kernel: fmt
This commit is contained in:
ShirkNeko
448
kernel/sulog.c
448
kernel/sulog.c
@@ -30,340 +30,340 @@ static bool sulog_enabled __read_mostly = true;
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static int sulog_feature_get(u64 *value)
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{
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*value = sulog_enabled ? 1 : 0;
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return 0;
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*value = sulog_enabled ? 1 : 0;
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return 0;
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}
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static int sulog_feature_set(u64 value)
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{
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bool enable = value != 0;
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sulog_enabled = enable;
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pr_info("sulog: set to %d\n", enable);
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return 0;
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bool enable = value != 0;
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sulog_enabled = enable;
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pr_info("sulog: set to %d\n", enable);
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return 0;
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}
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static const struct ksu_feature_handler sulog_handler = {
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.feature_id = KSU_FEATURE_SULOG,
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.name = "sulog",
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.get_handler = sulog_feature_get,
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.set_handler = sulog_feature_set,
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.feature_id = KSU_FEATURE_SULOG,
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.name = "sulog",
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.get_handler = sulog_feature_get,
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.set_handler = sulog_feature_set,
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};
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static void get_timestamp(char *buf, size_t len)
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{
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struct timespec64 ts;
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struct tm tm;
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struct timespec64 ts;
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struct tm tm;
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ktime_get_real_ts64(&ts);
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time64_to_tm(ts.tv_sec - sys_tz.tz_minuteswest * 60, 0, &tm);
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ktime_get_real_ts64(&ts);
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time64_to_tm(ts.tv_sec - sys_tz.tz_minuteswest * 60, 0, &tm);
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snprintf(buf, len, "%04ld-%02d-%02d %02d:%02d:%02d",
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tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
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tm.tm_hour, tm.tm_min, tm.tm_sec);
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snprintf(buf, len, "%04ld-%02d-%02d %02d:%02d:%02d",
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tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
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tm.tm_hour, tm.tm_min, tm.tm_sec);
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}
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static void ksu_get_cmdline(char *full_comm, const char *comm, size_t buf_len)
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{
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if (!full_comm || buf_len <= 0)
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return;
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if (!full_comm || buf_len <= 0)
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return;
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if (comm && strlen(comm) > 0) {
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KSU_STRSCPY(full_comm, comm, buf_len);
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return;
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}
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if (comm && strlen(comm) > 0) {
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KSU_STRSCPY(full_comm, comm, buf_len);
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return;
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}
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if (in_atomic() || in_interrupt() || irqs_disabled()) {
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KSU_STRSCPY(full_comm, current->comm, buf_len);
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return;
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}
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if (in_atomic() || in_interrupt() || irqs_disabled()) {
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KSU_STRSCPY(full_comm, current->comm, buf_len);
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return;
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}
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if (!current->mm) {
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KSU_STRSCPY(full_comm, current->comm, buf_len);
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return;
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}
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if (!current->mm) {
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KSU_STRSCPY(full_comm, current->comm, buf_len);
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return;
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}
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int n = get_cmdline(current, full_comm, buf_len);
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if (n <= 0) {
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KSU_STRSCPY(full_comm, current->comm, buf_len);
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return;
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}
