panic on application core dump?
Sean Bruno
sbruno at ignoranthack.me
Sun Feb 22 17:34:35 UTC 2015
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> Err. Is it easily reproducable in your setup ? The core file vnode
> is indeed unreferenced before notification is sent.
>
> Try this.
>
> diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c index
> 41da3dd..57f66b0 100644
Restarted my non-deterministic test case. Three instances of qemu
core dumped and the system did *not* panic.
However, this appears to be interfering with signal handling and
reaping. Applications seems to stall out and become
unkillable/unreapable. I have to reboot the system via panic/reset.
sean
last pid: 41009; load averages: 0.46, 0.29, 0.21
up 0+12:18:57 17:33:37
72 processes: 1 running, 69 sleeping, 2 zombie
CPU: 0.9% user, 0.0% nice, 0.2% system, 0.0% interrupt, 98.8% idle
Mem: 15M Active, 6675M Inact, 7201M Wired, 244K Cache, 2010M Free
ARC: 4678M Total, 910M MFU, 3001M MRU, 6748K Anon, 70M Header, 691M Other
Swap: 16G Total, 16G Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU
COMMAND
718 www 1 20 0 28708K 6636K kqread 12 0:08 0.70%
nginx
1430 root 1 52 0 17180K 3448K wait 13 2:28 0.44% sh
1276 sbruno 1 20 0 21548K 8796K select 11 4:37 0.17% tmux
40832 root 1 20 0 22000K 3072K CPU7 7 0:00 0.08% top
1267 sbruno 1 20 0 86528K 7580K select 15 0:04 0.02% sshd
695 root 1 20 0 25496K 4884K select 9 0:03 0.01% ntpd
698 root 1 20 0 14492K 1992K select 7 0:04 0.01%
powerd
1288 root 1 20 0 17180K 5336K zfs 14 1:13 0.00% sh
79939 root 1 52 0 17180K 3384K wait 10 0:03 0.00% sh
750 root 1 20 0 24164K 5444K select 2 0:01 0.00%
sendmail
444 unbound 1 20 0 34780K 9672K select 7 0:00 0.00%
unbound
40727 root 1 20 0 17180K 5276K wait 14 0:00 0.00% sh
68893 root 1 26 0 17180K 5336K wait 3 0:00 0.00% sh
80937 root 1 24 0 17180K 5336K wait 13 0:00 0.00% sh
55102 root 1 24 0 17180K 5336K wait 3 0:00 0.00% sh
35713 root 1 25 0 17180K 5336K wait 10 0:00 0.00% sh
48828 root 1 24 0 17180K 5336K wait 6 0:00 0.00% sh
97473 root 1 26 0 17180K 5336K wait 0 0:00 0.00% sh
64113 root 1 24 0 17180K 5336K wait 5 0:00 0.00% sh
46980 root 1 27 0 17180K 5336K wait 12 0:00 0.00% sh
80439 root 1 24 0 17180K 5336K wait 7 0:00 0.00% sh
44960 root 1 20 0 17180K 5276K wait 3 0:00 0.00% sh
49661 root 1 27 0 17180K 5336K wait 8 0:00 0.00% sh
78496 root 1 52 0 17180K 5336K zfs 0 0:00 0.00% sh
69491 root 1 27 0 17180K 5336K wait 6 0:00 0.00% sh
75907 root 1 52 0 17180K 5336K zfs 8 0:00 0.00% sh
534 root 1 20 0 14524K 2200K select 12 0:00 0.00%
syslogd
757 root 1 52 0 16620K 2296K nanslp 13 0:00 0.00% cron
747 root 1 20 0 59148K 6620K select 6 0:00 0.00% sshd
26179 root 1 31 0 23652K 4044K pause 14 0:00 0.00% csh
79371 root 1 20 0 17180K 5336K wait 9 0:00 0.00% sh
1268 sbruno 1 23 0 23652K 3736K pause 5 0:00 0.00% tcsh
1265 root 1 22 0 86528K 7284K select 11 0:00 0.00% sshd
1283 root 1 21 0 23652K 4044K pause 3 0:00 0.00% csh
1277 sbruno 1 23 0 23652K 3748K pause 6 0:00 0.00% tcsh
1282 sbruno 1 21 0 74188K 6348K wait 11 0:00 0.00% su
24565 sbruno 1 20 0 23652K 3740K pause 8 0:00 0.00% tcsh
438 root 1 20 0 13588K 4788K select 11 0:00 0.00% devd
26119 sbruno 1 20 0 74188K 6348K wait 13 0:00 0.00% su
753 smmsp 1 20 0 24164K 5392K pause 1 0:00 0.00%
sendmail
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