divide error: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 7185 Comm: syz-executor.3 Not tainted 6.9.0-rc5-syzkaller-00355-g2c8159388952 #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 0b 2f b9 ff eb df
RSP: 0018:ffffc900042d7740 EFLAGS: 00010246
RAX: 0000000000001000 RBX: ffff888022494800 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8231d559 RDI: ffff88802249490c
RBP: 0000000000001000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: ffff888029a440a0 R14: ffff888022494920 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:00000000f5efcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002000f000 CR3: 000000005cc2a000 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+0x1b6b/0x2690 fs/netfs/buffered_write.c:384
 netfs_buffered_write_iter_locked+0x213/0x2c0 fs/netfs/buffered_write.c:455
 netfs_file_write_iter+0x1e0/0x470 fs/netfs/buffered_write.c:494
 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_compat_sys_pwritev2 fs/read_write.c:1218 [inline]
 __se_compat_sys_pwritev2 fs/read_write.c:1210 [inline]
 __ia32_compat_sys_pwritev2+0x121/0x1b0 fs/read_write.c:1210
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x75/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf732b579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f5efc5ac EFLAGS: 00000292 ORIG_RAX: 000000000000017b
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000680
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </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 0b 2f b9 ff eb df
RSP: 0018:ffffc900042d7740 EFLAGS: 00010246
RAX: 0000000000001000 RBX: ffff888022494800 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8231d559 RDI: ffff88802249490c
RBP: 0000000000001000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: ffff888029a440a0 R14: ffff888022494920 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802c200000(0063) knlGS:00000000f5efcb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002000f000 CR3: 000000005cc2a000 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 0b 2f b9 ff       	call   0xffb92f47
  3c:	eb df                	jmp    0x1d