diff options
| author | Eric Sesterhenn <snakebyte@gmx.de> | 2008-10-15 22:04:11 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-11-13 09:56:06 -0800 |
| commit | 3c050502c4166dc12009f35eb41fabe9c900cd43 (patch) | |
| tree | 42f1ae5c82539ea57817b36d0e2f8426092783cb | |
| parent | 5995f4d7e9419b62432eeb3a6dfa4c164d2def7e (diff) | |
hfs: fix namelength memory corruption (CVE-2008-5025)
commit d38b7aa7fc3371b52d036748028db50b585ade2e upstream
Fix a stack corruption caused by a corrupted hfs filesystem. If the
catalog name length is corrupted the memcpy overwrites the catalog btree
structure. Since the field is limited to HFS_NAMELEN bytes in the
structure and the file format, we throw an error if it is too long.
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | fs/hfs/catalog.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/hfs/catalog.c b/fs/hfs/catalog.c index ba851576ebb1..6d98f116ca03 100644 --- a/fs/hfs/catalog.c +++ b/fs/hfs/catalog.c @@ -190,6 +190,10 @@ int hfs_cat_find_brec(struct super_block *sb, u32 cnid, fd->search_key->cat.ParID = rec.thread.ParID; len = fd->search_key->cat.CName.len = rec.thread.CName.len; + if (len > HFS_NAMELEN) { + printk(KERN_ERR "hfs: bad catalog namelength\n"); + return -EIO; + } memcpy(fd->search_key->cat.CName.name, rec.thread.CName.name, len); return hfs_brec_find(fd); } |