Re: [linux-next] oops in ip_route_input_noref
flat view
From: Richard Alpe <hidden>
Date: 2015-09-16 12:05:55
Also in:
lkml
On 2015-09-16 11:24, Sergey Senozhatsky wrote:
Hi,
4.3.0-rc1-next-20150916
oops after removal of rndis usb device
...
ffffffff8146c052: 00
ffffffff8146c053: 0f b6 55 8a movzbl -0x76(%rbp),%edx
ffffffff8146c057: 49 8b bf e8 01 00 00 mov 0x1e8(%r15),%rdi
ffffffff8146c05e: 45 89 d1 mov %r10d,%r9d
ffffffff8146c061: 44 89 f6 mov %r14d,%esi
ffffffff8146c064: 44 88 95 70 ff ff ff mov %r10b,-0x90(%rbp)
ffffffff8146c06b: 0f 95 c1 setne %cl
ffffffff8146c06e: 81 ce 00 00 00 80 or $0x80000000,%esi
ffffffff8146c074: 41 83 e1 01 and $0x1,%r9d
ffffffff8146c078: 45 31 c0 xor %r8d,%r8d
ffffffff8146c07b: e8 49 d5 ff ff callq ffffffff814695c9 <rt_dst_alloc>
ffffffff8146c080: 48 85 c0 test %rax,%rax
ffffffff8146c083: 49 89 c5 mov %rax,%r13
ffffffff8146c086: 75 0a jne ffffffff8146c092 <ip_route_input_noref+0xa75>
ffffffff8146c088: bb 97 ff ff ff mov $0xffffff97,%ebx
ffffffff8146c08d: e9 06 f8 ff ff jmpq ffffffff8146b898 <ip_route_input_noref+0x27b>
ffffffff8146c092: 48 c7 40 58 a3 95 46 movq $0xffffffff814695a3,0x58(%rax)
ffffffff8146c099: 81
ffffffff8146c09a: c6 80 a2 00 00 00 01 movb $0x1,0xa2(%rax)
ffffffff8146c0a1: 48 8b 45 98 mov -0x68(%rbp),%rax
ffffffff8146c0a5: 44 8a 95 70 ff ff ff mov -0x90(%rbp),%r10b
ffffffff8146c0ac: 48 85 c0 test %rax,%rax
ffffffff8146c0af: 74 0a je ffffffff8146c0bb <ip_route_input_noref+0xa9e>
ffffffff8146c0b1: 8b 40 10 mov 0x10(%rax),%eax
^^^^^^^
ffffffff8146c0b4: 41 89 85 b0 00 00 00 mov %eax,0xb0(%r13)
ffffffff8146c0bb: 65 ff 05 9e 54 ba 7e incl %gs:0x7eba549e(%rip) # 11560 <rt_cache_stat>
ffffffff8146c0c2: 80 7d 8a 07 cmpb $0x7,-0x76(%rbp)
ffffffff8146c0c6: 75 1a jne ffffffff8146c0e2 <ip_route_input_noref+0xac5>
ffffffff8146c0c8: 41 81 a5 9c 00 00 00 andl $0x7fffffff,0x9c(%r13)
ffffffff8146c0cf: ff ff ff 7f
ffffffff8146c0d3: f7 db neg %ebx
ffffffff8146c0d5: 49 c7 45 50 b1 96 46 movq $0xffffffff814696b1,0x50(%r13)
ffffffff8146c0dc: 81
ffffffff8146c0dd: 66 41 89 5d 64 mov %bx,0x64(%r13)
ffffffff8146c0e2: 45 84 d2 test %r10b,%r10b
ffffffff8146c0e5: 74 29 je ffffffff8146c110 <ip_route_input_noref+0xaf3>
ffffffff8146c0e7: 0f b6 7d 89 movzbl -0x77(%rbp),%edi
ffffffff8146c0eb: 4c 89 ee mov %r13,%rsi
ffffffff8146c0ee: 48 ff c7 inc %rdi
ffffffff8146c0f1: 48 6b ff 60 imul $0x60,%rdi,%rdi
ffffffff8146c0f5: 48 03 7d 90 add -0x70(%rbp),%rdi
ffffffff8146c0f9: e8 10 d1 ff ff callq ffffffff8146920e <rt_cache_route>
ffffffff8146c0fe: 84 c0 test %al,%al
