On Fri 06-01-17 21:54:43, Fabian Frederick wrote:
> We were checking block number without checking partition.
> sbi->s_partmaps[iloc->partitionReferenceNum] could lead to
> bad memory access. See udf_nfs_get_inode() path for instance.
>
> Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
Thanks. Applied.
Honza
> ---
> fs/udf/inode.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/fs/udf/inode.c b/fs/udf/inode.c
> index 47638eb..3926973 100644
> --- a/fs/udf/inode.c
> +++ b/fs/udf/inode.c
> @@ -1276,6 +1276,12 @@ static int udf_read_inode(struct inode *inode, bool hidden_inode)
> int ret = -EIO;
>
> reread:
> + if (iloc->partitionReferenceNum >= sbi->s_partitions) {
> + udf_debug("partition reference: %d > logical volume partitions: %d\n",
> + iloc->partitionReferenceNum, sbi->s_partitions);
> + return -EIO;
> + }
> +
> if (iloc->logicalBlockNum >=
> sbi->s_partmaps[iloc->partitionReferenceNum].s_partition_len) {
> udf_debug("block=%d, partition=%d out of range\n",
> --
> 2.7.4
>
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
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