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Set errno to ENOMEM on overflow in sbrk (bug 18592)

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This commit is contained in:
Cyril Hrubis
2015-05-20 13:50:00 +02:00
committed by Andreas Schwab
parent 6471190491
commit c13e078308
2 changed files with 14 additions and 4 deletions
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13
misc/sbrk.c
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@ -47,10 +47,15 @@ __sbrk (intptr_t increment)
return __curbrk;
oldbrk = __curbrk;
if ((increment > 0
? ((uintptr_t) oldbrk + (uintptr_t) increment < (uintptr_t) oldbrk)
: ((uintptr_t) oldbrk < (uintptr_t) -increment))
|| __brk (oldbrk + increment) < 0)
if (increment > 0
? ((uintptr_t) oldbrk + (uintptr_t) increment < (uintptr_t) oldbrk)
: ((uintptr_t) oldbrk < (uintptr_t) -increment))
{
__set_errno (ENOMEM);
return (void *) -1;
}
if (__brk (oldbrk + increment) < 0)
return (void *) -1;
return oldbrk;