2007-02-10 02:14:17

by Brian Behlendorf

[permalink] [raw]
Subject: e2fsprogs coverity patch <cid-12.diff>

Lawrence Livermore National Labs recently ran the source code
analysis tool Coverity over the e2fsprogs-1.39 source to see
if it would identify any significant bugs. The analysis
turned up 38 mostly minor issues which are enumerated here
with patches. We went through and resolved these issues
but would love to see these mostly minor changes reviewed
and commited upstream.

Brian Behlendorf <[email protected]>, and
Herb Wartens <[email protected]>

Coverity ID: 12: Overrun Static

Add an extra byte to EXT2_NAME_LEN in the static allocation for the
required trailing NULL. This allows filenames up to the maximum
length of EXT2_NAME_LEN withover an overrun.

Index: e2fsprogs+chaos/debugfs/dump.c
--- e2fsprogs+chaos.orig/debugfs/dump.c
+++ e2fsprogs+chaos/debugfs/dump.c
@@ -292,12 +292,12 @@ static int rdump_dirent(struct ext2_dir_
int blocksize EXT2FS_ATTR((unused)),
char *buf EXT2FS_ATTR((unused)), void *private)
- char name[EXT2_NAME_LEN];
+ char name[EXT2_NAME_LEN + 1];
int thislen;
const char *dumproot = private;
struct ext2_inode inode;

- thislen = ((dirent->name_len & 0xFF) < EXT2_NAME_LEN
+ thislen = ((dirent->name_len & 0xFF) <= EXT2_NAME_LEN
? (dirent->name_len & 0xFF) : EXT2_NAME_LEN);
strncpy(name, dirent->name, thislen);
name[thislen] = 0;