bpf, x64: Propagate tailcall info only for subprogs

In x64 JIT, propagate tailcall info only for subprogs, not for helpers or kfuncs. Signed-off-by: Leon Hwang <[email protected]>
kernel-patches · Nov 1, 2024 · 4aa39f9 · 4aa39f9
1 parent a37c487
commit 4aa39f9
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
@@ -2124,10 +2124,11 @@ st:			if (is_imm8(insn->off))
 
 			/* call */
 		case BPF_JMP | BPF_CALL: {
+			bool pseudo_call = src_reg == BPF_PSEUDO_CALL;
 			u8 *ip = image + addrs[i - 1];
 
 			func = (u8 *) __bpf_call_base + imm32;
-			if (tail_call_reachable) {
+			if (pseudo_call && tail_call_reachable) {
 				LOAD_TAIL_CALL_CNT_PTR(bpf_prog->aux->stack_depth);
 				ip += 7;
 			}