Hi
On latest kernel i noticed kernel panic happening 1-2 times per day. It
is also happening on older kernel (at least 4.5.3).
Panic message received over netconsole:
[42916.416307] skbuff: skb_under_panic: text:ffffffffa00e8ce5 len:581
put:2 head:ffff8800b0bf2800 data:ffa00500b0bf284c tail:0x291 end:0x6c0
dev:ppp2828
[42916.416677] ------------[ cut here ]------------
[42916.416876] kernel BUG at net/core/skbuff.c:104!
[42916.417075] invalid opcode: 0000 [#1]
SMP
[42916.417388] Modules linked in:
cls_fw
act_police
cls_u32
sch_ingress
sch_sfq
sch_htb
netconsole
configfs
coretemp
nf_nat_pptp
nf_nat_proto_gre
nf_conntrack_pptp
nf_conntrack_proto_gre
pppoe
pppox
ppp_generic
slhc
tun
xt_REDIRECT
nf_nat_redirect
xt_TCPMSS
ipt_REJECT
nf_reject_ipv4
xt_set
ts_bm
xt_string
xt_connmark
xt_DSCP
xt_mark
xt_tcpudp
ip_set_hash_net
ip_set_hash_ip
ip_set
nfnetlink
iptable_mangle
iptable_filter
iptable_nat
nf_conntrack_ipv4
nf_defrag_ipv4
nf_nat_ipv4
nf_nat
nf_conntrack
ip_tables
x_tables
8021q
garp
mrp
stp
llc
[42916.421443] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
4.6.3-build-0105 #4
[42916.421643] Hardware name: HP ProLiant DL320e Gen8 v2, BIOS P80
04/02/2015
[42916.421842] task: ffffffff8200b500 ti: ffffffff82000000 task.ti:
ffffffff82000000
[42916.422178] RIP: 0010:[<ffffffff8184374e>]
[<ffffffff8184374e>] skb_panic+0x49/0x4b
[42916.422574] RSP: 0018:ffff880447403da8 EFLAGS: 00010296
[42916.422773] RAX: 0000000000000089 RBX: ffff880422c13900 RCX:
0000000000000000
[42916.422974] RDX: ffff88044740df50 RSI: ffff88044740c908 RDI:
ffff88044740c908
[42916.423175] RBP: ffff880447403dc8 R08: 0000000000000001 R09:
0000000000000000
[42916.423439] R10: ffffffff820050c0 R11: ffff88041c7ee900 R12:
ffff880423037000
[42916.423640] R13: 0000000000000000 R14: ffff880423037000 R15:
0000000000000000
[42916.423841] FS: 0000000000000000(0000) GS:ffff880447400000(0000)
knlGS:0000000000000000
[42916.424179] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[42916.424379] CR2: 00007effd0814b00 CR3: 0000000430ab2000 CR4:
00000000001406f0
[42916.424577] Stack:
[42916.424772] ffa00500b0bf284c
0000000000000291
00000000000006c0
ffff880423037000
[42916.425333] ffff880447403dd8
ffffffff81843786
ffff880447403e00
ffffffffa00e8ce5
[42916.425898] ffff880422c13900
ffff8800ae7c6c00
ffffffff820b3210
ffff880447403e68
[42916.426463] Call Trace:
[42916.426658] <IRQ>
[42916.426719] [<ffffffff81843786>] skb_push+0x36/0x37
[42916.427111] [<ffffffffa00e8ce5>] ppp_start_xmit+0x10f/0x150
[ppp_generic]
[42916.427314] [<ffffffff81853467>] dev_hard_start_xmit+0x25a/0x2d3
[42916.427516] [<ffffffff818530f2>] ?
validate_xmit_skb.isra.107.part.108+0x11d/0x238
[42916.427858] [<ffffffff8186dee3>] sch_direct_xmit+0x89/0x1b5
[42916.428060] [<ffffffff8186e142>] __qdisc_run+0x133/0x170
[42916.428261] [<ffffffff81850034>] net_tx_action+0xe3/0x148
[42916.428462] [<ffffffff810c401a>] __do_softirq+0xb9/0x1a9
[42916.428663] [<ffffffff810c4251>] irq_exit+0x37/0x7c
[42916.428862] [<ffffffff8102b8f7>] smp_apic_timer_interrupt+0x3d/0x48
[42916.429063] [<ffffffff818cb15c>] apic_timer_interrupt+0x7c/0x90
[42916.429263] <EOI>
[42916.429324] [<ffffffff8101be12>] ? mwait_idle+0x68/0x7e
[42916.429719] [<ffffffff810d731c>] ?
atomic_notifier_call_chain+0x13/0x15
[42916.429921] [<ffffffff8101c212>] arch_cpu_idle+0xa/0xc
[42916.430121] [<ffffffff810ea333>] default_idle_call+0x27/0x29
[42916.430323] [<ffffffff810ea44a>] cpu_startup_entry+0x115/0x1bf
[42916.430526] [<ffffffff818c5d7b>] rest_init+0x72/0x74
[42916.430727] [<ffffffff820cdd8c>] start_kernel+0x3b7/0x3c4
[42916.430929] [<ffffffff820cd422>]
x86_64_start_reservations+0x2a/0x2c
[42916.431130] [<ffffffff820cd4df>] x86_64_start_kernel+0xbb/0xbe
[42916.431332] Code:
78
50
8b
87
c0
00
00
00
50
8b
87
bc
00
00
00
50
ff
b7
d0
00
00
00
31
c0
4c
8b
8f
c8
00
00
00
48
c7
c7
49
10
e1
81
e8
0e
60
8e
ff
0b
48
8b
97
d0
00
00
00
89
f0
01
77
78
48
29
c2
48
3b
97
c8
[42916.435514] RIP
[<ffffffff8184374e>] skb_panic+0x49/0x4b
[42916.439115] RSP <ffff880447403da8>
[42916.439336] ---[ end trace d7bfed0177be96d1 ]---
[42916.445801] Kernel panic - not syncing: Fatal exception in interrupt
[42916.446005] Kernel Offset: disabled
[42916.477266] Rebooting in 5 seconds..
