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correct check for segment overlap (rmiller)

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This commit is contained in:
cinap_lenrek 2016-05-16 21:10:08 +02:00
parent b15430979d
commit 29c7ca80c9
1 changed files with 2 additions and 3 deletions
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5
sys/src/9/port/segment.c
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@ -427,7 +427,7 @@ ibrk(uintptr addr, int seg)
ns = up->seg[i];
if(ns == nil || ns == s)
continue;
if(newtop >= ns->base && newtop < ns->top) {
if(newtop > ns->base && s->base < ns->top) {
qunlock(s);
error(Esoverlap);
}
@ -544,8 +544,7 @@ isoverlap(uintptr va, uintptr len)
ns = up->seg[i];
if(ns == nil)
continue;
if((newtop > ns->base && newtop <= ns->top) ||
(va >= ns->base && va < ns->top))
if(newtop > ns->base && va < ns->top)
return ns;
}
return nil;