FAILED: patch "[PATCH] arm64: proton-pack: Include unprivileged eBPF status in" failed to apply to 5.4-stable tree

index d3fbff00993d..6d45c63c6454 100644
@@ -18,6 +18,7 @@
  */
 
 #include <linux/arm-smccc.h>
+#include <linux/bpf.h>
 #include <linux/cpu.h>
 #include <linux/device.h>
 #include <linux/nospec.h>

@@ -111,6 +112,15 @@ static const char *get_bhb_affected_string(enum mitigation_state bhb_state)
 	}
 }
 
+static bool _unprivileged_ebpf_enabled(void)
+{
+#ifdef CONFIG_BPF_SYSCALL
+	return !sysctl_unprivileged_bpf_disabled;
+#else
+	return false;
+#endif
+}
+
 ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr,
 			    char *buf)
 {

@@ -130,6 +140,9 @@ ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr,
 		v2_str = "CSV2";
 		fallthrough;
 	case SPECTRE_MITIGATED:
+		if (bhb_state == SPECTRE_MITIGATED && _unprivileged_ebpf_enabled())
+			return sprintf(buf, "Vulnerable: Unprivileged eBPF enabled\n");
+
 		return sprintf(buf, "Mitigation: %s%s\n", v2_str, bhb_str);
 	case SPECTRE_VULNERABLE:
 		fallthrough;

@@ -1125,3 +1138,16 @@ void __init spectre_bhb_patch_clearbhb(struct alt_instr *alt,
 	*updptr++ = cpu_to_le32(aarch64_insn_gen_nop());
 	*updptr++ = cpu_to_le32(aarch64_insn_gen_nop());
 }
+
+#ifdef CONFIG_BPF_SYSCALL
+#define EBPF_WARN "Unprivileged eBPF is enabled, data leaks possible via Spectre v2 BHB attacks!\n"
+void unpriv_ebpf_notify(int new_state)
+{
+	if (spectre_v2_state == SPECTRE_VULNERABLE ||
+	    spectre_bhb_state != SPECTRE_MITIGATED)
+		return;
+
+	if (!new_state)
+		pr_err("WARNING: %s", EBPF_WARN);
+}
+#endif