From: Austin Clements <amdragon@mit.edu>
Date: Wed, 1 Sep 2010 04:27:12 +0000 (-0400)
Subject: Fix similar leak in copyuvm
X-Git-Url: https://git.devinivas.org/?a=commitdiff_plain;h=ba04b3e70e4f1916c777d62de53088d96b09579f;p=cs3210-lab1.git

Fix similar leak in copyuvm
---

diff --git a/vm.c b/vm.c
index 95eeca8..a60c915 100644
--- a/vm.c
+++ b/vm.c
@@ -313,13 +313,17 @@ copyuvm(pde_t *pgdir, uint sz)
     if(*pte & PTE_P){
       pa = PTE_ADDR(*pte);
       if (!(mem = kalloc()))
-        return 0;
+        goto bad;
       memmove(mem, (char *)pa, PGSIZE);
       if (!mappages(d, (void *)i, PGSIZE, PADDR(mem), PTE_W|PTE_U))
-        return 0;
+        goto bad;
     }
   }
   return d;
+
+bad:
+  freevm(d);
+  return 0;
 }
 
 // Allocate one page table for the machine for the kernel address