ffffffff8146c100: 75 0e jne ffffffff8146c110 <ip_route_input_noref+0xaf3>
ffffffff8146c102: 66 41 83 4d 60 10 orw $0x10,0x60(%r13)
ffffffff8146c108: 4c 89 ef mov %r13,%rdi
ffffffff8146c10b: e8 7d cc ff ff callq ffffffff81468d8d <rt_add_uncached_list>
ffffffff8146c110: 4d 89 6c 24 58 mov %r13,0x58(%r12)
ffffffff8146c115: 31 db xor %ebx,%ebx
ffffffff8146c117: e9 7c f7 ff ff jmpq ffffffff8146b898 <ip_route_input_noref+0x27b>
ffffffff8146c11c: bb 8f ff ff ff mov $0xffffff8f,%ebx
ffffffff8146c121: c6 45 8a 07 movb $0x7,-0x76(%rbp)
ffffffff8146c125: 48 c7 45 90 00 00 00 movq $0x0,-0x70(%rbp)
...
addr2line -e vmlinux -i 0xffffffff8146c0b1
net/ipv4/route.c:1815
net/ipv4/route.c:1905
which seems to be this line ip_route_input_noref()->ip_route_input_slow():
...
1813 rth->rt_is_input = 1;
1814 if (res.table)
1815 rth->rt_table_id = res.table->tb_id;
1816
...
added by b7503e0cdb5dbec5d201aa69d8888c14679b5ae8
net: Add FIB table id to rtable
Add the FIB table id to rtable to make the information available for
IPv4 as it is for IPv6.
-ss
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More majordomo info at http://vger.kernel.org/majordomo-info.htmlI to get an Oops in ip_route_input_noref(). It happens occasionally during bootup. KVM environment using virtio driver. Let me know if you need any additional info or if you want me to try to bisect it. Starting network... ... [ 0.877040] BUG: unable to handle kernel NULL pointer dereference at 0000000000000056 [ 0.877597] IP: [<ffffffff8155b5e2>] ip_route_input_noref+0x1a2/0xb00 [ 0.877597] PGD 3fa14067 PUD 3fa6e067 PMD 0 [ 0.877597] Oops: 0000 [#1] SMP [ 0.877597] Modules linked in: virtio_net virtio_pci virtio_ring virtio [ 0.877597] CPU: 1 PID: 119 Comm: ifconfig Not tainted 4.2.0+ #1 [ 0.877597] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 0.877597] task: ffff88003fab0bc0 ti: ffff88003faa8000 task.ti: ffff88003faa8000 [ 0.877597] RIP: 0010:[<ffffffff8155b5e2>] [<ffffffff8155b5e2>] ip_route_input_noref+0x1a2/0xb00 [ 0.877597] RSP: 0018:ffff88003ed03ba0 EFLAGS: 00010202 [ 0.877597] RAX: 0000000000000046 RBX: 00000000ffffff8f RCX: 0000000000000020 [ 0.877597] RDX: ffff88003fab50b8 RSI: 0000000000000200 RDI: ffffffff8152b4b8 [ 0.877597] RBP: ffff88003ed03c50 R08: 0000000000000000 R09: 0000000000000000 [ 0.877597] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88003fab6f00 [ 0.877597] R13: ffff88003fab5000 R14: 0000000000000000 R15: ffffffff81cb5600 [ 0.877597] FS: 00007f6de5751700(0000) GS:ffff88003ed00000(0000) knlGS:0000000000000000 [ 0.877597] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.877597] CR2: 