• NeilBrown's avatar
    md: Don't read past end of bitmap when reading bitmap. · a2ed9615
    NeilBrown authored
    When we read the write-intent-bitmap off the device, we currently
    read a whole number of pages.
    When PAGE_SIZE is 4K, this works due to the alignment we enforce
    on the superblock and bitmap.
    When PAGE_SIZE is 64K, this case read past the end-of-device
    which causes an error.
    
    When we write the superblock, we ensure to clip the last page
    to just be the required size.  Copy that code into the read path
    to just read the required number of sectors.
    Signed-off-by: default avatarNeil Brown <neilb@suse.de>
    Cc: stable@kernel.org
    a2ed9615
bitmap.c 43.2 KB