x86, ioapic: Use snrpintf while set names for IO-APIC resourses

We should be ready that one day MAX_IO_APICS may raise its
number. To prevent memory overwrite we're to use safe
snprintf while set IO-APIC resourse name.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <20091108155431.GC25940@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 9ee1c1628c1723a9d1d2d8ec58cec78c350a0aff..24d1458a1822cc40bee94a52522799cdb5ffc75b 100644 (file)
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -4066,7 +4066,7 @@ static struct resource * __init ioapic_setup_resources(int nr_ioapics)
        for (i = 0; i < nr_ioapics; i++) {
                res[i].name = mem;
                res[i].flags = IORESOURCE_MEM | IORESOURCE_BUSY;
-               sprintf(mem,  "IOAPIC %u", i);
+               snprintf(mem, IOAPIC_RESOURCE_NAME_SIZE, "IOAPIC %u", i);
                mem += IOAPIC_RESOURCE_NAME_SIZE;
        }