Date:   Wed, 6 Feb 2019 18:36:39 +0100
From:   "Frank Wunderlich" <frank-w@...lic-files.de>
To:     netdev@...r.kernel.org
Subject: [BUG] kernel panic 4.14.95 in kmem_cache_alloc / build_skb

Hi,

linux-net-mailinglist for reporting bugs seems not existing anymore and i have not found out the right one..."scripts/get_maintainer.pl -f ./include/linux/skbuff.h" shows only linux-kernel as mailing list which is not specific for network, so sorry, if i'm in the wrong mailinglist.

i've recently noticed panics on my bananapi-r2 with kernel 4.14.95, but can't locate them in detail...all is pointing to kmem_cache_alloc and build_skb, but over complete different ways. so i guess it's network-related

i currently don't know what is triggering this crashes, so i cannot reproduce them on my test-machine :(

it's not only an oops...the machine stays still and have to be resettet, sometimes after an half hour running

i had kernel 4.14.78 running before, so i think it's a change between these 2 Kernel-versions and no OS-related (debian-stretch) or Hardware-issue

currently i test with 4.14.90, if it has same behaviour...at the moment it seems stable...

i cannot test it with another kernel-branch (4.19+), because i need to test it on my productive machine till i find a way to reproduce it....maybe you can see a hint in stacktrace to guide me...at the moment crash occours unexpectely

i looked through git-tree but did not found anything related

regards Frank

here my 3 recorded crash-logs...maybe you can point me in the right direction (reproduce/debug/fix):

first is thrown out of mt76-module (had mt7612 inserted which i had disabled on last 2 crashes):

