mainline: x86_64: kernel panic: RIP: 0010:__xfrm_policy_check+0xcb/0x690
From: Naresh Kamboju
Date: Mon Jun 11 2018 - 12:41:57 EST
Kernel panic on x86_64 machine running mainline 4.17.0 kernel while testing
selftests bpf test_tunnel.sh test caused this kernel panic.
I have noticed this kernel panic start happening from
4.17.0-rc7-next-20180529 and still happening on 4.17.0-next-20180608.
[ 213.638287] BUG: unable to handle kernel NULL pointer dereference
at 0000000000000008
++[ ip xfrm poli 213.674036] PGD 0 P4D 0
[ 213.674118] audit: type=1327 audit(1528917683.623:7):
proctitle=6970007866726D00706F6C69637900616464007372630031302E312E312E3130302F3332006473740031302E312E312E3230302F33320064697200696E00746D706C00737263003137322E31362E312E31303000647374003137322E31362E312E3230300070726F746F006573700072657169640031006D6F64650074756E6E
[ 213.677950] Oops: 0000 [#1] SMP PTI
cy[ add src 10.1. 213.677952] CPU: 2 PID: 0 Comm: swapper/2 Tainted:
G W 4.17.0-next-20180608 #1
[ 213.677953] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 213.726998] RIP: 0010:__xfrm_policy_check+0xcb/0x690
[ 213.731962] Code: 80 3d 0a d8 f1 00 00 0f 84 c1 02 00 00 4c 8b 25
2b af f4 00 e8 66 a6 6a ff 85 c0 74 0d 80 3d eb d7 f1 00 00 0f 84 d5
02 00 00 <49> 8b 44 24 08 48 85 c0 74 0c 48 8d b5 78 ff ff ff 4c 89 ff
ff d0
1.[100/32 dst 10. 213.750836] RSP: 0018:ffff91cf6fd03a48 EFLAGS: 00010246
[ 213.757441] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000002
[ 213.764566] RDX: ffffffffb863ebe0 RSI: 0000000000000000 RDI: 0000000000000000
[ 213.771688] RBP: ffff91cf6fd03b18 R08: ffffffffb863ebe0 R09: 0000000000000000
[ 213.778813] R10: ffff91cf6fd039d0 R11: 0000000000000000 R12: 0000000000000000
[ 213.785935] R13: ffff91cf5b23d84e R14: ffff91cf5b779f80 R15: ffff91cf5589cc00
[ 213.793062] FS: 0000000000000000(0000) GS:ffff91cf6fd00000(0000)
knlGS:0000000000000000
[ 213.801162] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 213.806900] CR2: 0000000000000008 CR3: 000000004201e001 CR4: 00000000003606e0
[ 213.814025] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 213.821200] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 213.828324] Call Trace:
[ 213.830769] <IRQ>
[ 213.832783] ? trace_hardirqs_on+0xd/0x10
[ 213.836819] __xfrm_policy_check2.constprop.36+0x6c/0xc0
[ 213.842131] tcp_v4_rcv+0x9ef/0xbd0
[ 213.845615] ? ip_local_deliver_finish+0x26/0x340
[ 213.850314] ip_local_deliver_finish+0xc1/0x340
[ 213.854843] ip_local_deliver+0x74/0x220
[ 213.858761] ? inet_del_offload+0x40/0x40
[ 213.862767] ip_rcv_finish+0x1f0/0x550
[ 213.866519] ip_rcv+0x282/0x480
[ 213.869657] ? ip_local_deliver_finish+0x340/0x340
[ 213.874448] __netif_receive_skb_core+0x3b2/0xd30
[ 213.879145] ? lock_acquire+0xd5/0x1c0
[ 213.882891] __netif_receive_skb+0x18/0x60
[ 213.886990] ? __netif_receive_skb+0x18/0x60
[ 213.891252] netif_receive_skb_internal+0x79/0x370
[ 213.896062] napi_gro_receive+0x138/0x1b0
[ 213.900121] igb_poll+0x610/0xe70
[ 213.903440] net_rx_action+0x246/0x4b0
[ 213.907190] ? lock_acquire+0xd5/0x1c0
[ 213.910933] ? igb_msix_ring+0x5e/0x70
[ 213.914681] __do_softirq+0xbf/0x493
[ 213.918260] irq_exit+0xc3/0xd0
[ 213.921405] do_IRQ+0x65/0x110
[ 213.924464] common_interrupt+0xf/0xf
[ 213.928128] </IRQ>
[ 213.930225] RIP: 0010:cpuidle_enter_state+0xa7/0x370
1.[1.200/32 dir i 213.935182] Code: 47 e8 bd 9a 7f ff 48 89 45 d0 0f
1f 44 00 00 31 ff e8 2d a9 7f ff 80 7d c7 00 0f 85 ee 01 00 00 e8 ae
