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pwm: Fix out-of-bounds access in of_pwm_single_xlate()

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commit a297d07b9a1e4fb8cda25a4a2363a507d294b7c9 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>
This commit is contained in:
Uwe Kleine-König 2024-01-09 22:34:31 +01:00 • committed by Greg Kroah-Hartman
parent 080d2c608b
commit e5f2b4b629
1 changed files with 1 additions and 1 deletions
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2
drivers/pwm/core.c
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@ -176,7 +176,7 @@ of_pwm_single_xlate(struct pwm_chip *chip, const struct of_phandle_args *args)
pwm->args.period = args->args[0];
pwm->args.polarity = PWM_POLARITY_NORMAL;
if (args->args_count == 2 && args->args[2] & PWM_POLARITY_INVERTED)
if (args->args_count == 2 && args->args[1] & PWM_POLARITY_INVERTED)
pwm->args.polarity = PWM_POLARITY_INVERSED;
return pwm;