4.4-stable patches

added patches:
	media-technisat-usb2-break-out-of-loop-at-end-of-buffer.patch

diff --git a/queue-4.4/media-technisat-usb2-break-out-of-loop-at-end-of-buffer.patch b/queue-4.4/media-technisat-usb2-break-out-of-loop-at-end-of-buffer.patch
new file mode 100644 (file)
index 0000000..551c8ce
--- /dev/null
+++ b/queue-4.4/media-technisat-usb2-break-out-of-loop-at-end-of-buffer.patch
@@ -0,0 +1,71 @@
+From 0c4df39e504bf925ab666132ac3c98d6cbbe380b Mon Sep 17 00:00:00 2001
+From: Sean Young <sean@mess.org>
+Date: Wed, 3 Jul 2019 10:52:39 -0400
+Subject: media: technisat-usb2: break out of loop at end of buffer
+
+From: Sean Young <sean@mess.org>
+
+commit 0c4df39e504bf925ab666132ac3c98d6cbbe380b upstream.
+
+Ensure we do not access the buffer beyond the end if no 0xff byte
+is encountered.
+
+Reported-by: syzbot+eaaaf38a95427be88f4b@syzkaller.appspotmail.com
+Signed-off-by: Sean Young <sean@mess.org>
+Reviewed-by: Kees Cook <keescook@chromium.org>
+Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ drivers/media/usb/dvb-usb/technisat-usb2.c |   21 ++++++++++-----------
+ 1 file changed, 10 insertions(+), 11 deletions(-)
+
+--- a/drivers/media/usb/dvb-usb/technisat-usb2.c
++++ b/drivers/media/usb/dvb-usb/technisat-usb2.c
+@@ -594,9 +594,9 @@ static int technisat_usb2_frontend_attac
+ 
+ static int technisat_usb2_get_ir(struct dvb_usb_device *d)
+ {
+-      u8 buf[62], *b;
+-      int ret;
++      u8 buf[62];
+       struct ir_raw_event ev;
++      int i, ret;
+ 
+       buf[0] = GET_IR_DATA_VENDOR_REQUEST;
+       buf[1] = 0x08;
+@@ -632,26 +632,25 @@ unlock:
+               return 0; /* no key pressed */
+ 
+       /* decoding */
+-      b = buf+1;
+ 
+ #if 0
+       deb_rc("RC: %d ", ret);
+-      debug_dump(b, ret, deb_rc);
++      debug_dump(buf + 1, ret, deb_rc);
+ #endif
+ 
+       ev.pulse = 0;
+-      while (1) {
+-              ev.pulse = !ev.pulse;
+-              ev.duration = (*b * FIRMWARE_CLOCK_DIVISOR * FIRMWARE_CLOCK_TICK) / 1000;
+-              ir_raw_event_store(d->rc_dev, &ev);
+-
+-              b++;
+-              if (*b == 0xff) {
++      for (i = 1; i < ARRAY_SIZE(buf); i++) {
++              if (buf[i] == 0xff) {
+                       ev.pulse = 0;
+                       ev.duration = 888888*2;
+                       ir_raw_event_store(d->rc_dev, &ev);
+                       break;
+               }
++
++              ev.pulse = !ev.pulse;
++              ev.duration = (buf[i] * FIRMWARE_CLOCK_DIVISOR *
++                             FIRMWARE_CLOCK_TICK) / 1000;
++              ir_raw_event_store(d->rc_dev, &ev);
+       }
+ 
+       ir_raw_event_handle(d->rc_dev);

diff --git a/queue-4.4/series b/queue-4.4/series
index bf4e718fcc21b113d72ed770526ac495758593ed..bdbee9fe205e5d9ff8a8a019dd8dfef3b5e9c043 100644 (file)
--- a/queue-4.4/series
+++ b/queue-4.4/series
@@ -52,3 +52,4 @@ net-seeq-fix-the-function-used-to-release-some-memor.patch
 dmaengine-ti-omap-dma-add-cleanup-in-omap_dma_probe.patch
 keys-fix-missing-null-pointer-check-in-request_key_a.patch
 floppy-fix-usercopy-direction.patch
+media-technisat-usb2-break-out-of-loop-at-end-of-buffer.patch