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media: v4l: async: Fix notifier list entry init
struct v4l2_async_notifier has several list_head members, but only
waiting_list and done_list are initialized. notifier_entry was kept
'zeroed' leading to an uninitialized list_head.
This results in a NULL-pointer dereference if csi2_async_register() fails,
e.g. node for remote endpoint is disabled, and returns -ENOTCONN.
The following calls to v4l2_async_nf_unregister() results in a NULL
pointer dereference.
Add the missing list head initializer.
Fixes: b8ec754ae4
("media: v4l: async: Set v4l2_device and subdev in async notifier init")
Cc: <stable@vger.kernel.org> # for 6.6 and later
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
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1 changed files with 2 additions and 0 deletions
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@ -563,6 +563,7 @@ void v4l2_async_nf_init(struct v4l2_async_notifier *notifier,
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{
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INIT_LIST_HEAD(¬ifier->waiting_list);
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INIT_LIST_HEAD(¬ifier->done_list);
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INIT_LIST_HEAD(¬ifier->notifier_entry);
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notifier->v4l2_dev = v4l2_dev;
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}
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EXPORT_SYMBOL(v4l2_async_nf_init);
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@ -572,6 +573,7 @@ void v4l2_async_subdev_nf_init(struct v4l2_async_notifier *notifier,
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{
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INIT_LIST_HEAD(¬ifier->waiting_list);
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INIT_LIST_HEAD(¬ifier->done_list);
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INIT_LIST_HEAD(¬ifier->notifier_entry);
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notifier->sd = sd;
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}
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EXPORT_SYMBOL_GPL(v4l2_async_subdev_nf_init);
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