From: James Morse james.morse@arm.com
stable inclusion from stable-v5.10.107 commit 7a0d13ef67a1084e1a77bf4d2334cc482699f861 category: bugfix bugzilla: 186460 https://gitee.com/src-openeuler/kernel/issues/I53MHA CVE: CVE-2022-23960
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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KVM's infrastructure for spectre mitigations in the vectors in v5.10 and earlier is different, it uses templates which are used to build a set of vectors at runtime.
There are two copy-and-paste errors in the templates: __spectre_bhb_loop_k24 should loop 24 times and __spectre_bhb_loop_k32 32.
Fix these.
Reported-by: Pavel Machek pavel@denx.de Link: https://lore.kernel.org/all/20220310234858.GB16308@amd/ Signed-off-by: James Morse james.morse@arm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jiahao chenjiahao16@huawei.com Reviewed-by: Liao Chang liaochang1@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- arch/arm64/kvm/hyp/smccc_wa.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kvm/hyp/smccc_wa.S b/arch/arm64/kvm/hyp/smccc_wa.S index 24b281912463..533b0aa73256 100644 --- a/arch/arm64/kvm/hyp/smccc_wa.S +++ b/arch/arm64/kvm/hyp/smccc_wa.S @@ -68,7 +68,7 @@ SYM_DATA_START(__spectre_bhb_loop_k24) esb sub sp, sp, #(8 * 2) stp x0, x1, [sp, #(8 * 0)] - mov x0, #8 + mov x0, #24 2: b . + 4 subs x0, x0, #1 b.ne 2b @@ -85,7 +85,7 @@ SYM_DATA_START(__spectre_bhb_loop_k32) esb sub sp, sp, #(8 * 2) stp x0, x1, [sp, #(8 * 0)] - mov x0, #8 + mov x0, #32 2: b . + 4 subs x0, x0, #1 b.ne 2b