media: siano: Use scnprintf() for avoiding potential buffer overflow
Since snprintf() returns the would-be-output size instead of the actual output size, the succeeding calls may go beyond the given buffer limit. Fix it by replacing with scnprintf(). Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Takashi Iwai
Mauro Carvalho Chehab
parent
4345e2e5c7
commit
af72bc8cd6
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@ -45,88 +45,88 @@ static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
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buf = debug_data->stats_data;
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_rf_locked = %d\n", p->is_rf_locked);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_demod_locked = %d\n", p->is_demod_locked);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_external_lna_on = %d\n", p->is_external_lna_on);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"SNR = %d\n", p->SNR);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ber = %d\n", p->ber);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"FIB_CRC = %d\n", p->FIB_CRC);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ts_per = %d\n", p->ts_per);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"MFER = %d\n", p->MFER);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"RSSI = %d\n", p->RSSI);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"in_band_pwr = %d\n", p->in_band_pwr);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"carrier_offset = %d\n", p->carrier_offset);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\n", p->modem_state);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"frequency = %d\n", p->frequency);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"bandwidth = %d\n", p->bandwidth);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"transmission_mode = %d\n", p->transmission_mode);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\n", p->modem_state);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"guard_interval = %d\n", p->guard_interval);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"code_rate = %d\n", p->code_rate);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"lp_code_rate = %d\n", p->lp_code_rate);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"hierarchy = %d\n", p->hierarchy);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"constellation = %d\n", p->constellation);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"burst_size = %d\n", p->burst_size);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"burst_duration = %d\n", p->burst_duration);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"burst_cycle_time = %d\n", p->burst_cycle_time);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"calc_burst_cycle_time = %d\n",
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p->calc_burst_cycle_time);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_rows = %d\n", p->num_of_rows);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_padd_cols = %d\n", p->num_of_padd_cols);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_punct_cols = %d\n", p->num_of_punct_cols);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"error_ts_packets = %d\n", p->error_ts_packets);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"total_ts_packets = %d\n", p->total_ts_packets);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ber_error_count = %d\n", p->ber_error_count);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"ber_bit_count = %d\n", p->ber_bit_count);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"pre_ber = %d\n", p->pre_ber);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"cell_id = %d\n", p->cell_id);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_mpe_received = %d\n", p->num_mpe_received);
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debug_data->stats_count = n;
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@ -148,42 +148,42 @@ static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
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buf = debug_data->stats_data;
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"statistics_type = %d\t", p->statistics_type);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"full_size = %d\n", p->full_size);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_rf_locked = %d\t\t", p->is_rf_locked);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_demod_locked = %d\t", p->is_demod_locked);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_external_lna_on = %d\n", p->is_external_lna_on);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"SNR = %d dB\t\t", p->SNR);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"RSSI = %d dBm\t\t", p->RSSI);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"in_band_pwr = %d dBm\n", p->in_band_pwr);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"carrier_offset = %d\t", p->carrier_offset);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"bandwidth = %d\t\t", p->bandwidth);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"frequency = %d Hz\n", p->frequency);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"transmission_mode = %d\t", p->transmission_mode);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\t\t", p->modem_state);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"guard_interval = %d\n", p->guard_interval);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"system_type = %d\t\t", p->system_type);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"partial_reception = %d\t", p->partial_reception);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_layers = %d\n", p->num_of_layers);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
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for (i = 0; i < 3; i++) {
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@ -191,31 +191,34 @@ static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
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p->layer_info[i].number_of_segments > 13)
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continue;
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n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
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n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
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p->layer_info[i].code_rate);
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n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
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p->layer_info[i].constellation);
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n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
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p->layer_info[i].ber);
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n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\tber_error_count = %-5d\t",
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p->layer_info[i].ber_error_count);
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n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
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p->layer_info[i].ber_bit_count);
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n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
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p->layer_info[i].pre_ber);
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n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
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p->layer_info[i].ts_per);
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n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\terror_ts_packets = %-5d\t",
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p->layer_info[i].error_ts_packets);
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n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"total_ts_packets = %-5d\t",
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p->layer_info[i].total_ts_packets);
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n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
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p->layer_info[i].ti_ldepth_i);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"\tnumber_of_segments = %d\t",
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p->layer_info[i].number_of_segments);
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n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
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p->layer_info[i].tmcc_errors);
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}
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@ -238,44 +241,44 @@ static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
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buf = debug_data->stats_data;
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"statistics_type = %d\t", p->statistics_type);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"full_size = %d\n", p->full_size);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_rf_locked = %d\t\t", p->is_rf_locked);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_demod_locked = %d\t", p->is_demod_locked);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"is_external_lna_on = %d\n", p->is_external_lna_on);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"SNR = %d dB\t\t", p->SNR);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"RSSI = %d dBm\t\t", p->RSSI);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"in_band_pwr = %d dBm\n", p->in_band_pwr);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"carrier_offset = %d\t", p->carrier_offset);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"bandwidth = %d\t\t", p->bandwidth);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"frequency = %d Hz\n", p->frequency);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"transmission_mode = %d\t", p->transmission_mode);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"modem_state = %d\t\t", p->modem_state);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"guard_interval = %d\n", p->guard_interval);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"system_type = %d\t\t", p->system_type);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"partial_reception = %d\t", p->partial_reception);
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n += snprintf(&buf[n], PAGE_SIZE - n,
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n += scnprintf(&buf[n], PAGE_SIZE - n,
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"num_of_layers = %d\n", p->num_of_layers);
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n += snprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
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p->segment_number);
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n += snprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
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p->tune_bw);
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for (i = 0; i < 3; i++) {
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@ -283,31 +286,34 @@ static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
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p->layer_info[i].number_of_segments > 13)
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continue;
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n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
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n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
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n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
|
||||
p->layer_info[i].code_rate);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
|
||||
p->layer_info[i].constellation);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
|
||||
p->layer_info[i].ber);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "\tber_error_count = %-5d\t",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n,
|
||||
"\tber_error_count = %-5d\t",
|
||||
p->layer_info[i].ber_error_count);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
|
||||
p->layer_info[i].ber_bit_count);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
|
||||
p->layer_info[i].pre_ber);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
|
||||
p->layer_info[i].ts_per);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "\terror_ts_packets = %-5d\t",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n,
|
||||
"\terror_ts_packets = %-5d\t",
|
||||
p->layer_info[i].error_ts_packets);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %-5d\t",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n,
|
||||
"total_ts_packets = %-5d\t",
|
||||
p->layer_info[i].total_ts_packets);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
|
||||
p->layer_info[i].ti_ldepth_i);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n,
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n,
|
||||
"\tnumber_of_segments = %d\t",
|
||||
p->layer_info[i].number_of_segments);
|
||||
n += snprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
|
||||
n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
|
||||
p->layer_info[i].tmcc_errors);
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue