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Fix out-of-bound in per_cpu in spl_random_init

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When iterating per_cpu values, we need to use for_each_possible_cpu. While
NR_CPUS indicates the number of CPU supported by the kernel, it might not
initialize all of them if the kernel decides it's not possible to use them.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #578
This commit is contained in:
tuxoko 2016-10-07 20:59:46 -07:00 committed by Brian Behlendorf
parent 2529b3a80e
commit 0d26756665
1 changed files with 1 additions and 1 deletions
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2
module/spl/spl-generic.c
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@ -638,7 +638,7 @@ spl_random_init(void)
"0x%016llx%016llx.", cpu_to_be64(s[0]), cpu_to_be64(s[1]));
}
for (i = 0; i < NR_CPUS; i++) {
for_each_possible_cpu(i) {
uint64_t *wordp = per_cpu(spl_pseudo_entropy, i);
spl_rand_jump(s);