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Fix ixallocx_prof() to check for size greater than HUGE_MAXCLASS.

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Jason Evans 2015-09-15 00:49:09 -07:00
parent 0108b1fd04
commit 8c485b02a6
2 changed files with 6 additions and 3 deletions
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6
src/jemalloc.c
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@ -2286,8 +2286,12 @@ ixallocx_prof(tsd_t *tsd, void *ptr, size_t old_usize, size_t size,
prof_active = prof_active_get_unlocked();
old_tctx = prof_tctx_get(ptr);
/* Clamp extra if necessary to avoid (size + extra) overflow. */
if (unlikely(size + extra > HUGE_MAXCLASS))
if (unlikely(size + extra > HUGE_MAXCLASS)) {
/* Check for size overflow. */
if (size > HUGE_MAXCLASS)
return (old_usize);
extra = HUGE_MAXCLASS - size;
}
/*
* usize isn't knowable before ixalloc() returns when extra is non-zero.
* Therefore, compute its maximum possible value and use that in