diff options
author | Takashi Iwai <tiwai@suse.de> | 2020-03-11 10:46:38 +0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-03-20 18:28:07 +0300 |
commit | af72bc8cd6ab32be2105129f05eb4502f45577df (patch) | |
tree | ff0556f4992b1c2f24e080d79afd32174bde2d2d /drivers/media | |
parent | 4345e2e5c75895232a17e6783e6233beadc650c4 (diff) | |
download | linux-af72bc8cd6ab32be2105129f05eb4502f45577df.tar.xz |
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>
Diffstat (limited to 'drivers/media')
-rw-r--r-- | drivers/media/common/siano/smsdvb-debugfs.c | 214 |
1 files changed, 110 insertions, 104 deletions
diff --git a/drivers/media/common/siano/smsdvb-debugfs.c b/drivers/media/common/siano/smsdvb-debugfs.c index c95d4583498e..8916bb644756 100644 --- a/drivers/media/common/siano/smsdvb-debugfs.c +++ b/drivers/media/common/siano/smsdvb-debugfs.c @@ -45,88 +45,88 @@ static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data, buf = debug_data->stats_data; - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_rf_locked = %d\n", p->is_rf_locked); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_demod_locked = %d\n", p->is_demod_locked); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_external_lna_on = %d\n", p->is_external_lna_on); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "SNR = %d\n", p->SNR); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "ber = %d\n", p->ber); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "FIB_CRC = %d\n", p->FIB_CRC); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "ts_per = %d\n", p->ts_per); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "MFER = %d\n", p->MFER); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "RSSI = %d\n", p->RSSI); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "in_band_pwr = %d\n", p->in_band_pwr); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "carrier_offset = %d\n", p->carrier_offset); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "modem_state = %d\n", p->modem_state); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "frequency = %d\n", p->frequency); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "bandwidth = %d\n", p->bandwidth); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "transmission_mode = %d\n", p->transmission_mode); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "modem_state = %d\n", p->modem_state); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "guard_interval = %d\n", p->guard_interval); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "code_rate = %d\n", p->code_rate); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "lp_code_rate = %d\n", p->lp_code_rate); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "hierarchy = %d\n", p->hierarchy); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n", p->constellation); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "burst_size = %d\n", p->burst_size); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "burst_duration = %d\n", p->burst_duration); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "burst_cycle_time = %d\n", p->burst_cycle_time); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "calc_burst_cycle_time = %d\n", p->calc_burst_cycle_time); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_rows = %d\n", p->num_of_rows); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_padd_cols = %d\n", p->num_of_padd_cols); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_punct_cols = %d\n", p->num_of_punct_cols); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "error_ts_packets = %d\n", p->error_ts_packets); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "total_ts_packets = %d\n", p->total_ts_packets); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_error_count = %d\n", p->ber_error_count); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %d\n", p->ber_bit_count); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "pre_ber = %d\n", p->pre_ber); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "cell_id = %d\n", p->cell_id); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_mpe_received = %d\n", p->num_mpe_received); debug_data->stats_count = n; @@ -148,42 +148,42 @@ static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data, buf = debug_data->stats_data; - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "statistics_type = %d\t", p->statistics_type); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "full_size = %d\n", p->full_size); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_rf_locked = %d\t\t", p->is_rf_locked); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_demod_locked = %d\t", p->is_demod_locked); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_external_lna_on = %d\n", p->is_external_lna_on); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "SNR = %d dB\t\t", p->SNR); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "RSSI = %d dBm\t\t", p->RSSI); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "in_band_pwr = %d dBm\n", p->in_band_pwr); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "carrier_offset = %d\t", p->carrier_offset); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "bandwidth = %d\t\t", p->bandwidth); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "frequency = %d Hz\n", p->frequency); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "transmission_mode = %d\t", p->transmission_mode); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "modem_state = %d\t\t", p->modem_state); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "guard_interval = %d\n", p->guard_interval); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "system_type = %d\t\t", p->system_type); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "partial_reception = %d\t", p->partial_reception); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_layers = %d\n", p->num_of_layers); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors); for (i = 0; i < 3; i++) { @@ -191,31 +191,34 @@ static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data, p->layer_info[i].number_of_segments > 13) continue; - n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i); - n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t", + n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i); + 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); } @@ -238,44 +241,44 @@ static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data, buf = debug_data->stats_data; - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "statistics_type = %d\t", p->statistics_type); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "full_size = %d\n", p->full_size); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_rf_locked = %d\t\t", p->is_rf_locked); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_demod_locked = %d\t", p->is_demod_locked); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "is_external_lna_on = %d\n", p->is_external_lna_on); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "SNR = %d dB\t\t", p->SNR); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "RSSI = %d dBm\t\t", p->RSSI); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "in_band_pwr = %d dBm\n", p->in_band_pwr); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "carrier_offset = %d\t", p->carrier_offset); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "bandwidth = %d\t\t", p->bandwidth); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "frequency = %d Hz\n", p->frequency); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "transmission_mode = %d\t", p->transmission_mode); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "modem_state = %d\t\t", p->modem_state); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "guard_interval = %d\n", p->guard_interval); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "system_type = %d\t\t", p->system_type); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "partial_reception = %d\t", p->partial_reception); - n += snprintf(&buf[n], PAGE_SIZE - n, + n += scnprintf(&buf[n], PAGE_SIZE - n, "num_of_layers = %d\n", p->num_of_layers); - n += snprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t", + n += scnprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t", p->segment_number); - n += snprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n", + n += scnprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n", p->tune_bw); for (i = 0; i < 3; i++) { @@ -283,31 +286,34 @@ static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data, p->layer_info[i].number_of_segments > 13) continue; - n += snprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i); - n += snprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t", + n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i); + 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); } |