Hey all, I'm running into a weird boot issue with 5.11.9 and I'm not even sure why, as it's a config option that I seem to be missing and/or a dependency isn't being properly declared. A full dmesg output of a failed boot can be found at https://dpaste.com/8B35ASEJU - problematic lines seem to start around 1277 (I'm copying and pasting in from a different log, but the results are the same, just different times.) Mar 24 23:14:29 c630 kernel: [ 9.785159] qcom,slim-ngd-ctrl 171c0000.slim: Failed to request RX dma channel Mar 24 23:14:29 c630 kernel: [ 9.785173] qcom,slim-ngd-ctrl 171c0000.slim: rx dma init failed Which then eventually leads to a NULL pointer dereference: Mar 24 23:14:29 c630 kernel: [ 12.029331] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000028 Mar 24 23:14:29 c630 kernel: [ 12.031582] Mem abort info: Mar 24 23:14:29 c630 kernel: [ 12.033938] ESR = 0x96000044 Mar 24 23:14:29 c630 kernel: [ 12.031582] Mem abort info: Mar 24 23:14:29 c630 kernel: [ 12.033938] ESR = 0x96000044 Mar 24 23:14:29 c630 kernel: [ 12.035302] EC = 0x25: DABT (current EL), IL = 32 bits Mar 24 23:14:29 c630 kernel: [ 12.036673] SET = 0, FnV = 0 Mar 24 23:14:29 c630 kernel: [ 12.038043] EA = 0, S1PTW = 0 Mar 24 23:14:29 c630 kernel: [ 12.035302] EC = 0x25: DABT (current EL), IL = 32 bits Mar 24 23:14:29 c630 kernel: [ 12.036673] SET = 0, FnV = 0 Mar 24 23:14:29 c630 kernel: [ 12.038043] EA = 0, S1PTW = 0 Mar 24 23:14:29 c630 kernel: [ 12.039587] Data abort info: Mar 24 23:14:29 c630 kernel: [ 12.040938] ISV = 0, ISS = 0x00000044 Mar 24 23:14:29 c630 kernel: [ 12.041898] CM = 0, WnR = 1 Mar 24 23:14:29 c630 kernel: [ 12.039587] Data abort info: Mar 24 23:14:29 c630 kernel: [ 12.040938] ISV = 0, ISS = 0x00000044 Mar 24 23:14:29 c630 kernel: [ 12.041898] CM = 0, WnR = 1 Mar 24 23:14:30 c630 kernel: [ 12.042771] user pgtable: 4k pages, 48-bit VAs, pgdp=000000010919d000 Mar 24 23:14:30 c630 kernel: [ 12.043658] [0000000000000028] pgd=0000000000000000, p4d=0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.044559] Internal error: Oops: 96000044 [#1] SMP Mar 24 23:14:30 c630 kernel: [ 12.045597] Modules linked in: q6asm_dai xt_tcpudp nft_compat q6routing bridge stp llc cpufreq_powersave cpufreq_ondemand cpufreq_userspace cpufreq_conservative nf_tables q6afe_dai q6asm q6adm q6dsp_common q6afe q6core nfnetlink wcd934x regmap_slimbus binfmt_misc nls_ascii nls_cp437 venus_enc vfat fat venus_dec videobuf2_dma_sg ath10k_snoc ath10k_core ath mac80211 uvcvideo hci_uart apr btqca btrtl videobuf2_vmalloc videobuf2_memops btbcm venus_core v4l2_mem2mem btintel videobuf2_v4l2 videobuf2_common videodev mc fastrpc bluetooth qrtr_smd snd_soc_sdm845 snd_soc_rt5663 snd_soc_qcom_common snd_soc_rl6231 soundwire_bus snd_soc_core snd_compress snd_pcm_dmaengine snd_pcm snd_timer snd ecdh_generic ecc soundcore qcom_spmi_adc5 qcom_spmi_temp_alarm qcom_vadc_common industrialio hid_multitouch joydev qcom_rng pm8941_pwrkey bfq qcom_q6v5_mss cfg80211 sg qcom_wdt qrtr ns rfkill libarc4 slim_qcom_ngd_ctrl evdev pdr_interface slimbus qcom_q6v5_pas qcom_pil_info qcom_common qcom_q6v5 qcom_sysmon Mar 24 23:14:30 c630 kernel: [ 12.045742] rmtfs_mem tcp_bbr sch_fq fuse configfs sunrpc efivarfs ip_tables x_tables autofs4 ext4 mbcache jbd2 raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c raid1 raid0 multipath linear md_mod qmi_helpers aes_ce_blk crypto_simd cryptd aes_ce_cipher crct10dif_ce ghash_ce