Description
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.
Product status
bb4de81eb940e7027f37a6fd3b7ddcb4403deb56 before abd9b2ee4047ccd980decbf26d61f9637604b1d5
4459118977665f681017e1299933895d54b6e87b before a9a505f5b39d8fff1a55963a5e524c84639e98b2
81e6b51709da162b94e40a445bb60856406beaa1 before 04301da4d87067a989f70ee56942bf9d97cd2a45
322b70b522abe03cd59712bb47a72eddd835d19d before a2d9d884e84bfd37892219b1f55847f36d8e9901
3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before 5e22217c11424ef958ba28d03ff7167b4d7a8914
3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before 523f6268e86552a048975749251184c4e9a4b38f
3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before e3a0ddbaf7f1f9ffc070718b417461ced3268758
3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before 4aae44f65827f0213a7361cf9c32cfe06114473f
7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b
1c90a357cef4219cb436e59cc7463888103e104b
5.15
Any version before 5.15
4.14.326
4.19.295
5.4.257
5.10.195
5.15.132
6.1.54
6.5.4
6.6
References
git.kernel.org/...c/abd9b2ee4047ccd980decbf26d61f9637604b1d5
git.kernel.org/...c/a9a505f5b39d8fff1a55963a5e524c84639e98b2
git.kernel.org/...c/04301da4d87067a989f70ee56942bf9d97cd2a45
git.kernel.org/...c/a2d9d884e84bfd37892219b1f55847f36d8e9901
git.kernel.org/...c/5e22217c11424ef958ba28d03ff7167b4d7a8914
git.kernel.org/...c/523f6268e86552a048975749251184c4e9a4b38f
git.kernel.org/...c/e3a0ddbaf7f1f9ffc070718b417461ced3268758
git.kernel.org/...c/4aae44f65827f0213a7361cf9c32cfe06114473f
