1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/exec.c b/kernel/exec.c
index 8a2d1dc..0e8762f 100644
--- a/kernel/exec.c
+++ b/kernel/exec.c
@@ -67,8 +67,10 @@ exec(char *path, char **argv)
   // Allocate two pages at the next page boundary.
   // Use the second as the user stack.
   sz = PGROUNDUP(sz);
-  if((sz = uvmalloc(pagetable, sz, sz + 2*PGSIZE)) == 0)
+  uint64 sz1;
+  if((sz1 = uvmalloc(pagetable, sz, sz + 2*PGSIZE)) == 0)
     goto bad;
+  sz = sz1;
   uvmclear(pagetable, sz-2*PGSIZE);
   sp = sz;
   stackbase = sp - PGSIZE;