Vulnerability CVE-2022-48891
Published: 2024-08-21

Description:
In the Linux kernel, the following vulnerability has been resolved:

regulator: da9211: Use irq handler when ready

If the system does not come from reset (like when it is kexec()), the
regulator might have an IRQ waiting for us.

If we enable the IRQ handler before its structures are ready, we crash.

This patch fixes:

[ 1.141839] Unable to handle kernel read from unreadable memory at virtual address 0000000000000078
[ 1.316096] Call trace:
[ 1.316101] blocking_notifier_call_chain+0x20/0xa8
[ 1.322757] cpu cpu0: dummy supplies not allowed for exclusive requests
[ 1.327823] regulator_notifier_call_chain+0x1c/0x2c
[ 1.327825] da9211_irq_handler+0x68/0xf8
[ 1.327829] irq_thread+0x11c/0x234
[ 1.327833] kthread+0x13c/0x154

 References:
https://git.kernel.org/stable/c/1c1afcb8839b91c09d211ea304faa269763b1f91
https://git.kernel.org/stable/c/f75cde714e0a67f73ef169aa50d4ed77d04f7236
https://git.kernel.org/stable/c/d443308edbfb6e9e757b478af908515110d1efd5
https://git.kernel.org/stable/c/d4aa749e046435f054e94ebf50cad143d6229fae
https://git.kernel.org/stable/c/470f6a9175f13a53810734658c35cc5bba33be01
https://git.kernel.org/stable/c/ad1336274f733a7cb1f87b5c5908165a2c14df53
https://git.kernel.org/stable/c/02228f6aa6a64d588bc31e3267d05ff184d772eb
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