[ 1281.724002] Unable to handle kernel NULL pointer dereference at virtual address 00000001
[ 1281.732105] pgd = c0004000
[ 1281.734836] [00000001] *pgd=00000000
[ 1281.738425] Internal error: Oops: 5 [#1] SMP ARM
[ 1281.743016] Modules linked in: xt_addrtype veth pppoe pppox ppp_generic slhc sit tunnel4 ip_tunnel bridge ip6t_REJECT nf_reject_ipv6 xt_mac
ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipt_REJECT nf_reject_ipv4 xt_limit xt_iprange xt_recent xt_conntrack iptabl
e_filter ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_nat tun xt_tcpudp iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrac
k xt_mark iptable_mangle mt76x2e mt76 mtk_thermal spi_mt65xx thermal_sys mt6577_auxadc pwm_mediatek nvmem_mtk_efuse mtk_pmic_keys evbug rtc_mt6
397 nfsd ip_tables x_tables ipv6
[ 1281.795425] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.95-bpi-r2-main #49
[ 1281.802510] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1281.808043] task: c11073c0 task.stack: c1100000
[ 1281.812551] PC is at kmem_cache_alloc+0xd0/0x21c
[ 1281.817134] LR is at 0x391d6
[ 1281.819990] pc : [<c028c0f4>] lr : [<000391d6>] psr: 280f0113
[ 1281.826209] sp : c1101c18 ip : a80f0113 fp : c1101c4c
[ 1281.831393] r10: 00000001 r9 : dbdf6900 r8 : c0895b9c
[ 1281.836578] r7 : de801cc0 r6 : 01080020 r5 : c1226790 r4 : de801cc0
[ 1281.843056] r3 : 00000000 r2 : df5a39d4 r1 : 1e4e9000 r0 : 000391d5
[ 1281.849535] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 1281.856617] Control: 10c5387d Table: 9bdc006a DAC: 00000051
[ 1281.862319] Process swapper/0 (pid: 0, stack limit = 0xc1100218)
[ 1281.868280] Stack: (0xc1101c18 to 0xc1102000)
[ 1281.872608] 1c00: db119900 df5a0fb8
[ 1281.880733] 1c20: c1101c54 df5a0784 00000000 00000300 da308b00 680f0113 00000000 da1dd6b0
[ 1281.888858] 1c40: c1101c74 c1101c50 c0895b9c c028c030 df5a0784 00000000 00000300 da308b00
[ 1281.896983] 1c60: 680f0113 00000000 c1101c9c c1101c78 c0895d10 c0895b70 00000000 dcc48b78
[ 1281.905109] 1c80: db6e5f00 dcc48580 de8ec460 c1101d10 c1101d04 c1101ca0 c0a729cc c0895c88
[ 1281.913234] 1ca0: c015ff18 c01593b4 d63e99d9 00000000 c1101d0c c01525cc c0b02a08 df5a0f80
[ 1281.921359] 1cc0: c1101ce4 c1101cd0 c01525cc c0151994 df5a0f80 da029e00 c1101d1c 00000000
[ 1281.929484] 1ce0: 00000000 de8ec460 bf16bb90 dcc48b78 00000001 00000003 c1101d3c c1101d08
[ 1281.937608] 1d00: c0a72ba8 c0a727b4 00000002 c04e15c8 00000000 00000000 c04e15c8 de8ecd20
[ 1281.945732] 1d20: dcc48b78 00000002 bf16bb90 de8ecd20 c1101d54 c1101d40 bf16bbd4 c0a72b74
[ 1281.953858] 1d40: dcc48580 de8ecab0 c1101d8c c1101d58 c0a78f20 bf16bb9c c1101d64 de8ec460
[ 1281.961983] 1d60: ff76abc0 de8ecd20 de8ed868 c1101db0 bf16baf8 c10af2a8 ffffe000 00000040
[ 1281.970108] 1d80: c1101d9c c1101d90 c0a78fbc c0a78e90 c1101e04 c1101da0 bf16c0a8 c0a78fac
[ 1281.978232] 1da0: de8ecd20 00200000 c1101ddc de8ecd20 c1101db0 c1101db0 00000000 00000000
[ 1281.986357] 1dc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1281.994482] 1de0: c0aa6524 de8ed864 de8ed868 00000000 00000000 c10af2a8 c1101e2c c1101e08
[ 1282.002607] 1e00: c012cf74 bf16c058 c1102098 00000006 c11bcd08 00000100 00000007 ffffe000
[ 1282.010732] 1e20: c1101e8c c1101e30 c0101614 c012cf10 c0182400 c0185260 00000001 00200102
[ 1282.018858] 1e40: c1102d00 00017f7c c0b023a8 0000000a c11f4c40 c1103c6c c10af310 c1102080
[ 1282.026982] 1e60: c0185740 c10b7b3c 00000000 00000000 00000001 de819000 e1003000 e07fcc00
