Hi, I'm running into a kernel crash while using the functionfs driver on 4.9 and 4.12 kernels. This is reproducible by using any of the aio syscalls with functionfs on the above kernels. The code in question is in ffs_user_copy_worker, which is a work thread that copies a bit of data into userspace. Interestingly, a set_fs(USER_DS) before copy_to_iter in the work thread will prevent the crash. I'm told though that this shouldn't be necessary if the thread does not set_fs to KERNEL_DS, which it does not (nor does the rest of the driver, at all). There is also no problem on 4.4.
Perhaps this is related to some of the mm changes in arch/arm64 that went in between 4.4 and 4.9? Alternatively, it could actually be necessary to set_fs(USER_DS) in a work thread before accessing user memory? Let us know. Thanks, Jerry Here is the full crash log: [ 215.871963] Internal error: Accessing user space memory with fs=KERNEL_DS: 9600004f [#1] PREEMPT SMP [ 215.881330] CPU: 1 PID: 1343 Comm: kworker/1:1 Tainted: G S 4.9.41-gf48b3b5b324d #1 [ 215.890314] Hardware name: HiKey960 (DT) [ 215.894319] Workqueue: events ffs_user_copy_worker [ 215.899178] task: ffffffc0b5ce5080 task.stack: ffffffc0b52bc000 [ 215.905184] PC is at __arch_copy_to_user+0xa4/0x280 [ 215.910128] LR is at copy_to_iter+0x7c/0x3e0 [ 215.914454] pc : [<ffffff8008510fa4>] lr : [<ffffff8008525c10>] pstate: 80000105 [ 215.921940] sp : ffffffc0b52bfca0 [ 215.925295] x29: ffffffc0b52bfca0 x28: ffffffc0b5322400 [ 215.930682] x27: ffffffc0b324fb98 x26: 0000000000000018 [ 215.936069] x25: ffffffc0a8417a10 x24: 0000000000000018 [ 215.941456] x23: 0000000000000000 x22: 0000000000000000 [ 215.946845] x21: ffffffc0b0e5a380 x20: 0000000000000018 [ 215.952249] x19: ffffffc0a8417a50 x18: 0000000000000000 [ 215.957686] x17: 0000000000000000 x16: 0000000000000000 [ 215.963121] x15: 0000000000000000 x14: 0000000000000000 [ 215.968557] x13: 0000000000000000 x12: 0000000000000000 [ 215.973991] x11: 0000000000000001 x10: 0000000000000a60 [ 215.979432] x9 : ffffffc0b52bc000 x8 : 0000001000000001 [ 215.984870] x7 : 000006c445545257 x6 : 0000007fb78418d8 [ 215.990299] x5 : 0000007fb78418f0 x4 : 0000000000000000 [ 215.995728] x3 : 0000000000000010 x2 : 0000000000000018 [ 216.001162] x1 : ffffffc0b324fb90 x0 : 0000007fb78418d8 [ 216.006606] [ 216.006606] SP: 0xffffffc0b52bfc20: [ 216.011683] fc20 [ 216.013469] 00000000 00000000[ 216.016598] 00000000 00000000[ 216.019722] 00000018 00000000[ 216.022846] a8417a10 ffffffc0[ 216.025971] [ 216.027493] fc40 [ 216.029282] 00000018 00000000[ 216.032403] b324fb98 ffffffc0[ 216.035526] b5322400 ffffffc0[ 216.038652] b52bfca0 ffffffc0[ 216.041778] [ 216.043296] fc60 [ 216.045082] 08525c10 ffffff80[ 216.048209] b52bfca0 ffffffc0[ 216.051334] 08510fa4 ffffff80[ 216.054459] 80000105 00000000[ 216.057584] [ 216.059105] fc80 [ 216.060889] 082000dc ffffff80[ 216.064016] b5ce5888 ffffffc0[ 216.067142] ffffffff ffffffff[ 216.070264] 00000018 00000000[ 216.073384] [ 216.074903] fca0 [ 216.076683] b52bfd20 