Hello,
I have an odd issue on my powerpc 8xx board.
I am running latest 4.14 and get the following SIGSEGV which appears
more or less randomly.
[ 9.190354] touch[91]: unhandled signal 11 at 67807b58 nip 777cf114
lr 777cf100 code 30001
[ 24.634810] ifconfig[160]: unhandled signal 11 at 67ae7b58 nip
77aaf114 lr 77aaf100 code 30001
[ 30.383737] default.deconfi[231]: unhandled signal 11 at 67c8bb58 nip
77c53114 lr 77c53100 code 30001
[ 37.655588] S15syslogd[251]: unhandled signal 11 at 6784fb58 nip
77817114 lr 77817100 code 30001
[ 40.974649] snmpd[315]: unhandled signal 11 at 67e0bb58 nip 77dd3114
lr 77dd3100 code 30001
[ 43.220964] exe[338]: unhandled signal 11 at 67cd3b58 nip 77c9b114 lr
77c9b100 code 30001
[ 44.191494] exe[348]: unhandled signal 11 at 67c1fb58 nip 77be7114 lr
77be7100 code 30001
[ 59.175022] sleep[655]: unhandled signal 11 at 67ca3b58 nip 77c6b114
lr 77c6b100 code 30001
[ 61.853406] smcroute[705]: unhandled signal 11 at 6789bb58 nip
77863114 lr 77863100 code 30001
[ 64.662431] smcroute[778]: unhandled signal 11 at 67e03b58 nip
77dcb114 lr 77dcb100 code 30001
[ 65.623103] smcroute[795]: unhandled signal 11 at 67bdbb58 nip
77ba3114 lr 77ba3100 code 30001
[ 66.579416] exe[825]: unhandled signal 11 at 67edbb58 nip 77ea3114 lr
77ea3100 code 30001
[ 68.382941] exe[864]: unhandled signal 11 at 6789bb58 nip 77863114 lr
77863100 code 30001
[ 95.187346] exe[1147]: unhandled signal 11 at 67e83b58 nip 77e4b114
lr 77e4b100 code 30001
[ 105.238218] exe[1158]: unhandled signal 11 at 67ca3b58 nip 77c6b114
lr 77c6b100 code 30001
[ 127.556731] exe[1181]: unhandled signal 11 at 67cc3b58 nip 77c8b114
lr 77c8b100 code 30001
[ 135.558982] exe[1195]: unhandled signal 11 at 678d7b58 nip 7789f114
lr 7789f100 code 30001
[ 147.579142] exe[1216]: unhandled signal 11 at 67c6bb58 nip 77c33114
lr 77c33100 code 30001
[ 175.538747] exe[1262]: unhandled signal 11 at 67e2fb58 nip 77df7114
lr 77df7100 code 30001
[ 186.552670] exe[1275]: unhandled signal 11 at 6781fb58 nip 777e7114
lr 777e7100 code 30001
[ 230.629786] exe[1344]: unhandled signal 11 at 67cb3b58 nip 77c7b114
lr 77c7b100 code 30001
[ 249.640396] repair-service.[1369]: unhandled signal 11 at 67e5fb58
nip 77e27114 lr 77e27100 code 30001
[ 378.003410] exe[1593]: unhandled signal 11 at 678d7b58 nip 7789f114
lr 7789f100 code 30001
[ 414.060661] exe[1656]: unhandled signal 11 at 67cc7b58 nip 77c8f114
lr 77c8f100 code 30001
The problem is present in 3.13, 3.14 and 3.15.
I bisected its appearance with commit 6b31d5955cb29 ("mm, oom: fix
potential data corruption when oom_reaper races with writer")
And I bisected its disappearance with commit 99cd1302327a2 ("powerpc:
Deliver SEGV signal on pkey violation")
Looking at those two commits, especially the one which makes it
dissapear, I'm quite sceptic. Any idea on what could be the cause and/or
how to investigate further ?
Thanks
Christophe
