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-rw-r--r--net/socket.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/net/socket.c b/net/socket.c
index 49917a1cac7..41e8847508a 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2098,12 +2098,17 @@ SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
unsigned long a[6];
unsigned long a0, a1;
int err;
+ unsigned int len;
if (call < 1 || call > SYS_ACCEPT4)
return -EINVAL;
+ len = nargs[call];
+ if (len > sizeof(a))
+ return -EINVAL;
+
/* copy_from_user should be SMP safe. */
- if (copy_from_user(a, args, nargs[call]))
+ if (copy_from_user(a, args, len))
return -EFAULT;
audit_socketcall(nargs[call] / sizeof(unsigned long), a);