On Wed, Sep 04, 2024 at 12:17:37PM +0300, Dan Carpenter wrote: > We back ported these two commits: > > 801ebf1043ae ("ALSA: usb-audio: Sanity checks for each pipe and EP types"). That commit is not in 4.19.y, it only is in the 5.2.8 and 5.3 releases. > fcc2cc1f3561 ("USB: move snd_usb_pipe_sanity_check into the USB core") Same here, not in 4.19.y, it's only in the 5.4.282 and 5.10 releases. > However, some chunks were accidentally dropped. Backport those chunks as > well. Perhaps those commits were never applied to 4.19.y and you should just backport them instead? :) thanks, greg k-h