gf128mul sha2_ce sha256_arm64 sha1_ce rtc_pm8xxx ti_sn65dsi86 msm mdt_loader llcc_qcom ocmem drm_kms_helper camcc_sdm845 panel_simple gpio_keys drm Mar 24 23:14:30 c630 kernel: [ 12.055839] CPU: 6 PID: 57 Comm: kworker/6:1 Not tainted 5.11.9 #1 Mar 24 23:14:30 c630 kernel: [ 12.057202] Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN33WW(V2.06) 06/ 4/2019 Mar 24 23:14:30 c630 kernel: [ 12.060191] Workqueue: events deferred_probe_work_func Mar 24 23:14:30 c630 kernel: [ 12.063238] pstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--) Mar 24 23:14:30 c630 kernel: [ 12.066290] pc : qcom_slim_ngd_xfer_msg+0x16c/0x638 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.069388] lr : qcom_slim_ngd_xfer_msg_sync+0x68/0xd8 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.072487] sp : ffff80001069b8f0 Mar 24 23:14:30 c630 kernel: [ 12.075574] x29: ffff80001069b8f0 x28: ffff40790a02e080 Mar 24 23:14:30 c630 kernel: [ 12.078685] x27: ffff800010333cc8 x26: ffff407880c2146c Mar 24 23:14:30 c630 kernel: [ 12.081781] x25: ffff80001069bb34 x24: ffff40790a02e378 Mar 24 23:14:30 c630 kernel: [ 12.084872] x23: 0000000000ff0000 x22: ffff4078803ee900 Mar 24 23:14:30 c630 kernel: [ 12.087948] x21: ffff40790a02f3a0 x20: 0000000000000028 Mar 24 23:14:30 c630 kernel: [ 12.091014] x19: ffff80001069baf0 x18: 0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.042771] user pgtable: 4k pages, 48-bit VAs, pgdp=000000010919d000 Mar 24 23:14:30 c630 kernel: [ 12.043658] [0000000000000028] pgd=0000000000000000, p4d=0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.044559] Internal error: Oops: 96000044 [#1] SMP Mar 24 23:14:30 c630 kernel: [ 12.045597] Modules linked in: q6asm_dai xt_tcpudp nft_compat q6routing bridge stp llc cpufreq_powersave cpufreq_ondemand cpufreq_userspace cpufreq_conservative nf_tables q6afe_dai q6asm q6adm q6dsp_common q6afe q6core nfnetlink wcd934x regmap_slimbus binfmt_misc nls_ascii nls_cp437 venus_enc vfat fat venus_dec videobuf2_dma_sg ath10k_snoc ath10k_core ath mac80211 uvcvideo hci_uart apr btqca btrtl videobuf2_vmalloc videobuf2_memops btbcm venus_core v4l2_mem2mem btintel videobuf2_v4l2 videobuf2_common videodev mc fastrpc bluetooth qrtr_smd snd_soc_sdm845 snd_soc_rt5663 snd_soc_qcom_common snd_soc_rl6231 soundwire_bus snd_soc_core snd_compress snd_pcm_dmaengine snd_pcm snd_timer snd ecdh_generic ecc soundcore qcom_spmi_adc5 qcom_spmi_temp_alarm qcom_vadc_common industrialio hid_multitouch joydev qcom_rng pm8941_pwrkey bfq qcom_q6v5_mss cfg80211 sg qcom_wdt qrtr ns rfkill libarc4 slim_qcom_ngd_ctrl evdev pdr_interface slimbus qcom_q6v5_pas qcom_pil_info qcom_common qcom_q6v5 qcom_sysmon Mar 24 23:14:30 c630 kernel: [ 12.045742] rmtfs_mem tcp_bbr sch_fq fuse configfs sunrpc efivarfs ip_tables x_tables autofs4 ext4 mbcache jbd2 raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq libcrc32c raid1 raid0 multipath linear md_mod qmi_helpers aes_ce_blk crypto_simd cryptd aes_ce_cipher crct10dif_ce ghash_ce gf128mul sha2_ce sha256_arm64 sha1_ce rtc_pm8xxx ti_sn65dsi86 msm mdt_loader llcc_qcom ocmem drm_kms_helper camcc_sdm845 panel_simple gpio_keys drm Mar 24 23:14:30 c630 kernel: [ 12.055839] CPU: 6 PID: 57 Comm: kworker/6:1 Not tainted 5.11.9 #1 Mar 24 23:14:30 c630 kernel: [ 12.057202] Hardware name: LENOVO 81JL/LNVNB161216, BIOS 9UCN33WW(V2.06) 06/ 4/2019 Mar 24 23:14:30 c630 kernel: [ 12.060191] Workqueue: events deferred_probe_work_func