ffffffc0[ 216.079808] 08864224 ffffff80[ 216.082934] a8417a50 ffffffc0[ 216.086062] a8417a00 ffffffc0[ 216.089185] [ 216.090703] fcc0 [ 216.092487] 00000018 00000000[ 216.095612] 00000000 00000000[ 216.098736] 00000000 00000000[ 216.101859] 00000018 00000000[ 216.104981] [ 216.106500] fce0 [ 216.108288] 00000000 00000000[ 216.111413] 00000000 00000000[ 216.114537] 00000000 00000000[ 216.117662] b5322400 ffffffc0[ 216.120786] [ 216.122303] fd00 [ 216.124089] a8417a50 ffffffc0[ 216.127214] a8417a00 ffffffc0[ 216.130339] 00000018 00000000[ 216.133464] 00000000 00000000[ 216.136590] [ 216.138114] [ 216.138114] X1: 0xffffffc0b324fb10: [ 216.143184] fb10 [ 216.144969] b324fb08 ffffffc0[ 216.148093] b324fb18 ffffffc0[ 216.151215] b324fb18 ffffffc0[ 216.154340] b324fb28 ffffffc0[ 216.157464] [ 216.158985] fb30 [ 216.160764] b324fb28 ffffffc0[ 216.163890] 00000000 00000000[ 216.167016] 00000000 00000000[ 216.170143] 000000fb 00000000[ 216.173263] [ 216.174785] fb50 [ 216.176565] ac2ab000 ffffffc0[ 216.179688] 00000000 00000000[ 216.182818] ffffaff9 00000000[ 216.185940] 00000000 00000000[ 216.189065] [ 216.190584] fb70 [ 216.192365] 00000000 00000000[ 216.195487] 00000000 00000000[ 216.198614] 45545257 000006c4[ 216.201737] 00000001 00000010[ 216.204858] [ 216.206378] fb90 [ 216.208159] 0000028e baabada8[ 216.211284] a8417a00 ffffffc0[ 216.214412] 00000000 00000000[ 216.217540] ae5ceb00 ffffffc0[ 216.220664] [ 216.222184] fbb0 [ 216.223968] 08864580 ffffff80[ 216.227094] b7a3b000 0000007f[ 216.230219] 00000000 00000000[ 216.233340] 00000100 dead0000[ 216.236467] [ 216.237986] fbd0 [ 216.239772] 00000200 dead0000[ 216.242895] 00000000 00000000[ 216.246016] 00000000 00000000[ 216.249143] 00000000 00000000[ 216.252264] [ 216.253786] fbf0 [ 216.255572] 00000000 00000000[ 216.258697] 00000000 00000000[ 216.261822] 00070007 ffffffc0[ 216.264945] b324fc08 ffffffc0[ 216.268071] [ 216.269596] [ 216.269596] X9: 0xffffffc0b52bbf80: [ 216.274675] bf80 [ 216.276458] 00000000 00000000[ 216.279583] 00000000 00000000[ 216.282701] 00000000 00000000[ 216.285823] 00000000 00000000[ 216.288947] [ 216.290466] bfa0 [ 216.292250] 00000000 00000000[ 216.295372] 00000000 00000000[ 216.298501] 00000000 00000000[ 216.301627] 00000000 00000000[ 216.304749] [ 216.306267] bfc0 [ 216.308048] 00000000 00000000[ 216.311172] 00000005 00000000[ 216.314296] 00000000 00000000[ 216.317417] 00000000 00000000[ 216.320543] [ 216.322063] bfe0 [ 216.323846] 00000000 00000000[ 216.326974] 00000000 00000000[ 216.330097] 00000000 00000000[ 216.333223] 00000000 00000000[ 216.336346] [ 216.337868] c000 [ 216.339652] 00000002 00000000[ 216.342778] ffffffff ffffffff[ 216.345905] b5ce5080 ffffffc0[ 216.349028] 00000001 00000001[ 216.352156] [ 216.353679] c020 [ 216.355466] 57ac6e9d 00000000[ 216.358590] b52bc028 ffffffc0[ 216.361714] b52bc028 ffffffc0[ 216.364836] 080f11ac ffffff80[ 216.367961] [ 216.369479] c040 [ 216.371266] 00000006 00000000[ 216.374388] 0872c710 ffffff80[ 216.377515] b537e000 ffffffc0[ 216.380637] 