On Tue 22-09-20 11:45:31, Peilin Ye wrote: > udf_process_sequence() is leaking memory. Free `data.part_descs_loc` > before returning. > > Cc: sta...@vger.kernel.org > Fixes: 7b78fd02fb19 ("udf: Fix handling of Partition Descriptors") > Reported-and-tested-by: syzbot+128f4dd6e796c98b3...@syzkaller.appspotmail.com > Link: > https://syzkaller.appspot.com/bug?id=c5ec4e6f5d818f3c4afd4d59342468eec08a38da > Signed-off-by: Peilin Ye <yepeilin...@gmail.com>
Thanks for the patch but I've just yesterday written exactly the same patch and merged it to my tree... Honza > --- > fs/udf/super.c | 20 +++++++++++++------- > 1 file changed, 13 insertions(+), 7 deletions(-) > > diff --git a/fs/udf/super.c b/fs/udf/super.c > index 1c42f544096d..b0d862ab3024 100644 > --- a/fs/udf/super.c > +++ b/fs/udf/super.c > @@ -1698,7 +1698,8 @@ static noinline int udf_process_sequence( > "Pointers (max %u supported)\n", > UDF_MAX_TD_NESTING); > brelse(bh); > - return -EIO; > + ret = -EIO; > + goto out; > } > > vdp = (struct volDescPtr *)bh->b_data; > @@ -1718,7 +1719,8 @@ static noinline int udf_process_sequence( > curr = get_volume_descriptor_record(ident, bh, &data); > if (IS_ERR(curr)) { > brelse(bh); > - return PTR_ERR(curr); > + ret = PTR_ERR(curr); > + goto out; > } > /* Descriptor we don't care about? */ > if (!curr) > @@ -1740,28 +1742,32 @@ static noinline int udf_process_sequence( > */ > if (!data.vds[VDS_POS_PRIMARY_VOL_DESC].block) { > udf_err(sb, "Primary Volume Descriptor not found!\n"); > - return -EAGAIN; > + ret = -EAGAIN; > + goto out; > } > ret = udf_load_pvoldesc(sb, data.vds[VDS_POS_PRIMARY_VOL_DESC].block); > if (ret < 0) > - return ret; > + goto out; > > if (data.vds[VDS_POS_LOGICAL_VOL_DESC].block) { > ret = udf_load_logicalvol(sb, > data.vds[VDS_POS_LOGICAL_VOL_DESC].block, > fileset); > if (ret < 0) > - return ret; > + goto out; > } > > /* Now handle prevailing Partition Descriptors */ > for (i = 0; i < data.num_part_descs; i++) { > ret = udf_load_partdesc(sb, data.part_descs_loc[i].rec.block); > if (ret < 0) > - return ret; > + goto out; > } > > - return 0; > + ret = 0; > +out: > + kfree(data.part_descs_loc); > + return ret; > } > > /* > -- > 2.25.1 > -- Jan Kara <j...@suse.com> SUSE Labs, CR