[ 1282.035107] 1e80: c1101e9c c1101e90 c012c998 c01014f4 c1101ec4 c1101ea0 c01818f4 c012c8c0
[ 1282.043231] 1ea0: c11043f8 c1168010 e100200c e1002000 c1101ef0 e1003000 c1101eec c1101ec8
[ 1282.051357] 1ec0: c01014a0 c0181890 c01098b0 680f0013 ffffffff c1101f24 c0d2c0e0 c1100000
[ 1282.059481] 1ee0: c1101f4c c1101ef0 c010e24c c0101450 00000000 0018f100 1e4e9000 c011f8e0
[ 1282.067607] 1f00: ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001 e07fcc00 c1101f4c
[ 1282.075731] 1f20: c1101f50 c1101f40 c01098ac c01098b0 680f0013 ffffffff 00000051 00000000
[ 1282.083856] 1f40: c1101f5c c1101f50 c0ac2d88 c0109874 c1101f84 c1101f60 c016e3b0 c0ac2d64
[ 1282.091982] 1f60: 000000be c11f3f00 c1103c40 ffffffff c11f3f00 c1079e30 c1101f94 c1101f88
[ 1282.100107] 1f80: c016e6b0 c016e2d0 c1101fac c1101f98 c0abcc9c c016e694 c11f3f40 c11f3f00
[ 1282.108231] 1fa0: c1101ff4 c1101fb0 c1000e28 c0abcbe8 ffffffff ffffffff 00000000 c1000784
[ 1282.116357] 1fc0: 00000000 c1079e30 00000000 c11f4494 c1103c58 c1079e2c c1108800 8000406a
[ 1282.124481] 1fe0: 410fc073 00000000 00000000 c1101ff8 8000807c c1000a7c 00000000 00000000
[ 1282.132624] [<c028c0f4>] (kmem_cache_alloc) from [<c0895b9c>] (__build_skb+0x38/0xa0)
[ 1282.140411] [<c0895b9c>] (__build_skb) from [<c0895d10>] (__netdev_alloc_skb+0x94/0x110)
[ 1282.148456] [<c0895d10>] (__netdev_alloc_skb) from [<c0a729cc>] (__ieee80211_beacon_get+0x224/0x3a0)
[ 1282.157535] [<c0a729cc>] (__ieee80211_beacon_get) from [<c0a72ba8>] (ieee80211_beacon_get_tim+0x40/0x11c)
[ 1282.167077] [<c0a72ba8>] (ieee80211_beacon_get_tim) from [<bf16bbd4>] (mt76x2_update_beacon_iter+0x44/0x5c [mt76x2e])
[ 1282.177647] [<bf16bbd4>] (mt76x2_update_beacon_iter [mt76x2e]) from [<c0a78f20>] (__iterate_interfaces+0x9c/0x11c)
[ 1282.187936] [<c0a78f20>] (__iterate_interfaces) from [<c0a78fbc>] (ieee80211_iterate_active_interfaces_atomic+0x1c/0x20)
[ 1282.198756] [<c0a78fbc>] (ieee80211_iterate_active_interfaces_atomic) from [<bf16c0a8>] (mt76x2_pre_tbtt_tasklet+0x5c/0x148 [mt76x2e])
[ 1282.210783] [<bf16c0a8>] (mt76x2_pre_tbtt_tasklet [mt76x2e]) from [<c012cf74>] (tasklet_action+0x70/0x104)
[ 1282.220379] [<c012cf74>] (tasklet_action) from [<c0101614>] (__do_softirq+0x12c/0x378)
[ 1282.228248] [<c0101614>] (__do_softirq) from [<c012c998>] (irq_exit+0xe4/0x15c)
[ 1282.235516] [<c012c998>] (irq_exit) from [<c01818f4>] (__handle_domain_irq+0x70/0xc4)
[ 1282.243299] [<c01818f4>] (__handle_domain_irq) from [<c01014a0>] (gic_handle_irq+0x5c/0xa0)
[ 1282.251601] [<c01014a0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 1282.259031] Exception stack(0xc1101ef0 to 0xc1101f38)
[ 1282.264048] 1ee0: 00000000 0018f100 1e4e9000 c011f8e0
[ 1282.272173] 1f00: ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001 e07fcc00 c1101f4c
[ 1282.280296] 1f20: c1101f50 c1101f40 c01098ac c01098b0 680f0013 ffffffff
[ 1282.286872] [<c010e24c>] (__irq_svc) from [<c01098b0>] (arch_cpu_idle+0x48/0x4c)
[ 1282.294225] [<c01098b0>] (arch_cpu_idle) from [<c0ac2d88>] (default_idle_call+0x30/0x3c)
[ 1282.302267] [<c0ac2d88>] (default_idle_call) from [<c016e3b0>] (do_idle+0xec/0x150)
[ 1282.309877] [<c016e3b0>] (do_idle) from [<c016e6b0>] (cpu_startup_entry+0x28/0x2c)
[ 1282.317402] [<c016e6b0>] (cpu_startup_entry) from [<c0abcc9c>] (rest_init+0xc0/0xc4)
[ 1282.325101] [<c0abcc9c>] (rest_init) from [<c1000e28>] (start_kernel+0x3b8/0x3c4)
[ 1282.332539] Code: e121f00c e35a0000 0a000002 e5943014 (e79a3003)

