RBP: 00007f43812b7ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f438145d160 R15: 00007ffd28b0df38
---[ end trace b9539bf134d99681 ]---
general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7]
CPU: 0 PID: 5069 Comm: syz.0.1372 Tainted: G        W         5.10.236-syzkaller-00012-gab07aeb2c93d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:kill_device drivers/base/core.c:3387 [inline]
RIP: 0010:device_del+0xea/0xed0 drivers/base/core.c:3415
Code: 74 08 4c 89 e7 e8 36 52 f3 fe 41 bf d0 00 00 00 4c 89 64 24 28 4d 03 3c 24 4d 89 fe 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 0f 85 1f 0d 00 00 45 0f b6 27 44 89 e6 83 e6
RSP: 0018:ffffc90001027c20 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88812c7d7108 RCX: ffffffff84739e7c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001027ba0
RBP: ffffc90001027d10 R08: dffffc0000000000 R09: fffff52000204f75
R10: fffff52000204f75 R11: 1ffff92000204f74 R12: ffff88812c7d70d0
R13: ffffe8ffffd1af80 R14: 000000000000001a R15: 00000000000000d0
FS:  00007f437f85c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffe8 CR3: 000000011dbce000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 del_gendisk+0x834/0x9e0 block/genhd.c:953
 loop_remove+0x46/0xb0 drivers/block/loop.c:2210
 loop_control_ioctl+0x487/0x550 drivers/block/loop.c:2309
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f4381235969
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f437f85c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f438145d160 RCX: 00007f4381235969
RDX: 0000000000100002 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 00007f43812b7ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f438145d160 R15: 00007ffd28b0df38
Modules linked in:
---[ end trace b9539bf134d99682 ]---
RIP: 0010:kill_device drivers/base/core.c:3387 [inline]
RIP: 0010:device_del+0xea/0xed0 drivers/base/core.c:3415
Code: 74 08 4c 89 e7 e8 36 52 f3 fe 41 bf d0 00 00 00 4c 89 64 24 28 4d 03 3c 24 4d 89 fe 49 c1 ee 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 06 84 c0 0f 85 1f 0d 00 00 45 0f b6 27 44 89 e6 83 e6
RSP: 0018:ffffc90001027c20 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88812c7d7108 RCX: ffffffff84739e7c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001027ba0
RBP: ffffc90001027d10 R08: dffffc0000000000 R09: fffff52000204f75
R10: fffff52000204f75 R11: 1ffff92000204f74 R12: ffff88812c7d70d0
R13: ffffe8ffffd1af80 R14: 000000000000001a R15: 00000000000000d0
FS:  00007f437f85c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffe8 CR3: 000000011dbce000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	74 08                	je     0xa
   2:	4c 89 e7             	mov    %r12,%rdi
   5:	e8 36 52 f3 fe       	call   0xfef35240
   a:	41 bf d0 00 00 00    	mov    $0xd0,%r15d
  10:	4c 89 64 24 28       	mov    %r12,0x28(%rsp)
  15:	4d 03 3c 24          	add    (%r12),%r15
  19:	4d 89 fe             	mov    %r15,%r14
  1c:	49 c1 ee 03          	shr    $0x3,%r14
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	41 0f b6 04 06       	movzbl (%r14,%rax,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 1f 0d 00 00    	jne    0xd56
  37:	45 0f b6 27          	movzbl (%r15),%r12d
  3b:	44 89 e6             	mov    %r12d,%esi
  3e:	83                   	.byte 0x83
  3f:	e6                   	.byte 0xe6