09290fe0 ffffff80[ 216.383758] [ 216.385278] c060 [ 216.387059] 00000000 00000000[ 216.390182] 00000000 00000000[ 216.393306] 00000000 00000000[ 216.396427] 00000000 00000000[ 216.399551] [ 216.401082] [ 216.401082] X19: 0xffffffc0a84179d0: [ 216.406242] 79d0 [ 216.408024] 00000000 00000000[ 216.411151] a84179d8 ffffffc0[ 216.414272] a84179d8 ffffffc0[ 216.417397] a84179e8 ffffffc0[ 216.420518] [ 216.422038] 79f0 [ 216.423820] a84179e8 ffffffc0[ 216.426946] a84189b0 ffffffc0[ 216.430066] 00000101 00000000[ 216.433189] b0ed4b00 ffffffc0[ 216.436311] [ 216.437831] 7a10 [ 216.439615] 00000000 ffffff80[ 216.442738] 00000000 00000000[ 216.445863] 00000018 00000000[ 216.448984] b0e5a380 ffffffc0[ 216.452111] [ 216.453631] 7a30 [ 216.455415] 00000001 00000000[ 216.458539] b0e5a380 ffffffc0[ 216.461659] b324fb80 ffffffc0[ 216.464778] b3f8f140 ffffffc0[ 216.467906] [ 216.469423] 7a50 [ 216.471205] 00000040 00000000[ 216.474328] a8417a58 ffffffc0[ 216.477452] a8417a58 ffffffc0[ 216.480575] 088641b8 ffffff80[ 216.483695] [ 216.485216] 7a70 [ 216.486996] b5027800 ffffffc0[ 216.490124] a8417300 ffffffc0[ 216.493247] b3022400 ffffffc0[ 216.496368] 00001000 00000000[ 216.499489] [ 216.501009] 7a90 [ 216.502794] 029d32c0 ffffffbf[ 216.505920] 00001000 00000000[ 216.509041] 029d3300 ffffffbf[ 216.512167] 00001000 00000000[ 216.515291] [ 216.516811] 7ab0 [ 216.518597] 029d3340 ffffffbf[ 216.521726] 00001000 00000000[ 216.524851] 029d3380 ffffffbf[ 216.527975] 00001000 00000000[ 216.531098] [ 216.532621] [ 216.532621] X21: 0xffffffc0b0e5a300: [ 216.537783] a300 [ 216.539568] 093d47a0 ffffff80[ 216.542692] b395ca00 ffffffc0[ 216.545812] b0eaf890 ffffffc0[ 216.548936] b3fa8890 ffffffc0[ 216.552061] [ 216.553580] a320 [ 216.555365] b0e5a2a0 ffffffc0[ 216.558493] b395ca38 ffffffc0[ 216.561615] 00000000 00000000[ 216.564740] 00000000 00000000[ 216.567862] [ 216.569378] a340 [ 216.571161] 00000000 00000000[ 216.574282] 00000000 00000000[ 216.577405] 00000000 00000000[ 216.580528] 00000000 00000000[ 216.583653] [ 216.585174] a360 [ 216.586957] 00000000 00000000[ 216.590078] 00000000 00000000[ 216.593204] 00000000 00000000[ 216.596329] 00000000 00000000[ 216.599453] [ 216.600971] a380 [ 216.602755] b78418d8 0000007f[ 216.605878] 00000018 00000000[ 216.609003] 00000200 00000000[ 216.612124] b0e5a398 ffffffc0[ 216.615247] [ 216.616764] a3a0 [ 216.618548] b0e5a398 ffffffc0[ 216.621666] 08248308 ffffff80[ 216.624789] 00000000 00000000[ 216.627912] 00000000 00000000[ 216.631033] [ 216.632555] a3c0 [ 216.634339] 00000000 00000000[ 216.637463] 00000000 00000000[ 216.640587] 00000000 00000000[ 216.643716] 00000000 00000000[ 216.646838] [ 216.648358] a3e0 [ 216.650141] 00000000 00000000[ 216.653266] 00000000 00000000[ 216.656390] 00000000 00000000[ 216.659513] 00000000 00000000[ 216.662637] [ 216.664164] [ 216.664164] X25: 0xffffffc0a8417990: [ 216.669324] 7990 [ 216.671108] 00000000 00000000[ 216.674236] b3b0f840 ffffffc0[ 216.677357] 00000000 00000000[ 216.680481] 00000000 00000000[ 216.683603] [ 