CVE-2025-39771

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> regulator: pca9450: Use devm_register_sys_off_handler<br /> <br /> With module test, there is error dump:<br /> ------------[ cut here ]------------<br /> notifier callback pca9450_i2c_restart_handler already registered<br /> WARNING: kernel/notifier.c:23 at notifier_chain_register+0x5c/0x88,<br /> CPU#0: kworker/u16:3/50<br /> Call trace:<br /> notifier_chain_register+0x5c/0x88 (P)<br /> atomic_notifier_chain_register+0x30/0x58<br /> register_restart_handler+0x1c/0x28<br /> pca9450_i2c_probe+0x418/0x538<br /> i2c_device_probe+0x220/0x3d0<br /> really_probe+0x114/0x410<br /> __driver_probe_device+0xa0/0x150<br /> driver_probe_device+0x40/0x114<br /> __device_attach_driver+0xd4/0x12c<br /> <br /> So use devm_register_sys_off_handler to let kernel handle the resource<br /> free to avoid kernel dump.