Ahmed Salem 30e11a8cff ACPICA: Avoid sequence overread in call to strncmp() ... [ Upstream commit 64b9dfd077 ] ACPICA commit 8b83a8d88dfec59ea147fad35fc6deea8859c58c ap_get_table_length() checks if tables are valid by calling ap_is_valid_header(). The latter then calls ACPI_VALIDATE_RSDP_SIG(Table->Signature). ap_is_valid_header() accepts struct acpi_table_header as an argument, so the signature size is always fixed to 4 bytes. The problem is when the string comparison is between ACPI-defined table signature and ACPI_SIG_RSDP. Common ACPI table header specifies the Signature field to be 4 bytes long[1], with the exception of the RSDP structure whose signature is 8 bytes long "RSD PTR " (including the trailing blank character)[2]. Calling strncmp(sig, rsdp_sig, 8) would then result in a sequence overread[3] as sig would be smaller (4 bytes) than the specified bound (8 bytes). As a workaround, pass the bound conditionally based on the size of the signature being passed. Link: https://uefi.org/specs/ACPI/6.5_A/05_ACPI_Software_Programming_Model.html#system-description-table-header [1] Link: https://uefi.org/specs/ACPI/6.5_A/05_ACPI_Software_Programming_Model.html#root-system-description-pointer-rsdp-structure [2] Link: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wstringop-overread [3] Link: https://github.com/acpica/acpica/commit/8b83a8d8 Signed-off-by: Ahmed Salem <x0rw3ll@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://patch.msgid.link/2248233.Mh6RI2rZIc@rjwysocki.net Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-06-27 11:08:52 +01:00
..
platform	ACPICA: fix for conflict macro definition on zephyr interface	2023-07-10 15:21:04 +02:00
acbuffer.h	ACPICA: Update all copyrights/signons to 2023	2023-04-06 20:29:11 +02:00
acconfig.h	ACPICA: Update all copyrights/signons to 2023	2023-04-06 20:29:11 +02:00
acexcep.h	ACPICA: Update all copyrights/signons to 2023	2023-04-06 20:29:11 +02:00
acnames.h	ACPICA: Detect GED device and keep track of _EVT	2023-07-10 18:33:47 +02:00
acoutput.h	ACPICA: Update all copyrights/signons to 2023	2023-04-06 20:29:11 +02:00
acpi_bus.h	ACPI: x86: Move acpi_quirk_skip_serdev_enumeration() out of CONFIG_X86_ANDROID_TABLETS	2024-04-13 13:07:31 +02:00
acpi_drivers.h	ACPI: platform: Move SMB0001 HID to the header and reuse	2023-07-04 19:28:20 +02:00
acpi_io.h	Revert "ACPI: Add memory semantics to acpi_os_map_memory()"	2021-09-23 20:39:36 +02:00
acpi_lpat.h
acpi_numa.h	ACPI: processor: Replace kernel.h with the necessary inclusions	2021-11-24 17:44:04 +01:00
acpi.h	ACPICA: Update all copyrights/signons to 2023	2023-04-06 20:29:11 +02:00
acpiosxf.h	ACPICA: Update all copyrights/signons to 2023	2023-04-06 20:29:11 +02:00
acpixf.h	LoongArch: Fix warnings during S3 suspend	2025-02-08 09:52:27 +01:00
acrestyp.h	ACPICA: acpi_resource_irq: Replace 1-element arrays with flexible array	2023-04-06 20:29:12 +02:00
actbl.h	ACPI: CPPC: Add definition for undefined FADT preferred PM profile value	2023-06-21 18:44:56 +02:00
actbl1.h	ACPICA: Fix misspelled CDAT DSMAS define	2023-07-10 18:49:16 +02:00
actbl2.h	ACPICA: RHCT: Add flags, CMO and MMU nodes	2023-07-10 18:49:16 +02:00
actbl3.h	ACPICA: Add a define for size of struct acpi_srat_generic_affinity device_handle	2023-07-10 18:49:16 +02:00
actypes.h	ACPICA: Avoid sequence overread in call to strncmp()	2025-06-27 11:08:52 +01:00
acuuid.h	ACPICA: Update all copyrights/signons to 2023	2023-04-06 20:29:11 +02:00
apei.h	ACPI: APEI: Fix missing ERST record id	2022-04-13 20:29:24 +02:00
battery.h	ACPI: battery: Pass battery hook pointer to hook callbacks	2022-11-16 08:48:18 +01:00
button.h
cppc_acpi.h	ACPI: CPPC: Make rmw_lock a raw_spin_lock	2024-11-08 16:28:20 +01:00
ghes.h	ACPI: APEI: Fix AER info corruption when error status data has multiple sections	2023-11-28 17:19:37 +00:00
hed.h
nfit.h
pcc.h	mailbox: pcc: Check before sending MCTP PCC response ACK	2025-01-09 13:31:45 +01:00
proc_cap_intel.h	ACPI: processor: Introduce acpi_processor_osc()	2023-07-14 17:59:40 +02:00
processor.h	cpu-hotplug: Provide prototypes for arch CPU registration	2023-10-11 14:27:37 +02:00
reboot.h
video.h	ACPI: video: Remove register_backlight_delay module option and code	2023-04-11 20:55:46 +02:00