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int n = get_cmdline(current, full_comm, buf_len);
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if (n <= 0) {
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KSU_STRSCPY(full_comm, current->comm, buf_len);
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return;
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}
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for (int i = 0; i < n && i < buf_len - 1; i++) {
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if (full_comm[i] == '\0')
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full_comm[i] = ' ';
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}
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full_comm[n < buf_len ? n : buf_len - 1] = '\0';
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for (int i = 0; i < n && i < buf_len - 1; i++) {
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if (full_comm[i] == '\0')
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full_comm[i] = ' ';
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}
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full_comm[n < buf_len ? n : buf_len - 1] = '\0';
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}
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static void sanitize_string(char *str, size_t len)
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{
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if (!str || len == 0)
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return;
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size_t read_pos = 0, write_pos = 0;
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while (read_pos < len && str[read_pos] != '\0') {
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char c = str[read_pos];
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if (c == '\n' || c == '\r') {
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read_pos++;
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continue;
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}
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if (c == ' ' && write_pos > 0 && str[write_pos - 1] == ' ') {
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read_pos++;
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continue;
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}
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str[write_pos++] = c;
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read_pos++;
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}
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str[write_pos] = '\0';
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if (!str || len == 0)
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return;
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size_t read_pos = 0, write_pos = 0;
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while (read_pos < len && str[read_pos] != '\0') {
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char c = str[read_pos];
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if (c == '\n' || c == '\r') {
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read_pos++;
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continue;
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}
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if (c == ' ' && write_pos > 0 && str[write_pos - 1] == ' ') {
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read_pos++;
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continue;
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}
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str[write_pos++] = c;
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read_pos++;
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}
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str[write_pos] = '\0';
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}
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static bool dedup_should_print(uid_t uid, u8 type, const char *content, size_t len)
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{
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struct dedup_key key = {
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.crc = dedup_calc_hash(content, len),
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.uid = uid,
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.type = type,
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};
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u64 now = ktime_get_ns();
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u64 delta_ns = DEDUP_SECS * NSEC_PER_SEC;
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struct dedup_key key = {
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.crc = dedup_calc_hash(content, len),
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.uid = uid,
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.type = type,
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};
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u64 now = ktime_get_ns();
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u64 delta_ns = DEDUP_SECS * NSEC_PER_SEC;
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u32 idx = key.crc & (SULOG_COMM_LEN - 1);
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spin_lock(&dedup_lock);
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u32 idx = key.crc & (SULOG_COMM_LEN - 1);
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spin_lock(&dedup_lock);
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struct dedup_entry *e = &dedup_tbl[idx];
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if (e->key.crc == key.crc &&
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e->key.uid == key.uid &&
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e->key.type == key.type &&
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(now - e->ts_ns) < delta_ns) {
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spin_unlock(&dedup_lock);
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return false;
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}
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struct dedup_entry *e = &dedup_tbl[idx];
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if (e->key.crc == key.crc &&
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e->key.uid == key.uid &&
