ext4: avoid drop reference to iloc.bh twice
The reference to iloc.bh has been dropped in ext4_mark_iloc_dirty. However, the reference is dropped again if error occurs during ext4_handle_dirty_metadata, which may result in use-after-free bugs. Fixes: fb265c9c("ext4: add ext4_sb_bread() to disambiguate ENOMEM cases") Signed-off-by:Pan Bian <bianpan2016@163.com> Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Reviewed-by:
Jan Kara <jack@suse.cz> Cc: stable@kernel.org
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