diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/ima.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/ima.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/tools/testing/selftests/bpf/progs/ima.c b/tools/testing/selftests/bpf/progs/ima.c index 86b21aff4bc5..96060ff4ffc6 100644 --- a/tools/testing/selftests/bpf/progs/ima.c +++ b/tools/testing/selftests/bpf/progs/ima.c @@ -9,20 +9,37 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_tracing.h> -long ima_hash_ret = -1; -u64 ima_hash = 0; u32 monitored_pid = 0; +struct { + __uint(type, BPF_MAP_TYPE_RINGBUF); + __uint(max_entries, 1 << 12); +} ringbuf SEC(".maps"); + char _license[] SEC("license") = "GPL"; SEC("lsm.s/bprm_committed_creds") -int BPF_PROG(ima, struct linux_binprm *bprm) +void BPF_PROG(ima, struct linux_binprm *bprm) { - u32 pid = bpf_get_current_pid_tgid() >> 32; + u64 ima_hash = 0; + u64 *sample; + int ret; + u32 pid; + + pid = bpf_get_current_pid_tgid() >> 32; + if (pid == monitored_pid) { + ret = bpf_ima_inode_hash(bprm->file->f_inode, &ima_hash, + sizeof(ima_hash)); + if (ret < 0 || ima_hash == 0) + return; + + sample = bpf_ringbuf_reserve(&ringbuf, sizeof(u64), 0); + if (!sample) + return; - if (pid == monitored_pid) - ima_hash_ret = bpf_ima_inode_hash(bprm->file->f_inode, - &ima_hash, sizeof(ima_hash)); + *sample = ima_hash; + bpf_ringbuf_submit(sample, 0); + } - return 0; + return; } |