On Thu, Jul 02, 2015 at 10:19:34AM +0200, Dick Snippe wrote: > Hello, > > I'm sorry to bother you with this, but lwn.net reported a rather serious > security issue a couple of weeks ago: > > http://lwn.net/Articles/646590/ > https://bugzilla.redhat.com/show_bug.cgi?id=1202855 > CVE-2015-1805 > "It was found that the Linux kernel's implementation of vectored pipe > read and write functionality did not take into account the I/O vectors > that were already processed when retrying after a failed atomic access > operation, potentially resulting in memory corruption due to an I/O > vector array overrun. A local, unprivileged user could use this flaw to > crash the system or, potentially, escalate their privileges on the > system." > > It appears that these upstream fixes haven't made it to 3.14.4[456]: > > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f0d1bec9d58d4c038d0ac958c9af82be6eb18045 > http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=637b58c2887e5e57850865839cc75f59184b23d1 > > I'm just a (very happy!) user of the -longterm kernels, so I don't > know how this normally works. But it would appear that this bug still > exists in the -longterm kernels. I think, and I might be wrong here, but because 637b58c2887e5e57850865839cc75f59184b23d1 (switch pipe_read() to copy_page_to_iter()) is not in the 3.14-stable tree (it showed up in 3.15), that f0d1bec9d58d4c038d0ac958c9af82be6eb18045 (new helper: copy_page_from_iter()) isn't needed (it showed up in 3.16). So is this a problem in the 3.14-stable tree? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html