malloc: Check for integer overflow in memalign.

A large bytes parameter to memalign could cause an integer overflow
and corrupt allocator internals. Check the overflow does not occur
before continuing with the allocation.

ChangeLog:

2013-09-11  Will Newton  <will.newton@linaro.org>

	[BZ #15857]
	* malloc/malloc.c (__libc_memalign): Check the value of bytes
	does not overflow.

diff --git a/ChangeLog b/ChangeLog
index 2c9dc89a5b86b82adf544eb603b40572a676ff51..14760a24ee26daea98c89c162194ee4339a98a28 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -335,6 +335,12 @@
        * malloc/malloc.c (__libc_valloc): Check the value of bytes
        does not overflow.
 
+2013-09-11  Will Newton  <will.newton@linaro.org>
+
+       [BZ #15857]
+       * malloc/malloc.c (__libc_memalign): Check the value of bytes
+       does not overflow.
+
 2013-09-11  Will Newton  <will.newton@linaro.org>
 
        [BZ #15856]