divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5056 Comm: syz-executor255 Not tainted 6.6.0-syzkaller-16176-g1b907d050735 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:do_journal_end+0x1901/0x4b40 fs/reiserfs/journal.c:4090 Code: 28 84 c0 0f 85 05 2c 00 00 4a 8d 5c 33 01 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 0c 2c 00 00 41 8b 0f 48 89 d8 31 d2 <48> f7 f1 49 89 d4 48 8b 84 24 e8 00 00 00 42 80 3c 28 00 48 8b 9c RSP: 0018:ffffc900040d77e0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888025171000 RBP: ffffc900040d7a50 R08: ffff888025171fff R09: 0000000000000000 R10: ffff888025171000 R11: ffffed1004a2e400 R12: ffff88807d728017 R13: dffffc0000000000 R14: 0000000000000002 R15: ffff88807d728014 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb455f95db8 CR3: 000000000d730000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_sync_fs+0xce/0x150 fs/reiserfs/super.c:78 sync_filesystem+0xec/0x220 fs/sync.c:56 generic_shutdown_super+0x72/0x2c0 fs/super.c:669 kill_block_super+0x44/0x90 fs/super.c:1667 deactivate_locked_super+0xc1/0x130 fs/super.c:484 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256 task_work_run+0x24a/0x300 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa34/0x2750 kernel/exit.c:871 do_group_exit+0x206/0x2c0 kernel/exit.c:1021 __do_sys_exit_group kernel/exit.c:1032 [inline] __se_sys_exit_group kernel/exit.c:1030 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1030 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fb455f4b849 Code: Unable to access opcode bytes at 0x7fb455f4b81f. RSP: 002b:00007ffe08daf6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb455f4b849 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007fb455fc82d0 R08: ffffffffffffffb8 R09: 00007ffe08daf7c0 R10: 00007ffe08daf7c0 R11: 0000000000000246 R12: 00007fb455fc82d0 R13: 0000000000000000 R14: 00007fb455fc9040 R15: 00007fb455f19d70 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_journal_end+0x1901/0x4b40 fs/reiserfs/journal.c:4090 Code: 28 84 c0 0f 85 05 2c 00 00 4a 8d 5c 33 01 4c 89 e0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 0c 2c 00 00 41 8b 0f 48 89 d8 31 d2 <48> f7 f1 49 89 d4 48 8b 84 24 e8 00 00 00 42 80 3c 28 00 48 8b 9c RSP: 0018:ffffc900040d77e0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000003 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888025171000 RBP: ffffc900040d7a50 R08: ffff888025171fff R09: 0000000000000000 R10: ffff888025171000 R11: ffffed1004a2e400 R12: ffff88807d728017 R13: dffffc0000000000 R14: 0000000000000002 R15: ffff88807d728014 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005613d6657088 CR3: 00000000296ad000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 28 84 c0 0f 85 05 2c sub %al,0x2c05850f(%rax,%rax,8) 7: 00 00 add %al,(%rax) 9: 4a 8d 5c 33 01 lea 0x1(%rbx,%r14,1),%rbx e: 4c 89 e0 mov %r12,%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 0c 2c 00 00 jne 0x2c2e 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: 49 89 d4 mov %rdx,%r12 30: 48 8b 84 24 e8 00 00 mov 0xe8(%rsp),%rax 37: 00 38: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 3d: 48 rex.W 3e: 8b .byte 0x8b 3f: 9c pushf