diff options
| author | Leon Hwang <hffilwlqm@gmail.com> | 2023-09-12 23:04:42 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-09-12 13:06:12 -0700 |
| commit | e13b5f2f3ba3df1ca31824d2fdbd182250fa10c7 (patch) | |
| tree | 324fee63a59510365030d8588e5ff25733a9a580 /tools/testing/selftests/bpf/progs/tailcall_bpf2bpf_fentry.c | |
| parent | 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 (diff) | |
selftests/bpf: Add testcases for tailcall infinite loop fixing
Add 4 test cases to confirm the tailcall infinite loop bug has been fixed.
Like tailcall_bpf2bpf cases, do fentry/fexit on the bpf2bpf, and then
check the final count result.
tools/testing/selftests/bpf/test_progs -t tailcalls
226/13 tailcalls/tailcall_bpf2bpf_fentry:OK
226/14 tailcalls/tailcall_bpf2bpf_fexit:OK
226/15 tailcalls/tailcall_bpf2bpf_fentry_fexit:OK
226/16 tailcalls/tailcall_bpf2bpf_fentry_entry:OK
226 tailcalls:OK
Summary: 1/16 PASSED, 0 SKIPPED, 0 FAILED
Signed-off-by: Leon Hwang <hffilwlqm@gmail.com>
Link: https://lore.kernel.org/r/20230912150442.2009-4-hffilwlqm@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/progs/tailcall_bpf2bpf_fentry.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/tailcall_bpf2bpf_fentry.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf_fentry.c b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf_fentry.c new file mode 100644 index 000000000000..8436c6729167 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/tailcall_bpf2bpf_fentry.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright Leon Hwang */ + +#include "vmlinux.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +int count = 0; + +SEC("fentry/subprog_tail") +int BPF_PROG(fentry, struct sk_buff *skb) +{ + count++; + + return 0; +} + +char _license[] SEC("license") = "GPL"; |