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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2014-10-29 11:45:04 +0300 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-10-29 10:34:34 -0400 |
| commit | 9f295664e2f2cdf53c596f74bcf3f644cae9fecc (patch) | |
| tree | 31e986db37787dcc9758a68fd30261bd7adebd21 /mm/percpu.c | |
| parent | cac7f2429872d3733dc3f9915857b1691da2eb2f (diff) | |
| download | lwn-9f295664e2f2cdf53c596f74bcf3f644cae9fecc.tar.gz lwn-9f295664e2f2cdf53c596f74bcf3f644cae9fecc.zip | |
percpu: off by one in BUG_ON()
The unit_map[] array has "nr_cpu_ids" number of elements. It's
allocated a few lines earlier in the function. So this test should be
>= instead of >.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/percpu.c')
| -rw-r--r-- | mm/percpu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 014bab65e0ff..d39e2f4e335c 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -1591,7 +1591,7 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai, if (cpu == NR_CPUS) continue; - PCPU_SETUP_BUG_ON(cpu > nr_cpu_ids); + PCPU_SETUP_BUG_ON(cpu >= nr_cpu_ids); PCPU_SETUP_BUG_ON(!cpu_possible(cpu)); PCPU_SETUP_BUG_ON(unit_map[cpu] != UINT_MAX); |