X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=arch%2Fia64%2Fsn%2Fkernel%2Fsn2%2Fsn2_smp.c;h=e585f9a2afb936c74f9ec0ceea13beb1ef7271c4;hb=8097110d179b874d91c6495330c2b96c991e8c6e;hp=49d3120415eb740154a5469be144e51598775d04;hpb=867a89e0b73af48838c7987e80899a1ff26dd6ff;p=linux-2.6-omap-h63xx.git

diff --git a/arch/ia64/sn/kernel/sn2/sn2_smp.c b/arch/ia64/sn/kernel/sn2/sn2_smp.c
index 49d3120415e..e585f9a2afb 100644
--- a/arch/ia64/sn/kernel/sn2/sn2_smp.c
+++ b/arch/ia64/sn/kernel/sn2/sn2_smp.c
@@ -512,6 +512,8 @@ static ssize_t sn2_ptc_proc_write(struct file *file, const char __user *user, si
 	int cpu;
 	char optstr[64];
 
+	if (count == 0 || count > sizeof(optstr))
+		return -EINVAL;
 	if (copy_from_user(optstr, user, count))
 		return -EFAULT;
 	optstr[count - 1] = '\0';