pwm: Fix out-of-bounds access in of_pwm_single_xlate()
commita297d07b9a
upstream. With args->args_count == 2 args->args[2] is not defined. Actually the flags are contained in args->args[1]. Fixes:3ab7b6ac5d
("pwm: Introduce single-PWM of_xlate function") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/243908750d306e018a3d4bf2eb745d53ab50f663.1704835845.git.u.kleine-koenig@pengutronix.de Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -176,7 +176,7 @@ of_pwm_single_xlate(struct pwm_chip *chip, const struct of_phandle_args *args)
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pwm->args.period = args->args[0];
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pwm->args.polarity = PWM_POLARITY_NORMAL;
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if (args->args_count == 2 && args->args[2] & PWM_POLARITY_INVERTED)
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if (args->args_count == 2 && args->args[1] & PWM_POLARITY_INVERTED)
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pwm->args.polarity = PWM_POLARITY_INVERSED;
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return pwm;
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