Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-11 06:31:49 +00:00
Code Issues Packages Projects Releases Wiki Activity

udf: Fix memory leak when mounting

Browse Source 
When we are mounting filesystem, we can load one partition table before
finding out that we cannot complete processing of logical volume descriptor
and trying the reserve descriptor. Free the table properly before trying
the reserve descriptor.

Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2012-06-27 22:27:05 +02:00
parent e124a32043
commit bff943af6f
1 changed files with 64 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

122
fs/udf/super.c
View File

@ -252,6 +252,63 @@ static int udf_sb_alloc_partition_maps(struct super_block *sb, u32 count)
return 0;
}
static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
{
int i;
int nr_groups = bitmap->s_nr_groups;
int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
nr_groups);
for (i = 0; i < nr_groups; i++)
if (bitmap->s_block_bitmap[i])
brelse(bitmap->s_block_bitmap[i]);
if (size <= PAGE_SIZE)
kfree(bitmap);
else
vfree(bitmap);
}
static void udf_free_partition(struct udf_part_map *map)
{
int i;
struct udf_meta_data *mdata;
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
iput(map->s_uspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
iput(map->s_fspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
udf_sb_free_bitmap(map->s_uspace.s_bitmap);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
udf_sb_free_bitmap(map->s_fspace.s_bitmap);
if (map->s_partition_type == UDF_SPARABLE_MAP15)
for (i = 0; i < 4; i++)
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
else if (map->s_partition_type == UDF_METADATA_MAP25) {
mdata = &map->s_type_specific.s_metadata;
iput(mdata->s_metadata_fe);
mdata->s_metadata_fe = NULL;
iput(mdata->s_mirror_fe);
mdata->s_mirror_fe = NULL;
iput(mdata->s_bitmap_fe);
mdata->s_bitmap_fe = NULL;
}
}
static void udf_sb_free_partitions(struct super_block *sb)
{
struct udf_sb_info *sbi = UDF_SB(sb);
int i;
for (i = 0; i < sbi->s_partitions; i++)
udf_free_partition(&sbi->s_partmaps[i]);
kfree(sbi->s_partmaps);
sbi->s_partmaps = NULL;
}
static int udf_show_options(struct seq_file *seq, struct dentry *root)
{
struct super_block *sb = root->d_sb;
@ -1596,7 +1653,11 @@ static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
/* responsible for finding the PartitionDesc(s) */
if (!udf_process_sequence(sb, main_s, main_e, fileset))
return 1;
return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
udf_sb_free_partitions(sb);
if (!udf_process_sequence(sb, reserve_s, reserve_e, fileset))
return 1;
udf_sb_free_partitions(sb);
return 0;
}
/*
@ -1861,55 +1922,8 @@ u64 lvid_get_unique_id(struct super_block *sb)
return ret;
}
static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
{
int i;
int nr_groups = bitmap->s_nr_groups;
int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
nr_groups);
for (i = 0; i < nr_groups; i++)
if (bitmap->s_block_bitmap[i])
brelse(bitmap->s_block_bitmap[i]);
if (size <= PAGE_SIZE)
kfree(bitmap);
else
vfree(bitmap);
}
static void udf_free_partition(struct udf_part_map *map)
{
int i;
struct udf_meta_data *mdata;
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE)
iput(map->s_uspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE)
iput(map->s_fspace.s_table);
if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP)
udf_sb_free_bitmap(map->s_uspace.s_bitmap);
if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP)
udf_sb_free_bitmap(map->s_fspace.s_bitmap);
if (map->s_partition_type == UDF_SPARABLE_MAP15)
for (i = 0; i < 4; i++)
brelse(map->s_type_specific.s_sparing.s_spar_map[i]);
else if (map->s_partition_type == UDF_METADATA_MAP25) {
mdata = &map->s_type_specific.s_metadata;
iput(mdata->s_metadata_fe);
mdata->s_metadata_fe = NULL;
iput(mdata->s_mirror_fe);
mdata->s_mirror_fe = NULL;
iput(mdata->s_bitmap_fe);
mdata->s_bitmap_fe = NULL;
}
}
static int udf_fill_super(struct super_block *sb, void *options, int silent)
{
int i;
int ret;
struct inode *inode = NULL;
struct udf_options uopt;
@ -2071,9 +2085,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
error_out:
if (sbi->s_vat_inode)
iput(sbi->s_vat_inode);
if (sbi->s_partitions)
for (i = 0; i < sbi->s_partitions; i++)
udf_free_partition(&sbi->s_partmaps[i]);
#ifdef CONFIG_UDF_NLS
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
unload_nls(sbi->s_nls_map);
@ -2081,8 +2092,7 @@ error_out:
if (!(sb->s_flags & MS_RDONLY))
udf_close_lvid(sb);
brelse(sbi->s_lvid_bh);
kfree(sbi->s_partmaps);
udf_sb_free_partitions(sb);
kfree(sbi);
sb->s_fs_info = NULL;
@ -2123,16 +2133,12 @@ void _udf_warn(struct super_block *sb, const char *function,
static void udf_put_super(struct super_block *sb)
{
int i;
struct udf_sb_info *sbi;
sbi = UDF_SB(sb);
if (sbi->s_vat_inode)
iput(sbi->s_vat_inode);
if (sbi->s_partitions)
for (i = 0; i < sbi->s_partitions; i++)
udf_free_partition(&sbi->s_partmaps[i]);
#ifdef CONFIG_UDF_NLS
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
unload_nls(sbi->s_nls_map);
@ -2140,7 +2146,7 @@ static void udf_put_super(struct super_block *sb)
if (!(sb->s_flags & MS_RDONLY))
udf_close_lvid(sb);
brelse(sbi->s_lvid_bh);
kfree(sbi->s_partmaps);
udf_sb_free_partitions(sb);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
}