V4L2 oops when transcoding with Jellyfin #4920
Description
Describe the bug
Sometimes when I try to play something that requires transcoding it just hangs infinitely and the info attached in the logs below pops up in dmesg.
Steps to reproduce the behaviour
Try to transcode content in Jellyfin (nightly version) with the V4L2 encoder.
Device (s)
Raspberry Pi 4 Mod. B
System
cat /etc/rpi-issue:
Raspberry Pi reference 2022-01-28
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, fbe448ccdc995d295d24c7596e5f0ef62cc2488f, stage2
vcgencmd version:
Jan 20 2022 13:56:48
Copyright (c) 2012 Broadcom
version bd88f66f8952d34e4e0613a85c7a6d3da49e13e2 (clean) (release) (start)
uname -a:
Linux raspberrypi 5.10.92-v8+ #1514 SMP PREEMPT Mon Jan 17 17:39:38 GMT 2022 aarch64 GNU/Linux
Logs
[29319.203001] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008
[29319.211821] Mem abort info:
[29319.214835] ESR = 0x96000045
[29319.217906] EC = 0x25: DABT (current EL), IL = 32 bits
[29319.223491] SET = 0, FnV = 0
[29319.226581] EA = 0, S1PTW = 0
[29319.229731] Data abort info:
[29319.232690] ISV = 0, ISS = 0x00000045
[29319.236637] CM = 0, WnR = 1
[29319.239679] user pgtable: 4k pages, 39-bit VAs, pgdp=00000000b9962000
[29319.246141] [0000000000000008] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000
[29319.254863] Internal error: Oops: 96000045 [#1] PREEMPT SMP
[29319.260433] Modules linked in: xt_nat xt_tcpudp veth xt_conntrack xt_MASQUERADE nf_conntrack_netlink xt_addrtype nft_compat br_netfilter bridge nft_masq nft_counter nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nf_tables nfnetlink wireguard libchacha20poly1305 chacha_neon poly1305_neon ip6_udp_tunnel udp_tunnel libcurve25519_generic libblake2s libblake2s_generic libchacha overlay cfg80211 rfkill 8021q garp stp llc snd_soc_hdmi_codec vc4 cec v3d bcm2835_v4l2(C) drm_kms_helper gpu_sched videobuf2_vmalloc raspberrypi_hwmon bcm2835_codec(C) bcm2835_isp(C) v4l2_mem2mem bcm2835_mmal_vchiq(C) videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_common snd_soc_core snd_bcm2835(C) snd_compress snd_pcm_dmaengine snd_pcm i2c_brcmstb videodev snd_timer mc syscopyarea sysfillrect vc_sm_cma(C) snd sysimgblt fb_sys_fops rpivid_mem nvmem_rmem uio_pdrv_genirq uio aes_neon_bs aes_neon_blk crypto_simd cryptd drm fuse drm_panel_orientation_quirks backlight ip_tables x_tables ipv6
[29319.348081] CPU: 1 PID: 68476 Comm: ffmpeg Tainted: G C 5.10.92-v8+ #1514
[29319.356166] Hardware name: Raspberry Pi 4 Model B Rev 1.2 (DT)
[29319.361994] pstate: 20000005 (nzCv daif -PAN -UAO -TCO BTYPE=--)
[29319.368005] pc : vchiq_mmal_port_enable+0xd8/0x158 [bcm2835_mmal_vchiq]
[29319.374615] lr : vchiq_mmal_port_enable+0x114/0x158 [bcm2835_mmal_vchiq]
[29319.381309] sp : ffffffc0129dba80
[29319.384616] x29: ffffffc0129dba80 x28: 0000000000000002
[29319.389925] x27: dead000000000100 x26: dead000000000122
[29319.395232] x25: ffffff8046800220 x24: ffffff8046800008
[29319.400540] x23: ffffff8046800000 x22: ffffff8046800178
[29319.405849] x21: 0000000000000000 x20: 0000000000000000
[29319.411156] x19: ffffff8048256918 x18: 0000000000000011
[29319.416462] x17: 0000000000000000 x16: 0000000000000000
[29319.421769] x15: ffffffffffffffff x14: ffffffc010e1d178
[29319.427076] x13: ffffffc0929db7f7 x12: ffffffc0129db7fd
[29319.432383] x11: bcbcbcbcbcbcbcbc x10: ffffffc0129db7b0
[29319.437690] x9 : ffffffc0108f8a04 x8 : 00000000000000c9
[29319.442997] x7 : 0000000000000002 x6 : ffffffc0129db700
[29319.448304] x5 : 0000000000000000 x4 : 0000000000000001
[29319.453610] x3 : ffffff80462cd01c x2 : 5b4b840ceead0300
[29319.458917] x1 : 0000000000000000 x0 : 0000000000000000
[29319.464224] Call trace:
[29319.466669] vchiq_mmal_port_enable+0xd8/0x158 [bcm2835_mmal_vchiq]
[29319.472934] bcm2835_codec_start_streaming+0x214/0x408 [bcm2835_codec]
[29319.479460] vb2_start_streaming+0x74/0x160 [videobuf2_common]
[29319.485290] vb2_core_streamon+0x98/0x198 [videobuf2_common]
[29319.490946] vb2_streamon+0x24/0x78 [videobuf2_v4l2]
[29319.495909] v4l2_m2m_streamon+0x34/0x88 [v4l2_mem2mem]
[29319.501130] v4l2_m2m_ioctl_streamon+0x20/0x30 [v4l2_mem2mem]
[29319.506895] v4l_streamon+0x2c/0x38 [videodev]
[29319.511345] __video_do_ioctl+0x18c/0x3f0 [videodev]
[29319.516317] video_usercopy+0x154/0x618 [videodev]
[29319.521115] video_ioctl2+0x20/0x68 [videodev]
[29319.525565] v4l2_ioctl+0x48/0x68 [videodev]
[29319.529834] __arm64_sys_ioctl+0xb0/0xf0
[29319.533751] el0_svc_common.constprop.3+0xc0/0x1f8
[29319.538535] do_el0_svc+0x2c/0x98
[29319.541843] el0_svc+0x20/0x30
[29319.544890] el0_sync_handler+0x90/0xb8
[29319.548719] el0_sync+0x180/0x1c0
[29319.552030] Code: f2fbd5bb f2fbd5ba 1400000c a9400261 (f9000420)
[29319.558118] ---[ end trace a323116043d22061 ]---
[29344.094867] bcm2835-codec bcm2835-codec: Mutex fail