divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 19865 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-11329-g708283abf896 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 RIP: 0010:flush_commit_list+0x951/0x1bf0 fs/reiserfs/journal.c:1051 Code: fc ff df 0f b6 04 18 84 c0 0f 85 b2 01 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 bf 01 00 00 41 8b 0f 48 89 e8 31 d2 <48> f7 f1 48 89 d5 49 83 c4 18 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 RSP: 0018:ffffc90004dcf460 EFLAGS: 00010246 RAX: 00000000000000a6 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 00000000000000a6 R08: ffff888030c79d13 R09: 1ffff1100618f3a2 R10: dffffc0000000000 R11: ffffed100618f3a3 R12: ffff888021207000 R13: 0000000000000000 R14: ffff888033c7d017 R15: ffff888033c7d014 FS: 00007f2d1dd626c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2abfdff000 CR3: 000000007778e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: flush_journal_list+0x2a8/0x1c70 fs/reiserfs/journal.c:1391 flush_used_journal_lists+0x1256/0x15d0 fs/reiserfs/journal.c:1829 do_journal_end+0x39fb/0x4780 do_journal_begin_r+0x970/0x1020 journal_begin+0x14c/0x360 fs/reiserfs/journal.c:3260 __commit_trans_jl fs/reiserfs/journal.c:3871 [inline] reiserfs_commit_for_inode+0x736/0xbe0 fs/reiserfs/journal.c:3927 reiserfs_dir_fsync+0xcb/0x100 fs/reiserfs/dir.c:43 vfs_fsync_range fs/sync.c:188 [inline] vfs_fsync fs/sync.c:202 [inline] do_fsync fs/sync.c:212 [inline] __do_sys_fsync fs/sync.c:220 [inline] __se_sys_fsync fs/sync.c:218 [inline] __x64_sys_fsync+0x196/0x1e0 fs/sync.c:218 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: 0033:0x7f2d1d07cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f2d1dd620c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004a RAX: ffffffffffffffda RBX: 00007f2d1d19bf80 RCX: 00007f2d1d07cae9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007f2d1d0c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f2d1d19bf80 R15: 00007ffc6f1d4528 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:flush_commit_list+0x951/0x1bf0 fs/reiserfs/journal.c:1051 Code: fc ff df 0f b6 04 18 84 c0 0f 85 b2 01 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 bf 01 00 00 41 8b 0f 48 89 e8 31 d2 <48> f7 f1 48 89 d5 49 83 c4 18 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 RSP: 0018:ffffc90004dcf460 EFLAGS: 00010246 RAX: 00000000000000a6 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: 00000000000000a6 R08: ffff888030c79d13 R09: 1ffff1100618f3a2 R10: dffffc0000000000 R11: ffffed100618f3a3 R12: ffff888021207000 R13: 0000000000000000 R14: ffff888033c7d017 R15: ffff888033c7d014 FS: 00007f2d1dd626c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f231c485000 CR3: 000000007778e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: df 0f fisttps (%rdi) 2: b6 04 mov $0x4,%dh 4: 18 84 c0 0f 85 b2 01 sbb %al,0x1b2850f(%rax,%rax,8) b: 00 00 add %al,(%rax) d: 4c 89 f0 mov %r14,%rax 10: 48 c1 e8 03 shr $0x3,%rax 14: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax 18: 84 c0 test %al,%al 1a: 0f 85 bf 01 00 00 jne 0x1df 20: 41 8b 0f mov (%r15),%ecx 23: 48 89 e8 mov %rbp,%rax 26: 31 d2 xor %edx,%edx * 28: 48 f7 f1 div %rcx <-- trapping instruction 2b: 48 89 d5 mov %rdx,%rbp 2e: 49 83 c4 18 add $0x18,%r12 32: 4c 89 e0 mov %r12,%rax 35: 48 c1 e8 03 shr $0x3,%rax 39: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) 3d: 74 .byte 0x74