6.6-stable review patch. If anyone has any objections, please let me know.
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From: Mykyta Yatsenko yatsenko@meta.com
[ Upstream commit 07651ccda9ff10a8ca427670cdd06ce2c8e4269c ]
Return prog's btf_id from bpf_prog_get_info_by_fd regardless of capable check. This patch enables scenario, when freplace program, running from user namespace, requires to query target prog's btf.
Signed-off-by: Mykyta Yatsenko yatsenko@meta.com Signed-off-by: Andrii Nakryiko andrii@kernel.org Acked-by: Yonghong Song yonghong.song@linux.dev Link: https://lore.kernel.org/bpf/20250317174039.161275-3-mykyta.yatsenko5@gmail.c... Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/bpf/syscall.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index f089a61630111..5a8c5a4ef1134 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -4442,6 +4442,8 @@ static int bpf_prog_get_info_by_fd(struct file *file, info.recursion_misses = stats.misses;
info.verified_insns = prog->aux->verified_insns; + if (prog->aux->btf) + info.btf_id = btf_obj_id(prog->aux->btf);
if (!bpf_capable()) { info.jited_prog_len = 0; @@ -4588,8 +4590,6 @@ static int bpf_prog_get_info_by_fd(struct file *file, } }
- if (prog->aux->btf) - info.btf_id = btf_obj_id(prog->aux->btf); info.attach_btf_id = prog->aux->attach_btf_id; if (attach_btf) info.attach_btf_obj_id = btf_obj_id(attach_btf);