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fix double free in exec

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This commit is contained in:
cinap_lenrek 2012-01-23 05:12:05 +01:00
parent e2bbb41a30
commit 8ef32ed38c
1 changed files with 5 additions and 3 deletions
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8
sys/src/9/port/sysproc.c
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@ -379,6 +379,8 @@ sysexec(ulong *arg)
charp += n;
}
free(file0);
file0 = nil; /* so waserror() won't free file0 */
USED(file0);
free(up->text);
up->text = elem;
@ -458,13 +460,13 @@ sysexec(ulong *arg)
*/
s = up->seg[ESEG];
up->seg[ESEG] = 0;
s->base = USTKTOP-USTKSIZE;
s->top = USTKTOP;
relocateseg(s, USTKTOP-TSTKTOP);
up->seg[SSEG] = s;
qunlock(&up->seglock);
poperror(); /* seglock */
poperror(); /* elem */
s->base = USTKTOP-USTKSIZE;
s->top = USTKTOP;
relocateseg(s, USTKTOP-TSTKTOP);
/*
* '/' processes are higher priority (hack to make /ip more responsive).