BUG: unable to handle page fault for address: fffffffffffffff1
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 7cae067 P4D 7cae067 PUD 7cb0067 PMD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 313 Comm: syz-executor157 Not tainted syzkaller #0 ff996278633adec6fd25d1632b496761701c4fe9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:snapshot_merge_next_chunks+0x270/0xcb0 drivers/md/dm-snap.c:1057
Code: 83 c3 38 48 89 d8 48 c1 e8 03 80 3c 08 00 74 08 48 89 df e8 22 f7 dd fd 4c 8b 1b 4c 89 ff 4c 89 e6 4c 89 ea 41 ba be 52 3c 7f <45> 03 53 f1 74 02 0f 0b 41 ff d3 0f 1f 00 89 c3 bf 01 00 00 00 89
RSP: 0018:ffffc9000128f8a0 EFLAGS: 00010246

RAX: 1ffffffff1063223 RBX: ffffffff88319118 RCX: dffffc0000000000
RDX: ffffc9000128f940 RSI: ffffc9000128f920 RDI: ffff8881067a8280
RBP: ffffc9000128fa90 R08: ffff888105b695bf R09: 1ffff11020b6d2b7
R10: 000000007f3c52be R11: 0000000000000000 R12: ffffc9000128f920
R13: ffffc9000128f940 R14: ffff888105b695b8 R15: ffff8881067a8280
FS:  00005555580fc3c0(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff1 CR3: 0000000106fb0000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 start_merge drivers/md/dm-snap.c:1167 [inline]
 snapshot_merge_resume+0x256/0x2b0 drivers/md/dm-snap.c:2307
 dm_table_resume_targets+0x23f/0x380 drivers/md/dm-table.c:2041
 __dm_resume+0x25/0x1b0 drivers/md/dm.c:3097
 dm_resume+0x16a/0x1f0 drivers/md/dm.c:3143
 do_resume drivers/md/dm-ioctl.c:1224 [inline]
 dev_suspend+0x3ff/0x700 drivers/md/dm-ioctl.c:1256
 ctl_ioctl drivers/md/dm-ioctl.c:2107 [inline]
 dm_ctl_ioctl+0x8f3/0xde0 drivers/md/dm-ioctl.c:2129
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0x123/0x1b0 fs/ioctl.c:892
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:892
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f4b036ff039
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff1a816fc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fff1a8170f8 RCX: 00007f4b036ff039
RDX: 0000200000000740 RSI: 00000000c138fd06 RDI: 0000000000000003
RBP: 0000000000000001 R08: 00007fff1a8170f8 R09: 00007fff1a8170f8
R10: 0000000000000013 R11: 0000000000000246 R12: 00007fff1a8170e8
R13: 0000000000000002 R14: 00007f4b0378fca0 R15: 0000000000000002
 </TASK>
Modules linked in:
CR2: fffffffffffffff1
---[ end trace 0000000000000000 ]---
RIP: 0010:snapshot_merge_next_chunks+0x270/0xcb0 drivers/md/dm-snap.c:1057
Code: 83 c3 38 48 89 d8 48 c1 e8 03 80 3c 08 00 74 08 48 89 df e8 22 f7 dd fd 4c 8b 1b 4c 89 ff 4c 89 e6 4c 89 ea 41 ba be 52 3c 7f <45> 03 53 f1 74 02 0f 0b 41 ff d3 0f 1f 00 89 c3 bf 01 00 00 00 89
RSP: 0018:ffffc9000128f8a0 EFLAGS: 00010246
RAX: 1ffffffff1063223 RBX: ffffffff88319118 RCX: dffffc0000000000
RDX: ffffc9000128f940 RSI: ffffc9000128f920 RDI: ffff8881067a8280
RBP: ffffc9000128fa90 R08: ffff888105b695bf R09: 1ffff11020b6d2b7
R10: 000000007f3c52be R11: 0000000000000000 R12: ffffc9000128f920
R13: ffffc9000128f940 R14: ffff888105b695b8 R15: ffff8881067a8280
FS:  00005555580fc3c0(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff1 CR3: 0000000106fb0000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	83 c3 38             	add    $0x38,%ebx
   3:	48 89 d8             	mov    %rbx,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1)
   e:	74 08                	je     0x18
  10:	48 89 df             	mov    %rbx,%rdi
  13:	e8 22 f7 dd fd       	call   0xfdddf73a
  18:	4c 8b 1b             	mov    (%rbx),%r11
  1b:	4c 89 ff             	mov    %r15,%rdi
  1e:	4c 89 e6             	mov    %r12,%rsi
  21:	4c 89 ea             	mov    %r13,%rdx
  24:	41 ba be 52 3c 7f    	mov    $0x7f3c52be,%r10d
* 2a:	45 03 53 f1          	add    -0xf(%r11),%r10d <-- trapping instruction
  2e:	74 02                	je     0x32
  30:	0f 0b                	ud2
  32:	41 ff d3             	call   *%r11
  35:	0f 1f 00             	nopl   (%rax)
  38:	89 c3                	mov    %eax,%ebx
  3a:	bf 01 00 00 00       	mov    $0x1,%edi
  3f:	89                   	.byte 0x89