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ref: 00ff4beaa76fb3dde4d1222408d1308f4077dde1
parent: 50bda3d5225190cd8e2b3c7ce7aa3c1ea1759e40
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Tue Dec 31 02:29:55 EST 2013

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

--- a/sys/src/9/port/proc.c

+++ b/sys/src/9/port/proc.c

@@ -1467,6 +1467,7 @@

 void

 nexterror(void)

 {

+	assert(up->nerrlab > 0);

 	gotolabel(&up->errlab[--up->nerrlab]);

 }

-- 

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