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ext4: fix unit mismatch in ext4_mb_new_blocks_simple

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[ Upstream commit 497885f72d ]

The "i" returned from mb_find_next_zero_bit is in cluster unit and we
need offset "block" corresponding to "i" in block unit. Convert "i" to
block unit to fix the unit mismatch.

Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://lore.kernel.org/r/20230603150327.3596033-3-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Stable-dep-of: 3f4830abd2 ("ext4: fix potential unnitialized variable")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Kemeng Shi 2023-06-03 23:03:10 +08:00 committed by Greg Kroah-Hartman
parent 0d82a01cfa
commit 227a4fa4a0
1 changed files with 4 additions and 2 deletions
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6
fs/ext4/mballoc.c
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@ -5874,6 +5874,7 @@ static ext4_fsblk_t ext4_mb_new_blocks_simple(handle_t *handle,
{
struct buffer_head *bitmap_bh;
struct super_block *sb = ar->inode->i_sb;
struct ext4_sb_info *sbi = EXT4_SB(sb);
ext4_group_t group;
ext4_grpblk_t blkoff;
ext4_grpblk_t max = EXT4_CLUSTERS_PER_GROUP(sb);
@ -5902,7 +5903,8 @@ static ext4_fsblk_t ext4_mb_new_blocks_simple(handle_t *handle,
if (i >= max)
break;
if (ext4_fc_replay_check_excluded(sb,
ext4_group_first_block_no(sb, group) + i)) {
ext4_group_first_block_no(sb, group) +
EXT4_C2B(sbi, i))) {
blkoff = i + 1;
} else
break;
@ -5919,7 +5921,7 @@ static ext4_fsblk_t ext4_mb_new_blocks_simple(handle_t *handle,
return 0;
}
block = ext4_group_first_block_no(sb, group) + i;
block = ext4_group_first_block_no(sb, group) + EXT4_C2B(sbi, i);
ext4_mb_mark_bb(sb, block, 1, 1);
ar->len = 1;