BUG: stack guard page was hit at ffffc90008cc7fb8 (stack is ffffc90008cc8000..ffffc90008ccffff)
kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 22073 Comm: syz-executor.4 Not tainted 5.10.109-syzkaller-00693-g414e6c8e941c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pvclock_clocksource_read+0x4f/0x630 arch/x86/kernel/pvclock.c:68
Code: 18 48 8d 77 1c 4c 8d 57 10 48 83 c7 1d 4d 8d 5d 03 4c 89 ea 48 c1 ea 03 4c 89 d9 48 c1 e9 03 49 8d 58 07 4c 89 c0 48 c1 e8 03 <48> 89 85 68 ff ff ff 48 89 d8 48 89 5d 88 48 c1 eb 03 48 89 9d 70
RSP: 0018:ffffc90008cc7fc8 EFLAGS: 00010806
RAX: 1ffffffff0d85809 RBX: ffffffff86c2c04f RCX: 1ffffffff0d85808
RDX: 1ffffffff0d85808 RSI: ffffffff86c2c05c RDI: ffffffff86c2c05d
RBP: ffffc90008cc8068 R08: ffffffff86c2c048 R09: ffffffff86c2c058
R10: ffffffff86c2c050 R11: ffffffff86c2c043 R12: dffffc0000000000
R13: ffffffff86c2c040 R14: ffff8881188893c0 R15: dffffc0000000000
FS:  00007f5e102a0700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90008cc7fb8 CR3: 00000001191f3000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
---[ end trace 515fd7d5a0d9b720 ]---
RIP: 0010:pvclock_clocksource_read+0x4f/0x630 arch/x86/kernel/pvclock.c:68
Code: 18 48 8d 77 1c 4c 8d 57 10 48 83 c7 1d 4d 8d 5d 03 4c 89 ea 48 c1 ea 03 4c 89 d9 48 c1 e9 03 49 8d 58 07 4c 89 c0 48 c1 e8 03 <48> 89 85 68 ff ff ff 48 89 d8 48 89 5d 88 48 c1 eb 03 48 89 9d 70
RSP: 0018:ffffc90008cc7fc8 EFLAGS: 00010806
RAX: 1ffffffff0d85809 RBX: ffffffff86c2c04f RCX: 1ffffffff0d85808
RDX: 1ffffffff0d85808 RSI: ffffffff86c2c05c RDI: ffffffff86c2c05d
RBP: ffffc90008cc8068 R08: ffffffff86c2c048 R09: ffffffff86c2c058
R10: ffffffff86c2c050 R11: ffffffff86c2c043 R12: dffffc0000000000
R13: ffffffff86c2c040 R14: ffff8881188893c0 R15: dffffc0000000000
FS:  00007f5e102a0700(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90008cc7fb8 CR3: 00000001191f3000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	18 48 8d             	sbb    %cl,-0x73(%rax)
   3:	77 1c                	ja     0x21
   5:	4c 8d 57 10          	lea    0x10(%rdi),%r10
   9:	48 83 c7 1d          	add    $0x1d,%rdi
   d:	4d 8d 5d 03          	lea    0x3(%r13),%r11
  11:	4c 89 ea             	mov    %r13,%rdx
  14:	48 c1 ea 03          	shr    $0x3,%rdx
  18:	4c 89 d9             	mov    %r11,%rcx
  1b:	48 c1 e9 03          	shr    $0x3,%rcx
  1f:	49 8d 58 07          	lea    0x7(%r8),%rbx
  23:	4c 89 c0             	mov    %r8,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	48 89 85 68 ff ff ff 	mov    %rax,-0x98(%rbp) <-- trapping instruction
  31:	48 89 d8             	mov    %rbx,%rax
  34:	48 89 5d 88          	mov    %rbx,-0x78(%rbp)
  38:	48 c1 eb 03          	shr    $0x3,%rbx
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	9d                   	popfq
  3f:	70                   	.byte 0x70