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random: Fix handing of arch_get_random_long in get_random_bytes()

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If there is an architecture-specific random number generator we use
it to acquire randomness one "long" at a time. We should put these
random words into consecutive words in the result buffer - not just
overwrite the first word again and again.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/4ec4061010261a4cb0@agluck-desktop.sc.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Luck, Tony 2011-11-16 10:50:56 -08:00 committed by H. Peter Anvin
parent 78345d2edc
commit 0d2f096b87
1 changed files with 1 additions and 1 deletions
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2
drivers/char/random.c
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@ -941,7 +941,7 @@ void get_random_bytes(void *buf, int nbytes)
if (!arch_get_random_long(&v))
break;
memcpy(buf, &v, chunk);
memcpy(p, &v, chunk);
p += chunk;
nbytes -= chunk;
}