From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Hans Verkuil <hverkuil@xs4all.nl>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
Sasha Levin <sashal@kernel.org>,
linux-media@vger.kernel.org
Subject: [PATCH AUTOSEL 5.1 044/219] media: mc-device.c: don't memset __user pointer contents
Date: Mon, 15 Jul 2019 10:00:45 -0400 [thread overview]
Message-ID: <20190715140341.6443-44-sashal@kernel.org> (raw)
In-Reply-To: <20190715140341.6443-1-sashal@kernel.org>
From: Hans Verkuil <hverkuil@xs4all.nl>
[ Upstream commit 518fa4e0e0da97ea2e17c95ab57647ce748a96e2 ]
You can't memset the contents of a __user pointer. Instead, call copy_to_user to
copy links.reserved (which is zeroed) to the user memory.
This fixes this sparse warning:
SPARSE:drivers/media/mc/mc-device.c drivers/media/mc/mc-device.c:521:16: warning: incorrect type in argument 1 (different address spaces)
Fixes: f49308878d720 ("media: media_device_enum_links32: clean a reserved field")
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/media/media-device.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
index 6893843edada..8e2a66493e62 100644
--- a/drivers/media/media-device.c
+++ b/drivers/media/media-device.c
@@ -518,8 +518,9 @@ static long media_device_enum_links32(struct media_device *mdev,
if (ret)
return ret;
- memset(ulinks->reserved, 0, sizeof(ulinks->reserved));
-
+ if (copy_to_user(ulinks->reserved, links.reserved,
+ sizeof(ulinks->reserved)))
+ return -EFAULT;
return 0;
}
--
2.20.1
next prev parent reply other threads:[~2019-07-15 14:06 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190715140341.6443-1-sashal@kernel.org>
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 019/219] media: dvb: usb: fix use after free in dvb_usb_device_exit Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 020/219] media: spi: IR LED: add missing of table registration Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 022/219] media: ov7740: avoid invalid framesize setting Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 023/219] media: marvell-ccic: fix DMA s/g desc number calculation Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 024/219] media: vpss: fix a potential NULL pointer dereference Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 025/219] media: media_device_enum_links32: clean a reserved field Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 026/219] media: venus: firmware: fix leaked of_node references Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 037/219] media: vim2m: fix two double-free issues Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 038/219] media: v4l2-core: fix use-after-free error Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 040/219] media: usb:zr364xx:Fix KASAN:null-ptr-deref Read in zr364xx_vidioc_querycap Sasha Levin
2019-07-15 14:00 ` Sasha Levin [this message]
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 045/219] media: saa7164: fix remove_proc_entry warning Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 046/219] media: staging: media: davinci_vpfe: - Fix for memory leak if decoder initialization fails Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 050/219] tua6100: Avoid build warnings Sasha Levin
2019-07-15 14:00 ` [PATCH AUTOSEL 5.1 054/219] media: wl128x: Fix some error handling in fm_v4l2_init_video_device() Sasha Levin
2019-07-15 14:01 ` [PATCH AUTOSEL 5.1 059/219] media: imx7-mipi-csis: Propagate the error if clock enabling fails Sasha Levin
2019-07-15 14:01 ` [PATCH AUTOSEL 5.1 061/219] media: aspeed: change irq to threaded irq Sasha Levin
2019-07-15 14:01 ` [PATCH AUTOSEL 5.1 075/219] media: uvcvideo: Fix access to uninitialized fields on probe error Sasha Levin
2019-07-15 14:01 ` [PATCH AUTOSEL 5.1 076/219] media: fdp1: Support M3N and E3 platforms Sasha Levin
2019-07-15 14:01 ` [PATCH AUTOSEL 5.1 082/219] media: davinci: vpif_capture: fix memory leak in vpif_probe() Sasha Levin
2019-07-15 14:01 ` [PATCH AUTOSEL 5.1 084/219] media: s5p-mfc: fix reading min scratch buffer size on MFC v6/v7 Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 126/219] media: s5p-mfc: Make additional clocks optional Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 127/219] media: i2c: fix warning same module names Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 130/219] media: mt9m111: fix fw-node refactoring Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 133/219] media: coda: fix mpeg2 sequence number handling Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 134/219] media: coda: fix last buffer handling in V4L2_ENC_CMD_STOP Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 135/219] media: coda: increment sequence offset for the last returned frame Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 136/219] media: vimc: cap: check v4l2_fill_pixfmt return value Sasha Levin
2019-07-15 14:02 ` [PATCH AUTOSEL 5.1 137/219] media: hdpvr: fix locking and a missing msleep Sasha Levin
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