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e->key.type == key.type &&
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(now - e->ts_ns) < delta_ns) {
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spin_unlock(&dedup_lock);
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return false;
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}
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e->key = key;
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e->ts_ns = now;
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spin_unlock(&dedup_lock);
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return true;
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e->key = key;
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e->ts_ns = now;
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spin_unlock(&dedup_lock);
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return true;
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}
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static void sulog_work_handler(struct work_struct *work)
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{
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struct file *fp;
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struct sulog_entry *entry, *tmp;
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LIST_HEAD(local_queue);
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loff_t pos = 0;
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unsigned long flags;
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struct file *fp;
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struct sulog_entry *entry, *tmp;
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LIST_HEAD(local_queue);
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loff_t pos = 0;
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unsigned long flags;
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spin_lock_irqsave(&dedup_lock, flags);
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list_splice_init(&sulog_queue, &local_queue);
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spin_unlock_irqrestore(&dedup_lock, flags);
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spin_lock_irqsave(&dedup_lock, flags);
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list_splice_init(&sulog_queue, &local_queue);
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spin_unlock_irqrestore(&dedup_lock, flags);
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if (list_empty(&local_queue))
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return;
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if (list_empty(&local_queue))
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return;
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fp = ksu_filp_open_compat(SULOG_PATH, O_WRONLY | O_CREAT | O_APPEND, 0640);
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if (IS_ERR(fp)) {
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pr_err("sulog: failed to open log file: %ld\n", PTR_ERR(fp));
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goto cleanup;
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}
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fp = ksu_filp_open_compat(SULOG_PATH, O_WRONLY | O_CREAT | O_APPEND, 0640);
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if (IS_ERR(fp)) {
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pr_err("sulog: failed to open log file: %ld\n", PTR_ERR(fp));
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goto cleanup;
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}
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if (fp->f_inode->i_size > SULOG_MAX_SIZE) {
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if (vfs_truncate(&fp->f_path, 0))
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pr_err("sulog: failed to truncate log file\n");
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pos = 0;
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} else {
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pos = fp->f_inode->i_size;
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}
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if (fp->f_inode->i_size > SULOG_MAX_SIZE) {
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if (vfs_truncate(&fp->f_path, 0))
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pr_err("sulog: failed to truncate log file\n");
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pos = 0;
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} else {
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pos = fp->f_inode->i_size;
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}
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list_for_each_entry(entry, &local_queue, list)
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ksu_kernel_write_compat(fp, entry->content, strlen(entry->content), &pos);
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list_for_each_entry(entry, &local_queue, list)
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ksu_kernel_write_compat(fp, entry->content, strlen(entry->content), &pos);
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vfs_fsync(fp, 0);
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filp_close(fp, 0);
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vfs_fsync(fp, 0);
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filp_close(fp, 0);
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cleanup:
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list_for_each_entry_safe(entry, tmp, &local_queue, list) {
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list_del(&entry->list);
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kfree(entry);
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}
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list_for_each_entry_safe(entry, tmp, &local_queue, list) {
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list_del(&entry->list);
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kfree(entry);
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}
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}
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static void sulog_add_entry(char *log_buf, size_t len, uid_t uid, u8 dedup_type)
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{
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struct sulog_entry *entry;
