300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:flush_commit_list+0xcd4/0x1bb0 fs/reiserfs/journal.c:1068 Code: 03 42 0f b6 04 28 84 c0 0f 85 19 02 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 24 02 00 00 8b 4d 00 4c 89 f8 31 d2 <48> f7 f1 48 89 d3 49 83 c6 18 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 RSP: 0018:ffffc90014cb78f0 EFLAGS: 00010246 RAX: 0000000000000001 RBX: ffff888089211017 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802bcac01c RBP: ffff888089211014 R08: dffffc0000000000 R09: ffffed1005795804 R10: ffffed1005795804 R11: 1ffff11005795803 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88807ca68000 R15: 0000000000000001 FS: 00007fa5e8956700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110f2a019e CR3: 0000000028e17000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 03 42 0f add 0xf(%rdx),%eax 3: b6 04 mov $0x4,%dh 5: 28 84 c0 0f 85 19 02 sub %al,0x219850f(%rax,%rax,8) c: 00 00 add %al,(%rax) e: 48 89 d8 mov %rbx,%rax 11: 48 c1 e8 03 shr $0x3,%rax 15: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax 1a: 84 c0 test %al,%al 1c: 0f 85 24 02 00 00 jne 0x246 22: 8b 4d 00 mov 0x0(%rbp),%ecx 25: 4c 89 f8 mov %r15,%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 c6 18 add $0x18,%r14 34: 4c 89 f0 mov %r14,%rax 37: 48 c1 e8 03 shr $0x3,%rax 3b: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)