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-rw-r--r--fs/splice.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/splice.c b/fs/splice.c
index 02c39ae719b6..2aa8f5ab1c49 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1234,6 +1234,9 @@ static int copy_from_user_mmap_sem(void *dst, const void __user *src, size_t n)
{
int partial;
+ if (!access_ok(VERIFY_READ, src, n))
+ return -EFAULT;
+
pagefault_disable();
partial = __copy_from_user_inatomic(dst, src, n);
pagefault_enable();
@@ -1442,6 +1445,11 @@ static long vmsplice_to_user(struct file *file, const struct iovec __user *iov,
break;
}
+ if (unlikely(!access_ok(VERIFY_WRITE, base, len))) {
+ error = -EFAULT;
+ break;
+ }
+
sd.len = 0;
sd.total_len = len;
sd.flags = flags;