Message from[ 1282.338703] ---[ end trace 8329366c083f9bce ]---
syslogd@...-r2-[ 1282.344651] Kernel panic - not syncing: Fatal exception in interrupt
[ 1282.352323] CPU2: stopping
[ 1282.355026] CPU: 2 PID: 3188 Comm: dmesg Tainted: G D 4.14.95-bpi-r2-main #49
[ 1282.363232] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1282.368786] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 1282.376485] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 1282.383666] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 1282.391017] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 1282.398539] [<c01014e0>] (gic_handle_irq) from [<c010e614>] (__irq_usr+0x54/0x80)
[ 1282.405970] Exception stack(0xd8149fb0 to 0xd8149ff8)
[ 1282.410987] 9fa0: beaaa9e8 004c62e1 00000000 00000032
[ 1282.419113] 9fc0: beaaa9e4 004c62e4 beaaa980 004c62e0 b6f144c0 004cb758 beaaa9e0 beaaa9e4
[ 1282.427236] 9fe0: 004c60b4 beaaa8e8 beaaa9e4 b6de2a3c 800f0030 ffffffff
[ 1282.433804] CPU1: stopping
[ 1282.436496] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D 4.14.95-bpi-r2-main #49
[ 1282.444789] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1282.450328] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 1282.458024] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 1282.465202] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 1282.472552] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 1282.480073] [<c01014e0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 1282.487503] Exception stack(0xde943f38 to 0xde943f80)
[ 1282.492517] 3f20: 00000000 000b9204
[ 1282.500642] 3f40: 1e4fa000 c011f8e0 ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001
[ 1282.508767] 3f60: 00000000 de943f94 de943f98 de943f88 c01098ac c01098b0 60000013 ffffffff
[ 1282.516895] [<c010e24c>] (__irq_svc) from [<c01098b0>] (arch_cpu_idle+0x48/0x4c)
[ 1282.524247] [<c01098b0>] (arch_cpu_idle) from [<c0ac2d88>] (default_idle_call+0x30/0x3c)
[ 1282.532289] [<c0ac2d88>] (default_idle_call) from [<c016e3b0>] (do_idle+0xec/0x150)
[ 1282.539898] [<c016e3b0>] (do_idle) from [<c016e6b0>] (cpu_startup_entry+0x28/0x2c)
[ 1282.547421] [<c016e6b0>] (cpu_startup_entry) from [<c0110c60>] (secondary_start_kernel+0x170/0x194)
[ 1282.556409] [<c0110c60>] (secondary_start_kernel) from [<801018ec>] (0x801018ec)
[ 1282.563755] CPU3: stopping
[ 1282.566447] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G D 4.14.95-bpi-r2-main #49
[ 1282.574739] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1282.580279] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 1282.587975] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 1282.595152] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 1282.602503] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 1282.610024] [<c01014e0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 1282.617454] Exception stack(0xde947ea0 to 0xde947ee8)
[ 1282.622474] 7ea0: dbc09200 00000001 dbc09200 0000b59f c10b7f80 00000000 df5d3f80 1e51c000
[ 1282.630598] 7ec0: c0abdbfc ffffe000 de91c800 de947f34 de947f38 de947ef0 c0abdbfc c015028c
[ 1282.638718] 7ee0: 600d0013 ffffffff
[ 1282.642188] [<c010e24c>] (__irq_svc) from [<c015028c>] (finish_task_switch+0xf0/0x244)
[ 1282.650059] [<c015028c>] (finish_task_switch) from [<c0abdbfc>] (__schedule+0x21c/0x6f8)
[ 1282.658101] [<c0abdbfc>] (__schedule) from [<c0abe500>] (schedule_idle+0x44/0x84)
[ 1282.665538] [<c0abe500>] (schedule_idle) from [<c016e3d4>] (do_idle+0x110/0x150)
[ 1282.672889] [<c016e3d4>] (do_idle) from [<c016e6b0>] (cpu_startup_entry+0x28/0x2c)
[ 1282.680413] [<c016e6b0>] (cpu_startup_entry) from [<c0110c60>] (secondary_start_kernel+0x170/0x194)
[ 1282.689400] [<c0110c60>] (secondary_start_kernel) from [<801018ec>] (0x801018ec)
[ 1282.696754] ---[ end Kernel panic - not syncing: Fatal exception in interrupt
e at Feb 4 19:03:43 ...
kernel:[ 1281.738425] Internal error: Oops: 5 [#1] SMP ARM

