diff options
| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2017-10-23 06:08:18 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2017-10-23 06:08:18 +0200 |
| commit | 83fe7aaa5ce4776c394cb9edd89189b62efb89a9 (patch) | |
| tree | d9a4584c66077f291164b1dcc90d8ac9e7c9d364 /sys/src/libc | |
| parent | e3d8fe9d4a1085cbf7237411bcd1996613334994 (diff) | |
upas/smtpd: don't call syslog() from the note handler, this can deadlock
when the alarm hits while the process is currently in syslog(), holding
the sl lock, then calling syslog again will deadlock:
/proc/1729193/text:386 plan 9 executable
/sys/lib/acid/port
/sys/lib/acid/386
acid: lstk()
sleep()+0x7 /sys/src/libc/9syscall/sleep.s:5
lock(lk=0x394d8)+0xb7 /sys/src/libc/port/lock.c:25
i=0x3e8
syslog(logname=0x41c64,cons=0x0,fmt=0x41c6a)+0x2d /sys/src/libc/9sys/syslog.c:60
err=0x79732f27
d=0x0
ctim=0x0
buf=0x0
p=0x0
arg=0x0
n=0x0
catchalarm(msg=0xdfffc854)+0x7a /sys/src/cmd/upas/smtp/smtpd.c:71
notifier+0x30 /sys/src/libc/port/atnotify.c:15
Diffstat (limited to 'sys/src/libc')
0 files changed, 0 insertions, 0 deletions