======================================
| WAIT TIMEOUT stdout
|
| [  655.641114][ T8756] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI
| [  655.641456][ T8756] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
[  655.641871][ T8756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 655.642151][ T8756] RIP: 0010:__nh_valid_dump_req (./include/net/netlink.h:1680 net/ipv4/nexthop.c:3404) 
[ 655.642321][ T8756] Code: ea 03 80 3c 02 00 0f 85 ab 02 00 00 48 8b 5e 70 48 85 db 74 73 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 04 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 33
All code
========
   0:	ea                   	(bad)
   1:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   7:	85 ab 02 00 00 48    	test   %ebp,0x48000002(%rbx)
   d:	8b 5e 70             	mov    0x70(%rsi),%ebx
  10:	48 85 db             	test   %rbx,%rbx
  13:	74 73                	je     0x88
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df 
  1f:	48 8d 7b 04          	lea    0x4(%rbx),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
  2a:*	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx		<-- trapping instruction
  2e:	48 89 f8             	mov    %rdi,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 08                	jl     0x43
  3b:	84 d2                	test   %dl,%dl
  3d:	0f                   	.byte 0xf
  3e:	85 33                	test   %esi,(%rbx)

Code starting with the faulting instruction
===========================================
   0:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx
   4:	48 89 f8             	mov    %rdi,%rax
   7:	83 e0 07             	and    $0x7,%eax
   a:	83 c0 03             	add    $0x3,%eax
   d:	38 d0                	cmp    %dl,%al
   f:	7c 08                	jl     0x19
  11:	84 d2                	test   %dl,%dl
  13:	0f                   	.byte 0xf
  14:	85 33                	test   %esi,(%rbx)
[  655.642860][ T8756] RSP: 0018:ffffc90000a3f448 EFLAGS: 00010247
[  655.643099][ T8756] RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffc90000a3f770
[  655.643288][ T8756] RDX: 0000000000000000 RSI: ffffc90000a3f500 RDI: 0000000000000005
[  655.643478][ T8756] RBP: ffffc90000a3f680 R08: ffffc90000a3f770 R09: 0000000000000004
[  655.643668][ T8756] R10: dffffc0000000000 R11: 0000000000000003 R12: ffff8880057d7440
[  655.643874][ T8756] R13: 0000000000000000 R14: ffffc90000a3f500 R15: 0000000000000001
[  655.644065][ T8756] FS:  00007f5256deac40(0000) GS:ffff888036100000(0000) knlGS:0000000000000000
[  655.644336][ T8756] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  655.644592][ T8756] CR2: 00000000004e0178 CR3: 00000000090b6006 CR4: 0000000000770ef0
[  655.644869][ T8756] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  655.645061][ T8756] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  655.645296][ T8756] PKRU: 55555554
[  655.645445][ T8756] Call Trace:
[  655.645593][ T8756]  <TASK>
[ 655.645700][ T8756] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) 
[ 655.645863][ T8756] ? exc_general_protection (arch/x86/kernel/traps.c:701 arch/x86/kernel/traps.c:643) 
[ 655.646078][ T8756] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:564) 
[ 655.646297][ T8756] ? __nh_valid_dump_req (./include/net/netlink.h:1680 net/ipv4/nexthop.c:3404) 
[ 655.646508][ T8756] nh_valid_dump_bucket_req (net/ipv4/nexthop.c:3552) 
[ 655.646720][ T8756] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 655.646939][ T8756] ? __pfx_nh_valid_dump_bucket_req (net/ipv4/nexthop.c:3552) 
[ 655.647208][ T8756] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 655.647421][ T8756] ? netlink_dump (net/netlink/af_netlink.c:2269) 
[ 655.647631][ T8756] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 44)) 
[ 655.647842][ T8756] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 655.648053][ T8756] rtm_dump_nexthop_bucket (net/ipv4/nexthop.c:3676) 
[ 655.648262][ T8756] ? __pfx___mutex_lock (kernel/locking/mutex.c:751) 
[ 655.648472][ T8756] ? __alloc_skb (net/core/skbuff.c:684) 
[ 655.648683][ T8756] ? __pfx_rtm_dump_nexthop_bucket (net/ipv4/nexthop.c:3669) 
[ 655.648985][ T8756] ? __mutex_trylock_common (./arch/x86/include/asm/atomic64_64.h:109 ./include/linux/atomic/atomic-arch-fallback.h:4276 ./include/linux/atomic/atomic-long.h:1476 ./include/linux/atomic/atomic-instrumented.h:4424 kernel/locking/mutex.c:129) 
[ 655.649204][ T8756] netlink_dump (net/netlink/af_netlink.c:2269) 
[ 655.649417][ T8756] ? trace_contention_end (./include/trace/events/lock.h:122 (discriminator 44)) 
[ 655.649628][ T8756] ? __pfx_netlink_dump (net/netlink/af_netlink.c:2197) 
[ 655.649846][ T8756] ? __mutex_lock (./arch/x86/include/asm/preempt.h:94 kernel/locking/mutex.c:618 kernel/locking/mutex.c:752) 
[ 655.650064][ T8756] ? __pfx___netlink_lookup (net/netlink/af_netlink.c:512) 
[ 655.650275][ T8756] ? netlink_lookup (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/netlink/af_netlink.c:539) 