216.685120] 79b0 [ 216.686902] 00000000 00000000[ 216.690028] 00000000 00000000[ 216.693154] 00000000 00000000[ 216.696279] ac3e2900 ffffffc0[ 216.699400] [ 216.700917] 79d0 [ 216.702703] 00000000 00000000[ 216.705823] a84179d8 ffffffc0[ 216.708948] a84179d8 ffffffc0[ 216.712070] a84179e8 ffffffc0[ 216.715193] [ 216.716712] 79f0 [ 216.718493] a84179e8 ffffffc0[ 216.721622] a84189b0 ffffffc0[ 216.724747] 00000101 00000000[ 216.727872] b0ed4b00 ffffffc0[ 216.730995] [ 216.732514] 7a10 [ 216.734296] 00000000 ffffff80[ 216.737421] 00000000 00000000[ 216.740544] 00000018 00000000[ 216.743669] b0e5a380 ffffffc0[ 216.746790] [ 216.748311] 7a30 [ 216.750095] 00000001 00000000[ 216.753216] b0e5a380 ffffffc0[ 216.756340] b324fb80 ffffffc0[ 216.759464] b3f8f140 ffffffc0[ 216.762591] [ 216.764111] 7a50 [ 216.765893] 00000040 00000000[ 216.769017] a8417a58 ffffffc0[ 216.772142] a8417a58 ffffffc0[ 216.775271] 088641b8 ffffff80[ 216.778393] [ 216.779913] 7a70 [ 216.781700] b5027800 ffffffc0[ 216.784821] a8417300 ffffffc0[ 216.787941] b3022400 ffffffc0[ 216.791067] 00001000 00000000[ 216.794188] [ 216.795710] [ 216.795710] X27: 0xffffffc0b324fb18: [ 216.800870] fb18 [ 216.802654] b324fb18 ffffffc0[ 216.805778] b324fb18 ffffffc0[ 216.808906] b324fb28 ffffffc0[ 216.812032] b324fb28 ffffffc0[ 216.815154] [ 216.816676] fb38 [ 216.818460] 00000000 00000000[ 216.821584] 00000000 00000000[ 216.824707] 000000fb 00000000[ 216.827832] ac2ab000 ffffffc0[ 216.830957] [ 216.832476] fb58 [ 216.834258] 00000000 00000000[ 216.837379] ffffaff9 00000000[ 216.840504] 00000000 00000000[ 216.843627] 00000000 00000000[ 216.846750] [ 216.848270] fb78 [ 216.850056] 00000000 00000000[ 216.853180] 45545257 000006c4[ 216.856301] 00000001 00000010[ 216.859425] 0000028e baabada8[ 216.862552] [ 216.864074] fb98 [ 216.865855] a8417a00 ffffffc0[ 216.868976] 00000000 00000000[ 216.872099] ae5ceb00 ffffffc0[ 216.875218] 08864580 ffffff80[ 216.878341] [ 216.879861] fbb8 [ 216.881646] b7a3b000 0000007f[ 216.884774] 00000000 00000000[ 216.887895] 00000100 dead0000[ 216.891019] 00000200 dead0000[ 216.894143] [ 216.895660] fbd8 [ 216.897447] 00000000 00000000[ 216.900571] 00000000 00000000[ 216.903699] 00000000 00000000[ 216.906822] 00000000 00000000[ 216.909945] [ 216.911465] fbf8 [ 216.913246] 00000000 00000000[ 216.916371] 00070007 ffffffc0[ 216.919496] b324fc08 ffffffc0[ 216.922615] b324fc08 ffffffc0[ 216.925740] [ 216.927263] [ 216.927263] X28: 0xffffffc0b5322380: [ 216.932430] 2380 [ 216.934214] 00000000 5f776809[ 216.937333] 61726170 0000736d[ 216.940457] 00000000 00000000[ 216.943581] 00000000 00000000[ 216.946700] [ 216.948221] 23a0 [ 216.950002] 00000000 00000000[ 216.953126] 00000000 00000000[ 216.956252] 00000000 00000000[ 216.959377] 00000000 00000000[ 216.962500] [ 216.964018] 23c0 [ 216.965804] 00000000 00000000[ 216.968930] 00000000 00000000[ 216.972054] 00000000 00000000[ 216.975175] 00000000 00000000[ 216.978296] [ 216.979817] 23e0 [ 216.981602] 00000000 00000000[ 216.984726] 00000000 00000000[ 