Commit 71c751f2 authored by Mark Rutland's avatar Mark Rutland Committed by Will Deacon

arm64: add sentinel to kpti_safe_list

We're missing a sentinel entry in kpti_safe_list. Thus is_midr_in_range_list()
can walk past the end of kpti_safe_list. Depending on the contents of memory,
this could erroneously match a CPU's MIDR, cause a data abort, or other bad
outcomes.

Add the sentinel entry to avoid this.

Fixes: be5b2998 ("arm64: capabilities: Add support for checks based on a list of MIDRs")
Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
Reported-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Tested-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 6d08b06e
......@@ -868,6 +868,7 @@ static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry,
static const struct midr_range kpti_safe_list[] = {
MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2),
MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN),
{ /* sentinel */ }
};
char const *str = "command line option";
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment