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bpf: Propagate error from visit_tailcall_insn

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Commit e40f5a6bf8 ("bpf: correct stack liveness for tail calls") added
visit_tailcall_insn() but did not check its return value.

Fixes: e40f5a6bf8 ("bpf: correct stack liveness for tail calls")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20260408191242.526279-1-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Daniel Borkmann 2026-04-08 21:12:39 +02:00 committed by Alexei Starovoitov
parent c7cab53f9d
commit 6bd96e40f3
1 changed files with 5 additions and 2 deletions
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7
kernel/bpf/verifier.c
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@ -19355,8 +19355,11 @@ static int visit_insn(int t, struct bpf_verifier_env *env)
mark_subprog_might_sleep(env, t);
if (bpf_helper_changes_pkt_data(insn->imm))
mark_subprog_changes_pkt_data(env, t);
if (insn->imm == BPF_FUNC_tail_call)
visit_tailcall_insn(env, t);
if (insn->imm == BPF_FUNC_tail_call) {
ret = visit_tailcall_insn(env, t);
if (ret)
return ret;
}
} else if (insn->src_reg == BPF_PSEUDO_KFUNC_CALL) {
struct bpf_kfunc_call_arg_meta meta;