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Differential D47670

acpi_gpiobus: Fix cleanup on set flags failure
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Authored by andrew on Nov 19 2024, 1:08 PM.
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cperciva
Commits
rG32de28db2327: acpi_gpiobus: Fix cleanup on set flags failure
rGbb8c68b25333: acpi_gpiobus: Fix cleanup on set flags failure
Summary

When GPIOBUS_PIN_SETFLAGS fails we called gpiobus_free_ivars to clean
up the contents of the ivar, then would free the ivar. This lead to a
use-after-free as the ivar had already been set on the child so
gpiobus_child_deleted would try to free it again.

Fix this by removing the early cleanup and letting
gpiobus_child_deleted handle it.

Fixes: c9e880c0ceef ("gpiobus: Use a bus_child_deleted method to free ivars for children")
Sponsored by: Arm Ltd

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rG FreeBSD src repository
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sys/
dev/
gpio/
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sys/dev/gpio/acpi_gpiobus.c

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