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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2025-04-22 17:16:16 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-04-26 10:17:24 +0200 |
| commit | 3318dc299b072a0511d6dfd8367f3304fb6d9827 (patch) | |
| tree | 7c9544ee7d852b9c47c9ce19384498f045218067 /rust/helpers/task.c | |
| parent | 9d7a0577c9db35c4cc52db90bc415ea248446472 (diff) | |
| download | linux-3318dc299b072a0511d6dfd8367f3304fb6d9827.tar.gz linux-3318dc299b072a0511d6dfd8367f3304fb6d9827.tar.bz2 linux-3318dc299b072a0511d6dfd8367f3304fb6d9827.zip | |
irqchip/gic-v2m: Prevent use after free of gicv2m_get_fwnode()
With ACPI in place, gicv2m_get_fwnode() is registered with the pci
subsystem as pci_msi_get_fwnode_cb(), which may get invoked at runtime
during a PCI host bridge probe. But, the call back is wrongly marked as
__init, causing it to be freed, while being registered with the PCI
subsystem and could trigger:
Unable to handle kernel paging request at virtual address ffff8000816c0400
gicv2m_get_fwnode+0x0/0x58 (P)
pci_set_bus_msi_domain+0x74/0x88
pci_register_host_bridge+0x194/0x548
This is easily reproducible on a Juno board with ACPI boot.
Retain the function for later use.
Fixes: 0644b3daca28 ("irqchip/gic-v2m: acpi: Introducing GICv2m ACPI support")
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Diffstat (limited to 'rust/helpers/task.c')
0 files changed, 0 insertions, 0 deletions