Linus Torvalds d5791d13b1 Fix invalid access errors in blk_lookup_devt ... Commit 30f2f0eb4b ("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: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Reported-by: Ingo Molnar <mingo@elte.hu> Cc: Neil Brown <neilb@suse.de> Cc: Joao Luis Meloni Assirati <assirati@nonada.if.usp.br> Acked-by: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-06-09 10:06:24 -07:00
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as-iosched.c
blk-barrier.c
blk-core.c	block: Move the second call to get_request to the end of the loop	2008-05-28 14:49:27 +02:00
blk-exec.c
blk-ioc.c	cfq-iosched: fix RCU race in the cfq io_context destructor handling	2008-05-07 09:28:57 +02:00
blk-map.c
blk-merge.c	block: get rid of likely/unlikely predictions in merge logic	2008-05-07 09:33:55 +02:00
blk-settings.c	Remove blkdev warning triggered by using md	2008-05-14 19:11:15 -07:00
blk-sysfs.c
blk-tag.c	block: adjust tagging function queue bit locking	2008-05-07 09:27:43 +02:00
blk.h
blktrace.c	block: make blktrace use per-cpu buffers for message notes	2008-05-28 14:49:27 +02:00
bsg.c
cfq-iosched.c	cfq-iosched: fix RCU problem in cfq_cic_lookup()	2008-05-28 14:49:28 +02:00
compat_ioctl.c	Fix misuses of bdevname()	2008-05-13 08:02:26 -07:00
deadline-iosched.c
elevator.c	Added in elevator switch message to blktrace stream	2008-05-28 14:49:27 +02:00
genhd.c	Fix invalid access errors in blk_lookup_devt	2008-06-09 10:06:24 -07:00
ioctl.c
Kconfig
Kconfig.iosched
Makefile
noop-iosched.c
scsi_ioctl.c