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unsigned long flags;
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struct sulog_entry *entry;
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unsigned long flags;
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if (!sulog_enabled || !log_buf || len == 0)
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return;
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if (!sulog_enabled || !log_buf || len == 0)
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return;
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if (!dedup_should_print(uid, dedup_type, log_buf, len))
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return;
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if (!dedup_should_print(uid, dedup_type, log_buf, len))
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return;
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entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
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if (!entry)
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return;
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entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
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if (!entry)
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return;
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KSU_STRSCPY(entry->content, log_buf, SULOG_ENTRY_MAX_LEN);
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KSU_STRSCPY(entry->content, log_buf, SULOG_ENTRY_MAX_LEN);
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spin_lock_irqsave(&dedup_lock, flags);
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list_add_tail(&entry->list, &sulog_queue);
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spin_unlock_irqrestore(&dedup_lock, flags);
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spin_lock_irqsave(&dedup_lock, flags);
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list_add_tail(&entry->list, &sulog_queue);
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spin_unlock_irqrestore(&dedup_lock, flags);
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if (sulog_workqueue)
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queue_work(sulog_workqueue, &sulog_work);
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if (sulog_workqueue)
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queue_work(sulog_workqueue, &sulog_work);
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}
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void ksu_sulog_report_su_grant(uid_t uid, const char *comm, const char *method)
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{
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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if (!sulog_enabled)
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return;
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if (!sulog_enabled)
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return;
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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snprintf(log_buf, sizeof(log_buf),
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"[%s] SU_GRANT: UID=%d COMM=%s METHOD=%s PID=%d\n",
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timestamp, uid, full_comm, method ? method : "unknown", current->pid);
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snprintf(log_buf, sizeof(log_buf),
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"[%s] SU_GRANT: UID=%d COMM=%s METHOD=%s PID=%d\n",
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timestamp, uid, full_comm, method ? method : "unknown", current->pid);
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sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_SU_GRANT);
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sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_SU_GRANT);
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}
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void ksu_sulog_report_su_attempt(uid_t uid, const char *comm, const char *target_path, bool success)
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{
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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if (!sulog_enabled)
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return;
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if (!sulog_enabled)
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return;
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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snprintf(log_buf, sizeof(log_buf),
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"[%s] SU_EXEC: UID=%d COMM=%s TARGET=%s RESULT=%s PID=%d\n",
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timestamp, uid, full_comm, target_path ? target_path : "unknown",
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success ? "SUCCESS" : "DENIED", current->pid);
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snprintf(log_buf, sizeof(log_buf),
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"[%s] SU_EXEC: UID=%d COMM=%s TARGET=%s RESULT=%s PID=%d\n",
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timestamp, uid, full_comm, target_path ? target_path : "unknown",
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success ? "SUCCESS" : "DENIED", current->pid);
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sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_SU_ATTEMPT);
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sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_SU_ATTEMPT);
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}
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void ksu_sulog_report_permission_check(uid_t uid, const char *comm, bool allowed)
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{
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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if (!sulog_enabled)
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return;
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if (!sulog_enabled)
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return;
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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snprintf(log_buf, sizeof(log_buf),