=============================================================================================================================

19:15] root@...-r2-e:~ (156)# [ 666.687166] Unable to handle kernel NULL pointer dereference at virtual address 00000001
[ 666.695237] pgd = c0004000
[ 666.697927] [00000001] *pgd=00000000
[ 666.701484] Internal error: Oops: 5 [#1] SMP ARM
[ 666.706066] Modules linked in: xt_addrtype veth pppoe pppox ppp_generic slhc sit tunnel4 ip_tunnel bridge ip6t_REJECT nf_reject_ipv6 xt_mac
ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipt_REJECT nf_reject_ipv4 xt_limit xt_iprange xt_recent xt_conntrack iptabl
e_filter ipt_MASQUERADE nf_nat_masquerade_ipv4 tun xt_nat xt_tcpudp iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrac
k xt_mark iptable_mangle spi_mt65xx mtk_thermal thermal_sys evbug mt6577_auxadc pwm_mediatek mtk_pmic_keys rtc_mt6397 nvmem_mtk_efuse nfsd ip_t
ables x_tables ipv6 [last unloaded: mt76]
[ 666.759246] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.95-bpi-r2-main #49
[ 666.766329] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 666.771860] task: c11073c0 task.stack: c1100000
[ 666.776363] PC is at kmem_cache_alloc+0xd0/0x21c
[ 666.780945] LR is at 0x179ab
[ 666.783801] pc : [<c028c0f4>] lr : [<000179ab>] psr: 200f0113
[ 666.790020] sp : c1101cd0 ip : a00f0113 fp : c1101d04
[ 666.795204] r10: 00000001 r9 : de97cb40 r8 : c0895b9c
[ 666.800389] r7 : de801cc0 r6 : 01080020 r5 : c1226790 r4 : de801cc0
[ 666.806867] r3 : 00000000 r2 : df5a39d4 r1 : 1e4e9000 r0 : 000179aa
[ 666.813347] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 666.820429] Control: 10c5387d Table: 9bbc806a DAC: 00000051
[ 666.826133] Process swapper/0 (pid: 0, stack limit = 0xc1100218)
[ 666.832093] Stack: (0xc1101cd0 to 0xc1102000)
[ 666.836423] 1cc0: 9a7c0c40 df9b1700 00000500 da723ec0
[ 666.844549] 1ce0: 00000740 00000740 da723ec0 dd8a0000 9a7c0500 deb6c728 c1101d2c c1101d08
[ 666.852674] 1d00: c0895b9c c028c030 da723ec0 00000740 da723ec0 e1038b00 dd8a0000 9a7c0500
[ 666.860799] 1d20: c1101d44 c1101d30 c0895c24 c0895b70 deb6c628 000005b0 c1101dbc c1101d48
[ 666.868924] 1d40: c071b4a0 c0895c10 00000002 00000000 c0dba83c 00000040 deb6c010 c1225940
[ 666.877050] 1d60: 3fff0000 00000000 c0b0184c 9a723f00 e1033000 c5ee0004 c08a9a98 c08a6ef0
[ 666.885175] 1d80: 00000040 da7c04c0 2a678002 00000000 c1101dbc deb6c728 00000001 00000040
[ 666.893299] 1da0: c11c0048 0000012c 00008f3d c1101df0 c1101e2c c1101dc0 c08ae4d8 c071b328
[ 666.901424] 1dc0: dd889940 dead4d00 c1101de4 c0debe30 c1104fcc c1103c6c ffffe000 c11bcb49
[ 666.909550] 1de0: c10b8840 df5a1840 1e4e9000 c1102d00 c1101df0 c1101df0 c1101df8 c1101df8
[ 666.917675] 1e00: ffffe000 c110208c 00000003 c11bcd08 00000100 00000004 ffffe000 00000008
[ 666.925800] 1e20: c1101e8c c1101e30 c0101614 c08ae39c c0182400 c0185260 00000001 00200102
[ 666.933925] 1e40: c1102d00 00008f3d c0b023a8 0000000a c11f4c40 c1103c6c c10af310 c1102080
[ 666.942050] 1e60: c0185740 c10b7b3c 00000000 00000000 00000001 de819000 e1003000 e07fcc00
[ 666.950176] 1e80: c1101e9c c1101e90 c012c998 c01014f4 c1101ec4 c1101ea0 c01818f4 c012c8c0
[ 666.958302] 1ea0: c11043f8 c1168010 e100200c e1002000 c1101ef0 e1003000 c1101eec c1101ec8
[ 666.966428] 1ec0: c01014a0 c0181890 c01098b0 600f0013 ffffffff c1101f24 c0d2c0e0 c1100000
[ 666.974553] 1ee0: c1101f4c c1101ef0 c010e24c c0101450 00000000 000aeb14 1e4e9000 c011f8e0
[ 666.982678] 1f00: ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001 e07fcc00 c1101f4c
[ 666.990803] 1f20: c1101f50 c1101f40 c01098ac c01098b0 600f0013 ffffffff 00000051 00000000
[ 666.998927] 1f40: c1101f5c c1101f50 c0ac2d88 c0109874 c1101f84 c1101f60 c016e3b0 c0ac2d64
[ 667.007053] 1f60: 000000be c11f3f00 c1103c40 ffffffff c11f3f00 c1079e30 c1101f94 c1101f88
[ 667.015180] 1f80: c016e6b0 c016e2d0 c1101fac c1101f98 c0abcc9c c016e694 c11f3f40 c11f3f00
[ 667.023305] 1fa0: c1101ff4 c1101fb0 c1000e28 c0abcbe8 ffffffff ffffffff 00000000 c1000784
[ 667.031431] 1fc0: 00000000 c1079e30 00000000 c11f4494 c1103c58 c1079e2c c1108800 8000406a
[ 667.039556] 1fe0: 410fc073 00000000 00000000 c1101ff8 8000807c c1000a7c 00000000 00000000
[ 667.047698] [<c028c0f4>] (kmem_cache_alloc) from [<c0895b9c>] (__build_skb+0x38/0xa0)
[ 667.055485] [<c0895b9c>] (__build_skb) from [<c0895c24>] (build_skb+0x20/0x78)
[ 667.062671] [<c0895c24>] (build_skb) from [<c071b4a0>] (mtk_napi_rx+0x184/0x568)
[ 667.070024] [<c071b4a0>] (mtk_napi_rx) from [<c08ae4d8>] (net_rx_action+0x148/0x400)
[ 667.077722] [<c08ae4d8>] (net_rx_action) from [<c0101614>] (__do_softirq+0x12c/0x378)
[ 667.085507] [<c0101614>] (__do_softirq) from [<c012c998>] (irq_exit+0xe4/0x15c)
[ 667.092775] [<c012c998>] (irq_exit) from [<c01818f4>] (__handle_domain_irq+0x70/0xc4)
