8000 add ctime to security_file_open and fix variable type by AsafEitani · Pull Request #1167 · aquasecurity/tracee · GitHub
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add ctime to security_file_open and fix variable type #1167

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Merged
merged 2 commits into from
Dec 1, 2021
Merged

add ctime to security_file_open and fix variable type #1167

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a274f6e
add ctime to security_file_open and fix variable type
Nov 28, 2021
3706743
change return type of helper ctime to u64
Nov 29, 2021
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2 changes: 1 addition & 1 deletion tracee-ebpf/tracee/consts.go
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Original file line number Diff line number Diff line change
Expand Up @@ -953,7 +953,7 @@ var EventsIDToParams = map[int32][]external.ArgMeta{
CgroupMkdirEventID: {{Type: "u64", Name: "cgroup_id"}, {Type: "const char*", Name: "cgroup_path"}},
CgroupRmdirEventID: {{Type: "u64", Name: "cgroup_id"}, {Type: "const char*", Name: "cgroup_path"}},
SecurityBprmCheckEventID: {{Type: "const char*", Name: "pathname"}, {Type: "dev_t", Name: "dev"}, {Type: "unsigned long", Name: "inode"}},
SecurityFileOpenEventID: {{Type: "const char*", Name: "pathname"}, {Type: "int", Name: "flags"}, {Type: "dev_t", Name: "dev"}, {Type: "unsigned long", Name: "inode"}, {Type: "int", Name: "syscall"}},
SecurityFileOpenEventID: {{Type: "const char*", Name: "pathname"}, {Type: "int", Name: "flags"}, {Type: "dev_t", Name: "dev"}, {Type: "unsigned long", Name: "inode"}, {Type: "unsigned long", Name: "ctime"}, {Type: "int", Name: "syscall"}},
SecurityInodeUnlinkEventID: {{Type: "const char*", Name: "pathname"}},
SecuritySocketCreateEventID: {{Type: "int", Name: "family"}, {Type: "int", Name: "type"}, {Type: "int", Name: "protocol"}, {Type: "int", Name: "kern"}},
SecuritySocketListenEventID: {{Type: "int", Name: "sockfd"}, {Type: "struct sockaddr*", Name: "local_addr"}, {Type: "int", Name: "backlog"}},
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10 changes: 6 additions & 4 deletions tracee-ebpf/tracee/tracee.bpf.c
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Original file line number Diff line number Diff line change
Expand Up @@ -892,7 +892,7 @@ static __always_inline unsigned long get_inode_nr_from_file(struct file *file)
return READ_KERN(f_inode->i_ino);
}

static __always_inline unsigned long get_ctime_nanosec_from_file(struct file *file)
static __always_inline u64 get_ctime_nanosec_from_file(struct file *file)
{
struct inode *f_inode = READ_KERN(file->f_inode);
struct timespec64 ts = READ_KERN(f_inode->i_ctime);
Expand Down Expand Up @@ -2457,7 +2457,7 @@ int tracepoint__sched__sched_process_exec(struct bpf_raw_tracepoint_args *ctx)
struct file* file = get_file_ptr_from_bprm(bprm);
dev_t s_dev = get_dev_from_file(file);
unsigned long inode_nr = get_inode_nr_from_file(file);
unsigned long ctime = get_ctime_nanosec_from_file(file);
u64 ctime = get_ctime_nanosec_from_file(file);

// bprm->mm is null at this point (set by begin_new_exec()), and task->mm is already initialized
struct mm_struct *mm = get_mm_from_task(task);
Expand Down Expand Up @@ -2487,7 +2487,7 @@ int tracepoint__sched__sched_process_exec(struct bpf_raw_tracepoint_args *ctx)
save_to_submit_buf(&data, &s_dev, sizeof(dev_t), 4);
save_to_submit_buf(&data, &inode_nr, sizeof(unsigned long), 5);
save_to_submit_buf(&data, &invoked_from_kernel, sizeof(int), 6);
save_to_submit_buf(&data, &ctime, sizeof(unsigned long), 7);
save_to_submit_buf(&data, &ctime, sizeof(u64), 7);

return events_perf_submit(&data, SCHED_PROCESS_EXEC, 0);
}
Expand Down Expand Up @@ -2684,15 +2684,17 @@ int BPF_KPROBE(trace_security_file_open)
dev_t s_dev = get_dev_from_file(file);
unsigned long inode_nr = get_inode_nr_from_file(file);
void *file_path = get_path_str(GET_FIELD_ADDR(file->f_path));
u64 ctime = get_ctime_nanosec_from_file(file);

save_str_to_buf(&data, file_path, 0);
save_to_submit_buf(&data, (void*)GET_FIELD_ADDR(file->f_flags), sizeof(int), 1);
save_to_submit_buf(&data, &s_dev, sizeof(dev_t), 2);
save_to_submit_buf(&data, &inode_nr, sizeof(unsigned long), 3);
save_to_submit_buf(&data, &ctime, sizeof(u64), 4);
if (get_config(CONFIG_SHOW_SYSCALL)) {
syscall_data_t *sys = bpf_map_lookup_elem(&syscall_data_map, &data.context.host_tid);
if (sys) {
save_to_submit_buf(&data, (void*)&sys->id, sizeof(int), 4);
save_to_submit_buf(&data, (void*)&sys->id, sizeof(int), 5);
}
}

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