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Date: Mon, 15 Aug 2022 19:57:41 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Tejun Heo <tj@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 5.18 0462/1095] bpf: Fix subprog names in stack traces. From: Alexei Starovoitov <ast@...nel.org> [ Upstream commit 9c7c48d6a1e2eb5192ad5294c1c4dbd42a88e88b ] The commit 7337224fc150 ("bpf: Improve the info.func_info and info.func_info_rec_size behavior") accidently made bpf_prog_ksym_set_name() conservative for bpf subprograms. Fixed it so instead of "bpf_prog_tag_F" the stack traces print "bpf_prog_tag_full_subprog_name". Fixes: 7337224fc150 ("bpf: Improve the info.func_info and info.func_info_rec_size behavior") Reported-by: Tejun Heo <tj@...nel.org> Signed-off-by: Alexei Starovoitov <ast@...nel.org> Signed-off-by: Andrii Nakryiko <andrii@...nel.org> Acked-by: Martin KaFai Lau <kafai@...com> Acked-by: Yonghong Song <yhs@...com> Link: https://lore.kernel.org/bpf/20220714211637.17150-1-alexei.starovoitov@gmail.com Signed-off-by: Sasha Levin <sashal@...nel.org> --- kernel/bpf/verifier.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index a6d3a8972355..f29aa357826c 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -13016,6 +13016,7 @@ static int jit_subprogs(struct bpf_verifier_env *env) /* Below members will be freed only at prog->aux */ func[i]->aux->btf = prog->aux->btf; func[i]->aux->func_info = prog->aux->func_info; + func[i]->aux->func_info_cnt = prog->aux->func_info_cnt; func[i]->aux->poke_tab = prog->aux->poke_tab; func[i]->aux->size_poke_tab = prog->aux->size_poke_tab; @@ -13028,9 +13029,6 @@ static int jit_subprogs(struct bpf_verifier_env *env) poke->aux = func[i]->aux; } - /* Use bpf_prog_F_tag to indicate functions in stack traces. - * Long term would need debug info to populate names - */ func[i]->aux->name[0] = 'F'; func[i]->aux->stack_depth = env->subprog_info[i].stack_depth; func[i]->jit_requested = 1; -- 2.35.1
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