[ 667.100561] [<c01818f4>] (__handle_domain_irq) from [<c01014a0>] (gic_handle_irq+0x5c/0xa0)
[ 667.108861] [<c01014a0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 667.116293] Exception stack(0xc1101ef0 to 0xc1101f38)
[ 667.121309] 1ee0: 00000000 000aeb14 1e4e9000 c011f8e0
[ 667.129436] 1f00: ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001 e07fcc00 c1101f4c
[ 667.137560] 1f20: c1101f50 c1101f40 c01098ac c01098b0 600f0013 ffffffff
[ 667.144138] [<c010e24c>] (__irq_svc) from [<c01098b0>] (arch_cpu_idle+0x48/0x4c)
[ 667.151494] [<c01098b0>] (arch_cpu_idle) from [<c0ac2d88>] (default_idle_call+0x30/0x3c)
[ 667.159537] [<c0ac2d88>] (default_idle_call) from [<c016e3b0>] (do_idle+0xec/0x150)
[ 667.167150] [<c016e3b0>] (do_idle) from [<c016e6b0>] (cpu_startup_entry+0x28/0x2c)
[ 667.174675] [<c016e6b0>] (cpu_startup_entry) from [<c0abcc9c>] (rest_init+0xc0/0xc4)
[ 667.182376] [<c0abcc9c>] (rest_init) from [<c1000e28>] (start_kernel+0x3b8/0x3c4)
[ 667.189815] Code: e121f00c e35a0000 0a000002 e5943014 (e79a3003)
[ 667.195994] ---[ end trace 2a6dec570c221166 ]---
[ 667.200595] Kernel panic - not syncing: Fatal exception in interrupt
[ 667.206914] CPU3: stopping
[ 667.209614] CPU: 3 PID: 165 Comm: systemd-journal Tainted: G D 4.14.95-bpi-r2-main #49
[ 667.218596] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 667.224148] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 667.231845] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 667.239025] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 667.246376] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 667.253898] [<c01014e0>] (gic_handle_irq) from [<c010e614>] (__irq_usr+0x54/0x80)
[ 667.261329] Exception stack(0xdde3ffb0 to 0xdde3fff8)
[ 667.266346] ffa0: bec8224f 0000000a 00000001 000005e8
[ 667.274471] ffc0: 00000001 b6ccd97d bec81e28 bec81db0 00000000 bec82280 00000009 00000000
[ 667.282594] ffe0: b6d69010 bec81d90 b6cb24cb b6cb1a5e 200d0030 ffffffff
[ 667.289161] CPU2: stopping
[ 667.291854] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G D 4.14.95-bpi-r2-main #49
[ 667.300146] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 667.305685] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 667.313380] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 667.320559] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 667.327909] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 667.335431] [<c01014e0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 667.342861] Exception stack(0xde945f38 to 0xde945f80)
[ 667.347875] 5f20: 00000000 000611a4
[ 667.356000] 5f40: 1e50b000 c011f8e0 ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001
[ 667.364125] 5f60: 00000000 de945f94 de945f98 de945f88 c01098ac c01098b0 600f0013 ffffffff
[ 667.372253] [<c010e24c>] (__irq_svc) from [<c01098b0>] (arch_cpu_idle+0x48/0x4c)
[ 667.379605] [<c01098b0>] (arch_cpu_idle) from [<c0ac2d88>] (default_idle_call+0x30/0x3c)
[ 667.387646] [<c0ac2d88>] (default_idle_call) from [<c016e3b0>] (do_idle+0xec/0x150)
[ 667.395254] [<c016e3b0>] (do_idle) from [<c016e6b0>] (cpu_startup_entry+0x28/0x2c)
[ 667.402778] [<c016e6b0>] (cpu_startup_entry) from [<c0110c60>] (secondary_start_kernel+0x170/0x194)
[ 667.411766] [<c0110c60>] (secondary_start_kernel) from [<801018ec>] (0x801018ec)
[ 667.419113] CPU1: stopping
[ 667.421805] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G D 4.14.95-bpi-r2-main #49
[ 667.430098] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 667.435639] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 667.443334] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 667.450513] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 667.457863] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 667.465385] [<c01014e0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 667.472816] Exception stack(0xde943f38 to 0xde943f80)
[ 667.477831] 3f20: 00000000 00071d18
[ 667.485956] 3f40: 1e4fa000 c011f8e0 ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001
[ 667.494081] 3f60: 00000000 de943f94 de943f98 de943f88 c01098ac c01098b0 680e0013 ffffffff
[ 667.502208] [<c010e24c>] (__irq_svc) from [<c01098b0>] (arch_cpu_idle+0x48/0x4c)
[ 667.509558] [<c01098b0>] (arch_cpu_idle) from [<c0ac2d88>] (default_idle_call+0x30/0x3c)
[ 667.517598] [<c0ac2d88>] (default_idle_call) from [<c016e3b0>] (do_idle+0xec/0x150)
[ 667.525207] [<c016e3b0>] (do_idle) from [<c016e6b0>] (cpu_startup_entry+0x28/0x2c)
[ 667.532730] [<c016e6b0>] (cpu_startup_entry) from [<c0110c60>] (secondary_start_kernel+0x170/0x194)
[ 667.541717] [<c0110c60>] (secondary_start_kernel) from [<801018ec>] (0x801018ec)
[ 667.549071] ---[ end Kernel panic - not syncing: Fatal exception in interrupt

