CVE-2023-53472

In the Linux kernel, the following vulnerability has been resolved: pwm: lpc32xx: Remove handling of PWM channels Because LPC32xx PWM controllers have only a single output which is registered as the only PWM device/channel per controller, it is known in advance that pwm->hwpwm value is always 0. On basis of this fact simplify the code by removing operations with pwm->hwpwm, there is no controls which require channel number as input. Even though I wasn't aware at the time when I forward ported that patch, this fixes a null pointer dereference as lpc32xx->chip.pwms is NULL before devm_pwmchip_add() is called.

• linux linux kernel (>= 4.9.284 < 4.10) • linux linux kernel (>= 4.14.248 < 4.14.326) • linux linux kernel (>= 4.19.208 < 4.19.295) • linux linux kernel (>= 5.4.149 < 5.4.257) • linux linux kernel (>= 5.10.69 < 5.10.195) • linux linux kernel (>= 5.14.8 < 5.15.132) • linux linux kernel (>= 5.16 < 6.1.54) • linux linux kernel (>= 6.2 < 6.5.4)