divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 14917 Comm: syz-executor Not tainted 5.15.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:do_journal_end+0x12f1/0x4650 fs/reiserfs/journal.c:4089 Code: 04 30 84 c0 0f 85 74 2d 00 00 4f 8d 7c 2f 01 48 89 e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 7a 2d 00 00 8b 0b 4c 89 f8 31 d2 <48> f7 f1 48 89 d3 4c 01 e3 48 8b 84 24 c8 00 00 00 42 80 3c 30 00 RSP: 0018:ffffc90003bcf870 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff888071290014 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807a2bf000 RBP: ffff888071290017 R08: dffffc0000000000 R09: ffff88807a2bf000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff292a2def8 CR3: 00000000739e9000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> do_journal_release+0x478/0x4d0 fs/reiserfs/journal.c:1937 journal_release+0x1b/0x30 fs/reiserfs/journal.c:1968 reiserfs_put_super+0x237/0x4b0 fs/reiserfs/super.c:616 generic_shutdown_super+0x130/0x310 fs/super.c:475 kill_block_super+0x7a/0xe0 fs/super.c:1427 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:188 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0x6a3/0x2480 kernel/exit.c:874 do_group_exit+0x144/0x310 kernel/exit.c:996 __do_sys_exit_group kernel/exit.c:1007 [inline] __se_sys_exit_group kernel/exit.c:1005 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1005 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f36f470ced9 Code: Unable to access opcode bytes at RIP 0x7f36f470ceaf. RSP: 002b:00007ffc41658188 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f36f4780b26 RCX: 00007f36f470ced9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000010 R08: 00007ffc41655f26 R09: 00007ffc41659440 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc41659440 R13: 00007f36f4780ab4 R14: 00005555615284a8 R15: 00007ffc4165a500 </TASK> Modules linked in: ---[ end trace 9e742e6d1500903f ]--- RIP: 0010:do_journal_end+0x12f1/0x4650 fs/reiserfs/journal.c:4089 Code: 04 30 84 c0 0f 85 74 2d 00 00 4f 8d 7c 2f 01 48 89 e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 7a 2d 00 00 8b 0b 4c 89 f8 31 d2 <48> f7 f1 48 89 d3 4c 01 e3 48 8b 84 24 c8 00 00 00 42 80 3c 30 00 RSP: 0018:ffffc90003bcf870 EFLAGS: 00010246 RAX: 0000000000000003 RBX: ffff888071290014 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807a2bf000 RBP: ffff888071290017 R08: dffffc0000000000 R09: ffff88807a2bf000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 0000000000000002 R14: dffffc0000000000 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055edfca47950 CR3: 000000001ef71000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 04 30 add $0x30,%al 2: 84 c0 test %al,%al 4: 0f 85 74 2d 00 00 jne 0x2d7e a: 4f 8d 7c 2f 01 lea 0x1(%r15,%r13,1),%r15 f: 48 89 e8 mov %rbp,%rax 12: 48 c1 e8 03 shr $0x3,%rax 16: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax 1b: 84 c0 test %al,%al 1d: 0f 85 7a 2d 00 00 jne 0x2d9d 23: 8b 0b mov (%rbx),%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: 4c 01 e3 add %r12,%rbx 33: 48 8b 84 24 c8 00 00 mov 0xc8(%rsp),%rax 3a: 00 3b: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)