======================================
| [ 6.907862] #PF: supervisor read access in kernel mode
| [ 6.907901] #PF: error_code(0x0000) - not-present page
| [ 6.907938] PGD 2ad2067 P4D 2ad2067 PUD 2af2067 PMD 0
| [ 6.907980] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 6.908082] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 6.908162] RIP: 0010:__inet_csk_reqsk_queue_drop (net/ipv4/inet_connection_sock.c:1042 net/ipv4/inet_connection_sock.c:1058)
[ 6.908212] Code: 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 41 56 41 55 45 31 ed 41 54 55 48 89 f5 53 <48> 83 7e 70 00 89 d3 74 35 48 8b 46 30 49 89 fc 48 8b 90 40 03 00
All code
========
0: 00 00 add %al,(%rax)
2: 00 0f add %cl,(%rdi)
4: 1f (bad)
5: 40 00 90 90 90 90 90 rex add %dl,-0x6f6f6f70(%rax)
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1c: 41 56 push %r14
1e: 41 55 push %r13
20: 45 31 ed xor %r13d,%r13d
23: 41 54 push %r12
25: 55 push %rbp
26: 48 89 f5 mov %rsi,%rbp
29: 53 push %rbx
2a:* 48 83 7e 70 00 cmpq $0x0,0x70(%rsi) <-- trapping instruction
2f: 89 d3 mov %edx,%ebx
31: 74 35 je 0x68
33: 48 8b 46 30 mov 0x30(%rsi),%rax
37: 49 89 fc mov %rdi,%r12
3a: 48 rex.W
3b: 8b .byte 0x8b
3c: 90 nop
3d: 40 03 00 rex add (%rax),%eax
Code starting with the faulting instruction
===========================================
0: 48 83 7e 70 00 cmpq $0x0,0x70(%rsi)
5: 89 d3 mov %edx,%ebx
7: 74 35 je 0x3e
9: 48 8b 46 30 mov 0x30(%rsi),%rax
d: 49 89 fc mov %rdi,%r12
10: 48 rex.W
11: 8b .byte 0x8b
12: 90 nop
13: 40 03 00 rex add (%rax),%eax
[ 6.908329] RSP: 0018:ffffaa8c00124e68 EFLAGS: 00010246
[ 6.908366] RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000200
[ 6.908420] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff926e43d50000
[ 6.908474] RBP: 0000000000000000 R08: 0000000000000009 R09: ffff926e7ed1d1e8
[ 6.908521] R10: 0000000000000200 R11: ffffaa8c00124ff8 R12: 0000000000000000
[ 6.908568] R13: 0000000000000000 R14: dead000000000122 R15: ffff926e43d50000
[ 6.908618] FS: 0000000000000000(0000) GS:ffff926e7ed00000(0000) knlGS:0000000000000000
[ 6.908670] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.908716] CR2: 0000000000000070 CR3: 000000000263a001 CR4: 0000000000772ef0
[ 6.908779] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 6.908831] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 6.908883] PKRU: 55555554
[ 6.908903] Call Trace:
[ 6.908923]
[ 6.908948] ? __die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434)
[ 6.908983] ? page_fault_oops (arch/x86/mm/fault.c:715)
[ 6.909011] ? exc_page_fault (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/mm/fault.c:1489 arch/x86/mm/fault.c:1539)
[ 6.909041] ? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:623)
[ 6.909071] ? __inet_csk_reqsk_queue_drop (net/ipv4/inet_connection_sock.c:1042 net/ipv4/inet_connection_sock.c:1058)
[ 6.909108] reqsk_timer_handler (./include/net/request_sock.h:148 net/ipv4/inet_connection_sock.c:1194)
[ 6.909145] ? __pfx_reqsk_timer_handler (net/ipv4/inet_connection_sock.c:1085)
[ 6.909184] ? __pfx_reqsk_timer_handler (net/ipv4/inet_connection_sock.c:1085)
[ 6.909222] call_timer_fn (kernel/time/timer.c:1794)
[ 6.909252] __run_timer_base.part.0 (kernel/time/timer.c:1846 kernel/time/timer.c:2419 kernel/time/timer.c:2430)
[ 6.909289] ? __pfx_tick_nohz_handler (kernel/time/tick-sched.c:285)
[ 6.909326] ? __hrtimer_run_queues (kernel/time/hrtimer.c:1706 kernel/time/hrtimer.c:1755)
[ 6.909364] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86)
[ 6.909402] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 3) kernel/time/timekeeping.c:395 (discriminator 3) kernel/time/timekeeping.c:403 (discriminator 3) kernel/time/timekeeping.c:850 (discriminator 3))
[ 6.909432] run_timer_softirq (kernel/time/timer.c:2437 kernel/time/timer.c:2449)
[ 6.909462] handle_softirqs (kernel/softirq.c:554)
[ 6.909492] irq_exit_rcu (kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637 kernel/softirq.c:649)
[ 6.909521] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1037 arch/x86/kernel/apic/apic.c:1037)
[ 6.909561]
[ 6.909581]
[ 6.909597] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702)
[ 6.909637] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:92 arch/x86/kernel/process.c:743)
[ 6.909668] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d e3 79 29 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
0: 4c 01 c7 add %r8,%rdi
3: 4c 29 c2 sub %r8,%rdx
6: e9 72 ff ff ff jmp 0xffffffffffffff7d
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 90 nop
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: f3 0f 1e fa endbr64
1f: 66 90 xchg %ax,%ax
21: 0f 00 2d e3 79 29 00 verw 0x2979e3(%rip) # 0x297a0b
28: fb sti
29: f4 hlt
2a:* fa cli <-- trapping instruction
2b: c3 ret
2c: cc int3
2d: cc int3
2e: cc int3
2f: cc int3
30: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
37: 00 00 00 00
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop
Code starting with the faulting instruction
===========================================
0: fa cli
1: c3 ret
2: cc int3
3: cc int3
4: cc int3
5: cc int3
6: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
d: 00 00 00 00
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
[ 6.909804] RSP: 0018:ffffaa8c000bbee8 EFLAGS: 00000242
[ 6.909848] RAX: ffff926e7ed00000 RBX: ffff926e41301700 RCX: 000000019b91f040
[ 6.909915] RDX: 0000000000000002 RSI: ffffffffb9a7d373 RDI: 0000000000058544
[ 6.909980] RBP: 0000000000000002 R08: 0000000000058544 R09: 000000019b91f040
[ 6.910045] R10: 0000000000000001 R11: 0000000000000004 R12: 0000000000000000
[ 6.910113] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[ 6.910180] default_idle_call (./include/linux/cpuidle.h:144 kernel/sched/idle.c:118)
[ 6.910218] do_idle (kernel/sched/idle.c:186 kernel/sched/idle.c:326)
[ 6.910258] cpu_startup_entry (kernel/sched/idle.c:423 (discriminator 1))
[ 6.910296] start_secondary (arch/x86/kernel/smpboot.c:314)
Finger prints:
__inet_csk_reqsk_queue_drop:reqsk_timer_handler:call_timer_fn:run_timer_softirq:handle_softirqs