Package: bugs.debian.org Severity: important X-Debbugs-Cc: godsofficialmessen...@protonmail.com
Dear Maintainer, I am reporting an issue which has led to systemd going into uninterruptable sleep state D, causing programs like ps or pgrep to hang indefinitely and greatly lengthening the response time (20s+) for some commands, including SSHing in. SSH does eventually connect, and the lighthttpd server running is still accessible and serving on port 80 accessible from other computers, but endpoints utilizing hardware run into socket connection errors. Rebooting is not possible due to systemd uninterruptable sleep state D. The system runs 24/7 barring power outages, and before the error services were working OK. I've looked into similar issues reported by others but was unable to find anyone who found a solution to resolve either the systemd issue or the kernel issue. Upon checking dmesg output, a section exists instructing to cut the lines for reporting sake, detailing an issue with paging in kworker. The specific dmesg section copied verbatim is included below: [36622.166106] 8<--- cut here --- [36622.169189] Unable to handle kernel paging request at virtual address bcae1e8c when execute [36622.177584] [bcae1e8c] *pgd=0951a811, *pte=00000000, *ppte=00000000 [36622.183902] Internal error: Oops: 80000007 [#1] SMP ARM [36622.189153] Modules linked in: cfg80211 rfkill 8021q garp stp llc vc4 snd_soc_hdmi_codec drm_display_helper cec drm_dma_helper drm_kms_helper rtl2832_sdr r820t snd_soc_core binfmt_misc rtl2832 i2c_mux regmap_i2c dvb_usb_rtl28xxu dvb_usb_v2 dvb_core snd_compress snd_pcm_dmaengine bcm2835_codec(C) raspberrypi_hwmon snd_bcm2835(C) snd_pcm bcm2835_v4l2(C) v4l2_mem2mem bcm2835_isp(C) bcm2835_mmal_vchiq(C) videobuf2_vmalloc videobuf2_dma_contig videobuf2_memops raspberrypi_gpiomem videobuf2_v4l2 snd_timer videodev snd videobuf2_common mc vc_sm_cma(C) uio_pdrv_genirq uio drm fuse drm_panel_orientation_quirks backlight dm_mod ip_tables x_tables ipv6 i2c_bcm2835 fixed [36622.247853] CPU: 2 PID: 16772 Comm: kworker/2:1 Tainted: G C 6.6.31+rpt-rpi-v7 #1 Raspbian 1:6.6.31-1+rpt1 [36622.259022] Hardware name: BCM2835 [36622.262438] Workqueue: events output_poll_execute [drm_kms_helper] [36622.268780] PC is at 0xbcae1e8c [36622.271924] LR is at drm_helper_probe_detect_ctx+0x44/0x144 [drm_kms_helper] [36622.279104] pc : [<bcae1e8c>] lr : [<7f3f30a0>] psr: 40000013 [36622.285376] sp : bcadde8c ip : bcaddebc fp : 00000001 [36622.290605] r10: 00000000 r9 : aee39620 r8 : 81f768d8 [36622.295833] r7 : 00000001 r6 : 7f473914 r5 : aee39310 r4 : 00000000 [36622.302366] r3 : 00000000 r2 : ffffffe4 r1 : 00000000 r0 : bcadde98 [36622.308901] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [36622.316048] Control: 10c5383d Table: 037e806a DAC: 00000055 [36622.321801] Register r0 information: 2-page vmalloc region starting at 0xbcadc000 allocated at kernel_clone+0xac/0x3a8 [36622.332529] Register r1 information: NULL pointer [36622.337241] Register r2 information: non-paged memory [36622.342298] Register r3 information: NULL pointer [36622.347008] Register r4 information: NULL pointer [36622.351717] Register r5 information: slab kmalloc-4k start aee39000 pointer offset 784 size 4096 [36622.360532] Register r6 information: 17-page vmalloc region starting at 0x7f471000 allocated at load_module+0x6ec/0x1c58 [36622.371429] Register r7 information: non-paged memory [36622.376500] Register r8 information: slab kmalloc-2k start 81f76800 pointer offset 216 size 2048 [36622.385318] Register r9 information: slab kmalloc-4k start aee39000 pointer offset 1568 size 4096 [36622.394216] Register r10 information: NULL pointer [36622.399013] Register r11 information: non-paged memory [36622.404157] Register r12 information: 2-page vmalloc region starting at 0xbcadc000 allocated at kernel_clone+0xac/0x3a8 [36622.414963] Process kworker/2:1 (pid: 16772, stack limit = 0x3b0cb011) [36622.421499] Stack: (0xbcadde8c to 0xbcade000) [36622.425863] de80: 7f3f30a0 00000000 7f3f30a0 00000000 00000000 [36622.434054] dea0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 e5d4ddf7 [36622.442249] dec0: aee39310 81f769e8 81f76800 7f3f3d40 aee80000 00000000 aee806d0 00000000 [36622.450441] dee0: bcaddf4c 80b32a20 00000000 00000002 7f418cb0 7f418df8 00000000 81f76800 [36622.458631] df00: aee39310 e5d4ddf7 80b33258 8391bd00 81f769e8 814c7200 baaf2100 aee80000 [36622.466820] df20: 00000080 814c7205 00000000 8013af48 baaf2100 81103d40 baaf2120 8391bd00 [36622.475009] df40: baaf2100 81103d40 baaf2120 61c88647 8391bd2c aee80000 baaf2100 8013b8c4 [36622.483199] df60: baaf215c 81103d40 bc9e9ec8 8378afc0 aee80000 8013b62c 8391bd00 90808ac0 [36622.491388] df80: bc9e9ec8 00000000 00000000 80144488 8378afc0 801443a0 00000000 00000000 [36622.499578] dfa0: 00000000 00000000 00000000 8010011c 00000000 00000000 00000000 00000000 [36622.507774] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [36622.515965] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [36622.524170] drm_helper_probe_detect_ctx [drm_kms_helper] from 0xaee39310 [36622.531129] Code: bad PC value [36622.534240] ---[ end trace 0000000000000000 ]---
