summaryrefslogtreecommitdiff
path: root/exec.c
diff options
context:
space:
mode:
Diffstat (limited to 'exec.c')
-rw-r--r--exec.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/exec.c b/exec.c
index 8dbbdb6..e5d1816 100644
--- a/exec.c
+++ b/exec.c
@@ -46,6 +46,8 @@ exec(char *path, char **argv)
goto bad;
if((sz = allocuvm(pgdir, sz, ph.vaddr + ph.memsz)) == 0)
goto bad;
+ if(ph.vaddr % PGSIZE != 0)
+ goto bad;
if(loaduvm(pgdir, (char*)ph.vaddr, ip, ph.off, ph.filesz) < 0)
goto bad;
}