Messages in this thread | | | Date | Thu, 7 Nov 2019 08:15:45 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH] IB/qib: Validate ->show()/store() callbacks before calling them |
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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@linaro.org> > --- > drivers/infiniband/hw/qib/qib_sysfs.c | 6 ++++++ > 1 file changed, 6 insertions(+) >
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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