On Mon, Sep 04, 2017 at 02:37:05PM +0100, Colin King wrote: > From: Colin Ian King <colin.king@xxxxxxxxxxxxx> > > resp.reserved has not been initialized and so the copy_to_user (via > ib_copy_to_udata) is copying uninitialized data from the stack back > to user space which is a potential information leak. Fix this by > initializing all of resp to zero. Reserved field is not copied as the length of reserved is subtracted from the size of resp and passed to ib_copy_to_udata. if (ib_copy_to_udata(udata, &resp, sizeof resp - sizeof resp.reserved)) { This patch is not necessary. Chien