On Thu, Nov 07, 2019 at 08:50:25AM +0530, Viresh Kumar wrote: > The permissions of the read-only or write-only sysfs files can be > changed (as root) and the user can then try to read a write-only file or > write to a read-only file which will lead to kernel crash here. > > Protect against that by always validating the show/store callbacks. > > Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx> > --- > drivers/infiniband/hw/qib/qib_sysfs.c | 6 ++++++ > 1 file changed, 6 insertions(+) > Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
