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Commit 85575112 authored by Suresh Siddha's avatar Suresh Siddha Committed by David S. Miller
Browse files

[NET]: Fix potential stack overflow in net/core/utils.c 



On High end systems (1024 or so cpus) this can potentially cause stack
overflow.  Fix the stack usage.

Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7ea49ed7

net/core/utils.c

+4 −3
Original line number Diff line number Diff line
@@ -130,12 +130,13 @@ void __init net_random_init(void) 
static int net_random_reseed(void)

{

	int i;

	unsigned long seed[NR_CPUS];

	unsigned long seed;



	get_random_bytes(seed, sizeof(seed));

	for_each_possible_cpu(i) {

		struct nrnd_state *state = &per_cpu(net_rand_state,i);

		__net_srandom(state, seed[i]);



		get_random_bytes(&seed, sizeof(seed));

		__net_srandom(state, seed);

	}

	return 0;

}