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Diffstat (limited to 'arch/s390/lib/uaccess_mvcos.c')
-rw-r--r--arch/s390/lib/uaccess_mvcos.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/lib/uaccess_mvcos.c b/arch/s390/lib/uaccess_mvcos.c
index 7f3eb3d56024..1829742bf479 100644
--- a/arch/s390/lib/uaccess_mvcos.c
+++ b/arch/s390/lib/uaccess_mvcos.c
@@ -184,6 +184,8 @@ static size_t strncpy_from_user_mvcos(size_t count, const char __user *src,
{
size_t done, len, offset, len_str;
+ if (unlikely(!count))
+ return 0;
done = 0;
do {
offset = (size_t)src & ~PAGE_MASK;