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| author | Michael Mullin <masmullin@gmail.com> | 2022-05-23 22:49:17 +0300 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2022-06-03 02:26:43 +0300 |
| commit | de4b4b94fad90f876ab12e87999109e31a1871b4 (patch) | |
| tree | 1b795412ac72bdd5858073682f4b274b6d93d629 /tools | |
| parent | eb7b36ce47f830a01ad9405e673b563cc3638d5d (diff) | |
| download | linux-de4b4b94fad90f876ab12e87999109e31a1871b4.tar.xz | |
bpftool: Check for NULL ptr of btf in codegen_asserts
bpf_object__btf() can return a NULL value. If bpf_object__btf returns
null, do not progress through codegen_asserts(). This avoids a null ptr
dereference at the call btf__type_cnt() in the function find_type_for_map()
Signed-off-by: Michael Mullin <masmullin@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220523194917.igkgorco42537arb@jup
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/bpf/bpftool/gen.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c index 4c9477ff748d..f158dc1c2149 100644 --- a/tools/bpf/bpftool/gen.c +++ b/tools/bpf/bpftool/gen.c @@ -474,6 +474,9 @@ static void codegen_asserts(struct bpf_object *obj, const char *obj_name) const struct btf_type *sec; char map_ident[256], var_ident[256]; + if (!btf) + return; + codegen("\ \n\ __attribute__((unused)) static void \n\ |