1 files changed, 6 insertions, 1 deletions

diff --git a/fs/coredump.c b/fs/coredump.c
index e3ad709a4232..0b2528fb640e 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -73,10 +73,15 @@ static int expand_corename(struct core_name *cn, int size)
 static int cn_vprintf(struct core_name *cn, const char *fmt, va_list arg)
 {
         int free, need;
+        va_list arg_copy;
 
 again:
         free = cn->size - cn->used;
-        need = vsnprintf(cn->corename + cn->used, free, fmt, arg);
+
+        va_copy(arg_copy, arg);
+        need = vsnprintf(cn->corename + cn->used, free, fmt, arg_copy);
+        va_end(arg_copy);
+
         if (need < free) {
                 cn->used += need;
                 return 0;