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kernel: check for error label stack underflow in nexterror()

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cinap_lenrek 2013-12-31 07:29:55 +01:00
parent 50bda3d522
commit 00ff4beaa7
1 changed files with 1 additions and 0 deletions
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sys/src/9/port/proc.c
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@ -1467,6 +1467,7 @@ error(char *err)
void void
nexterror(void) nexterror(void)
{ {
assert(up->nerrlab > 0);
gotolabel(&up->errlab[--up->nerrlab]); gotolabel(&up->errlab[--up->nerrlab]);
} }