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KVM: x86: Use sysfs_emit() instead of sprintf()

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Use sysfs_emit() instead of the sprintf() for sysfs entries. sysfs_emit()
knows the maximum of the temporary buffer used for outputting sysfs
content and avoids overrunning the buffer length.

Signed-off-by: Like Xu <likexu@tencent.com>
Link: https://lore.kernel.org/r/20230625073438.57427-1-likexu@tencent.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Like Xu 2023-06-25 15:34:38 +08:00 committed by Sean Christopherson
parent fdf0eaf114
commit 1d6664fadd
2 changed files with 3 additions and 3 deletions
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2
arch/x86/kvm/mmu/mmu.c
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@ -6862,7 +6862,7 @@ static void mmu_destroy_caches(void)
static int get_nx_huge_pages(char *buffer, const struct kernel_param *kp)
{
if (nx_hugepage_mitigation_hard_disabled)
return sprintf(buffer, "never\n");
return sysfs_emit(buffer, "never\n");
return param_get_bool(buffer, kp);
}

4
arch/x86/kvm/vmx/vmx.c
View File

@ -366,9 +366,9 @@ static int vmentry_l1d_flush_set(const char *s, const struct kernel_param *kp)
static int vmentry_l1d_flush_get(char *s, const struct kernel_param *kp)
{
if (WARN_ON_ONCE(l1tf_vmx_mitigation >= ARRAY_SIZE(vmentry_l1d_param)))
return sprintf(s, "???\n");
return sysfs_emit(s, "???\n");
return sprintf(s, "%s\n", vmentry_l1d_param[l1tf_vmx_mitigation].option);
return sysfs_emit(s, "%s\n", vmentry_l1d_param[l1tf_vmx_mitigation].option);
}
static void vmx_setup_fb_clear_ctrl(void)