general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 PID: 8 Comm: kworker/u4:0 Not tainted 5.15.0-rc1-next-20210916-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:276 [inline]
RIP: 0010:hrtimer_active+0x6b/0x1f0 kernel/time/hrtimer.c:1611
Code: 01 f0 48 89 44 24 10 e8 83 88 10 00 48 8b 44 24 08 80 38 00 0f 85 71 01 00 00 49 8b 6d 30 48 8d 45 10 48 89 04 24 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 42 01 00 00 8b 5d 10 31 ff
RSP: 0018:ffffc90000cd7910 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffffe8fffd4bf158 RCX: 0000000000000000
RDX: ffff888010e45580 RSI: ffffffff81658d9d RDI: ffffe8fffd4bf158
RBP: 0000000000000000 R08: 0000000000000001 R09: 00000000fd4bef00
R10: ffffffff871bb70d R11: 0000000000000000 R12: 0000000000000000
R13: ffffe8fffd4bf158 R14: dffffc0000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0124d5bb0 CR3: 00000000473bb000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hrtimer_try_to_cancel+0x21/0x1e0 kernel/time/hrtimer.c:1328
 hrtimer_cancel+0x13/0x40 kernel/time/hrtimer.c:1443
 napi_disable+0xc3/0x110 net/core/dev.c:6911
 gro_cells_destroy net/core/gro_cells.c:101 [inline]
 gro_cells_destroy+0x10d/0x360 net/core/gro_cells.c:92
 ip_tunnel_dev_free+0x15/0x60 net/ipv4/ip_tunnel.c:1010
 netdev_run_todo+0x6b4/0xa80 net/core/dev.c:10591
 ip_tunnel_delete_nets+0x3a4/0x5b0 net/ipv4/ip_tunnel.c:1124
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:591
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace bfaaa0445df7f3f4 ]---
RIP: 0010:__seqprop_raw_spinlock_sequence include/linux/seqlock.h:276 [inline]
RIP: 0010:hrtimer_active+0x6b/0x1f0 kernel/time/hrtimer.c:1611
Code: 01 f0 48 89 44 24 10 e8 83 88 10 00 48 8b 44 24 08 80 38 00 0f 85 71 01 00 00 49 8b 6d 30 48 8d 45 10 48 89 04 24 48 c1 e8 03 <42> 0f b6 04 30 84 c0 74 08 3c 03 0f 8e 42 01 00 00 8b 5d 10 31 ff
RSP: 0018:ffffc90000cd7910 EFLAGS: 00010202
RAX: 0000000000000002 RBX: ffffe8fffd4bf158 RCX: 0000000000000000
RDX: ffff888010e45580 RSI: ffffffff81658d9d RDI: ffffe8fffd4bf158
RBP: 0000000000000000 R08: 0000000000000001 R09: 00000000fd4bef00
R10: ffffffff871bb70d R11: 0000000000000000 R12: 0000000000000000
R13: ffffe8fffd4bf158 R14: dffffc0000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1fe77fc718 CR3: 00000000096ea000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	01 f0                	add    %esi,%eax
   2:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
   7:	e8 83 88 10 00       	callq  0x10888f
   c:	48 8b 44 24 08       	mov    0x8(%rsp),%rax
  11:	80 38 00             	cmpb   $0x0,(%rax)
  14:	0f 85 71 01 00 00    	jne    0x18b
  1a:	49 8b 6d 30          	mov    0x30(%r13),%rbp
  1e:	48 8d 45 10          	lea    0x10(%rbp),%rax
  22:	48 89 04 24          	mov    %rax,(%rsp)
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	74 08                	je     0x3b
  33:	3c 03                	cmp    $0x3,%al
  35:	0f 8e 42 01 00 00    	jle    0x17d
  3b:	8b 5d 10             	mov    0x10(%rbp),%ebx
  3e:	31 ff                	xor    %edi,%edi