4.4-stable patches

added patches:
	isdn-disable-iiocdbgvar.patch

diff --git a/queue-4.4/isdn-disable-iiocdbgvar.patch b/queue-4.4/isdn-disable-iiocdbgvar.patch
new file mode 100644 (file)
index 0000000..b5d3fd3
--- /dev/null
+++ b/queue-4.4/isdn-disable-iiocdbgvar.patch
@@ -0,0 +1,41 @@
+From foo@baz Tue Aug 21 07:37:56 CEST 2018
+From: Kees Cook <keescook@chromium.org>
+Date: Wed, 15 Aug 2018 12:14:05 -0700
+Subject: isdn: Disable IIOCDBGVAR
+
+From: Kees Cook <keescook@chromium.org>
+
+[ Upstream commit 5e22002aa8809e2efab2da95855f73f63e14a36c ]
+
+It was possible to directly leak the kernel address where the isdn_dev
+structure pointer was stored. This is a kernel ASLR bypass for anyone
+with access to the ioctl. The code had been present since the beginning
+of git history, though this shouldn't ever be needed for normal operation,
+therefore remove it.
+
+Reported-by: Al Viro <viro@zeniv.linux.org.uk>
+Cc: Karsten Keil <isdn@linux-pingi.de>
+Signed-off-by: Kees Cook <keescook@chromium.org>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/isdn/i4l/isdn_common.c |    8 +-------
+ 1 file changed, 1 insertion(+), 7 deletions(-)
+
+--- a/drivers/isdn/i4l/isdn_common.c
++++ b/drivers/isdn/i4l/isdn_common.c
+@@ -1655,13 +1655,7 @@ isdn_ioctl(struct file *file, uint cmd,
+                       } else
+                               return -EINVAL;
+               case IIOCDBGVAR:
+-                      if (arg) {
+-                              if (copy_to_user(argp, &dev, sizeof(ulong)))
+-                                      return -EFAULT;
+-                              return 0;
+-                      } else
+-                              return -EINVAL;
+-                      break;
++                      return -EINVAL;
+               default:
+                       if ((cmd & IIOCDRVCTL) == IIOCDRVCTL)
+                               cmd = ((cmd >> _IOC_NRSHIFT) & _IOC_NRMASK) & ISDN_DRVIOCTL_MASK;

diff --git a/queue-4.4/series b/queue-4.4/series
index 93074b5b3c552d5f4c83ed7866970fa1bfdb1b39..4044d93122f856d0e24b9ae2a4053ecfd46065c9 100644 (file)
--- a/queue-4.4/series
+++ b/queue-4.4/series
@@ -19,3 +19,4 @@ acpi-pm-save-nvs-memory-for-asus-1025c-laptop.patch
 serial-8250_dw-always-set-baud-rate-in-dw8250_set_termios.patch
 x86-mm-simplify-pd_page-macros.patch
 bluetooth-avoid-killing-an-already-killed-socket.patch
+isdn-disable-iiocdbgvar.patch