divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5035 Comm: syz-executor125 Not tainted 6.6.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023 RIP: 0010:do_journal_end+0x129e/0x4770 fs/reiserfs/journal.c:4096 Code: 28 84 c0 0f 85 00 2f 00 00 4d 8d 64 1c 01 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 07 2f 00 00 41 8b 0f 4c 89 e0 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:ffffc900039ef7e0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888027da0000 RBP: ffffc900039efa50 R08: ffff888027da0fff R09: 0000000000000000 R10: ffff888027da0000 R11: ffffed1004fb4200 R12: 0000000000000003 R13: dffffc0000000000 R14: ffff88807875c017 R15: ffff88807875c014 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b0bad913b8 CR3: 0000000073a9d000 CR4: 00000000003506e0 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:666 kill_block_super+0x41/0x70 fs/super.c:1646 deactivate_locked_super+0xa4/0x110 fs/super.c:481 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:180 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0xa2c/0x2650 kernel/exit.c:874 do_group_exit+0x206/0x2c0 kernel/exit.c:1024 __do_sys_exit_group kernel/exit.c:1035 [inline] __se_sys_exit_group kernel/exit.c:1033 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3ad3553849 Code: Unable to access opcode bytes at 0x7f3ad355381f. RSP: 002b:00007ffd0aceb888 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f3ad3553849 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 00007f3ad35d02d0 R08: ffffffffffffffb8 R09: 00007ffd0aceb960 R10: 00007ffd0aceb960 R11: 0000000000000246 R12: 00007f3ad35d02d0 R13: 0000000000000000 R14: 00007f3ad35d1040 R15: 00007f3ad3521d70 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_journal_end+0x129e/0x4770 fs/reiserfs/journal.c:4096 Code: 28 84 c0 0f 85 00 2f 00 00 4d 8d 64 1c 01 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 07 2f 00 00 41 8b 0f 4c 89 e0 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:ffffc900039ef7e0 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888027da0000 RBP: ffffc900039efa50 R08: ffff888027da0fff R09: 0000000000000000 R10: ffff888027da0000 R11: ffffed1004fb4200 R12: 0000000000000003 R13: dffffc0000000000 R14: ffff88807875c017 R15: ffff88807875c014 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005633d424f078 CR3: 0000000025a21000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 28 84 c0 0f 85 00 2f sub %al,0x2f00850f(%rax,%rax,8) 7: 00 00 add %al,(%rax) 9: 4d 8d 64 1c 01 lea 0x1(%r12,%rbx,1),%r12 e: 4c 89 f0 mov %r14,%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 07 2f 00 00 jne 0x2f29 22: 41 8b 0f mov (%r15),%ecx 25: 4c 89 e0 mov %r12,%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