diff options
| author | Andrew Morton <akpm@osdl.org> | 2006-06-28 04:26:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-28 14:59:02 -0700 |
| commit | a052b68b1e7a31f1e6a721290035e9deb0f6fed9 (patch) | |
| tree | cb7ea2ae023d22a49bb609afc74238b21d2e5983 | |
| parent | 79bc79b07c9c6f8ae9290704e9e503a9327fcbb2 (diff) | |
| download | linux-a052b68b1e7a31f1e6a721290035e9deb0f6fed9.tar.bz2 | |
[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>
| -rw-r--r-- | arch/i386/kernel/irq.c | 6 | ||||
| -rw-r--r-- | arch/x86_64/kernel/irq.c | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c index c703bc7b0880..9eec9435318e 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? */ diff --git a/arch/x86_64/kernel/irq.c b/arch/x86_64/kernel/irq.c index 3be0a7e4bf08..bfa82f52a5cc 100644 --- a/arch/x86_64/kernel/irq.c +++ b/arch/x86_64/kernel/irq.c @@ -118,6 +118,12 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs) /* high bit used in ret_from_ code */ unsigned irq = ~regs->orig_rax; + if (unlikely(irq >= NR_IRQS)) { + printk(KERN_EMERG "%s: cannot handle IRQ %d\n", + __FUNCTION__, irq); + BUG(); + } + exit_idle(); irq_enter(); #ifdef CONFIG_DEBUG_STACKOVERFLOW |