Mar 24 23:14:30 c630 kernel: [ 12.063238] pstate: 20400005 (nzCv daif +PAN -UAO -TCO BTYPE=--) Mar 24 23:14:30 c630 kernel: [ 12.066290] pc : qcom_slim_ngd_xfer_msg+0x16c/0x638 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.069388] lr : qcom_slim_ngd_xfer_msg_sync+0x68/0xd8 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.072487] sp : ffff80001069b8f0 Mar 24 23:14:30 c630 kernel: [ 12.075574] x29: ffff80001069b8f0 x28: ffff40790a02e080 Mar 24 23:14:30 c630 kernel: [ 12.078685] x27: ffff800010333cc8 x26: ffff407880c2146c Mar 24 23:14:30 c630 kernel: [ 12.081781] x25: ffff80001069bb34 x24: ffff40790a02e378 Mar 24 23:14:30 c630 kernel: [ 12.084872] x23: 0000000000ff0000 x22: ffff4078803ee900 Mar 24 23:14:30 c630 kernel: [ 12.087948] x21: ffff40790a02f3a0 x20: 0000000000000028 Mar 24 23:14:30 c630 kernel: [ 12.091014] x19: ffff80001069baf0 x18: 0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.094070] x17: 0000000000000000 x16: 0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.097115] x15: 0000000000000000 x14: 0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.100139] x13: 0000000000000003 x12: 0000000000000074 Mar 24 23:14:30 c630 kernel: [ 12.103137] x11: 071c71c71c71c71c x10: 0000000000000001 Mar 24 23:14:30 c630 kernel: [ 12.106111] x9 : ffffd84daaa42de8 x8 : 0000000000000220 Mar 24 23:14:30 c630 kernel: [ 12.109055] x7 : ffffffffffffffff x6 : ffff40788397a218 Mar 24 23:14:30 c630 kernel: [ 12.111971] x5 : 0000000000000000 x4 : ffff80001069b978 Mar 24 23:14:30 c630 kernel: [ 12.114869] x3 : 0000000000000000 x2 : 0000000000000028 Mar 24 23:14:30 c630 kernel: [ 12.117766] x1 : ffff40790a02e0b0 x0 : 000000000000000a Mar 24 23:14:30 c630 kernel: [ 12.120664] Call trace: Mar 24 23:14:30 c630 kernel: [ 12.123544] qcom_slim_ngd_xfer_msg+0x16c/0x638 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.126480] qcom_slim_ngd_xfer_msg_sync+0x68/0xd8 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.129408] qcom_slim_ngd_get_laddr+0xdc/0x278 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.132323] slim_device_alloc_laddr+0x60/0x178 [slimbus] Mar 24 23:14:30 c630 kernel: [ 12.135216] slim_device_probe+0x84/0xa0 [slimbus] Mar 24 23:14:30 c630 kernel: [ 12.138113] really_probe+0xf0/0x4d8 Mar 24 23:14:30 c630 kernel: [ 12.141010] driver_probe_device+0xfc/0x168 Mar 24 23:14:30 c630 kernel: [ 12.143908] __device_attach_driver+0x94/0x120 Mar 24 23:14:30 c630 kernel: [ 12.146818] bus_for_each_drv+0x80/0xd0 Mar 24 23:14:30 c630 kernel: [ 12.149705] __device_attach+0xf8/0x178 Mar 24 23:14:30 c630 kernel: [ 12.152570] device_initial_probe+0x1c/0x28 Mar 24 23:14:30 c630 kernel: [ 12.155413] bus_probe_device+0xa4/0xb0 Mar 24 23:14:30 c630 kernel: [ 12.158248] deferred_probe_work_func+0xa0/0xf0 Mar 24 23:14:30 c630 kernel: [ 12.161094] process_one_work+0x1e0/0x498 Mar 24 23:14:30 c630 kernel: [ 12.163954] worker_thread+0x158/0x4c0 Mar 24 23:14:30 c630 kernel: [ 12.166812] kthread+0x104/0x130 Mar 24 23:14:30 c630 kernel: [ 12.169676] ret_from_fork+0x10/0x34 Mar 24 23:14:30 c630 kernel: [ 12.172541] Code: 53103ef7 b9007fff 51000400 39000260 (b900029f) Mar 24 23:14:30 c630 kernel: [ 12.175415] ---[ end trace d5a10ca5a9f43b60 ]--- Mar 24 23:14:30 c630 kernel: [ 12.094070] x17: 0000000000000000 x16: 0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.097115] x15: 0000000000000000 x14: 0000000000000000 Mar 24 23:14:30 c630 kernel: [ 12.100139] x13: 