Hi, I am getting the following warning on a imx6ul-evk board running linux-next 20180105:
[ 9.233290] ------------[ cut here ]------------ [ 9.242068] WARNING: CPU: 0 PID: 0 at ./include/linux/netfilter.h:233 arp_rcv+0x1f8/0x228 [ 9.250381] Modules linked in: [ 9.253633] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.15.0-rc6-next-20180104-dirty #2 [ 9.261764] Hardware name: Freescale i.MX6 Ultralite (Device Tree) [ 9.268065] Backtrace: [ 9.270719] [<c010d188>] (dump_backtrace) from [<c010d448>] (show_stack+0x18/0x1c) [ 9.278438] r7:00000000 r6:60000153 r5:00000000 r4:c1079878 [ 9.284258] [<c010d430>] (show_stack) from [<c0a32468>] (dump_stack+0xb4/0xe8) [ 9.291641] [<c0a323b4>] (dump_stack) from [<c01260ac>] (__warn+0xf0/0x11c) [ 9.298763] r9:d8053000 r8:000000e9 r7:00000009 r6:c0da3bdc r5:00000000 r4:00000000 [ 9.306662] [<c0125fbc>] (__warn) from [<c01261f0>] (warn_slowpath_null+0x44/0x50) [ 9.314383] r8:d8053000 r7:00000608 r6:c08873f8 r5:000000e9 r4:c0da3bdc [ 9.321243] [<c01261ac>] (warn_slowpath_null) from [<c08873f8>] (arp_rcv+0x1f8/0x228) [ 9.329215] r6:c0887200 r5:c107ac58 r4:d899b240 [ 9.333999] [<c0887200>] (arp_rcv) from [<c07fe680>] (__netif_receive_skb_core+0x878/0xbd4) [ 9.342491] r6:c0887200 r5:c100ac8c r4:d899b240 [ 9.347265] [<c07fde08>] (__netif_receive_skb_core) from [<c0800fe0>] (__netif_receive_skb+0x2c/0x8c) [ 9.356643] r10:00000080 r9:d8053000 r8:e0a26000 r7:c107ab0d r6:c1008908 r5:d899b240 [ 9.364598] r4:c10099c4 [ 9.367288] [<c0800fb4>] (__netif_receive_skb) from [<c0804c00>] (netif_receive_skb_internal+0x7c/0x354) [ 9.376904] r5:d899b240 r4:c10099c4 [ 9.380635] [<c0804b84>] (netif_receive_skb_internal) from [<c0805d5c>] (napi_gro_receive+0x88/0xa4) [ 9.389918] r8:e0a26000 r7:00000001 r6:d899b240 r5:d899b240 r4:00000003 [ 9.396784] [<c0805cd4>] (napi_gro_receive) from [<c064609c>] (fec_enet_rx_napi+0x3a8/0x9b8) [ 9.405357] r5:d8054000 r4:00000000 [ 9.409093] [<c0645cf4>] (fec_enet_rx_napi) from [<c080552c>] (net_rx_action+0x220/0x334) [ 9.417431] r10:dbbdfa00 r9:c1001d94 r8:00000040 r7:0000012c r6:ffff8e6b r5:00000001 [ 9.425384] r4:d8053710 [ 9.428075] [<c080530c>] (net_rx_action) from [<c01022d0>] (__do_softirq+0x128/0x2a0) [ 9.436063] r10:40000003 r9:c1003080 r8:00000100 r7:c100308c r6:c1000000 r5:00000003 [ 9.444018] r4:00000000 [ 9.446708] [<c01021a8>] (__do_softirq) from [<c012c16c>] (irq_exit+0x14c/0x1a8) [ 9.454262] r10:e080a000 r9:d8004400 r8:00000001 r7:00000000 r6:c1008a98 r5:00000000 [ 9.462218] r4:ffffe000 [ 9.464911] [<c012c020>] (irq_exit) from [<c0180464>] (__handle_domain_irq+0x74/0xe8) [ 9.472879] r5:00000000 r4:c0f7cc24 [ 9.476614] [<c01803f0>] (__handle_domain_irq) from [<c0467ebc>] (gic_handle_irq+0x64/0xc4) [ 9.485121] r9:c1028344 r8:c1001e98 r7:00000000 r6:000003ff r5:000003eb r4:e080a00c [ 9.493016] [<c0467e58>] (gic_handle_irq) from [<c01019f0>] (__irq_svc+0x70/0x98) [ 9.500632] Exception stack(0xc1001e98 to 0xc1001ee0) [ 9.505822] 1e80: 00000001 00000001 [ 9.514157] 1ea0: 00000000 c100bf80 25963796 00000002 00000002 dbbde5c8 26545294 00000002 [ 9.522491] 1ec0: 00000000 c1001f14 c1001eb8 c1001ee8 c01724fc c0724464 20000153 ffffffff [ 9.530824] r10:00000000 r9:c1000000 r8:26545294 r7:c1001ecc r6:ffffffff r5:20000153 [ 9.538778] r4:c0724464 [ 9.541470] [<c07242f4>] (cpuidle_enter_state) from [<c0724630>] (cpuidle_enter+0x1c/0x20) [ 9.549893] r10:c100f6a8 r9:dbbde5c8 r8:c0f7c5c0 r7:c1008978 r6:00000001 r5:c100892c [ 9.557857] r4:c1000000 r3:dbbde5c8 [ 9.561589] [<c0724614>] (cpuidle_enter) from [<c0169dd4>] (call_cpuidle+0x28/0x44) [ 9.569399] [<c0169dac>] (call_cpuidle) from [<c016a0bc>] (do_idle+0x1bc/0x230) [ 9.576861] [<c0169f00>] (do_idle) from [<c016a4e0>] (cpu_startup_entry+0x20/0x24) [ 9.584587] r10:c0f63a50 r9:c1008908 r8:c107b480 r7:c1008900 r6:c107b480 r5:00000002 [ 9.592546] r4:000000c4 r3:c0f75354 [ 9.596283] [<c016a4c0>] (cpu_startup_entry) from [<c0a47720>] (rest_init+0x210/0x25c) [ 9.604372] [<c0a47510>] (rest_init) from [<c0f00d60>] (start_kernel+0x390/0x418) [ 9.611998] r5:ffffffff r4:c107b4cc [ 9.615723] [<c0f009d0>] (start_kernel) from [<00000000>] ( (null)) [ 9.622235] r10:10c5387d r9:410fc075 r8:83000000 r7:00000000 r6:10c0387d r5:00000051 [ 9.630191] r4:c0f0032c [ 9.632851] ---[ end trace 2d5d5f79c0c8da59 ]--- Does anyone know how to fix it? Thanks