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"[%s] PERM_CHECK: UID=%d COMM=%s RESULT=%s PID=%d\n",
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timestamp, uid, full_comm, allowed ? "ALLOWED" : "DENIED", current->pid);
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snprintf(log_buf, sizeof(log_buf),
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"[%s] PERM_CHECK: UID=%d COMM=%s RESULT=%s PID=%d\n",
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timestamp, uid, full_comm, allowed ? "ALLOWED" : "DENIED", current->pid);
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sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_PERM_CHECK);
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sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_PERM_CHECK);
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}
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void ksu_sulog_report_manager_operation(const char *operation, uid_t manager_uid, uid_t target_uid)
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{
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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char log_buf[SULOG_ENTRY_MAX_LEN];
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char timestamp[32];
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char full_comm[SULOG_COMM_LEN];
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if (!sulog_enabled)
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return;
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if (!sulog_enabled)
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return;
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|
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, NULL, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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get_timestamp(timestamp, sizeof(timestamp));
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ksu_get_cmdline(full_comm, NULL, sizeof(full_comm));
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sanitize_string(full_comm, sizeof(full_comm));
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snprintf(log_buf, sizeof(log_buf),
|
||||
"[%s] MANAGER_OP: OP=%s MANAGER_UID=%d TARGET_UID=%d COMM=%s PID=%d\n",
|
||||
timestamp, operation ? operation : "unknown", manager_uid, target_uid, full_comm, current->pid);
|
||||
snprintf(log_buf, sizeof(log_buf),
|
||||
"[%s] MANAGER_OP: OP=%s MANAGER_UID=%d TARGET_UID=%d COMM=%s PID=%d\n",
|
||||
timestamp, operation ? operation : "unknown", manager_uid, target_uid, full_comm, current->pid);
|
||||
|
||||
sulog_add_entry(log_buf, strlen(log_buf), manager_uid, DEDUP_MANAGER_OP);
|
||||
sulog_add_entry(log_buf, strlen(log_buf), manager_uid, DEDUP_MANAGER_OP);
|
||||
}
|
||||
|
||||
void ksu_sulog_report_syscall(uid_t uid, const char *comm, const char *syscall, const char *args)
|
||||
{
|
||||
char log_buf[SULOG_ENTRY_MAX_LEN];
|
||||
char timestamp[32];
|
||||
char full_comm[SULOG_COMM_LEN];
|
||||
char log_buf[SULOG_ENTRY_MAX_LEN];
|
||||
char timestamp[32];
|
||||
char full_comm[SULOG_COMM_LEN];
|
||||
|
||||
if (!sulog_enabled)
|
||||
return;
|
||||
if (!sulog_enabled)
|
||||
return;
|
||||
|
||||
get_timestamp(timestamp, sizeof(timestamp));
|
||||
ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
|
||||
|
||||
sanitize_string(full_comm, sizeof(full_comm));
|
||||
get_timestamp(timestamp, sizeof(timestamp));
|
||||
ksu_get_cmdline(full_comm, comm, sizeof(full_comm));
|
||||
|
||||
sanitize_string(full_comm, sizeof(full_comm));
|
||||
|
||||
snprintf(log_buf, sizeof(log_buf),
|
||||
"[%s] SYSCALL: UID=%d COMM=%s SYSCALL=%s ARGS=%s PID=%d\n",
|
||||
timestamp, uid, full_comm, syscall ? syscall : "unknown",
|
||||
args ? args : "none", current->pid);
|
||||
snprintf(log_buf, sizeof(log_buf),
|
||||
"[%s] SYSCALL: UID=%d COMM=%s SYSCALL=%s ARGS=%s PID=%d\n",
|
||||
timestamp, uid, full_comm, syscall ? syscall : "unknown",
|
||||
args ? args : "none", current->pid);
|
||||
|
||||
sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_SYSCALL);
|
||||
sulog_add_entry(log_buf, strlen(log_buf), uid, DEDUP_SYSCALL);
|
||||
}
|
||||
|
||||
int ksu_sulog_init(void)
|
||||
{
|
||||
if (ksu_register_feature_handler(&sulog_handler)) {
|
||||
pr_err("Failed to register sulog feature handler\n");
|
||||
}
|
||||
if (ksu_register_feature_handler(&sulog_handler)) {
|
||||
pr_err("Failed to register sulog feature handler\n");
|
||||
}
|
||||
|
||||
sulog_workqueue = alloc_workqueue("ksu_sulog", WQ_UNBOUND | WQ_HIGHPRI, 1);
|
||||
if (!sulog_workqueue) {
|
||||
pr_err("sulog: failed to create workqueue\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
sulog_workqueue = alloc_workqueue("ksu_sulog", WQ_UNBOUND | WQ_HIGHPRI, 1);
|
||||
if (!sulog_workqueue) {
|
||||
pr_err("sulog: failed to create workqueue\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
INIT_WORK(&sulog_work, sulog_work_handler);
|
||||
pr_info("sulog: initialized successfully\n");
|
||||
return 0;
|
||||
INIT_WORK(&sulog_work, sulog_work_handler);
|
||||
pr_info("sulog: initialized successfully\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
void ksu_sulog_exit(void)
|
||||
{
|
||||
struct sulog_entry *entry, *tmp;
|
||||
unsigned long flags;
|
||||
struct sulog_entry *entry, *tmp;
|
||||
unsigned long flags;
|
||||
|
||||
ksu_unregister_feature_handler(KSU_FEATURE_SULOG);
|
||||
ksu_unregister_feature_handler(KSU_FEATURE_SULOG);
|
||||
|
||||
sulog_enabled = false;
|
||||
sulog_enabled = false;
|
||||
|
||||
if (sulog_workqueue) {
|
||||
flush_workqueue(sulog_workqueue);
|
||||
destroy_workqueue(sulog_workqueue);
|
||||
sulog_workqueue = NULL;
|
||||
}
|
||||
if (sulog_workqueue) {
|
||||
flush_workqueue(sulog_workqueue);
|
||||
destroy_workqueue(sulog_workqueue);
|
||||
sulog_workqueue = NULL;
|
||||
}
|
||||
|
||||
spin_lock_irqsave(&dedup_lock, flags);
|
||||
list_for_each_entry_safe(entry, tmp, &sulog_queue, list) {
|
||||
list_del(&entry->list);
|
||||
kfree(entry);
|
||||
}
|
||||
spin_unlock_irqrestore(&dedup_lock, flags);
|
||||
spin_lock_irqsave(&dedup_lock, flags);
|
||||
list_for_each_entry_safe(entry, tmp, &sulog_queue, list) {
|
||||
list_del(&entry->list);
|
||||
kfree(entry);
|
||||
}
|
||||
spin_unlock_irqrestore(&dedup_lock, flags);
|
||||
|
||||
pr_info("sulog: cleaned up successfully\n");
|
||||
pr_info("sulog: cleaned up successfully\n");
|
||||
}
|
||||
|
||||
#endif // __SULOG_GATE
|
||||
|
||||
Reference in New Issue
Block a user