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commit 0cdfa9e6f0915e3d243e2393bfa8a22e12d553b0 upstream. There is no validation of 'e->no_of_channels' which can trigger an out-of-bounds write in the following 'memset' call. Validate that the number of channels does not extends beyond the size of the channel list element. Signed-off-by: Phil Turnbull <philipturnbull@github.com> Tested-by: Ajay Kathat <ajay.kathat@microchip.com> Acked-by: Ajay Kathat <ajay.kathat@microchip.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20221123153543.8568-5-philipturnbull@github.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>