build: Add option KERNEL_UBSAN

[openwrt/staging/jogo.git] / config / Config-kernel.in

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index db17f6a9dd14eeb9d6912002cd1634a6c5656a70..e8bcf1970fd31cb375f370651918acaca66bc30d 100644 (file)
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -85,6 +85,41 @@ config KERNEL_PROFILING
          Enable the extended profiling support mechanisms used by profilers such
          as OProfile.
 
+config KERNEL_UBSAN
+       bool "Compile the kernel with undefined behaviour sanity checker"
+       help
+         This option enables undefined behaviour sanity checker
+         Compile-time instrumentation is used to detect various undefined
+         behaviours in runtime. Various types of checks may be enabled
+         via boot parameter ubsan_handle
+         (see: Documentation/dev-tools/ubsan.rst).
+
+config KERNEL_UBSAN_SANITIZE_ALL
+       bool "Enable instrumentation for the entire kernel"
+       depends on KERNEL_UBSAN
+       default y
+       help
+         This option activates instrumentation for the entire kernel.
+         If you don't enable this option, you have to explicitly specify
+         UBSAN_SANITIZE := y for the files/directories you want to check for UB.
+         Enabling this option will get kernel image size increased
+         significantly.
+
+config KERNEL_UBSAN_ALIGNMENT
+       bool "Enable checking of pointers alignment"
+       depends on KERNEL_UBSAN
+       help
+         This option enables detection of unaligned memory accesses.
+         Enabling this option on architectures that support unaligned
+         accesses may produce a lot of false positives.
+
+config KERNEL_UBSAN_NULL
+       bool "Enable checking of null pointers"
+       depends on KERNEL_UBSAN
+       help
+         This option enables detection of memory accesses via a
+         null pointer.
+
 config KERNEL_TASKSTATS
        bool "Compile the kernel with task resource/io statistics and accounting"
        default n