loop6: detected capacity change from 0 to 16383
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7675 at arch/x86/kernel/traps.c:1079 exc_debug+0xbb/0x140
Modules linked in:
CPU: 0 PID: 7675 Comm: syz-executor.2 Not tainted 5.19.0-rc3-next-20220622 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:exc_debug+0xbb/0x140
Code: c6 40 74 3c 48 8b bd 80 00 00 00 e8 3f d1 eb fc 84 c0 75 25 48 89 e6 48 89 ef e8 00 c9 eb fc 84 c0 75 22 f6 44 24 01 40 74 1b <0f> 0b 48 81 a5 90 00 00 00 ff fe ff ff eb 0c 80 e6 bf 48 89 14 24
RSP: 0018:fffffe0000016f28 EFLAGS: 00010002
RAX: 0000000000000000 RBX: 0000000000010202 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff888016e7bef4
RBP: fffffe0000016f58 R08: 0000000000000000 R09: 0000000000010000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f1f9b9ad700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e127000 CR3: 000000000e7fa000 CR4: 0000000000350ef0
DR0: 0000000020000100 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <#DB>
 asm_exc_debug+0x1a/0x40
RIP: 0010:copy_user_generic_string+0x2c/0x40
Code: cb 83 fa 08 72 27 89 f9 83 e1 07 74 15 83 e9 08 f7 d9 29 ca 8a 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 <f3> 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01
RSP: 0018:ffff88804284fac0 EFLAGS: 00040246
RAX: 0000000000000001 RBX: 0000000000000720 RCX: 00000000000000cb
RDX: 0000000000000000 RSI: ffff888044a8a0c8 RDI: 0000000020000108
RBP: 0000000020000040 R08: 0000000000000000 R09: ffff888044a8a71f
R10: ffffed10089514e3 R11: 0000000000000001 R12: ffff888044a8a000
R13: 00007fffffffe8e0 R14: 0000000000000000 R15: ffff88804284fd48
 </#DB>
 <TASK>
 copyout.part.0+0xd1/0x100
 _copy_to_iter+0x2b1/0x1820
 seq_read_iter+0xdc7/0x12b0
 new_sync_read+0x38a/0x5f0
 vfs_read+0x490/0x5d0
 ksys_read+0x127/0x250
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f1f9e437b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1f9b9ad188 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f1f9e54af60 RCX: 00007f1f9e437b19
RDX: 00000000200000e9 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007f1f9e491f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffccfb29baf R14: 00007f1f9b9ad300 R15: 0000000000022000
 </TASK>
irq event stamp: 958
hardirqs last  enabled at (957): [<ffffffff818b02d3>] prepend_path+0x943/0xe20
hardirqs last disabled at (958): [<ffffffff841ba5d6>] exc_debug+0x66/0x140
softirqs last  enabled at (910): [<ffffffff81168d33>] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (851): [<ffffffff81168d33>] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
loop0: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
nfs: Unknown parameter 'personality'
loop5: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
loop0: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
loop7: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
loop6: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
loop5: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
loop0: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
loop3: detected capacity change from 0 to 16383
nfs: Unknown parameter 'personality'
----------------
Code disassembly (best guess):
   0:	cb                   	lret
   1:	83 fa 08             	cmp    $0x8,%edx
   4:	72 27                	jb     0x2d
   6:	89 f9                	mov    %edi,%ecx
   8:	83 e1 07             	and    $0x7,%ecx
   b:	74 15                	je     0x22
   d:	83 e9 08             	sub    $0x8,%ecx
  10:	f7 d9                	neg    %ecx
  12:	29 ca                	sub    %ecx,%edx
  14:	8a 06                	mov    (%rsi),%al
  16:	88 07                	mov    %al,(%rdi)
  18:	48 ff c6             	inc    %rsi
  1b:	48 ff c7             	inc    %rdi
  1e:	ff c9                	dec    %ecx
  20:	75 f2                	jne    0x14
  22:	89 d1                	mov    %edx,%ecx
  24:	c1 e9 03             	shr    $0x3,%ecx
  27:	83 e2 07             	and    $0x7,%edx
* 2a:	f3 48 a5             	rep movsq %ds:(%rsi),%es:(%rdi) <-- trapping instruction
  2d:	89 d1                	mov    %edx,%ecx
  2f:	f3 a4                	rep movsb %ds:(%rsi),%es:(%rdi)
  31:	31 c0                	xor    %eax,%eax
  33:	0f 01 ca             	clac
  36:	c3                   	retq
  37:	8d 0c ca             	lea    (%rdx,%rcx,8),%ecx
  3a:	89 ca                	mov    %ecx,%edx
  3c:	eb 20                	jmp    0x5e
  3e:	0f                   	.byte 0xf
  3f:	01                   	.byte 0x1