=============================================================================================================

[ 1851.777568] Internal err
or: Oops: 5 [#1] SMP ARM
[ 1851.782161] Modules linked in: xt_addrtype veth pppoe pppox ppp_generic slhc sit tunnel4 ip_tunnel brid
ge ip6t_REJECT nf_reject_ipv6 xt_mac ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables i
pt_REJECT nf_reject_ipv4 xt_limit xt_iprange xt_recent xt_conntrack iptable_filter ipt_MASQUERADE nf_nat_m
asquerade_ipv4 xt_nat tun xt_tcpudp iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_con
ntrack xt_mark iptable_mangle mtk_thermal thermal_sys mt6577_auxadc pwm_mediatek spi_mt65xx evbug mtk_pmic
_keys rtc_mt6397 nvmem_mtk_efuse nfsd ip_tables x_tables ipv6 [last unloaded: mt76]
[ 1851.835334] CPU: 0 PID: 3428 Comm: SoftwareVsyncTh Not tainted 4.14.95-bpi-r2-main #49
[ 1851.843192] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1851.848722] task: da788600 task.stack: da77e000
[ 1851.853226] PC is at kmem_cache_alloc+0xd0/0x21c
[ 1851.857807] LR is at 0x6fc3d
[ 1851.860663] pc : [<c028c0f4>] lr : [<0006fc3d>] psr: 20070113
[ 1851.866881] sp : da77fd70 ip : a0070113 fp : da77fda4
[ 1851.872064] r10: 00000001 r9 : de950900 r8 : c08958f0
[ 1851.877249] r7 : de801cc0 r6 : 01080020 r5 : c1226790 r4 : de801cc0
[ 1851.883727] r3 : 00000000 r2 : df5a39d4 r1 : 1e4e9000 r0 : 0006fc3c
[ 1851.890207] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
[ 1851.897290] Control: 10c5387d Table: 9bba006a DAC: 00000051
[ 1851.902992] Process SoftwareVsyncTh (pid: 3428, stack limit = 0xda77e218)
[ 1851.909729] Stack: (0xda77fd70 to 0xda780000)
[ 1851.914054] fd60: 1e4e9000 c019d1cc 20070193 01080020
[ 1851.922175] fd80: 00000080 00000000 de801cc0 01080020 00000000 00000000 da77fdd4 da77fda8
[ 1851.930302] fda0: c08958f0 c028c030 00000000 df59eb9c 01080020 db7b8300 c119f040 db7b8314
[ 1851.938428] fdc0: 0000001c 00000000 da77fe0c da77fdd8 c08b965c c08958a8 da77fdfc da77fde8
[ 1851.946553] fde0: c0149494 db7b8300 db7b8318 00000001 db7b8314 00000003 00000000 ffffe000
[ 1851.954678] fe00: da77fe34 da77fe10 c08be820 c08b961c c11bd17c 00000100 c08be68c db7b8330
[ 1851.962803] fe20: 00000200 00000000 da77fe6c da77fe38 c019bdc4 c08be698 c019db48 df5a4140
[ 1851.970928] fe40: 00000000 2617d280 000001af db7b8330 df59c440 da77fea8 c11bd17c 00000200
[ 1851.979053] fe60: da77fea4 da77fe70 c019c008 c019bd84 df5a4140 c1103c6c 00000000 da77fea4
[ 1851.987179] fe80: df59c440 da77fea4 c1102d00 c10b3440 1e4e9000 00000282 da77feec da77fea8
[ 1851.995304] fea0: c019c158 c019bf20 00000000 df59d5f8 da77ff0c da77fec0 c019ea04 c01af384
[ 1852.003429] fec0: a54fec74 000001af c1102084 00000001 c11bcd08 00000100 00000002 ffffe000
[ 1852.011554] fee0: da77ff4c da77fef0 c0101614 c019c090 00000010 de819000 e1003000 00400040
[ 1852.019679] ff00: c1102d00 00025e29 c0b023a8 0000000a c11f4c40 c1103c6c c10af310 c1102080
[ 1852.027804] ff20: c0186bf8 c10b7b3c 00000000 00000000 00000001 de819000 e1003000 6e5f9d25
[ 1852.035929] ff40: da77ff5c da77ff50 c012c998 c01014f4 da77ff84 da77ff60 c01818f4 c012c8c0
[ 1852.044054] ff60: c11043f8 c1168010 e100200c e1002000 da77ffb0 e1003000 da77ffac da77ff88
[ 1852.052178] ff80: c01014a0 c0181890 b6d8875e 20070030 ffffffff 10c5387d 10c5387d a54fec30
[ 1852.060303] ffa0: 00000000 da77ffb0 c010e614 c0101450 00000b98 000003e8 b6d88688 0002eaba
[ 1852.068427] ffc0: a556b64c a54fec30 b6f86ce8 a54fec70 a54fec44 a54fec30 6e5f9d25 00000000
[ 1852.076551] ffe0: 2d4ca952 a54febf0 b361d339 b6d8875e 20070030 ffffffff 00000000 00000000
[ 1852.084692] [<c028c0f4>] (kmem_cache_alloc) from [<c08958f0>] (__alloc_skb+0x54/0x140)
[ 1852.092568] [<c08958f0>] (__alloc_skb) from [<c08b965c>] (__neigh_notify+0x4c/0xdc)
[ 1852.100181] [<c08b965c>] (__neigh_notify) from [<c08be820>] (neigh_timer_handler+0x194/0x278)
[ 1852.108657] [<c08be820>] (neigh_timer_handler) from [<c019bdc4>] (call_timer_fn+0x4c/0x19c)
[ 1852.116959] [<c019bdc4>] (call_timer_fn) from [<c019c008>] (expire_timers+0xf4/0x170)
[ 1852.124742] [<c019c008>] (expire_timers) from [<c019c158>] (run_timer_softirq+0xd4/0x1cc)
[ 1852.132870] [<c019c158>] (run_timer_softirq) from [<c0101614>] (__do_softirq+0x12c/0x378)
[ 1852.140999] [<c0101614>] (__do_softirq) from [<c012c998>] (irq_exit+0xe4/0x15c)
[ 1852.148266] [<c012c998>] (irq_exit) from [<c01818f4>] (__handle_domain_irq+0x70/0xc4)
[ 1852.156049] [<c01818f4>] (__handle_domain_irq) from [<c01014a0>] (gic_handle_irq+0x5c/0xa0)
