On Sat 05-12-15 18:05:42, Quentin Casasnovas wrote:
> Vegard and I found that when a directory on isofs is corrupted, we are not
> releasing the associated buffer_head, leading to a memory leak. This was
> introduced by:
>
> 2deb1acc653c ("isofs: fix access to unallocated memory when reading
> corrupted filesystem")
>
> This was found by fuzzing.
Good catch. Thanks! You can add:
Reviewed-by: Jan Kara <[email protected]>
Honza
> Cc: <[email protected]>
> Cc: Jan Kara <[email protected]>
> Fixes: 2deb1acc653c ("isofs: fix access to unallocated memory when
> reading...")
> Signed-off-by: Quentin Casasnovas <[email protected]>
> Signed-off-by: Vegard Nossum <[email protected]>
> Tested-by: Vegard Nossum <[email protected]>
> ---
> fs/isofs/dir.c | 1 +
> fs/isofs/namei.c | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/fs/isofs/dir.c b/fs/isofs/dir.c
> index b943cbd..2e7d74c 100644
> --- a/fs/isofs/dir.c
> +++ b/fs/isofs/dir.c
> @@ -151,6 +151,7 @@ static int do_isofs_readdir(struct inode *inode, struct
> file *file,
> printk(KERN_NOTICE "iso9660: Corrupted directory entry"
> " in block %lu of inode %lu\n", block,
> inode->i_ino);
> + brelse(bh);
> return -EIO;
> }
>
> diff --git a/fs/isofs/namei.c b/fs/isofs/namei.c
> index 7b543e6..696f255 100644
> --- a/fs/isofs/namei.c
> +++ b/fs/isofs/namei.c
> @@ -101,6 +101,7 @@ isofs_find_entry(struct inode *dir, struct dentry *dentry,
> printk(KERN_NOTICE "iso9660: Corrupted directory entry"
> " in block %lu of inode %lu\n", block,
> dir->i_ino);
> + brelse(bh);
> return 0;
> }
>
> --
> 2.4.9
>
--
Jan Kara <[email protected]>
SUSE Labs, CR
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