Wilco Dijkstra 54ba8bcd42 Fix tcache count maximum (BZ #24531) ...

The tcache counts[] array is a char, which has a very small range and thus
may overflow.  When setting tcache_count tunable, there is no overflow check.
However the tunable must not be larger than the maximum value of the tcache
counts[] array, otherwise it can overflow when filling the tcache.

	[BZ #24531]
	* malloc/malloc.c (MAX_TCACHE_COUNT): New define.
	(do_set_tcache_count): Only update if count is small enough.
	* manual/tunables.texi (glibc.malloc.tcache_count): Document max value.

(cherry picked from commit 5ad533e8e65092be962e414e0417112c65d154fb)

2019-05-22 15:00:49 +01:00

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Depend

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Makefile

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malloc.c

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malloc.h

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mallocbug.c

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tst-malloc-usable-static-tunables.c

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tst-malloc-usable-static.c

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malloc: tcache double free check

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tst-tcfree3.c

malloc: Add another test for tcache double free check.

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Versions

Implement allocation buffers for internal use

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