media: v4l: async: Fix NULL pointer dereference in adding ancillary links

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[ Upstream commit 9b4667ea67 ]

In v4l2_async_create_ancillary_links(), ancillary links are created for
lens and flash sub-devices. These are sub-device to sub-device links and
if the async notifier is related to a V4L2 device, the source sub-device
of the ancillary link is NULL, leading to a NULL pointer dereference.
Check the notifier's sd field is non-NULL in
v4l2_async_create_ancillary_links().

Fixes: aa4faf6eb2 ("media: v4l2-async: Create links during v4l2_async_match_notify()")
Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
[Sakari Ailus: Reword the subject and commit messages slightly.]
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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ChiYuan Huang 2024-05-08 10:51:49 +08:00 • committed by Greg Kroah-Hartman

parent b3b9de49e1

commit fe0f92fd53

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drivers/media/v4l2-core/v4l2-async.c

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