From: Feng Yang <[email protected]> Calling bpf_lwt_xmit_push_encap will not cause a crash when dst is missing.
Signed-off-by: Feng Yang <[email protected]> --- .../selftests/bpf/prog_tests/lwt_misc.c | 9 ++++++++ tools/testing/selftests/bpf/progs/lwt_misc.c | 22 +++++++++++++++++++ 2 files changed, 31 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/lwt_misc.c create mode 100644 tools/testing/selftests/bpf/progs/lwt_misc.c diff --git a/tools/testing/selftests/bpf/prog_tests/lwt_misc.c b/tools/testing/selftests/bpf/prog_tests/lwt_misc.c new file mode 100644 index 000000000000..6940fca38512 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/lwt_misc.c @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <test_progs.h> +#include "lwt_misc.skel.h" + +void test_lwt_misc(void) +{ + RUN_TESTS(lwt_misc); +} diff --git a/tools/testing/selftests/bpf/progs/lwt_misc.c b/tools/testing/selftests/bpf/progs/lwt_misc.c new file mode 100644 index 000000000000..aa638a4f2922 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/lwt_misc.c @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include "vmlinux.h" +#include <bpf/bpf_helpers.h> +#include "bpf_misc.h" + +SEC("lwt_xmit") +__success __retval(0) +int test_missing_dst_call_bpf_lwt_xmit_push_encap(struct __sk_buff *skb) +{ + struct iphdr iph; + + __builtin_memset(&iph, 0, sizeof(struct iphdr)); + iph.ihl = 5; + iph.version = 4; + + bpf_lwt_push_encap(skb, BPF_LWT_ENCAP_IP, &iph, sizeof(struct iphdr)); + + return 0; +} + +char _license[] SEC("license") = "GPL"; -- 2.43.0
