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Commit ee974e01 authored by David Howells's avatar David Howells Committed by Ingo Molnar
Browse files

clocksource: check range 



Check that the value being passed to parse_pmtmr() does not exceed the
limits of pmtmr_ioport.

Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 6a55617e

drivers/clocksource/acpi_pm.c

+5 −2
Original line number Diff line number Diff line
@@ -226,9 +226,12 @@ static int __init parse_pmtmr(char *arg) 


	if (strict_strtoul(arg, 16, &base))

		return -EINVAL;



#ifdef CONFIG_X86_64

	if (base > UINT_MAX)

		return -ERANGE;

#endif

	printk(KERN_INFO "PMTMR IOPort override: 0x%04x -> 0x%04lx\n",

	       (unsigned int)pmtmr_ioport, base);

	       pmtmr_ioport, base);

	pmtmr_ioport = base;



	return 1;