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-rw-r--r--runtime/copy.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/runtime/copy.c b/runtime/copy.c
index 7e28a6a6..0822902d 100644
--- a/runtime/copy.c
+++ b/runtime/copy.c
@@ -157,8 +157,10 @@ _stp_copy_from_user (char *dst, const char __user *src, unsigned long count)
if (count) {
if (access_ok(VERIFY_READ, src, count))
count = __copy_from_user_inatomic(dst, src, count);
- else
+ else {
memset(dst, 0, count);
+ count = -1;
+ }
}
return count;
}