216.987855] 00000000 00000000[ 216.990979] 00000000 00000000[ 216.994104] [ 216.995622] 2400 [ 216.997406] 00000000 00000000[ 217.000528] be1283f0 ffffffc0[ 217.003652] a8417a50 ffffffc0[ 217.006778] 088641b8 ffffff80[ 217.009900] [ 217.011419] 2420 [ 217.013202] bff5da00 ffffffbe[ 217.016329] 00000000 00000000[ 217.019452] b5322430 ffffffc0[ 217.022575] b5322430 ffffffc0[ 217.025694] [ 217.027216] 2440 [ 217.028996] b5ce5080 ffffffc0[ 217.032122] be128280 ffffffc0[ 217.035250] be1285b0 ffffffc0[ 217.038372] 89dae250 ffffffc0[ 217.041499] [ 217.043021] 2460 [ 217.044801] ffffadcb 00000000[ 217.047926] 00000000 00000001[ 217.051054] 00000000 00000000[ 217.054178] 00000000 00000000[ 217.057299] [ 217.058822] [ 217.058822] X29: 0xffffffc0b52bfc20: [ 217.063984] fc20 [ 217.065769] 00000000 00000000[ 217.068895] 00000000 00000000[ 217.072019] 00000018 00000000[ 217.075144] a8417a10 ffffffc0[ 217.078266] [ 217.079787] fc40 [ 217.081567] 00000018 00000000[ 217.084691] b324fb98 ffffffc0[ 217.087816] b5322400 ffffffc0[ 217.090940] b52bfca0 ffffffc0[ 217.094062] [ 217.095582] fc60 [ 217.097366] 08525c10 ffffff80[ 217.100495] b52bfca0 ffffffc0[ 217.103620] 08510fa4 ffffff80[ 217.106748] 80000105 00000000[ 217.109875] [ 217.111394] fc80 [ 217.113177] 082000dc ffffff80[ 217.116302] b5ce5888 ffffffc0[ 217.119427] ffffffff ffffffff[ 217.122549] 00000018 00000000[ 217.125672] [ 217.127194] fca0 [ 217.128975] b52bfd20 ffffffc0[ 217.132099] 08864224 ffffff80[ 217.135218] a8417a50 ffffffc0[ 217.138343] a8417a00 ffffffc0[ 217.141469] [ 217.142989] fcc0 [ 217.144770] 00000018 00000000[ 217.147893] 00000000 00000000[ 217.151022] 00000000 00000000[ 217.154150] 00000018 00000000[ 217.157271] [ 217.158792] fce0 [ 217.160579] 00000000 00000000[ 217.163702] 00000000 00000000[ 217.166827] 00000000 00000000[ 217.169947] b5322400 ffffffc0[ 217.173070] [ 217.174590] fd00 [ 217.176371] a8417a50 ffffffc0[ 217.179491] a8417a00 ffffffc0[ 217.182613] 00000018 00000000[ 217.185738] 00000000 00000000[ 217.188862] [ 217.190380] [ 217.191907] Process kworker/1:1 (pid: 1343, stack limit = 0xffffffc0b52bc020) [ 217.199200] Stack: (0xffffffc0b52bfca0 to 0xffffffc0b52c0000) [ 217.205079] fca0: ffffffc0b52bfd20 ffffff8008864224 ffffffc0a8417a50 ffffffc0a8417a00 [ 217.213077] fcc0: 0000000000000018 0000000000000000 0000000000000000 0000000000000018 [ 217.221080] fce0: 0000000000000000 0000000000000000 0000000000000000 ffffffc0b5322400 [ 217.229091] fd00: ffffffc0a8417a50 ffffffc0a8417a00 0000000000000018 0000000000000000 [ 217.237094] fd20: ffffffc0b52bfd60 ffffff80080e5d88 ffffffc0b5322400 ffffffc0a8417a50 [ 217.245094] fd40: ffffffc0be128280 ffffffbebff5da00 0000000000000000 ffffffc0a8417a58 [ 217.253100] fd60: ffffffc0b52bfdb0 ffffff80080e60d4 ffffffc0be128280 ffffffc0b5322430 [ 217.261104] fd80: ffffffc0be1282a0 ffffff80091e6000 ffffffc0b52bc000 ffffff80092292e3 [ 217.269111] fda0: 0000000000000000 ffffffc0b5322430 ffffffc0b52bfe20 ffffff80080ece68 [ 217.277119] fdc0: ffffffc0b503e080 ffffffc0b52bc000 