pwm: lpc32xx: Remove handling of PWM channels
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.1%
exploitation probability
0.1%top 96% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473fhttps://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38fhttps://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758