This is a note to let you know that I've just added the patch titled
media: ts2020: avoid integer overflows on 32 bit machines
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: media-ts2020-avoid-integer-overflows-on-32-bit-machines.patch and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 81742be14b6a90c9fd0ff6eb4218bdf696ad8e46 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab mchehab@s-opensource.com Date: Wed, 10 Jan 2018 07:20:39 -0500 Subject: media: ts2020: avoid integer overflows on 32 bit machines
From: Mauro Carvalho Chehab mchehab@s-opensource.com
commit 81742be14b6a90c9fd0ff6eb4218bdf696ad8e46 upstream.
Before this patch, when compiled for arm32, the signal strength were reported as:
Lock (0x1f) Signal= 4294908.66dBm C/N= 12.79dB
Because of a 32 bit integer overflow. After it, it is properly reported as:
Lock (0x1f) Signal= -58.64dBm C/N= 12.79dB
Fixes: 0f91c9d6bab9 ("[media] TS2020: Calculate tuner gain correctly") Signed-off-by: Mauro Carvalho Chehab mchehab@s-opensource.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/media/dvb-frontends/ts2020.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/media/dvb-frontends/ts2020.c +++ b/drivers/media/dvb-frontends/ts2020.c @@ -369,7 +369,7 @@ static int ts2020_read_tuner_gain(struct gain2 = clamp_t(long, gain2, 0, 13); v_agc = clamp_t(long, v_agc, 400, 1100);
- *_gain = -(gain1 * 2330 + + *_gain = -((__s64)gain1 * 2330 + gain2 * 3500 + v_agc * 24 / 10 * 10 + 10000); @@ -387,7 +387,7 @@ static int ts2020_read_tuner_gain(struct gain3 = clamp_t(long, gain3, 0, 6); v_agc = clamp_t(long, v_agc, 600, 1600);
- *_gain = -(gain1 * 2650 + + *_gain = -((__s64)gain1 * 2650 + gain2 * 3380 + gain3 * 2850 + v_agc * 176 / 100 * 10 -
Patches currently in stable-queue which might be from mchehab@s-opensource.com are
queue-4.4/media-v4l2-compat-ioctl32.c-copy-m.userptr-in-put_v4l2_plane32.patch queue-4.4/media-v4l2-compat-ioctl32.c-avoid-sizeof-type.patch queue-4.4/media-v4l2-compat-ioctl32.c-drop-pr_info-for-unknown-buffer-type.patch queue-4.4/media-soc_camera-soc_scale_crop-add-missing-module_description-author-license.patch queue-4.4/media-dvb-usb-v2-lmedm04-move-ts2020-attach-to-dm04_lme2510_tuner.patch queue-4.4/media-v4l2-compat-ioctl32.c-add-missing-vidioc_prepare_buf.patch queue-4.4/vb2-v4l2_buf_flag_done-is-set-after-dqbuf.patch queue-4.4/media-v4l2-compat-ioctl32.c-refactor-compat-ioctl32-logic.patch queue-4.4/media-v4l2-compat-ioctl32.c-fix-ctrl_is_pointer.patch queue-4.4/media-dvb-usb-v2-lmedm04-improve-logic-checking-of-warm-start.patch queue-4.4/media-v4l2-compat-ioctl32.c-move-helper-functions-to-__get-put_v4l2_format32.patch queue-4.4/media-ts2020-avoid-integer-overflows-on-32-bit-machines.patch queue-4.4/media-v4l2-compat-ioctl32.c-don-t-copy-back-the-result-for-certain-errors.patch queue-4.4/media-v4l2-compat-ioctl32.c-make-ctrl_is_pointer-work-for-subdevs.patch queue-4.4/media-v4l2-compat-ioctl32.c-fix-the-indentation.patch queue-4.4/media-v4l2-compat-ioctl32-copy-v4l2_window-global_alpha.patch queue-4.4/media-v4l2-ioctl.c-don-t-copy-back-the-result-for-enotty.patch queue-4.4/media-v4l2-compat-ioctl32.c-copy-clip-list-in-put_v4l2_window32.patch