[ 655.650492][ T8756] __netlink_dump_start (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:261 ./include/linux/refcount.h:304 ./include/linux/refcount.h:322 ./include/net/sock.h:1940 net/netlink/af_netlink.c:2388) 
[ 655.650707][ T8756] rtnetlink_rcv_msg (net/core/rtnetlink.c:6555) 
[ 655.650926][ T8756] ? __pfx_rtm_dump_nexthop_bucket (net/ipv4/nexthop.c:3669) 
[ 655.651197][ T8756] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6489) 
[ 655.651412][ T8756] ? __pfx_rtm_dump_nexthop_bucket (net/ipv4/nexthop.c:3669) 
[ 655.651677][ T8756] ? __lock_acquire (kernel/locking/lockdep.c:5137) 
[ 655.651891][ T8756] netlink_rcv_skb (net/netlink/af_netlink.c:2559) 
[ 655.652106][ T8756] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6489) 
[ 655.652321][ T8756] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2536) 
[ 655.652535][ T8756] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) 
[ 655.652758][ T8756] ? __pfx___netlink_lookup (net/netlink/af_netlink.c:512) 
[ 655.652954][ T8756] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) 
[ 655.653151][ T8756] ? netlink_deliver_tap (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 655.653349][ T8756] ? netlink_deliver_tap (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 655.653542][ T8756] ? netlink_deliver_tap (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/netlink/af_netlink.c:340) 
[ 655.653736][ T8756] netlink_unicast (net/netlink/af_netlink.c:1335 net/netlink/af_netlink.c:1361) 
[ 655.653931][ T8756] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1346) 
[ 655.654130][ T8756] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 655.654320][ T8756] ? rcu_read_unlock (./include/linux/rcupdate.h:308 (discriminator 9) ./include/linux/rcupdate.h:783 (discriminator 9)) 
[ 655.654443][ T8756] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 655.654579][ T8756] netlink_sendmsg (net/netlink/af_netlink.c:1905) 
[ 655.654705][ T8756] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1824) 
[ 655.654840][ T8756] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 655.654986][ T8756] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) 
[ 655.655172][ T8756] ? __pfx___sys_sendto (net/socket.c:2161) 
[ 655.655374][ T8756] ? __lock_release (kernel/locking/lockdep.c:5430) 
[ 655.655574][ T8756] ? do_user_addr_fault (arch/x86/mm/fault.c:1436) 
[ 655.655773][ T8756] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) 
[ 655.655966][ T8756] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2735 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3289 kernel/locking/rwsem.c:1347) 
[ 655.656162][ T8756] ? __pfx_find_vma (mm/mmap.c:1883) 
[ 655.656359][ T8756] ? __pfx___up_read (kernel/locking/rwsem.c:1339) 
[ 655.656557][ T8756] ? do_user_addr_fault (arch/x86/mm/fault.c:1436) 
[ 655.656772][ T8756] __x64_sys_sendto (net/socket.c:2199) 
[ 655.656968][ T8756] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) 
[ 655.657217][ T8756] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 655.657413][ T8756] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) 
[  655.657659][ T8756] RIP: 0033:0x7f5256ff3700
[ 655.657866][ T8756] Code: ff ff 64 89 02 eb bd 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 1d 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 68 c3 0f 1f 80 00 00 00 00 41 54 48 83 ec 20
All code
========
   0:	ff                   	(bad)
   1:	ff 64 89 02          	jmp    *0x2(%rcx,%rcx,4)
   5:	eb bd                	jmp    0xffffffffffffffc4
   7:	0f 1f 00             	nopl   (%rax)
   a:	f3 0f 1e fa          	endbr64
   e:	41 89 ca             	mov    %ecx,%r10d
  11:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  18:	00 
  19:	85 c0                	test   %eax,%eax
  1b:	75 1d                	jne    0x3a
  1d:	45 31 c9             	xor    %r9d,%r9d
  20:	45 31 c0             	xor    %r8d,%r8d
  23:	b8 2c 00 00 00       	mov    $0x2c,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 68                	ja     0x9a
  32:	c3                   	ret
  33:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  3a:	41 54                	push   %r12
  3c:	48 83 ec 20          	sub    $0x20,%rsp

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 68                	ja     0x70
   8:	c3                   	ret
   9:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  10:	41 54                	push   %r12
  12:	48 83 ec 20          	sub    $0x20,%rsp
[  655.658557][ T8756] RSP: 002b:00007ffff79f0c48 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[  655.658855][ T8756] RAX: ffffffffffffffda RBX: 0000000000495540 RCX: 00007f5256ff3700
[  655.659150][ T8756] RDX: 0000000000000098 RSI: 00007ffff79f0c50 RDI: 0000000000000005
[  655.659441][ T8756] RBP: 00007ffff79f0c50 R08: 0000000000000000 R09: 0000000000000000
[  655.659733][ T8756] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff


Finger prints:
__nh_valid_dump_req:nh_valid_dump_bucket_req:rtm_dump_nexthop_bucket:netlink_dump