Messages in this thread | | | Subject | Re: [PATCH] kasan: push back KASAN_STACK detection to clang-10 | From | Andrey Ryabinin <> | Date | Thu, 18 Jul 2019 19:18:28 +0300 |
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On 7/18/19 5:14 PM, Arnd Bergmann wrote: > asan-stack mode still uses dangerously large kernel stacks of > tens of kilobytes in some drivers, and it does not seem that anyone > is working on the clang bug. > > Let's push this back to clang-10 for now so users don't run into > this by accident, and we can test-build allmodconfig kernels using > clang-9 without drowning in warnings. > > Link: https://bugs.llvm.org/show_bug.cgi?id=38809 > Fixes: 6baec880d7a5 ("kasan: turn off asan-stack for clang-8 and earlier") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > --- > lib/Kconfig.kasan | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan > index 4fafba1a923b..2f260bb63d77 100644 > --- a/lib/Kconfig.kasan > +++ b/lib/Kconfig.kasan > @@ -106,7 +106,7 @@ endchoice > > config KASAN_STACK_ENABLE > bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST > - default !(CLANG_VERSION < 90000) > + default !(CLANG_VERSION < 100000)
Wouldn't be better to make this thing for any clang version? And only when the bug is finally fixed, specify the clang version which can enable this safely.
> depends on KASAN > help > The LLVM stack address sanitizer has a know problem that >
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