This is a note to let you know that I've just added the patch titled AIO: properly check iovec sizes to the 3.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: aio-properly-check-iovec-sizes.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From greg@xxxxxxxxx Fri Feb 19 17:36:28 2016 From: Greg KH <greg@xxxxxxxxx> Date: Fri, 19 Feb 2016 17:36:21 -0800 Subject: AIO: properly check iovec sizes From: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> In Linus's tree, the iovec code has been reworked massively, but in older kernels the AIO layer should be checking this before passing the request on to other layers. Many thanks to Ben Hawkes of Google Project Zero for pointing out the issue. Reported-by: Ben Hawkes <hawkes@xxxxxxxxxx> Acked-by: Benjamin LaHaise <bcrl@xxxxxxxxx> Tested-by: Willy Tarreau <w@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/aio.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/fs/aio.c +++ b/fs/aio.c @@ -1375,11 +1375,16 @@ static ssize_t aio_setup_single_vector(s unsigned long *nr_segs, struct iovec *iovec) { - if (unlikely(!access_ok(!rw, buf, kiocb->ki_nbytes))) + size_t len = kiocb->ki_nbytes; + + if (len > MAX_RW_COUNT) + len = MAX_RW_COUNT; + + if (unlikely(!access_ok(!rw, buf, len))) return -EFAULT; iovec->iov_base = buf; - iovec->iov_len = kiocb->ki_nbytes; + iovec->iov_len = len; *nr_segs = 1; return 0; } Patches currently in stable-queue which might be from greg@xxxxxxxxx are queue-3.14/mm-memory_hotplug.c-check-for-missing-sections-in-test_pages_in_a_zone.patch queue-3.14/aio-properly-check-iovec-sizes.patch -- 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