:::::: :::::: Manual check reason: "low confidence bisect report" :::::: Manual check reason: "low confidence static check first_new_problem: sound/soc/mediatek/common/mtk-btcvsd.c:365:13: warning: use of uninitialized value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value]" ::::::
BCC: [email protected] CC: [email protected] CC: [email protected] TO: Trevor Wu <[email protected]> CC: Mark Brown <[email protected]> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 69dac8e431af26173ca0a1ebc87054e01c585bcc commit: 6746cc858259985a945a07075a19ec4d24352407 ASoC: mediatek: mt8195: add platform driver date: 12 months ago :::::: branch date: 10 hours ago :::::: commit date: 12 months ago config: arm-randconfig-c002-20220810 (https://download.01.org/0day-ci/archive/20220813/[email protected]/config) compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6746cc858259985a945a07075a19ec4d24352407 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 6746cc858259985a945a07075a19ec4d24352407 # save the config file COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross ARCH=arm KBUILD_USERCFLAGS='-fanalyzer -Wno-error' If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <[email protected]> gcc-analyzer warnings: (new ones prefixed by >>) sound/soc/mediatek/common/mtk-btcvsd.c: In function 'mtk_btcvsd_read_from_bt': >> sound/soc/mediatek/common/mtk-btcvsd.c:365:13: warning: use of uninitialized >> value '<unknown>' [CWE-457] [-Wanalyzer-use-of-uninitialized-value] 365 | int pv; | ^~ 'mtk_btcvsd_snd_irq_handler': events 1-12 | | 481 | static irqreturn_t mtk_btcvsd_snd_irq_handler(int irq_id, void *dev) | | ^~~~~~~~~~~~~~~~~~~~~~~~~~ | | | | | (1) entry to 'mtk_btcvsd_snd_irq_handler' |...... | 500 | if (((control >> 31) & 1) == 0) { | | ~ | | | | | (2) following 'false' branch... |...... | 506 | if (packet_type >= BT_SCO_CVSD_MAX) { | | ~ | | | | | (3) ...to here | | (4) following 'false' branch (when 'packet_type <= 5')... |...... | 512 | packet_length = btsco_packet_info[packet_type][0]; | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | | | (5) ...to here |...... | 553 | if (bt->rx->state == BT_SCO_STATE_RUNNING || | | ~ | | | | | (6) following 'true' branch... | 554 | bt->rx->state == BT_SCO_STATE_ENDING) { | 555 | if (bt->rx->xrun) { | | ~~ | | | | | (7) ...to here |...... | 568 | if (!bt->rx->xrun && | | ~~~~~~~~~~~~~~~~~ | | | | | | | (10) following 'true' branch... | | (8) following 'true' branch... | 569 | (bt->rx->packet_w - bt->rx->packet_r <= | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | | | (9) ...to here | 570 | SCO_RX_PACKER_BUF_NUM - buf_cnt_rx)) { | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | 571 | mtk_btcvsd_read_from_bt(bt, | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | | | (11) ...to here | | (12) calling 'mtk_btcvsd_read_from_bt' from 'mtk_btcvsd_snd_irq_handler' | 572 | packet_type, | | ~~~~~~~~~~~~ | 573 | packet_length, | | ~~~~~~~~~~~~~~ | 574 | packet_num, | | ~~~~~~~~~~~ | 575 | buf_cnt_rx, | | ~~~~~~~~~~~ | 576 | control); | | ~~~~~~~~ | +--> 'mtk_btcvsd_read_from_bt': events 13-14 | | 357 | static int mtk_btcvsd_read_from_bt(struct mtk_btcvsd_snd *bt, | | ^~~~~~~~~~~~~~~~~~~~~~~ | | | | | (13) entry to 'mtk_btcvsd_read_from_bt' |...... | 365 | int pv; | | ~~ | | | | | (14) use of uninitialized value '<unknown>' here | -- sound/soc/mediatek/mt8195/mt8195-dai-etdm.c: In function 'mt8195_dai_etdm_parse_of': >> sound/soc/mediatek/mt8195/mt8195-dai-etdm.c:2499:13: warning: use of >> uninitialized value '<unknown>' [CWE-457] >> [-Wanalyzer-use-of-uninitialized-value] 2499 | u32 sel; | ^~~ 'mt8195_dai_etdm_parse_of': event 1 | | 2499 | u32 sel; | | ^~~ | | | | | (1) use of uninitialized value '<unknown>' here | vim +365 sound/soc/mediatek/common/mtk-btcvsd.c 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 356 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 357 static int mtk_btcvsd_read_from_bt(struct mtk_btcvsd_snd *bt, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 358 enum bt_sco_packet_len packet_type, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 359 unsigned int packet_length, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 360 unsigned int packet_num, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 361 unsigned int blk_size, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 362 unsigned int control) 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 363 { 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 364 unsigned int i; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 @365 int pv; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 366 u8 *src; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 367 unsigned int packet_buf_ofs; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 368 unsigned long flags; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 369 unsigned long connsys_addr_rx, ap_addr_rx; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 370 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 371 connsys_addr_rx = *bt->bt_reg_pkt_r; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 372 ap_addr_rx = (unsigned long)bt->bt_sram_bank2_base + 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 373 (connsys_addr_rx & 0xFFFF); 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 374 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 375 if (connsys_addr_rx == 0xdeadfeed) { 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 376 /* bt return 0xdeadfeed if read register during bt sleep */ 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 377 dev_warn(bt->dev, "%s(), connsys_addr_rx == 0xdeadfeed", 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 378 __func__); 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 379 return -EIO; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 380 } 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 381 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 382 src = (u8 *)ap_addr_rx; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 383 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 384 mtk_btcvsd_snd_data_transfer(BT_SCO_DIRECT_BT2ARM, src, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 385 bt->rx->temp_packet_buf, packet_length, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 386 packet_num); 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 387 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 388 spin_lock_irqsave(&bt->rx_lock, flags); 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 389 for (i = 0; i < blk_size; i++) { 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 390 packet_buf_ofs = (bt->rx->packet_w & SCO_RX_PACKET_MASK) * 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 391 bt->rx->packet_size; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 392 memcpy(bt->rx_packet_buf + packet_buf_ofs, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 393 bt->rx->temp_packet_buf + (SCO_RX_PLC_SIZE * i), 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 394 SCO_RX_PLC_SIZE); 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 395 if ((control & btsco_packet_valid_mask[packet_type][i]) == 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 396 btsco_packet_valid_mask[packet_type][i]) 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 397 pv = 1; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 398 else 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 399 pv = 0; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 400 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 401 packet_buf_ofs += SCO_RX_PLC_SIZE; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 402 memcpy(bt->rx_packet_buf + packet_buf_ofs, (void *)&pv, 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 403 SCO_CVSD_PACKET_VALID_SIZE); 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 404 bt->rx->packet_w++; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 405 } 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 406 spin_unlock_irqrestore(&bt->rx_lock, flags); 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 407 return 0; 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 408 } 4bd8597dc36c37 KaiChieh Chuang 2019-01-30 409 :::::: The code at line 365 was first introduced by commit :::::: 4bd8597dc36c376a2bb1ef2c72984615bdeb68de ASoC: mediatek: add btcvsd driver :::::: TO: KaiChieh Chuang <[email protected]> :::::: CC: Mark Brown <[email protected]> -- 0-DAY CI Kernel Test Service https://01.org/lkp _______________________________________________ kbuild mailing list -- [email protected] To unsubscribe send an email to [email protected]
