From 25d61578daae697c4a0eb817f42a868af9824f82 Mon Sep 17 00:00:00 2001 From: John Keller Date: Thu, 10 May 2007 22:42:44 -0700 Subject: [IA64] SN: validate smp_affinity mask on intr redirect On SN, only allow one bit to be set in the smp_affinty mask when redirecting an interrupt. Currently setting multiple bits is allowed, but only the first bit is used in determining the CPU to redirect to. This has caused confusion among some customers. [akpm@linux-foundation.org: fixes] Signed-off-by: John Keller Signed-off-by: Andrew Morton Signed-off-by: Tony Luck --- kernel/irq/proc.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'kernel') diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c index ddde0ef9ccd..b4f1674fca7 100644 --- a/kernel/irq/proc.c +++ b/kernel/irq/proc.c @@ -27,6 +27,10 @@ static int irq_affinity_read_proc(char *page, char **start, off_t off, return len; } +#ifndef is_affinity_mask_valid +#define is_affinity_mask_valid(val) 1 +#endif + int no_irq_affinity; static int irq_affinity_write_proc(struct file *file, const char __user *buffer, unsigned long count, void *data) @@ -42,6 +46,9 @@ static int irq_affinity_write_proc(struct file *file, const char __user *buffer, if (err) return err; + if (!is_affinity_mask_valid(new_value)) + return -EINVAL; + /* * Do not allow disabling IRQs completely - it's a too easy * way to make the system unusable accidentally :-) At least -- cgit v1.2.3-18-g5258