]> www.infradead.org Git - users/jedix/linux-maple.git/commit
ACPICA: Refuse to evaluate a method if arguments are missing
authorRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 18 Jun 2025 12:17:45 +0000 (14:17 +0200)
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>
Wed, 18 Jun 2025 19:12:13 +0000 (21:12 +0200)
commit6fcab2791543924d438e7fa49276d0998b0a069f
tree67f23eeba1db09bad3a80b3c57c5389932e645de
parente04c78d86a9699d136910cfc0bdcf01087e3267e
ACPICA: Refuse to evaluate a method if arguments are missing

As reported in [1], a platform firmware update that increased the number
of method parameters and forgot to update a least one of its callers,
caused ACPICA to crash due to use-after-free.

Since this a result of a clear AML issue that arguably cannot be fixed
up by the interpreter (it cannot produce missing data out of thin air),
address it by making ACPICA refuse to evaluate a method if the caller
attempts to pass fewer arguments than expected to it.

Closes: https://github.com/acpica/acpica/issues/1027 [1]
Reported-by: Peter Williams <peter@newton.cx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Hans de Goede <hansg@kernel.org>
Tested-by: Hans de Goede <hansg@kernel.org> # Dell XPS 9640 with BIOS 1.12.0
Link: https://patch.msgid.link/5909446.DvuYhMxLoT@rjwysocki.net
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
drivers/acpi/acpica/dsmethod.c