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authorAndrew Morton <akpm@osdl.org>2006-06-28 04:26:43 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-28 14:59:02 -0700
commita052b68b1e7a31f1e6a721290035e9deb0f6fed9 (patch)
treecb7ea2ae023d22a49bb609afc74238b21d2e5983 /arch/i386
parent79bc79b07c9c6f8ae9290704e9e503a9327fcbb2 (diff)
[PATCH] x86: do_IRQ(): check irq number
We recently changed x86 to handle more than 256 IRQs. Add a check in do_IRQ() just to make sure that nothing went wrong with that implementation. [chrisw@sous-sol.org: do x86_64 too] Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@muc.de> Cc: Chris Wright <chrisw@sous-sol.org> Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com> Cc: <Christian.Limpach@cl.cam.ac.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
-rw-r--r--arch/i386/kernel/irq.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c
index c703bc7b088..9eec9435318 100644
--- a/arch/i386/kernel/irq.c
+++ b/arch/i386/kernel/irq.c
@@ -60,6 +60,12 @@ fastcall unsigned int do_IRQ(struct pt_regs *regs)
u32 *isp;
#endif
+ if (unlikely((unsigned)irq >= NR_IRQS)) {
+ printk(KERN_EMERG "%s: cannot handle IRQ %d\n",
+ __FUNCTION__, irq);
+ BUG();
+ }
+
irq_enter();
#ifdef CONFIG_DEBUG_STACKOVERFLOW
/* Debugging check for stack overflow: is there less than 1KB free? */