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authorJan Kara <jack@suse.cz>2020-09-22 12:20:14 +0200
committerJan Kara <jack@suse.cz>2020-09-22 12:20:14 +0200
commita7be300de800e755714c71103ae4a0d205e41e99 (patch)
tree86cf561ebc30616f8049efb93408454eea74211e /fs/udf
parentudf: Remove redundant initialization of variable ret (diff)
downloadlinux-a7be300de800e755714c71103ae4a0d205e41e99.tar.xz
linux-a7be300de800e755714c71103ae4a0d205e41e99.zip
udf: Fix memory leak when mounting
udf_process_sequence() allocates temporary array for processing partition descriptors on volume which it fails to free. Free the array when it is not needed anymore. Fixes: 7b78fd02fb19 ("udf: Fix handling of Partition Descriptors") CC: stable@vger.kernel.org Reported-by: syzbot+128f4dd6e796c98b3760@syzkaller.appspotmail.com Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
-rw-r--r--fs/udf/super.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 8b381456482d..a76025de6710 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -1690,7 +1690,8 @@ 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;
@@ -1710,7 +1711,8 @@ 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)
@@ -1732,28 +1734,31 @@ 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;
}
/*