RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 00007ffd2bbcb9a0 R11: 0000000000000246 R12: 00007ffd2bbcbf3c
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
---[ end trace 00d4f81ea4515760 ]---
stack segment: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 304 Comm: syz-executor547 Tainted: G        W         5.4.147-syzkaller-00036-geb4a5a5dbd5b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:kill_device drivers/base/core.c:3022 [inline]
RIP: 0010:device_del+0xa3/0xf60 drivers/base/core.c:3049
Code: 00 74 08 4c 89 e7 e8 cc 75 0e ff 48 89 1c 24 41 bf c8 00 00 00 4d 03 3c 24 4c 89 fd 48 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <8a> 44 05 00 84 c0 0f 85 33 0e 00 00 45 0f b6 2f 44 89 eb 83 e3 01
RSP: 0018:ffff8881de787ce0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881de69a070 RCX: 1ffff1103bcd341b
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881de787ca0
RBP: 0000000000000019 R08: dffffc0000000000 R09: ffffed103bcf0f95
R10: ffffed103bcf0f95 R11: 0000000000000000 R12: ffff8881de69a0d8
R13: 1ffff1103bcd3485 R14: ffff8881de69a110 R15: 00000000000000c8
FS:  0000555556662300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbcea846130 CR3: 00000001de5dd000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 del_gendisk+0x94f/0xb70 block/genhd.c:835
 loop_remove drivers/block/loop.c:2189 [inline]
 loop_control_ioctl+0x563/0x680 drivers/block/loop.c:2288
 do_vfs_ioctl+0x6fb/0x15b0 fs/ioctl.c:47
 ksys_ioctl fs/ioctl.c:742 [inline]
 __do_sys_ioctl fs/ioctl.c:749 [inline]
 __se_sys_ioctl fs/ioctl.c:747 [inline]
 __x64_sys_ioctl+0xd4/0x110 fs/ioctl.c:747
 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fbcea7d5079
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd2bbcbf28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000000050f0 RCX: 00007fbcea7d5079
RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 00007ffd2bbcb9a0 R11: 0000000000000246 R12: 00007ffd2bbcbf3c
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace 00d4f81ea4515761 ]---
RIP: 0010:kill_device drivers/base/core.c:3022 [inline]
RIP: 0010:device_del+0xa3/0xf60 drivers/base/core.c:3049
Code: 00 74 08 4c 89 e7 e8 cc 75 0e ff 48 89 1c 24 41 bf c8 00 00 00 4d 03 3c 24 4c 89 fd 48 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <8a> 44 05 00 84 c0 0f 85 33 0e 00 00 45 0f b6 2f 44 89 eb 83 e3 01
RSP: 0018:ffff8881de787ce0 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881de69a070 RCX: 1ffff1103bcd341b
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8881de787ca0
RBP: 0000000000000019 R08: dffffc0000000000 R09: ffffed103bcf0f95
R10: ffffed103bcf0f95 R11: 0000000000000000 R12: ffff8881de69a0d8
R13: 1ffff1103bcd3485 R14: ffff8881de69a110 R15: 00000000000000c8
FS:  0000555556662300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005645d8ec00c8 CR3: 00000001de5dd000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 74 08 4c          	add    %dh,0x4c(%rax,%rcx,1)
   4:	89 e7                	mov    %esp,%edi
   6:	e8 cc 75 0e ff       	callq  0xff0e75d7
   b:	48 89 1c 24          	mov    %rbx,(%rsp)
   f:	41 bf c8 00 00 00    	mov    $0xc8,%r15d
  15:	4d 03 3c 24          	add    (%r12),%r15
  19:	4c 89 fd             	mov    %r15,%rbp
  1c:	48 c1 ed 03          	shr    $0x3,%rbp
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	8a 44 05 00          	mov    0x0(%rbp,%rax,1),%al <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 33 0e 00 00    	jne    0xe69
  36:	45 0f b6 2f          	movzbl (%r15),%r13d
  3a:	44 89 eb             	mov    %r13d,%ebx
  3d:	83 e3 01             	and    $0x1,%ebx