Mark Langsdorf ee3fe99ff0 ACPI: SPCR: check if table->serial_port.access_width is too wide
If table->serial_port.access_width is more than 29, it causes
undefined behavior when ACPI_ACCESS_BIT_WIDTH shifts it to
(1 << ((size) + 2)):

[    0.000000] UBSAN: Undefined behaviour in drivers/acpi/spcr.c:114:11
[    0.000000] shift exponent 102 is too large for 32-bit type 'int'

Use the new ACPI_ACCESS_ defines to test that serial_port.access_width
is less than 30 and set it to 6 if it is not.

Signed-off-by: Mark Langsdorf <mlangsdo@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-01-11 16:39:14 +01:00
..
2021-06-23 19:27:50 +02:00
2020-11-09 19:25:20 +01:00
2021-06-07 15:36:46 +02:00
2020-11-09 19:08:06 +01:00
2022-01-10 20:26:56 -08:00
2021-06-25 15:02:43 +02:00
2020-11-09 19:08:06 +01:00