R13: 00007f4675974038 R14: 00007f4675973fa0 R15: 00007ffff9624368
---[ end trace 4a4024950b8f0cc4 ]---
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: 3604 Comm: syz.8.774 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:kill_device drivers/base/core.c:3388 [inline]
RIP: 0010:device_del+0xe0/0xe60 drivers/base/core.c:3416
Code: 42 80 3c 30 00 74 08 4c 89 ef e8 5b f4 ef fe 41 bf d0 00 00 00 4d 03 7d 00 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 b7 0c 00 00 45 0f b6 27 44 89 e6 83 e6
RSP: 0018:ffffc90001557980 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88812642b108 RCX: ffffffff84823af2
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001557900
RBP: ffffc90001557a78 R08: ffffc90001557907 R09: 1ffff920002aaf20
R10: dffffc0000000000 R11: fffff520002aaf21 R12: ffff88812642b068
R13: ffff88812642b0d0 R14: 000000000000001a R15: 00000000000000d0
FS:  00007f46741456c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa580c4cff8 CR3: 000000010eb61000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 del_gendisk+0x85d/0xa10 block/genhd.c:953
 cleanup_mapped_device+0x16c/0x270 drivers/md/dm.c:1771
 alloc_dev drivers/md/dm.c:1903 [inline]
 dm_create+0xb03/0xdd0 drivers/md/dm.c:2081
 dev_create+0x12e/0x2c0 drivers/md/dm-ioctl.c:784
 ctl_ioctl drivers/md/dm-ioctl.c:1925 [inline]
 dm_ctl_ioctl+0x8ee/0xca0 drivers/md/dm-ioctl.c:1947
 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: 0033:0x7f46756ed559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4674145028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4675973fa0 RCX: 00007f46756ed559
RDX: 0000200000000380 RSI: 00000000c138fd03 RDI: 0000000000000007
RBP: 00007f4675784b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4675974038 R14: 00007f4675973fa0 R15: 00007ffff9624368
Modules linked in:
---[ end trace 4a4024950b8f0cc5 ]---
RIP: 0010:kill_device drivers/base/core.c:3388 [inline]
RIP: 0010:device_del+0xe0/0xe60 drivers/base/core.c:3416
Code: 42 80 3c 30 00 74 08 4c 89 ef e8 5b f4 ef fe 41 bf d0 00 00 00 4d 03 7d 00 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 b7 0c 00 00 45 0f b6 27 44 89 e6 83 e6
RSP: 0018:ffffc90001557980 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88812642b108 RCX: ffffffff84823af2
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001557900
RBP: ffffc90001557a78 R08: ffffc90001557907 R09: 1ffff920002aaf20
R10: dffffc0000000000 R11: fffff520002aaf21 R12: ffff88812642b068
R13: ffff88812642b0d0 R14: 000000000000001a R15: 00000000000000d0
FS:  00007f46741456c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f884f3a1dac CR3: 000000010eb61000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
   5:	74 08                	je     0xf
   7:	4c 89 ef             	mov    %r13,%rdi
   a:	e8 5b f4 ef fe       	call   0xfeeff46a
   f:	41 bf d0 00 00 00    	mov    $0xd0,%r15d
  15:	4d 03 7d 00          	add    0x0(%r13),%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 b7 0c 00 00    	jne    0xcee
  37:	45 0f b6 27          	movzbl (%r15),%r12d
  3b:	44 89 e6             	mov    %r12d,%esi
  3e:	83                   	.byte 0x83
  3f:	e6                   	.byte 0xe6