uml: fix request->sector update

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It is theoretically possible for a request to finish and be freed between
writing it to the I/O thread and updating the sector count.  In this case, the
update will dereference a freed pointer.

To avoid this, I delay the update until processing the next sg segment, when
the request pointer is known to be good.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Jeff Dike 2007-07-15 23:38:47 -07:00 • committed by Linus Torvalds

parent 7ff9057db7

commit 0a6d3a2a38

1 changed files with 4 additions and 2 deletions

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6

arch/um/drivers/ubd_kern.c

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