Vulnerability CVE-2024-27412
Published: 2024-05-17

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

power: supply: bq27xxx-i2c: Do not free non existing IRQ

The bq27xxx i2c-client may not have an IRQ, in which case
client->irq will be 0. bq27xxx_battery_i2c_probe() already has
an if (client->irq) check wrapping the request_threaded_irq().

But bq27xxx_battery_i2c_remove() unconditionally calls
free_irq(client->irq) leading to:

[ 190.310742] ------------[ cut here ]------------
[ 190.310843] Trying to free already-free IRQ 0
[ 190.310861] WARNING: CPU: 2 PID: 1304 at kernel/irq/manage.c:1893 free_irq+0x1b8/0x310

Followed by a backtrace when unbinding the driver. Add
an if (client->irq) to bq27xxx_battery_i2c_remove() mirroring
probe() to fix this.

 References:
https://git.kernel.org/stable/c/d4d813c0a14d6bf52d810a55db06a2e7e3d98eaa
https://git.kernel.org/stable/c/7394abc8926adee6a817bab10797e0adc898af77
https://git.kernel.org/stable/c/d7acc4a569f5f4513120c85ea2b9f04909b7490f
https://git.kernel.org/stable/c/e601ae81910ce6a3797876e190a2d8ef6cf828bc
https://git.kernel.org/stable/c/cefe18e9ec84f8fe3e198ccebb815cc996eb9797
https://git.kernel.org/stable/c/fbca8bae1ba79d443a58781b45e92a73a24ac8f8
https://git.kernel.org/stable/c/083686474e7c97b0f8b66df37fcb64e432e8b771
https://git.kernel.org/stable/c/2df70149e73e79783bcbc7db4fa51ecef0e2022c
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