0000000000000003 x12: 0000000000000074 Mar 24 23:14:30 c630 kernel: [ 12.103137] x11: 071c71c71c71c71c x10: 0000000000000001 Mar 24 23:14:30 c630 kernel: [ 12.106111] x9 : ffffd84daaa42de8 x8 : 0000000000000220 Mar 24 23:14:30 c630 kernel: [ 12.109055] x7 : ffffffffffffffff x6 : ffff40788397a218 Mar 24 23:14:30 c630 kernel: [ 12.111971] x5 : 0000000000000000 x4 : ffff80001069b978 Mar 24 23:14:30 c630 kernel: [ 12.114869] x3 : 0000000000000000 x2 : 0000000000000028 Mar 24 23:14:30 c630 kernel: [ 12.117766] x1 : ffff40790a02e0b0 x0 : 000000000000000a Mar 24 23:14:30 c630 kernel: [ 12.120664] Call trace: Mar 24 23:14:30 c630 kernel: [ 12.123544] qcom_slim_ngd_xfer_msg+0x16c/0x638 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.126480] qcom_slim_ngd_xfer_msg_sync+0x68/0xd8 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.129408] qcom_slim_ngd_get_laddr+0xdc/0x278 [slim_qcom_ngd_ctrl] Mar 24 23:14:30 c630 kernel: [ 12.132323] slim_device_alloc_laddr+0x60/0x178 [slimbus] Mar 24 23:14:30 c630 kernel: [ 12.135216] slim_device_probe+0x84/0xa0 [slimbus] Mar 24 23:14:30 c630 kernel: [ 12.138113] really_probe+0xf0/0x4d8 Mar 24 23:14:30 c630 kernel: [ 12.141010] driver_probe_device+0xfc/0x168 Mar 24 23:14:30 c630 kernel: [ 12.143908] __device_attach_driver+0x94/0x120 Mar 24 23:14:30 c630 kernel: [ 12.146818] bus_for_each_drv+0x80/0xd0 Mar 24 23:14:30 c630 kernel: [ 12.149705] __device_attach+0xf8/0x178 Mar 24 23:14:30 c630 kernel: [ 12.152570] device_initial_probe+0x1c/0x28 Mar 24 23:14:30 c630 kernel: [ 12.155413] bus_probe_device+0xa4/0xb0 Mar 24 23:14:30 c630 kernel: [ 12.158248] deferred_probe_work_func+0xa0/0xf0 Mar 24 23:14:30 c630 kernel: [ 12.161094] process_one_work+0x1e0/0x498 Mar 24 23:14:30 c630 kernel: [ 12.163954] worker_thread+0x158/0x4c0 Mar 24 23:14:30 c630 kernel: [ 12.166812] kthread+0x104/0x130 Mar 24 23:14:30 c630 kernel: [ 12.169676] ret_from_fork+0x10/0x34 Mar 24 23:14:30 c630 kernel: [ 12.172541] Code: 53103ef7 b9007fff 51000400 39000260 (b900029f) Mar 24 23:14:30 c630 kernel: [ 12.175415] ---[ end trace d5a10ca5a9f43b60 ]--- I did a diff of a working config (with 5.11.9) versus the config where the above happens, looking at differences between QCOM and DMA, and those can be found at https://pastebin.com/Z2LwDXeh (working config is "-", non-working config is "+") For giggles, I attempted to take the non-working config and make QCOM_BAM_DMA built-in, instead of module, assuming that maybe that was the issue, and see if that would at least work around the issue, but that did nothing. I tried talking about it a bit with bamse on IRC last night, but my skills aren't really up to snuff on this, and he asked which pointer is NULL, and I'm not sure; he also mentioned something about the return value of qcom_slim_ngd_init_dma() being ignored, so there's possibly an issue there as well. The configs themselves are/can be found at http://dpaste.com/6AEEDXX2D (working) and https://paste.ubuntu.com/p/cxSSYYQx4w - apologies for using pastebins all over the place, but some reported that what I was attempting to paste is too big. Essentially, the non-working config is closer to a distro defconfig, and mine is closer to the defconfig with a few extra bits that I would use in Kali. The kernel tree that I'm using is https://github.com/steev/linux-1.git branch is linux-5.11.y - this is the stable 5.11 tree, with the patches for c630 and flex 5g applied on top. --steev
