From: Josh Poimboeuf jpoimboe@kernel.org
stable inclusion from stable-v5.10.198 commit ae806c74c0634b0c23855066d8ba28d850fd1260 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I987V5 CVE: CVE-2023-52575
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 01b057b2f4cc2d905a0bd92195657dbd9a7005ab ]
If the user has requested no SRSO mitigation, other mitigations can use the lighter-weight SBPB instead of IBPB.
Fixes: fb3bd914b3ec ("x86/srso: Add a Speculative RAS Overflow mitigation") Signed-off-by: Josh Poimboeuf jpoimboe@kernel.org Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Borislav Petkov (AMD) bp@alien8.de Acked-by: Borislav Petkov (AMD) bp@alien8.de Link: https://lore.kernel.org/r/b20820c3cfd1003171135ec8d762a0b957348497.169388998... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: sanglipeng sanglipeng1@jd.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- arch/x86/kernel/cpu/bugs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index f12394ea736a..8a4c8cb5001b 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -2393,7 +2393,7 @@ static void __init srso_select_mitigation(void)
switch (srso_cmd) { case SRSO_CMD_OFF: - return; + goto pred_cmd;
case SRSO_CMD_MICROCODE: if (has_microcode) {