From: Benoit Parrot <bparrot@ti.com>
To: Hans Verkuil <hverkuil@xs4all.nl>
Cc: <linux-media@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, Benoit Parrot <bparrot@ti.com>
Subject: [Patch v3 08/21] media: ti-vpe: vpe: fix a v4l2-compliance failure causing a kernel panic
Date: Mon, 7 Oct 2019 10:09:56 -0500 [thread overview]
Message-ID: <20191007151009.22095-9-bparrot@ti.com> (raw)
In-Reply-To: <20191007151009.22095-1-bparrot@ti.com>
v4l2-compliance fails with this message:
warn: v4l2-test-formats.cpp(717): \
TRY_FMT cannot handle an invalid pixelformat.
test VIDIOC_TRY_FMT: FAIL
This causes the following kernel panic:
Unable to handle kernel paging request at virtual address 56595561
pgd = ecd80e00
*pgd=00000000
Internal error: Oops: 205 [#1] PREEMPT SMP ARM
...
CPU: 0 PID: 930 Comm: v4l2-compliance Not tainted \
4.14.62-01715-gc8cd67f49a19 #1
Hardware name: Generic DRA72X (Flattened Device Tree)
task: ece44d80 task.stack: ecc6e000
PC is at __vpe_try_fmt+0x18c/0x2a8 [ti_vpe]
LR is at 0x8
Because the driver fails to properly check the 'num_planes' values for
proper ranges it ends up accessing out of bound data causing the kernel
panic.
Since this driver only handle single or dual plane pixel format, make
sure the provided value does not exceed 2 planes.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
---
drivers/media/platform/ti-vpe/vpe.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index bbbf11174e16..1278d457f753 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -1650,7 +1650,7 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f,
&pix->height, MIN_H, MAX_H, H_ALIGN,
S_ALIGN);
- if (!pix->num_planes)
+ if (!pix->num_planes || pix->num_planes > 2)
pix->num_planes = fmt->coplanar ? 2 : 1;
else if (pix->num_planes > 1 && !fmt->coplanar)
pix->num_planes = 1;
--
2.17.1
next prev parent reply other threads:[~2019-10-07 15:07 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-07 15:09 [Patch v3 00/21] media: vpe: maintenance Benoit Parrot
2019-10-07 15:09 ` [Patch v3 01/21] media: ti-vpe: Fix a parallel build issue Benoit Parrot
2019-10-07 15:09 ` [Patch v3 02/21] media: ti-vpe: vpe: Fix Motion Vector vpdma stride Benoit Parrot
2019-10-07 15:09 ` [Patch v3 03/21] media: ti-vpe: vpe: Add missing null pointer checks Benoit Parrot
2019-10-07 15:09 ` [Patch v3 04/21] media: ti-vpe: vpe: Remove unnecessary use of container_of Benoit Parrot
2019-10-07 15:09 ` [Patch v3 05/21] media: ti-vpe: Add support for SEQ_BT Benoit Parrot
2019-10-07 15:09 ` [Patch v3 06/21] media: ti-vpe: Add support for NV21 format Benoit Parrot
2019-10-07 15:09 ` [Patch v3 07/21] media: ti-vpe: Set MAX height supported to 2048 pixels Benoit Parrot
2019-10-07 15:09 ` Benoit Parrot [this message]
2019-10-07 15:09 ` [Patch v3 09/21] media: ti-vpe: vpe: fix a v4l2-compliance warning about invalid pixel format Benoit Parrot
2019-10-07 15:09 ` [Patch v3 10/21] media: ti-vpe: vpe: Make sure YUYV is set as default format Benoit Parrot
2019-10-07 15:09 ` [Patch v3 11/21] media: ti-vpe: vpe: fix a v4l2-compliance failure about invalid sizeimage Benoit Parrot
2019-10-07 15:10 ` [Patch v3 12/21] media: ti-vpe: vpe: fix a v4l2-compliance failure about frame sequence number Benoit Parrot
2019-10-07 15:10 ` [Patch v3 13/21] media: ti-vpe: vpe: ensure buffers are cleaned up properly in abort cases Benoit Parrot
2019-10-07 15:10 ` [Patch v3 14/21] media: ti-vpe: vpdma: Use fixed type for address in descriptor Benoit Parrot
2019-10-07 15:10 ` [Patch v3 15/21] media: ti-vpe: Set the DMA mask and coherent mask Benoit Parrot
2019-10-07 15:10 ` [Patch v3 16/21] media: ti-vpe: vpe: use standard struct instead of duplicating fields Benoit Parrot
2019-10-07 15:10 ` [Patch v3 17/21] media: ti-vpe: vpe: fix v4l2_compliance issue related to xfer_func Benoit Parrot
2019-10-07 15:10 ` [Patch v3 18/21] media: ti-vpe: csc: rgb-to-yuv HD full range coeff are wrong Benoit Parrot
2019-10-07 15:10 ` [Patch v3 19/21] media: v4l2-common: add pixel encoding support Benoit Parrot
2019-10-07 15:10 ` [Patch v3 20/21] media: v4l2-common: add RGB565 and RGB55 to v4l2_format_info Benoit Parrot
2019-10-07 15:10 ` [Patch v3 21/21] media: ti-vpe: vpe: don't rely on colorspace member for conversion Benoit Parrot
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