kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 8725 Comm: kworker/0:3 Not tainted 4.14.262-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krxrpcd rxrpc_process_call
task: ffff88808f8ea080 task.stack: ffff88808f960000
RIP: 0010:__read_once_size include/linux/compiler.h:185 [inline]
RIP: 0010:atomic_read arch/x86/include/asm/atomic.h:27 [inline]
RIP: 0010:refcount_read include/linux/refcount.h:42 [inline]
RIP: 0010:rxrpc_get_skb+0x60/0x350 net/rxrpc/skbuff.c:52
RSP: 0018:ffff88808f967c60 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 000000000000001c RSI: 000000000000000a RDI: 00000000000000e4
RBP: 0000000000000000 R08: ffffffff8b9b17c0 R09: 00000000000406de
R10: ffff88808f8ea958 R11: ffff88808f8ea080 R12: 000000000000000a
R13: ffffffff8c9beae0 R14: dffffc0000000000 R15: ffff8880931af118
FS:  0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020200030 CR3: 0000000098b82000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rxrpc_resend net/rxrpc/call_event.c:319 [inline]
 rxrpc_process_call+0x77f/0x1190 net/rxrpc/call_event.c:407
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: a0 ea 9b 8c 4c 0f 46 e8 e8 1e 58 d5 fa f0 41 0f c1 6d 00 48 8d bb e4 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
RIP: __read_once_size include/linux/compiler.h:185 [inline] RSP: ffff88808f967c60
RIP: atomic_read arch/x86/include/asm/atomic.h:27 [inline] RSP: ffff88808f967c60
RIP: refcount_read include/linux/refcount.h:42 [inline] RSP: ffff88808f967c60
RIP: rxrpc_get_skb+0x60/0x350 net/rxrpc/skbuff.c:52 RSP: ffff88808f967c60
---[ end trace c349761bd351a6b5 ]---
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	9b                   	fwait
   1:	8c 4c 0f 46          	mov    %cs,0x46(%rdi,%rcx,1)
   5:	e8 e8 1e 58 d5       	callq  0xd5581ef2
   a:	fa                   	cli
   b:	f0 41 0f c1 6d 00    	lock xadd %ebp,0x0(%r13)
  11:	48 8d bb e4 00 00 00 	lea    0xe4(%rbx),%rdi
  18:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1f:	fc ff df
  22:	48 89 fa             	mov    %rdi,%rdx
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2d:	48 89 f8             	mov    %rdi,%rax
  30:	83 e0 07             	and    $0x7,%eax
  33:	83 c0 03             	add    $0x3,%eax
  36:	38 d0                	cmp    %dl,%al
  38:	7c 08                	jl     0x42
  3a:	84 d2                	test   %dl,%dl
  3c:	0f                   	.byte 0xf
  3d:	85                   	.byte 0x85