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Commit 8dadb198 authored by Theodore Ts'o's avatar Theodore Ts'o
Browse files

ext4: fix uninit block bitmap initialization when s_meta_first_bg is non-zero 



The number of old-style block group descriptor blocks is
s_meta_first_bg when the meta_bg feature flag is set.

Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
parent 3f8fb949

fs/ext4/balloc.c

+7 −1
Original line number Diff line number Diff line
@@ -761,7 +761,13 @@ static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb, 
static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb,

					ext4_group_t group)

{

	return ext4_bg_has_super(sb, group) ? EXT4_SB(sb)->s_gdb_count : 0;

	if (!ext4_bg_has_super(sb, group))

		return 0;



	if (EXT4_HAS_INCOMPAT_FEATURE(sb,EXT4_FEATURE_INCOMPAT_META_BG))

		return le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);

	else

		return EXT4_SB(sb)->s_gdb_count;

}



/**