From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> Date: Wed, 14 Jun 2017 13:55:20 +0200 > Robert O'Callahan reported that since struct iwreq is smaller than > struct ifreq, if it happens to land at the end of a mapped section > userspace will erroneously get -EFAULT. > > Bug report is https://bugzilla.kernel.org/show_bug.cgi?id=195869. > > This bug is ancient, it kernel 2.1.15 was the first to contain the > bug, and was released almost exactly 20.5 years ago. > > Dave, I don't know if we should even bother sending this to stable, > but if so, the third patch will apply by itself but not compile, a > smaller patch consist of only the net/core/dev_ioctl.c modifications > with a cast thrown in where the compile fails/warns due to passing > the wrong struct type. > > Should I merge this through my tree? Agreed that -stable is probably not appropriate, and yes feel free to merge it via your tree. 20.5 years... makes me feel old :-)