9f 81 ff fb 48 8b 4d d0 <48> 2b 4d c8 48 ba cf f7 53 e3 a5 9b c4 20 48
89 c8 48 c1 f9 3f 48
[ 213.955445] RSP: 0018:ffffab2c01943e38 EFLAGS: 00000246 ORIG_RAX:
ffffffffffffffdc
[ 213.963002] RAX: ffff91cf6fd21ec0 RBX: 0000000000000002 RCX: 00000031bdd50c87
[ 213.970127] RDX: 00000031bdd50c87 RSI: 000000002aaaaaaa RDI: ffffffffb84ab752
[ 213.977250] RBP: ffffab2c01943e78 R08: 0000000000000061 R09: 0000000000000018
[ 213.984375] R10: ffffab2c01943e18 R11: 0000000000000092 R12: ffff91cf5ce88000
[ 213.991497] R13: ffffffffb94cf278 R14: 0000000000000002 R15: ffffffffb94cf260
[ 213.998624] ? cpuidle_enter_state+0xa2/0x370
[ 214.002982] ? cpuidle_enter_state+0xa2/0x370
[ 214.007332] cpuidle_enter+0x17/0x20
[ 214.010902] call_cpuidle+0x23/0x40
[ 214.014387] do_idle+0x1f0/0x250
[ 214.017613] cpu_startup_entry+0x73/0x80
[ 214.021538] start_secondary+0x175/0x1a0
[ 214.025465] secondary_startup_64+0xa5/0xb0
[ 214.029651] Modules linked in: cls_bpf xt_mark algif_hash af_alg
x86_pkg_temp_thermal fuse
[ 214.037941] CR2: 0000000000000008
[ 214.041255] ---[ end trace a0b077febc9b99ca ]---
[ 214.045874] RIP: 0010:__xfrm_policy_check+0xcb/0x690
n tmpl src 172.1[ 214.050838] Code: 80 3d 0a d8 f1 00 00 0f 84 c1 02
00 00 4c 8b 25 2b af f4 00 e8 66 a6 6a ff 85 c0 74 0d 80 3d eb d7 f1
00 00 0f 84 d5 02 00 00 <49> 8b 44 24 08 48 85 c0 74 0c 48 8d b5 78 ff
ff ff 4c 89 ff ff d0
[ 214.071103] RSP: 0018:ffff91cf6fd03a48 EFLAGS: 00010246
[ 214.076327] RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000002
[ 214.083451] RDX: ffffffffb863ebe0 RSI: 0000000000000000 RDI: 0000000000000000
[ 214.090574] RBP: ffff91cf6fd03b18 R08: ffffffffb863ebe0 R09: 0000000000000000
[ 214.097699] R10: ffff91cf6fd039d0 R11: 0000000000000000 R12: 0000000000000000
[ 214.104821] R13: ffff91cf5b23d84e R14: ffff91cf5b779f80 R15: ffff91cf5589cc00
[ 214.111945] FS: 0000000000000000(0000) GS:ffff91cf6fd00000(0000)
knlGS:0000000000000000
[ 214.120022] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 214.125760] CR2: 0000000000000008 CR3: 000000004201e001 CR4: 00000000003606e0
[ 214.132885] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 214.140009] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 214.147131] Kernel panic - not syncing: Fatal exception in interrupt
[ 214.153519] Kernel Offset: 0x36c00000 from 0xffffffff81000000
(relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 214.164292] ---[ end Kernel panic - not syncing: Fatal exception in
interrupt ]---
[ 214.171852] ------------[ cut here ]------------
Kconfigs on this kernel,
-------------------------------
CONFIG_XFRM=y
CONFIG_XFRM_ALGO=y
CONFIG_XFRM_USER=y
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
http://snapshots.linaro.org/openembedded/lkft/morty/intel-core2-32/rpb/linux-next/274/config
Test case source:
--------------------------
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/tools/testing/selftests/bpf/test_tunnel.sh#n565
steps to reproduce:
--------------------------
cd /tools/testing/selftests/bpf/
./test_tunnel.sh
Debugging shows it is coming from function
setup_xfrm_tunnel() {
<trim>
ip xfrm state add src 172.16.1.100 dst 172.16.1.200 proto esp spi 0x1 \
reqid 1 mode tunnel auth-trunc 'hmac(sha1)' \
0x1111111111111111111111111111111111111111 96 enc 'cbc(aes)' \
0x22222222222222222222222222222222
<trim>
}
Complete test log can be found in this location,
https://lkft.validation.linaro.org/scheduler/job/269604#L2092
Best regards
Naresh Kamboju