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| author | Mark Langsdorf <mlangsdo@redhat.com> | 2022-01-05 11:47:14 -0600 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2022-01-11 16:39:14 +0100 |
| commit | ee3fe99ff0a27108ac38d9766ac0e92f5ec35692 (patch) | |
| tree | 04191cd3135a5fc1aee346d98e9f94c5d2890c89 /crypto | |
| parent | bca21755b9fc00dbe371994b53389eb5d70b8e72 (diff) | |
| download | linux-stable-ee3fe99ff0a27108ac38d9766ac0e92f5ec35692.tar.gz linux-stable-ee3fe99ff0a27108ac38d9766ac0e92f5ec35692.tar.bz2 linux-stable-ee3fe99ff0a27108ac38d9766ac0e92f5ec35692.zip | |
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>
Diffstat (limited to 'crypto')
0 files changed, 0 insertions, 0 deletions