diff options
| author | Mostafa Saleh | 2025-04-30 16:27:10 +0000 |
|---|---|---|
| committer | Marc Zyngier | 2025-05-07 11:21:35 +0100 |
| commit | 61b38f7591fb434fce326c1d686a9793c7f418bc (patch) | |
| tree | 8740dc16c8e16ff51dc20e67d740dbf9d6e6290a /lib/Kconfig.ubsan | |
| parent | d683a8561889c1813fe2ad6082769c91e3cb71b3 (diff) | |
KVM: arm64: Introduce CONFIG_UBSAN_KVM_EL2
Add a new Kconfig CONFIG_UBSAN_KVM_EL2 for KVM which enables
UBSAN for EL2 code (in protected/nvhe/hvhe) modes.
This will re-use the same checks enabled for the kernel for
the hypervisor. The only difference is that for EL2 it always
emits a "brk" instead of implementing hooks as the hypervisor
can't print reports.
The KVM code will re-use the same code for the kernel
"report_ubsan_failure()" so #ifdefs are changed to also have this
code for CONFIG_UBSAN_KVM_EL2
Signed-off-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Kees Cook <kees@kernel.org>
Link: https://lore.kernel.org/r/20250430162713.1997569-4-smostafa@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'lib/Kconfig.ubsan')
| -rw-r--r-- | lib/Kconfig.ubsan | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan index f6ea0c5b5da3..42ed41804644 100644 --- a/lib/Kconfig.ubsan +++ b/lib/Kconfig.ubsan @@ -165,4 +165,13 @@ config TEST_UBSAN This is a test module for UBSAN. It triggers various undefined behavior, and detect it. +config UBSAN_KVM_EL2 + bool "UBSAN for KVM code at EL2" + depends on ARM64 + help + Enable UBSAN when running on ARM64 with KVM in a split mode + (nvhe/hvhe/protected) for the hypervisor code running in EL2. + In this mode, any UBSAN violation in EL2 would panic the kernel + and information similar to UBSAN_TRAP would be printed. + endif # if UBSAN |