divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 6985 Comm: syz-executor.3 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:do_journal_end+0x1734/0x4f20 fs/reiserfs/journal.c:4090 Code: c6 41 84 f0 0f 85 88 37 00 00 83 e2 07 38 d1 40 0f 9e c6 84 c9 0f 95 c2 40 84 d6 0f 85 71 37 00 00 8b 4b 14 48 8d 7d 18 31 d2 <48> f7 f1 4a 8d 34 22 48 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc9000a617710 EFLAGS: 00010246 RAX: 0000000000000006 RBX: ffff888065c80000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88807eda1018 RBP: ffff88807eda1000 R08: 0000000000000001 R09: 424c724573496552 R10: ffff8880679d8000 R11: ffffffff8a80d49b R12: 0000000000000000 R13: 0000000000001000 R14: ffffc9000a617908 R15: ffff8880406e5658 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200bd038 CR3: 0000000046994000 CR4: 0000000000350ef0 Call Trace: do_journal_release fs/reiserfs/journal.c:1939 [inline] journal_release+0x4cf/0x660 fs/reiserfs/journal.c:1970 reiserfs_put_super+0xe9/0x5c0 fs/reiserfs/super.c:616 generic_shutdown_super+0x161/0x3c0 fs/super.c:696 kill_block_super+0x3b/0x90 fs/super.c:1667 deactivate_locked_super+0xbc/0x1a0 fs/super.c:484 deactivate_super+0xde/0x100 fs/super.c:517 cleanup_mnt+0x222/0x450 fs/namespace.c:1256 task_work_run+0x14d/0x240 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa92/0x2ae0 kernel/exit.c:871 do_group_exit+0xd4/0x2a0 kernel/exit.c:1021 get_signal+0x23ba/0x2790 kernel/signal.c:2904 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 do_syscall_64+0x4b/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f16e80a7ef5 Code: Unable to access opcode bytes at 0x7f16e80a7ecb. RSP: 002b:00007f16e8e54010 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f16e819c050 RCX: 00007f16e80a7ef5 RDX: 00007f16e8e54050 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f16e80c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 000000000000006e R14: 00007f16e819c050 R15: 00007ffe36074318 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_journal_end+0x1734/0x4f20 fs/reiserfs/journal.c:4090 Code: c6 41 84 f0 0f 85 88 37 00 00 83 e2 07 38 d1 40 0f 9e c6 84 c9 0f 95 c2 40 84 d6 0f 85 71 37 00 00 8b 4b 14 48 8d 7d 18 31 d2 <48> f7 f1 4a 8d 34 22 48 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 RSP: 0018:ffffc9000a617710 EFLAGS: 00010246 RAX: 0000000000000006 RBX: ffff888065c80000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88807eda1018 RBP: ffff88807eda1000 R08: 0000000000000001 R09: 424c724573496552 R10: ffff8880679d8000 R11: ffffffff8a80d49b R12: 0000000000000000 R13: 0000000000001000 R14: ffffc9000a617908 R15: ffff8880406e5658 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32e3c000 CR3: 0000000060ab9000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: c6 41 84 f0 movb $0xf0,-0x7c(%rcx) 4: 0f 85 88 37 00 00 jne 0x3792 a: 83 e2 07 and $0x7,%edx d: 38 d1 cmp %dl,%cl f: 40 0f 9e c6 setle %sil 13: 84 c9 test %cl,%cl 15: 0f 95 c2 setne %dl 18: 40 84 d6 test %dl,%sil 1b: 0f 85 71 37 00 00 jne 0x3792 21: 8b 4b 14 mov 0x14(%rbx),%ecx 24: 48 8d 7d 18 lea 0x18(%rbp),%rdi 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 4a 8d 34 22 lea (%rdx,%r12,1),%rsi 31: 48 89 fa mov %rdi,%rdx 34: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 3b: fc ff df 3e: 48 rex.W 3f: c1 .byte 0xc1