• Liu Bo's avatar
    Btrfs: fix crash of btrfs_release_extent_buffer_page · 81465028
    Liu Bo authored
    This is actually inspired by Filipe's patch.  When write_one_eb() fails on
    submit_extent_page(), it'll give up writing this eb and mark it with
    EXTENT_BUFFER_IOERR.  So if it's not the last page that encounter the failure,
    there are some left pages which remain DIRTY, and if a later COW on this eb
    happens, ie. eb is COWed and freed, it'd run into BUG_ON in
    btrfs_release_extent_buffer_page() for the DIRTY page, ie. BUG_ON(PageDirty(page));
    
    This adds the missing clear_page_dirty_for_io() for the rest pages of eb.
    Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
    Reviewed-by: default avatarFilipe Manana <fdmanana@suse.com>
    Signed-off-by: default avatarChris Mason <clm@fb.com>
    81465028
extent_io.c 137 KB