ffffff8008f7ce00 ffffffc0b5322400 [ 217.285127] fde0: ffffff80080e6078 0000000000000000 0000000000000000 0000000000000000 [ 217.293132] fe00: 0000000000000000 0000000000000000 ffffff8008f7ce00 ffffffc0b5322400 [ 217.301131] fe20: 0000000000000000 ffffff8008083680 ffffff80080ecd7c ffffffc0b503e080 [ 217.309134] fe40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.317137] fe60: 0000000000000000 0000000000000000 ffffffc0b52bfea0 ffffffc0b5322400 [ 217.325137] fe80: ffffffc000000000 ffffffc000000000 ffffffc0b52bfe90 ffffffc0b52bfe90 [ 217.333138] fea0: 0000000000000000 ffffff8000000000 ffffffc0b52bfeb0 ffffffc0b52bfeb0 [ 217.341145] fec0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.349146] fee0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.357153] ff00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.365154] ff20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.373164] ff40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.381166] ff60: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.389172] ff80: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.397172] ffa0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.405177] ffc0: 0000000000000000 0000000000000005 0000000000000000 0000000000000000 [ 217.413179] ffe0: 0000000000000000 0000000000000000 ffffffc0b52c01d0 ffffff8008082dd0 [ 217.421183] Call trace: [ 217.423688] Exception stack(0xffffffc0b52bfad0 to 0xffffffc0b52bfc00) [ 217.430270] fac0: ffffffc0a8417a50 0000008000000000 [ 217.438272] fae0: ffffffc0b52bfca0 ffffff8008510fa4 0000000000000180 ffffffc0ac07488c [ 217.446272] fb00: ffffffc0b52bfb30 ffffff8008cea524 0000000000000180 ffffffc0ac07488c [ 217.454275] fb20: 0000000000000000 ffffffc0be128b80 ffffffc0b52bfb70 ffffff80085326c8 [ 217.462280] fb40: ffffffc0b52bfc10 ffffffc0b52bfc60 ffffffc0b5ce5080 ffffffc0b5ce5080 [ 217.470284] fb60: ffffffc0ae5cea08 ffffffc0ae5ce9b0 0000007fb78418d8 ffffffc0b324fb90 [ 217.478284] fb80: 0000000000000018 0000000000000010 0000000000000000 0000007fb78418f0 [ 217.486288] fba0: 0000007fb78418d8 000006c445545257 0000001000000001 ffffffc0b52bc000 [ 217.494296] fbc0: 0000000000000a60 0000000000000001 0000000000000000 0000000000000000 [ 217.502301] fbe0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 217.510309] [<ffffff8008510fa4>] __arch_copy_to_user+0xa4/0x280 [ 217.516370] [<ffffff8008864224>] ffs_user_copy_worker+0x6c/0x120 [ 217.522513] [<ffffff80080e5d88>] process_one_work+0x14c/0x43c [ 217.528394] [<ffffff80080e60d4>] worker_thread+0x5c/0x438 [ 217.533920] [<ffffff80080ece68>] kthread+0xec/0x100 [ 217.538914] [<ffffff8008083680>] ret_from_fork+0x10/0x50 [ 217.544350] Code: a88120c7 d503201f d503201f a8c12027 (a88120c7) [ 217.551388] ---[ end trace b70eea764d93f697 ]--- [ 217.556183] Kernel panic - not syncing: Fatal exception [ 217.561497] SMP: stopping secondary CPUs [ 217.565891] Kernel Offset: disabled [ 217.569436] Memory Limit: none [ 217.572548] Rebooting in 5 seconds.. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html