treewide: use get_random_u32_below() instead of deprecated function

This is a simple mechanical transformation done by:

@@
expression E;
@@
- prandom_u32_max
+ get_random_u32_below
  (E)

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs
Reviewed-by: SeongJae Park <sj@kernel.org> # for damon
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> # for arm
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 2f355f0ec32a..e74e0361fd92 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1713,7 +1713,7 @@ static int rt6_insert_exception(struct rt6_info *nrt,
 	net->ipv6.rt6_stats->fib_rt_cache++;
 
 	/* Randomize max depth to avoid some side channels attacks. */
-	max_depth = FIB6_MAX_DEPTH + prandom_u32_max(FIB6_MAX_DEPTH);
+	max_depth = FIB6_MAX_DEPTH + get_random_u32_below(FIB6_MAX_DEPTH);
 	while (bucket->depth > max_depth)
 		rt6_exception_remove_oldest(bucket);