Messages in this thread | | | Date | Mon, 15 Feb 2010 17:04:35 +0300 | From | Dan Carpenter <> | Subject | Re: bug list: range checking issues |
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On Mon, Feb 15, 2010 at 03:47:24PM +0200, Alexey Dobriyan wrote: > On Mon, Feb 15, 2010 at 03:40:56PM +0300, Dan Carpenter wrote: > > kernel/pid_namespace.c +96 create_pid_namespace(26) warn: buffer overflow 'ns->pidmap' 1 <= 1 > > What overflows exactly here?
It's a false positive:
smatch thinks the array ns->pidmap[] has ARRAY_SIZE() of 1 and i is 1.
kernel/pid_namespace.c 95 for (i = 1; i < PIDMAP_ENTRIES; i++) 96 atomic_set(&ns->pidmap[i].nr_free, BITS_PER_PAGE);
On my .config PIDMAP_ENTRIES is 0 so that line is never reached.
regards, dan carpenter
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