@@ -501,6 +501,7 @@ static void async_completed(struct urb *urb)
as->status = urb->status;
signr = as->signr;
if (signr) {
+ memset(&sinfo, 0, sizeof(sinfo));
sinfo.si_signo = as->signr;
sinfo.si_errno = as->status;
sinfo.si_code = SI_ASYNCIO;
@@ -2227,6 +2228,7 @@ static void usbdev_remove(struct usb_device *udev)
wake_up_all(&ps->wait);
list_del_init(&ps->list);
if (ps->discsignr) {
+ memset(&sinfo, 0, sizeof(sinfo));
sinfo.si_signo = ps->discsignr;
sinfo.si_errno = EPIPE;
sinfo.si_code = SI_ASYNCIO;
This is a note to let you know that I have just added a patch titled USB: usbfs: don't leak kernel data in siginfo to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.13.y-queue This patch is scheduled to be released in version 3.13.11-ckt19. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.13.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From 4f8d427c0979c106ca7bab50d39f6b412e70f62b Mon Sep 17 00:00:00 2001 From: Alan Stern <stern@rowland.harvard.edu> Date: Fri, 13 Feb 2015 10:54:53 -0500 Subject: USB: usbfs: don't leak kernel data in siginfo commit f0c2b68198589249afd2b1f2c4e8de8c03e19c16 upstream. When a signal is delivered, the information in the siginfo structure is copied to userspace. Good security practice dicatates that the unused fields in this structure should be initialized to 0 so that random kernel stack data isn't exposed to the user. This patch adds such an initialization to the two places where usbfs raises signals. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-by: Dave Mielke <dave@mielke.cc> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/usb/core/devio.c | 2 ++ 1 file changed, 2 insertions(+) -- 1.9.1