[ 1852.164349] [<c01014a0>] (gic_handle_irq) from [<c010e614>] (__irq_usr+0x54/0x80)
[ 1852.171779] Exception stack(0xda77ffb0 to 0xda77fff8)
[ 1852.176795] ffa0: 00000b98 000003e8 b6d88688 0002eaba
[ 1852.184920] ffc0: a556b64c a54fec30 b6f86ce8 a54fec70 a54fec44 a54fec30 6e5f9d25 00000000
[ 1852.193043] ffe0: 2d4ca952 a54febf0 b361d339 b6d8875e 20070030 ffffffff
[ 1852.199615] Code: e121f00c e35a0000 0a000002 e5943014 (e79a3003)
[ 1852.205765] ---[ end trace eeb67939bd037a21 ]---
[ 1852.210418] Kernel panic - not syncing: Fatal exception in interrupt
[ 1852.216750] CPU2: stopping
[ 1852.219449] CPU: 2 PID: 164 Comm: systemd-journal Tainted: G D 4.14.95-bpi-r2-main #49
[ 1852.228431] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1852.233982] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 1852.241680] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 1852.248860] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 1852.256212] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 1852.263734] [<c01014e0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 1852.271165] Exception stack(0xdde57eb0 to 0xdde57ef8)
[ 1852.276183] 7ea0: 004e6190 beffffff 00000055 00000010
[ 1852.284308] 7ec0: ffffe000 00000051 004e6180 80808080 deb6d01c fefefeff 00000ff0 dde57f34
[ 1852.292431] 7ee0: 00000fe0 dde57f00 c04a9fd4 c0aa688c 20000013 ffffffff
[ 1852.299004] [<c010e24c>] (__irq_svc) from [<c0aa688c>] (__get_user_4+0x0/0x20)
[ 1852.306177] CPU1: stopping
[ 1852.308869] CPU: 1 PID: 402 Comm: rs:main Q:Reg Tainted: G D 4.14.95-bpi-r2-main #49
[ 1852.317679] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1852.323219] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 1852.330914] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 1852.338092] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 1852.345443] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 1852.352964] [<c01014e0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 1852.360395] Exception stack(0xdc0d5da0 to 0xdc0d5de8)
[ 1852.365413] 5da0: c1232c48 a0030013 00000007 00004fbe c1232c48 dec3a000 00000000 00000076
[ 1852.373537] 5dc0: 00000fff dcd36400 dc18a076 dc0d5dfc dc0d5e00 dc0d5df0 c052f398 c0ac2f24
[ 1852.381658] 5de0: 80030013 ffffffff
[ 1852.385127] [<c010e24c>] (__irq_svc) from [<c0ac2f24>] (_raw_spin_unlock_irqrestore+0x30/0x34)
[ 1852.393686] [<c0ac2f24>] (_raw_spin_unlock_irqrestore) from [<c052f398>] (uart_write+0x128/0x194)
[ 1852.402505] [<c052f398>] (uart_write) from [<c0514660>] (n_tty_write+0x1c8/0x454)
[ 1852.409942] [<c0514660>] (n_tty_write) from [<c05103c4>] (tty_write+0x19c/0x378)
[ 1852.417296] [<c05103c4>] (tty_write) from [<c029fd28>] (__vfs_write+0x38/0x130)
[ 1852.424563] [<c029fd28>] (__vfs_write) from [<c029ffb4>] (vfs_write+0xb4/0x178)
[ 1852.431829] [<c029ffb4>] (vfs_write) from [<c02a01a8>] (SyS_write+0x4c/0xa0)
[ 1852.438833] [<c02a01a8>] (SyS_write) from [<c0108c80>] (ret_fast_syscall+0x0/0x54)
[ 1852.446352] CPU3: stopping
[ 1852.449046] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G D 4.14.95-bpi-r2-main #49
[ 1852.457338] Hardware name: Mediatek Cortex-A7 (Device Tree)
[ 1852.462878] [<c0113358>] (unwind_backtrace) from [<c010d580>] (show_stack+0x20/0x24)
[ 1852.470574] [<c010d580>] (show_stack) from [<c0aa8e18>] (dump_stack+0x94/0xa8)
[ 1852.477753] [<c0aa8e18>] (dump_stack) from [<c011124c>] (handle_IPI+0x358/0x378)
[ 1852.485103] [<c011124c>] (handle_IPI) from [<c01014e0>] (gic_handle_irq+0x9c/0xa0)
[ 1852.492625] [<c01014e0>] (gic_handle_irq) from [<c010e24c>] (__irq_svc+0x6c/0x90)
[ 1852.500055] Exception stack(0xde947f38 to 0xde947f80)
[ 1852.505071] 7f20: 00000000 000fa8e8
[ 1852.513195] 7f40: 1e51c000 c011f8e0 ffffe000 c1103ccc c1103c6c c11bc85f c0d2c0e0 00000001
[ 1852.521320] 7f60: 00000000 de947f94 de947f98 de947f88 c01098ac c01098b0 60000013 ffffffff
[ 1852.529447] [<c010e24c>] (__irq_svc) from [<c01098b0>] (arch_cpu_idle+0x48/0x4c)
[ 1852.536799] [<c01098b0>] (arch_cpu_idle) from [<c0ac2d88>] (default_idle_call+0x30/0x3c)
[ 1852.544841] [<c0ac2d88>] (default_idle_call) from [<c016e3b0>] (do_idle+0xec/0x150)
[ 1852.552451] [<c016e3b0>] (do_idle) from [<c016e6b0>] (cpu_startup_entry+0x28/0x2c)
[ 1852.559974] [<c016e6b0>] (cpu_startup_entry) from [<c0110c60>] (secondary_start_kernel+0x170/0x194)
[ 1852.568962] [<c0110c60>] (secondary_start_kernel) from [<801018ec>] (0x801018ec)
[ 1852.576318] ---[ end Kernel panic - not syncing: Fatal exception in interrupt

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