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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1789435
Title:
kernel 3.13.0-157+158: ext4: wrong error message »invalid block
bitmap«
Status in linux package in Ubuntu:
Incomplete
Bug description:
W're getting the »invalid block bitmap« error since kernel 3.13.0-157
see
https://github.com/torvalds/linux/commit/22be37acce25d66ecf6403fc8f44df9c5ded2372
and in this diff the error is within
»if (offset < 0 || EXT4_B2C(sbi, offset) >= sb->s_blocksize ||«
Kind regards, J. Barth
*** linux_3.13.0-155.205.diff 2018-08-28 14:56:04.357521118 +0200
--- linux_3.13.0-157.207.diff 2018-08-28 14:48:27.168863046 +0200
***************
*** 31,37 ****
}
/* Return the number of free blocks in a block group. It is used when
! @@ -419,11 +420,15 @@
}
ext4_lock_group(sb, block_group);
if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
--- 31,102 ----
}
/* Return the number of free blocks in a block group. It is used when
! @@ -307,6 +308,7 @@
! ext4_group_t block_group,
! struct buffer_head *bh)
! {
! + struct ext4_sb_info *sbi = EXT4_SB(sb);
! ext4_grpblk_t offset;
! ext4_grpblk_t next_zero_bit;
! ext4_fsblk_t blk;
! @@ -326,24 +328,30 @@
! /* check whether block bitmap block number is set */
! blk = ext4_block_bitmap(sb, desc);
! offset = blk - group_first_block;
! - if (!ext4_test_bit(offset, bh->b_data))
! + if (offset < 0 || EXT4_B2C(sbi, offset) >= sb->s_blocksize ||
! + !ext4_test_bit(EXT4_B2C(sbi, offset), bh->b_data))
! /* bad block bitmap */
! return blk;
!
! /* check whether the inode bitmap block number is set */
! blk = ext4_inode_bitmap(sb, desc);
! offset = blk - group_first_block;
! - if (!ext4_test_bit(offset, bh->b_data))
! + if (offset < 0 || EXT4_B2C(sbi, offset) >= sb->s_blocksize ||
! + !ext4_test_bit(EXT4_B2C(sbi, offset), bh->b_data))
! /* bad block bitmap */
! return blk;
!
! /* check whether the inode table block number is set */
! blk = ext4_inode_table(sb, desc);
! offset = blk - group_first_block;
! + if (offset < 0 || EXT4_B2C(sbi, offset) >= sb->s_blocksize ||
! + EXT4_B2C(sbi, offset + sbi->s_itb_per_group) >= sb->s_blocksize)
! + return blk;
! next_zero_bit = ext4_find_next_zero_bit(bh->b_data,
! - offset + EXT4_SB(sb)->s_itb_per_group,
! - offset);
! - if (next_zero_bit < offset + EXT4_SB(sb)->s_itb_per_group)
! + EXT4_B2C(sbi, offset + EXT4_SB(sb)->s_itb_per_group),
! + EXT4_B2C(sbi, offset));
! + if (next_zero_bit <
! + EXT4_B2C(sbi, offset + EXT4_SB(sb)->s_itb_per_group))
! /* bad bitmap for inode tables */
! return blk;
! return 0;
! @@ -394,6 +402,7 @@
! ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t
block_group)
! {
! struct ext4_group_desc *desc;
! + struct ext4_sb_info *sbi = EXT4_SB(sb);
! struct buffer_head *bh;
! ext4_fsblk_t bitmap_blk;
!
! @@ -401,6 +410,12 @@
! if (!desc)
! return NULL;
! bitmap_blk = ext4_block_bitmap(sb, desc);
! + if ((bitmap_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) ||
! + (bitmap_blk >= ext4_blocks_count(sbi->s_es))) {
! + ext4_error(sb, "Invalid block bitmap block %llu in "
! + "block_group %u", bitmap_blk, block_group);
! + return ERR_PTR(-EIO);
! + }
! bh = sb_getblk(sb, bitmap_blk);
! if (unlikely(!bh)) {
! ext4_error(sb, "Cannot get buffer for block bitmap - "
! @@ -419,11 +434,15 @@
}
ext4_lock_group(sb, block_group);
if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
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