Commit 1d6664fa authored by Like Xu's avatar Like Xu Committed by Sean Christopherson
Browse files

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



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: default avatarLike Xu <likexu@tencent.com>
Link: https://lore.kernel.org/r/20230625073438.57427-1-likexu@tencent.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent fdf0eaf1

arch/x86/kvm/mmu/mmu.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

}

arch/x86/kvm/vmx/vmx.c

+2 −2
Original line number Diff line number Diff line
@@ -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)