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| author | Kees Cook <kees@outflux.net> | 2023-04-05 15:55:13 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2023-04-06 20:29:12 +0200 |
| commit | 49bd783e4fe19c03d3ce97ab066e865acc6c7b15 (patch) | |
| tree | 933cf1bb93be1ecb5ee06e1ea38ff4b583e5c54e /include/acpi | |
| parent | 3a287932da6a97c84437669a6fec1486401893d2 (diff) | |
| download | lwn-49bd783e4fe19c03d3ce97ab066e865acc6c7b15.tar.gz lwn-49bd783e4fe19c03d3ce97ab066e865acc6c7b15.zip | |
ACPICA: acpi_dmar_andd: Replace 1-element array with flexible array
ACPICA commit 3c19ae70424e9ab1e1b805203d300d2660f9a2f7
Similar to "Replace one-element array with flexible-array", replace the
1-element array with a proper flexible array member as defined by C99.
This allows the code to operate without tripping compile-time and run-
time bounds checkers (e.g. via __builtin_object_size(), -fsanitize=bounds,
and/or -fstrict-flex-arrays=3).
The handling of struct acpi_dmar_andd by acpi_dm_dump_dmar() appears to
expect a single trailing char for calculating table offsets. Keep a char
in the union to avoid any code changes appearing in the .text or .data
sections.
Link: https://github.com/acpica/acpica/commit/3c19ae70
Signed-off-by: Kees Cook <kees@outflux.net>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/acpi')
| -rw-r--r-- | include/acpi/actbl1.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h index 6ee7437537db..58b0490a2ad1 100644 --- a/include/acpi/actbl1.h +++ b/include/acpi/actbl1.h @@ -901,7 +901,10 @@ struct acpi_dmar_andd { struct acpi_dmar_header header; u8 reserved[3]; u8 device_number; - char device_name[1]; + union { + char __pad; + ACPI_FLEX_ARRAY(char, device_name); + }; }; /* 5: SOC Integrated Address Translation Cache Reporting Structure */ |