From: Alexei Starovoitov ast@kernel.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@kernel.org Signed-off-by: Alexei Starovoitov ast@kernel.org Signed-off-by: Andrii Nakryiko andrii@kernel.org Acked-by: Martin KaFai Lau kafai@fb.com Acked-by: Yonghong Song yhs@fb.com Link: https://lore.kernel.org/bpf/20220714211637.17150-1-alexei.starovoitov@gmail.... Signed-off-by: Sasha Levin sashal@kernel.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 346d36c905a9..c8b534a498b3 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -12445,6 +12445,7 @@ 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;
@@ -12457,9 +12458,6 @@ 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;