[rds-devel] [patch] rds: fix an integer overflow test in rds_info_getsockopt()

[David Miller]

From: Dan Carpenter <dan.carpenter at oracle.com>
Date: Sat, 1 Aug 2015 15:33:26 +0300

> "len" is a signed integer.  We check that len is not negative, so it
> goes from zero to INT_MAX.  PAGE_SIZE is unsigned long so the comparison
> is type promoted to unsigned long.  ULONG_MAX - 4095 is a higher than
> INT_MAX so the condition can never be true.
> 
> I don't know if this is harmful but it seems safe to limit "len" to
> INT_MAX - 4095.
> 
> Fixes: a8c879a7ee98 ('RDS: Info and stats')
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

Applied, thanks Dan.