[openwrt/openwrt] kernel: add missing KASAN config symbols

[LEDE Commits]

stintel pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/ec68c75c629eed149ed4416d5300328deb53a417

commit ec68c75c629eed149ed4416d5300328deb53a417
Author: Stijn Tintel <stijn at linux-ipv6.be>
AuthorDate: Wed Nov 3 20:00:26 2021 +0200

    kernel: add missing KASAN config symbols
    
    Enabling KERNEL_KASAN exposes several missing symbols. As KASAN_SW_TAGS
    is only implemented for arm64 CPUs and requires clang, it doesn't make
    sense to make this a build option so just default to KASAN_GENERIC and
    disable KASAN_SW_TAGS.
    
    While at it, disable TEST_KASAN_MODULE in the generic 5.10 config.
    
    Fixes build failures with KERNEL_KASAN enabled.
    
    Signed-off-by: Stijn Tintel <stijn at linux-ipv6.be>
    Acked-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 config/Config-kernel.in          | 7 +++++++
 target/linux/generic/config-5.10 | 1 +
 2 files changed, 8 insertions(+)

diff --git a/config/Config-kernel.in b/config/Config-kernel.in
index dc249a6031..2243e3e5bc 100644
--- a/config/Config-kernel.in
+++ b/config/Config-kernel.in
@@ -147,6 +147,13 @@ config KERNEL_KASAN_EXTRA
 	  compile time.
 	  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 has more
 
+if KERNEL_KASAN
+	config KERNEL_KASAN_GENERIC
+	def_bool y
+
+	config KERNEL_KASAN_SW_TAGS
+	def_bool n
+endif
 
 choice
 	prompt "Instrumentation type"
diff --git a/target/linux/generic/config-5.10 b/target/linux/generic/config-5.10
index 7b952e8ca8..403712d0e9 100644
--- a/target/linux/generic/config-5.10
+++ b/target/linux/generic/config-5.10
@@ -6064,6 +6064,7 @@ CONFIG_TCP_CONG_CUBIC=y
 # CONFIG_TEST_HASH is not set
 # CONFIG_TEST_HEXDUMP is not set
 # CONFIG_TEST_IDA is not set
+# CONFIG_TEST_KASAN_MODULE is not set
 # CONFIG_TEST_KMOD is not set
 # CONFIG_TEST_KSTRTOX is not set
 # CONFIG_TEST_LIST_SORT is not set