Hi 09.05.2015, 03:52, "David Fries" <[email protected]>: > A temperature conversion can take 750 ms and when possible the > w1_therm slave driver drops the bus_mutex to allow other bus > operations, but that includes operations such as a periodic slave > search, which can remove this slave when it is no longer detected. > If that happens the sl->family_data will be freed and set to NULL > causing w1_slave_show to crash when it wakes up. > > Signed-off-by: David Fries <[email protected]> > Reported-By: Thorsten Bschorr <[email protected]> > Tested-by: Thorsten Bschorr <[email protected]> > Acked-by: Evgeniy Polyakov <[email protected]> > --- > This should be applied to the stable series as well. In the name of > full disclosure, this just narrows the race window, from crashing in > normal operation on the reporters system to no longer crashing with > multiple readers and another process hammering on inserting/removing > the slave device.
Greg, please pull it upstream -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
