commit 90bab90832d1f3863d8345bcc2a2e5f59c270af8
parent f3685aa391431d5eafbc918e1d143dd731c64787
Author: rsc <rsc>
Date: Sun, 31 May 2009 02:11:27 +0000
exec sanity check
Diffstat:
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/exec.c b/exec.c
@@ -62,7 +62,7 @@ exec(char *path, char **argv)
goto bad;
if(ph.type != ELF_PROG_LOAD)
continue;
- if(ph.va + ph.memsz > sz)
+ if(ph.va + ph.memsz < ph.va || ph.va + ph.memsz > sz || ph.memsz < ph.filesz)
goto bad;
if(readi(ip, mem + ph.va, ph.offset, ph.filesz) != ph.filesz)
goto bad;