[PATCH v4 2/2] tools/bpf/bpftool: Reset vmlinux BTF after struct_ops commands

[Yichong Chen]

struct_ops frees the global btf_vmlinux object.

In batch mode, a later struct_ops command can reuse stale state.

Reset the BTF pointer and cached map info state.

Fixes: 65c93628599d ("bpftool: Add struct_ops support")
Signed-off-by: Yichong Chen <chenyichong@xxxxxxxxxxxxx>
---
 tools/bpf/bpftool/struct_ops.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/bpf/bpftool/struct_ops.c b/tools/bpf/bpftool/struct_ops.c
index aa43dead249c..835e5e561f7f 100644
--- a/tools/bpf/bpftool/struct_ops.c
+++ b/tools/bpf/bpftool/struct_ops.c
@@ -643,6 +643,10 @@ int do_struct_ops(int argc, char **argv)
 	err = cmd_select(cmds, argc, argv, do_help);
 
 	btf__free(btf_vmlinux);
+	btf_vmlinux = NULL;
+	map_info_type = NULL;
+	map_info_alloc_len = 0;
+	map_info_type_id = 0;
 
 	return err;
 }
-- 
2.51.0