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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-04 12:09:39 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-07 08:56:50 -0700 |
| commit | 8792953929b01e82e57bce07cc717a0bf24384bc (patch) | |
| tree | a3466b047caff23610fbf0cd5b858aa21138dc22 /fs | |
| parent | 7bfac470b517b18d496e96acc90be58353df2159 (diff) | |
| download | lwn-8792953929b01e82e57bce07cc717a0bf24384bc.tar.gz lwn-8792953929b01e82e57bce07cc717a0bf24384bc.zip | |
hfsplus: Fix potential buffer overflows
commit 6f24f892871acc47b40dd594c63606a17c714f77 upstream.
Commit ec81aecb2966 ("hfs: fix a potential buffer overflow") fixed a few
potential buffer overflows in the hfs filesystem. But as Timo Warns
pointed out, these changes also need to be made on the hfsplus
filesystem as well.
Reported-by: Timo Warns <warns@pre-sense.de>
Acked-by: WANG Cong <amwang@redhat.com>
Cc: Alexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Miklos Szeredi <mszeredi@suse.cz>
Cc: Sage Weil <sage@newdream.net>
Cc: Eugene Teo <eteo@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Dave Anderson <anderson@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/hfsplus/catalog.c | 4 | ||||
| -rw-r--r-- | fs/hfsplus/dir.c | 11 |
2 files changed, 15 insertions, 0 deletions
diff --git a/fs/hfsplus/catalog.c b/fs/hfsplus/catalog.c index b4ba1b319333..408073ae7a27 100644 --- a/fs/hfsplus/catalog.c +++ b/fs/hfsplus/catalog.c @@ -360,6 +360,10 @@ int hfsplus_rename_cat(u32 cnid, err = hfs_brec_find(&src_fd); if (err) goto out; + if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) { + err = -EIO; + goto out; + } hfs_bnode_read(src_fd.bnode, &entry, src_fd.entryoffset, src_fd.entrylength); diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c index 4df5059c25da..159f5ebf519a 100644 --- a/fs/hfsplus/dir.c +++ b/fs/hfsplus/dir.c @@ -146,6 +146,11 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir) filp->f_pos++; /* fall through */ case 1: + if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) { + err = -EIO; + goto out; + } + hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength); if (be16_to_cpu(entry.type) != HFSPLUS_FOLDER_THREAD) { @@ -177,6 +182,12 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir) err = -EIO; goto out; } + + if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) { + err = -EIO; + goto out; + } + hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength); type = be16_to_cpu(entry.type); |