divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 3 PID: 5183 Comm: syz-executor293 Not tainted 6.9.0-rc5-syzkaller-00025-ga2c63a3f3d68 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:netfs_submit_writethrough+0x201/0x280 fs/netfs/output.c:427
Code: fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1a 8b 8b 0c 01 00 00 48 89 e8 31 d2 <48> f7 f1 48 89 c5 48 0f af e9 e9 1d ff ff ff e8 9b a3 b8 ff eb df
RSP: 0018:ffffc90003477760 EFLAGS: 00010246
RAX: 0000000000001000 RBX: ffff88802d072c00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff82304719 RDI: ffff88802d072d0c
RBP: 0000000000001000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: ffff8880324e05e0 R14: ffff88802d072d20 R15: 0000000000000000
FS: 0000555585aef480(0000) GS:ffff88806b500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc516dc998 CR3: 0000000029bf4000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
netfs_advance_writethrough+0x13f/0x170 fs/netfs/output.c:449
netfs_perform_write+0x1b9f/0x26b0 fs/netfs/buffered_write.c:385
netfs_buffered_write_iter_locked+0x213/0x2c0 fs/netfs/buffered_write.c:454
netfs_file_write_iter+0x1e0/0x470 fs/netfs/buffered_write.c:493
v9fs_file_write_iter+0xa1/0x100 fs/9p/vfs_file.c:407
call_write_iter include/linux/fs.h:2110 [inline]
do_iter_readv_writev+0x504/0x780 fs/read_write.c:741
vfs_writev+0x36f/0xdb0 fs/read_write.c:971
do_pwritev+0x1b2/0x260 fs/read_write.c:1072
__do_sys_pwritev2 fs/read_write.c:1131 [inline]
__se_sys_pwritev2 fs/read_write.c:1122 [inline]
__x64_sys_pwritev2+0xef/0x160 fs/read_write.c:1122
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fecc4c95b59
Code: 48 83 c4 28 c3 e8 67 17 00 00 0f 1f 80 00 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff380e4b18 EFLAGS: 00000216 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fff380e4b30 RCX: 00007fecc4c95b59
RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000003
RBP: 00007fff380e4b38 R08: 0000000000000000 R09: 0000000000000015
R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000000
R13: 00007fff380e4d98 R14: 0000000000000001 R15: 0000000000000001
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:netfs_submit_writethrough+0x201/0x280 fs/netfs/output.c:427
Code: fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 1a 8b 8b 0c 01 00 00 48 89 e8 31 d2 <48> f7 f1 48 89 c5 48 0f af e9 e9 1d ff ff ff e8 9b a3 b8 ff eb df
RSP: 0018:ffffc90003477760 EFLAGS: 00010246
RAX: 0000000000001000 RBX: ffff88802d072c00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff82304719 RDI: ffff88802d072d0c
RBP: 0000000000001000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: ffff8880324e05e0 R14: ffff88802d072d20 R15: 0000000000000000
FS: 0000555585aef480(0000) GS:ffff88806b500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc516dc998 CR3: 0000000029bf4000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
0: df 48 89 fisttps -0x77(%rax)
3: fa cli
4: 48 c1 ea 03 shr $0x3,%rdx
8: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx
c: 48 89 f8 mov %rdi,%rax
f: 83 e0 07 and $0x7,%eax
12: 83 c0 03 add $0x3,%eax
15: 38 d0 cmp %dl,%al
17: 7c 04 jl 0x1d
19: 84 d2 test %dl,%dl
1b: 75 1a jne 0x37
1d: 8b 8b 0c 01 00 00 mov 0x10c(%rbx),%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 c5 mov %rax,%rbp
2e: 48 0f af e9 imul %rcx,%rbp
32: e9 1d ff ff ff jmp 0xffffff54
37: e8 9b a3 b8 ff call 0xffb8a3d7
3c: eb df jmp 0x1d