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• bp->last == bp->endp is allowed 

• do the realloc properly
This commit is contained in:
tg 2008-11-12 05:27:01 +00:00
parent 4b456b1457
commit 1211cf79cc
1 changed files with 4 additions and 2 deletions
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6
aalloc.c
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@ -1,6 +1,6 @@
#include "sh.h"
__RCSID("$MirOS: src/bin/mksh/aalloc.c,v 1.4 2008/11/12 05:11:05 tg Exp $");
__RCSID("$MirOS: src/bin/mksh/aalloc.c,v 1.5 2008/11/12 05:27:01 tg Exp $");
/* mksh integration of aalloc */
@ -224,7 +224,7 @@ check_bp(PArea ap, const char *funcname, TCookie ocookie)
funcname, bp, bp->endp);
return (NULL);
}
if ((bp->last < (char *)&bp->storage) || (bp->last >= bp->endp)) {
if ((bp->last < (char *)&bp->storage) || (bp->last > bp->endp)) {
AALLOC_WARN("%s: block %p last pointer out of bounds: "
"%p < %p < %p", funcname, bp, &bp->storage, bp->last,
bp->endp);
@ -354,6 +354,8 @@ alloc(size_t nmemb, size_t size, PArea ap)
bsz = bp->endp - (char *)bp;
safe_muladd((size_t)2, bsz, 0);
safe_realloc(bp, bsz);
bp->last = (char *)bp + (bsz / 2);
bp->endp = (char *)bp + bsz;
/* “bp” has possibly changed, enter its new value into ap */
ap->bp.pv = (char *)bp;