irqchip/renesas-irqc: Fix generic interrupt chip leak on remove

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The driver allocates domain generic chips probe. However, on driver
removal, the generic chips are not automatically freed when the interrupt
domain is removed because the domain flags do not include
IRQ_DOMAIN_FLAG_DESTROY_GC.

This causes both the domain generic chips structure and the associated
generic chips to be leaked. Additionally, the generic chips remain on the
global list and may later be accessed by generic interrupt chip suspend,
resume, or shutdown callbacks after the driver has been removed,
potentially resulting in a use-after-free and kernel crash.

Fix the resource leak by setting IRQ_DOMAIN_FLAG_DESTROY_GC on the
interrupt domain; this lets the interrupt domain core automatically
release all generic chips when irq_domain_remove() is invoked, removing
the need for manual cleanup calls in error paths and remove callback.

Fixes: 99c221df33 ("irqchip/renesas-irqc: Move over to nested generic chip")
Signed-off-by: Qingshuang Fu <fuqingshuang@kylinos.cn>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260708100846.506314-1-fffsqian@163.com

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Qingshuang Fu 2026-07-08 18:08:46 +08:00 • committed by Thomas Gleixner

parent 0d6a7c4179

commit 616dd89d81

1 changed files with 1 additions and 0 deletions

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drivers/irqchip/irq-renesas-irqc.c

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