0000000000000056 CR3: 000000003fa6d000 CR4: 00000000000006e0 [ 0.877597] Stack: [ 0.877597] 0000000000000000 0000000000000046 ffff88003fffa600 ffff88003ed03be0 [ 0.877597] ffff88003f9e2c00 697da8c0017da8c0 ffff880000000000 000000000007fd00 [ 0.877597] 0000000000000000 0000000000000046 0000000000000000 0000000400000000 [ 0.877597] Call Trace: [ 0.877597] <IRQ> [ 0.877597] [<ffffffff812bfa1f>] ? cpumask_next_and+0x2f/0x40 [ 0.877597] [<ffffffff8158e13c>] arp_process+0x39c/0x690 [ 0.877597] [<ffffffff8158e57e>] arp_rcv+0x13e/0x170 [ 0.877597] [<ffffffff8151feec>] __netif_receive_skb_core+0x60c/0xa00 [ 0.877597] [<ffffffff81515795>] ? __build_skb+0x25/0x100 [ 0.877597] [<ffffffff81515795>] ? __build_skb+0x25/0x100 [ 0.877597] [<ffffffff81521ff6>] __netif_receive_skb+0x16/0x70 [ 0.877597] [<ffffffff81522078>] netif_receive_skb_internal+0x28/0x90 [ 0.877597] [<ffffffff8152288f>] napi_gro_receive+0x7f/0xd0 [ 0.877597] [<ffffffffa0017906>] virtnet_receive+0x256/0x910 [virtio_net] [ 0.877597] [<ffffffffa0017fd8>] virtnet_poll+0x18/0x80 [virtio_net] [ 0.877597] [<ffffffff815234cd>] net_rx_action+0x1dd/0x2f0 [ 0.877597] [<ffffffff81053228>] __do_softirq+0x98/0x260 [ 0.877597] [<ffffffff8164969c>] do_softirq_own_stack+0x1c/0x30 [ 0.877597] <EOI> [ 0.877597] [<ffffffff810530fd>] do_softirq.part.19+0x1d/0x20 [ 0.877597] [<ffffffff81053181>] __local_bh_enable_ip+0x81/0x90 [ 0.877597] [<ffffffffa0016202>] virtnet_napi_enable+0x52/0x60 [virtio_net] [ 0.877597] [<ffffffffa0018200>] virtnet_open+0x40/0xb0 [virtio_net] [ 0.877597] [<ffffffff815259ba>] __dev_open+0xaa/0x120 [ 0.877597] [<ffffffff81525c98>] __dev_change_flags+0x98/0x160 [ 0.877597] [<ffffffff81525d84>] dev_change_flags+0x24/0x60 [ 0.877597] [<ffffffff815935da>] devinet_ioctl+0x5ca/0x6a0 [ 0.877597] [<ffffffff81594beb>] inet_ioctl+0x4b/0x70 [ 0.877597] [<ffffffff81506a50>] sock_do_ioctl+0x20/0x50 [ 0.877597] [<ffffffff81506ee6>] sock_ioctl+0x1a6/0x250 [ 0.877597] [<ffffffff81156185>] do_vfs_ioctl+0x2b5/0x490 [ 0.877597] [<ffffffff811563d4>] SyS_ioctl+0x74/0x80 [ 0.877597] [<ffffffff81647a57>] entry_SYSCALL_64_fastpath+0x12/0x6a [ 0.877597] Code: 31 c0 e8 42 e8 ff ff 48 85 c0 49 89 c5 0f 84 73 08 00 00 48 c7 40 58 20 9c 55 81 c6 80 a2 00 00 00 01 48 8b 45 98 48 85 c0 74 0a <8b> 40 10 41 89 85 b0 00 00 00 65 ff 05 0d 6e ab 7e 80 7d 8a 07 [ 0.877597] RIP [<ffffffff8155b5e2>] ip_route_input_noref+0x1a2/0xb00 [ 0.877597] RSP <ffff88003ed03ba0> [ 0.877597] CR2: 0000000000000056 [ 0.877597] ---[ end trace c702820c32c78c83 ]--- Regards Richard