ext4: iterate over buffer heads correctly in move_extent_per_page()
In commitbcff24887d
("ext4: don't read blocks from disk after extents being swapped") bh is not updated correctly in the for loop and wrong data has been written to disk. generic/324 catches this on sub-page block size ext4. Fixes:bcff24887d
("ext4: don't read blocks from disk after extentsbeing swapped") Signed-off-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
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@ -390,6 +390,7 @@ data_copy:
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*err = ext4_get_block(orig_inode, orig_blk_offset + i, bh, 0);
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if (*err < 0)
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break;
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bh = bh->b_this_page;
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}
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if (!*err)
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*err = block_commit_write(pagep[0], from, from + replaced_size);
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