19 Aug
2026
19 Aug
'26
12:40 p.m.
On Wed, Aug 19, 2026 at 08:32:45PM +0800, Runyu Xiao wrote:
On Tue, Aug 18, 2026 at 20:23:10 +0200, Greg Kroah-Hartman wrote:
How was this found and tested?
Found by code inspection: gb_lights_channel_register() publishes the LED class device and its brightness callback before mutex_init(&light->channels[i].lock) runs, so a concurrent brightness update can take an uninitialized mutex.
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greg k-h