linux-kernel - Re: [PATCH AUTOSEL 6.3 5/7] riscv: Unconditionnally select KASAN

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Date:   Thu, 18 May 2023 13:45:23 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Alexandre Ghiti <alex@...ti.fr>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Alexandre Ghiti <alexghiti@...osinc.com>,
        Björn Töpel <bjorn@...osinc.com>,
        Palmer Dabbelt <palmer@...osinc.com>, paul.walmsley@...ive.com,
        palmer@...belt.com, aou@...s.berkeley.edu,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH AUTOSEL 6.3 5/7] riscv: Unconditionnally select
 KASAN_VMALLOC if KASAN

On Fri, May 12, 2023 at 11:51:03AM +0200, Alexandre Ghiti wrote:
>Hi Sasha,
>
>On 5/9/23 05:54, Sasha Levin wrote:
>>From: Alexandre Ghiti <alexghiti@...osinc.com>
>>
>>[ Upstream commit 864046c512c2cd8418dc928b91981fb12a80396c ]
>>
>>If KASAN is enabled, VMAP_STACK depends on KASAN_VMALLOC so enable
>>KASAN_VMALLOC with KASAN so that we can enable VMAP_STACK by default.
>>
>>Signed-off-by: Alexandre Ghiti <alexghiti@...osinc.com>
>>Reviewed-by: Björn Töpel <bjorn@...osinc.com>
>>Link: https://lore.kernel.org/r/20230203075232.274282-7-alexghiti@rivosinc.com
>>Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
>>Signed-off-by: Sasha Levin <sashal@...nel.org>
>>---
>>  arch/riscv/Kconfig | 1 +
>>  1 file changed, 1 insertion(+)
>>
>>diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
>>index eb7f29a412f87..d6aad84efb95e 100644
>>--- a/arch/riscv/Kconfig
>>+++ b/arch/riscv/Kconfig
>>@@ -118,6 +118,7 @@ config RISCV
>>  	select HAVE_SYSCALL_TRACEPOINTS
>>  	select IRQ_DOMAIN
>>  	select IRQ_FORCED_THREADING
>>+	select KASAN_VMALLOC if KASAN
>>  	select MODULES_USE_ELF_RELA if MODULES
>>  	select MODULE_SECTIONS if MODULES
>>  	select OF
>
>
>KASAN_VMALLOC is broken for any kernel < 6.4, so this one should not 
>be backported to any kernel (5.15, 6.1, 6.2, 6.3).

Ack, dropped. Thanks!

-- 
Thanks,
Sasha