memmove(dst, src, 0) leads to overflow in while(n-- > 0) as n is uint64 (thanks

Matúš Jókay <matus.jokay@stuba.sk>)
2021-09-01 07:29:12 -04:00 · 2021-09-01 07:29:12 -04:00 · 8ca56e9e0b
parent bf4816c9c6
commit 8ca56e9e0b
1 changed files with 3 additions and 0 deletions
--- a/kernel/string.c
+++ b/kernel/string.c
@ -33,6 +33,9 @@ memmove(void *dst, const void *src, uint n)
  const char *s;
  char *d;

+  if(n == 0)
+    return dst;
+  
  s = src;
  d = dst;
  if(s < d && s + n > d){