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:00007f078086e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f078246f160 RCX: 00007f0782247969
RDX: 0000000000100002 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 00007f07822c9ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f078246f160 R15: 00007ffefb75aff8
---[ end trace bcb7ec710bff2986 ]---
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: 5400 Comm: syz.3.1472 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:ffffc90001db7c20 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88811d39c108 RCX: ffffffff84739e7c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001db7ba0
RBP: ffffc90001db7d10 R08: dffffc0000000000 R09: fffff520003b6f75
R10: fffff520003b6f75 R11: 1ffff920003b6f74 R12: ffff88811d39c0d0
R13: ffffe8ffffd20ac0 R14: 000000000000001a R15: 00000000000000d0
FS:  00007f078086e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed20224 CR3: 000000012e653000 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: 0033:0x7f0782247969
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:00007f078086e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f078246f160 RCX: 00007f0782247969
RDX: 0000000000100002 RSI: 0000000000004c81 RDI: 0000000000000003
RBP: 00007f07822c9ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f078246f160 R15: 00007ffefb75aff8
Modules linked in:
---[ end trace bcb7ec710bff2987 ]---
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:ffffc90001db7c20 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88811d39c108 RCX: ffffffff84739e7c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001db7ba0
RBP: ffffc90001db7d10 R08: dffffc0000000000 R09: fffff520003b6f75
R10: fffff520003b6f75 R11: 1ffff920003b6f74 R12: ffff88811d39c0d0
R13: ffffe8ffffd20ac0 R14: 000000000000001a R15: 00000000000000d0
FS:  00007f078086e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ed20224 CR3: 000000012e653000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	ff c3                	inc    %ebx
   2:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   9:	00 00 00
   c:	0f 1f 40 00          	nopl   0x0(%rax)
  10:	48 89 f8             	mov    %rdi,%rax
  13:	48 89 f7             	mov    %rsi,%rdi
  16:	48 89 d6             	mov    %rdx,%rsi
  19:	48 89 ca             	mov    %rcx,%rdx
  1c:	4d 89 c2             	mov    %r8,%r10
  1f:	4d 89 c8             	mov    %r9,%r8
  22:	4c 8b 4c 24 08       	mov    0x8(%rsp),%r9
  27:	0f 05                	syscall
* 29:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax <-- trapping instruction
  2f:	73 01                	jae    0x32
  31:	c3                   	ret
  32:	48 c7 c1 a8 ff ff ff 	mov    $0xffffffffffffffa8,%rcx
  39:	f7 d8                	neg    %eax
  3b:	64 89 01             	mov    %eax,%fs:(%rcx)
  3e:	48                   	rex.W