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Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/tlb_uv.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index c503b7f0448..d0fbb7712ab 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -492,7 +492,7 @@ static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user,
long newmode;
char optstr[64];
- if (count > 64)
+ if (count == 0 || count > sizeof(optstr))
return -EINVAL;
if (copy_from_user(optstr, user, count))
return -EFAULT;