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authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>2011-01-05 12:48:13 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2011-01-05 12:47:31 +0100
commitc03017544e3b2e60aa3c8ae451fac01595f1bf11 (patch)
tree4321b487b2c6826aa2c6f6247696d86001b96082 /arch
parentf602be639e97024a77062368e123008c94b3109a (diff)
[S390] cio: fix ccwgroup unregistration race condition
A race condition exists in the ccwgroup device unregistration code which can cause a kernel panic due to a use-after-free bug. This race condition might be triggered when all ccw devices associated with a ccwgroup device are removed at the same time (e.g. because the corresponding channel path becomes no longer available). Fix this race condition by clearing the references from the associated ccw devices to the ccw group device during unregistration of the ccw group device. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch')
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