• Liu Bo's avatar
    Btrfs: fix crash on endio of reading corrupted block · 38c1c2e4
    Liu Bo authored
    The crash is
    
    ------------[ cut here ]------------
    kernel BUG at fs/btrfs/extent_io.c:2124!
    [...]
    Workqueue: btrfs-endio normal_work_helper [btrfs]
    RIP: 0010:[<ffffffffa02d6055>]  [<ffffffffa02d6055>] end_bio_extent_readpage+0xb45/0xcd0 [btrfs]
    
    This is in fact a regression.
    
    It is because we forgot to increase @offset properly in reading corrupted block,
    so that the @offset remains, and this leads to checksum errors while reading
    left blocks queued up in the same bio, and then ends up with hiting the above
    BUG_ON.
    Reported-by: default avatarChris Murphy <lists@colorremedies.com>
    Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
    Signed-off-by: default avatarChris Mason <clm@fb.com>
    38c1c2e4
extent_io.c 135 KB