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-rw-r--r--net/core/scm.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/net/core/scm.c b/net/core/scm.c
index 072d5742440a..66eaee783e8b 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -273,7 +273,9 @@ int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data)
check_object_size(data, cmlen - sizeof(*cm), true);
- if (!user_write_access_begin(cm, cmlen))
+ if (can_do_masked_user_access())
+ cm = masked_user_access_begin(cm);
+ else if (!user_write_access_begin(cm, cmlen))
goto efault;
unsafe_put_user(cmlen, &cm->cmsg_len, efault_end);