Integer signedness error in NetBSD 4.0, 5.0, and NetBSD-current before
2010-01-21 allows local users to cause a denial of service (kernel
panic) via a negative mixer index number being passed to (1) the
azalia_query_devinfo function in the azalia audio driver
(src/sys/dev/pci/azalia.c) or (2) the hdaudio_afg_query_devinfo
function in the hdaudio audio driver
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