From: Kees Cook Date: Wed, 5 Apr 2023 13:54:25 +0000 (+0200) Subject: ACPICA: acpi_pci_routing_table: Replace fixed-size array with flex array member X-Git-Tag: v6.4-rc1~149^2~4^2~6 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=3a287932da6a97c84437669a6fec1486401893d2;p=tomoyo%2Ftomoyo-test1.git ACPICA: acpi_pci_routing_table: Replace fixed-size array with flex array member ACPICA commit f4a3afd78c28dede0907f47951f0b73c9a776d4e The "Source" array is actually a dynamically sized array, but it is defined as a fixed-size 4 byte array. This results in tripping both compile-time and run-time bounds checkers (e.g. via either __builtin_object_size() or -fsanitize=bounds). To retain the padding, create a union with an unused Pad variable of size 4, and redefine Source as a proper flexible array member. No binary changes appear in the .text nor .data sections. Link: https://github.com/acpica/acpica/commit/f4a3afd7 Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- diff --git a/include/acpi/acrestyp.h b/include/acpi/acrestyp.h index bfba293787ba..87d58afca79e 100644 --- a/include/acpi/acrestyp.h +++ b/include/acpi/acrestyp.h @@ -693,7 +693,10 @@ struct acpi_pci_routing_table { u32 pin; u64 address; /* here for 64-bit alignment */ u32 source_index; - char source[4]; /* pad to 64 bits so sizeof() works in all cases */ + union { + char pad[4]; /* pad to 64 bits so sizeof() works in all cases */ + ACPI_FLEX_ARRAY(char, source); + }; }; #endif /* __ACRESTYP_H__ */