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Date: Thu, 3 Aug 2006 18:35:45 -0700
From: "Siddha, Suresh B" <suresh.b.siddha@...el.com>
To: akpm@...l.org
Cc: alan@...rguk.ukuu.org.uk, linux-kernel@...r.kernel.org
Subject: [Patch] 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: Suresh Siddha <suresh.b.siddha@...el.com>
--- linux-2.6.18-rc3/net/core/utils.c~ 2006-08-03 14:50:28.341080424 -0700
+++ linux-2.6.18-rc3/net/core/utils.c 2006-08-03 14:50:51.222601904 -0700
@@ -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;
}
-
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