[U-Boot] [PATCH] malloc: Fix issue with calloc memory possibly being non-zero

Wolfgang Denk wd at denx.de
Mon Nov 15 23:06:36 CET 2010


Dear Kumar Gala,

In message <1289854274-7006-1-git-send-email-galak at kernel.crashing.org> you wrote:
> Since we set #define MORECORE_CLEARS 1, the code assumes 'sbrk' always
> returns zero'd out memory.  However since its possible that free()
> returns memory ack to sbrk() via malloc_trim we could possible get
> non-zero'd memory from sbrk() if it allocates back memory that was
> previously freed to it.

I confirm that the test case works fine here, too.  So:

Tested-by: Wolfgang Denk <wd at denx.de>


But the commit message needs serious rework before this can get
applied.

Best regards,

Wolfgang Denk

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