1. 09 Jun, 2008 1 commit
    • Linus Torvalds's avatar
      Fix invalid access errors in blk_lookup_devt · d5791d13
      Linus Torvalds authored
      Commit 30f2f0eb ("block: do_mounts -
      accept root=<non-existant partition>") extended blk_lookup_devt() to be
      able to look up partitions that had not yet been registered, but in the
      process made the assumption that the '&block_class.devices' list only
      contains disk devices and that you can do 'dev_to_disk(dev)' on them.
      
      That isn't actually true.  The block_class device list also contains the
      partitions we've discovered so far, and you can't just do a
      'dev_to_disk()' on those.
      
      So make sure to only work on devices that block/genhd.c has registered
      itself, something we can test by checking the 'dev->type' member.  This
      makes the loop in blk_lookup_devt() match the other such loops in this
      file.
      
      [ We may want to do an alternate version that knows to handle _either_
        whole-disk devices or partitions, but for now this is the minimal fix
        for a series of crashes reported by Mariusz Kozlowski in
      
      	http://lkml.org/lkml/2008/5/25/25
      
        and Ingo in
      
      	http://lkml.org/lkml/2008/6/9/39
      
       ]
      Reported-by: default avatarMariusz Kozlowski <m.kozlowski@tuxland.pl>
      Reported-by: default avatarIngo Molnar <mingo@elte.hu>
      Cc: Neil Brown <neilb@suse.de>
      Cc: Joao Luis Meloni Assirati <assirati@nonada.if.usp.br>
      Acked-by: default avatarKay Sievers <kay.sievers@vrfy.org>
      Cc: Greg Kroah-Hartman <gregkh@suse.de>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      d5791d13
  2. 08 Jun, 2008 1 commit
  3. 06 Jun, 2008 38 commits