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>
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);
}
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)