divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5124 Comm: syz-executor.4 Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:do_journal_end+0x1822/0x4a30 fs/reiserfs/journal.c:4091 Code: 04 28 84 c0 0f 85 f7 2b 00 00 4a 8d 5c 33 01 4c 89 e0 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 ff 2b 00 00 41 8b 0f 48 89 d8 31 d2 <48> f7 f1 48 89 d3 48 03 5c 24 20 48 8b 84 24 d8 00 00 00 42 80 3c RSP: 0018:ffffc900045ef880 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807ebc9000 RBP: ffffc900045efaf0 R08: dffffc0000000000 R09: ffff88807ebc9000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888037538017 R13: dffffc0000000000 R14: 0000000000000002 R15: ffff888037538014 FS: 000055555687d400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a077821b8 CR3: 000000002ee2e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_journal_release+0x467/0x4c0 fs/reiserfs/journal.c:1940 journal_release+0x1b/0x30 fs/reiserfs/journal.c:1971 reiserfs_put_super+0x245/0x4e0 fs/reiserfs/super.c:616 generic_shutdown_super+0x130/0x310 fs/super.c:492 kill_block_super+0x79/0xd0 fs/super.c:1386 deactivate_locked_super+0xa7/0xf0 fs/super.c:332 cleanup_mnt+0x494/0x520 fs/namespace.c:1291 task_work_run+0x243/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x124/0x150 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f4c25a8d517 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007ffc367c0f58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f4c25a8d517 RDX: 00007ffc367c102b RSI: 000000000000000a RDI: 00007ffc367c1020 RBP: 00007ffc367c1020 R08: 00000000ffffffff R09: 00007ffc367c0df0 R10: 000055555687e8b3 R11: 0000000000000246 R12: 00007f4c25ae6b24 R13: 00007ffc367c20e0 R14: 000055555687e810 R15: 00007ffc367c2120 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_journal_end+0x1822/0x4a30 fs/reiserfs/journal.c:4091 Code: 04 28 84 c0 0f 85 f7 2b 00 00 4a 8d 5c 33 01 4c 89 e0 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 ff 2b 00 00 41 8b 0f 48 89 d8 31 d2 <48> f7 f1 48 89 d3 48 03 5c 24 20 48 8b 84 24 d8 00 00 00 42 80 3c RSP: 0018:ffffc900045ef880 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807ebc9000 RBP: ffffc900045efaf0 R08: dffffc0000000000 R09: ffff88807ebc9000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888037538017 R13: dffffc0000000000 R14: 0000000000000002 R15: ffff888037538014 FS: 000055555687d400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a0770e265 CR3: 000000002ee2e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 04 28 add $0x28,%al 2: 84 c0 test %al,%al 4: 0f 85 f7 2b 00 00 jne 0x2c01 a: 4a 8d 5c 33 01 lea 0x1(%rbx,%r14,1),%rbx f: 4c 89 e0 mov %r12,%rax 12: 48 c1 e8 03 shr $0x3,%rax 16: 42 8a 04 28 mov (%rax,%r13,1),%al 1a: 84 c0 test %al,%al 1c: 0f 85 ff 2b 00 00 jne 0x2c21 22: 41 8b 0f mov (%r15),%ecx 25: 48 89 d8 mov %rbx,%rax 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 48 89 d3 mov %rdx,%rbx 30: 48 03 5c 24 20 add 0x20(%rsp),%rbx 35: 48 8b 84 24 d8 00 00 mov 0xd8(%rsp),%rax 3c: 00 3d: 42 rex.X 3e: 80 .byte 0x80 3f: 3c .byte 0x3c