irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing

Browse source

In gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond
to a logical cpu recognized by the kernel, resulting in the cpu variable
initialization to an error value.

Currently, the get_logical_index() return value is not checked for failure,
which might result in out-of-bounds memory corruption while trying to
index a per_cpu variable array.

Add a check to evaluate get_logical_index() return value.

Fixes: 35866efa52 ("irqchip/gic-v5: Add ACPI IRS probing")
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://sashiko.dev/#/message/20260810104747.E5CE71F000E9%40smtp.kernel.org
Link: https://patch.msgid.link/20260812-gicv5-7-2-fixes-v1-1-3743e82c69a4@kernel.org

...

This commit is contained in:

Lorenzo Pieralisi 2026-08-12 11:10:29 +02:00 • committed by Thomas Gleixner

parent ac6db0e0be

commit 328affc639

1 changed files with 2 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

drivers/irqchip/irq-gic-v5-irs.c

View file