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  1. 08 6月, 2005 2 次提交
  3. 07 6月, 2005 1 次提交
  5. 26 5月, 2005 1 次提交
  7. 20 5月, 2005 1 次提交
  9. 19 5月, 2005 1 次提交
    • S
      [PATCH] Fix filp being passed through raw ioctl handler · e72022e1
      由 Stephen Tweedie 提交于 
      Don't pass meaningless file handles to block device ioctls.

The recent raw IO ioctl-passthrough fix started passing the raw file
handle into the block device ioctl handler.  That's unlikely to be
useful, as the file handle is actually open on a character-mode raw
device, not a block device, so dereferencing it is not going to yield
useful results to a block device ioctl handler.

Previously we just passed NULL; also not a value that can usefully
be dereferenced, but at least if it does happen, we'll oops instead of
silently pretending that the file is a block device, so NULL is the more
defensive option here.  This patch reverts to that behaviour.

Noticed by Al Viro.
Signed-off-by: NStephen Tweedie <sct@redhat.com>
Acked-by: NAl Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      e72022e1
  11. 17 5月, 2005 2 次提交
    • P
      [PATCH] Intel 6300ESB TCO timer support · a123edab
      由 Peter Lundkvist 提交于 
      Additional i8xx_tco device support.

Cc: David Hardeman <david@2gen.com>
Cc: <wim@iguana.be>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      a123edab
    • S
      [PATCH] Fix root hole in raw device · 68f66feb
      由 Stephen Tweedie 提交于 
      [Patch] Fix raw device ioctl pass-through

Raw character devices are supposed to pass ioctls through to the block
devices they are bound to.  Unfortunately, they are using the wrong
function for this: ioctl_by_bdev(), instead of blkdev_ioctl().

ioctl_by_bdev() performs a set_fs(KERNEL_DS) before calling the ioctl,
redirecting the user-space buffer access to the kernel address space.
This is, needless to say, a bad thing.

This was noticed first on s390, where raw IO was non-functioning.  The
s390 driver config does not actually allow raw IO to be enabled, which
was the first part of the problem.  Secondly, the s390 kernel address
space is distinct from user, causing legal raw ioctls to fail.  I've
reproduced this on a kernel built with 4G:4G split on x86, which fails
in the same way (-EFAULT if the address does not exist kernel-side;
returns success without actually populating the user buffer if it does.)

The patch below fixes both the config and address-space problems.  It's
based closely on a patch by Jan Glauber <jang@de.ibm.com>, which has
been tested on s390 at IBM.  I've tested it on x86 4G:4G (split address
space) and x86_64 (common address space).

Kernel-address-space access has been assigned CAN-2005-1264.
Signed-off-by: NStephen Tweedie <sct@redhat.com>
Signed-off-by: NDave Jones <davej@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
      68f66feb
  13. 06 5月, 2005 2 次提交
  15. 04 5月, 2005 5 次提交
  17. 01 5月, 2005 10 次提交
  19. 30 4月, 2005 1 次提交
  21. 26 4月, 2005 4 次提交
  23. 17 4月, 2005 6 次提交