On Wed, 2022-04-06 at 16:25 +0200, Sebastian Fricke wrote: > [You don't often get email from sebastian.fricke@xxxxxxxxxxxxx. Learn > why this is important at > http://aka.ms/LearnAboutSenderIdentification.] > > Hello folks, > > I am currently developing a V4L2 driver with support on GStreamer, > for > that purpose I am mounting the GStreamer repository via NFS from my > development machine to the target ARM64 hardware. > > I just switched to the latest kernel and got a sudden hang up of my > system. > What I did was a rebase of the GStreamer repository and then I wanted > to > build it with ninja on the target, this failed with a segmentation > fault: > ``` > gstreamer| Configuring libgstreamer-1.0.so.0.2100.0-gdb.py using > configurat= > ion > Segmentation fault > FAILED: build.ninja=20 > /usr/local/bin/meson --internal regenerate > /home/user/gstreamer_crossbuild = > /home/user/gstreamer_crossbuild/build --backend ninja > ninja: error: rebuilding 'build.ninja': subcommand FAILED > ``` > > And on the kernel side I got a OOPS: > > ``` > [ 4595.193433] Unable to handle kernel NULL pointer dereference at > virtual = > address 0000000000000008 > [ 4595.194259] Mem abort info: > [ 4595.194518] ESR =3D 0x96000006 > [ 4595.194857] EC =3D 0x25: DABT (current EL), IL =3D 32 bits > [ 4595.195343] SET =3D 0, FnV =3D 0 > [ 4595.195622] EA =3D 0, S1PTW =3D 0 > [ 4595.195908] FSC =3D 0x06: level 2 translation fault > [ 4595.196348] Data abort info: > [ 4595.196610] ISV =3D 0, ISS =3D 0x00000006 > [ 4595.196958] CM =3D 0, WnR =3D 0 > [ 4595.197229] user pgtable: 4k pages, 48-bit VAs, > pgdp=3D000000000450a000 > [ 4595.197807] [0000000000000008] pgd=3D08000000f1812003, > p4d=3D08000000f18= > 12003, pud=3D08000000390bf003, pmd=3D0000000000000000 > [ 4595.198793] Internal error: Oops: 96000006 [#1] PREEMPT SMP > [ 4595.199300] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 > nfs loc= > kd grace fscache netfs iptable_nat nf_nat iptable_mangle bpfilter > iptable_f= > ilter btsdio ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 > xt_tcpudp= > xt_state xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 > nft_compa= > t nf_tables nfnetlink hantro_vpu(C) rockchip_vdec(C) hci_uart > v4l2_vp9 rock= > chip_rga v4l2_h264 btqca videobuf2_dma_contig brcmfmac > videobuf2_dma_sg v4l= > 2_mem2mem btrtl snd_soc_es8316 snd_soc_audio_graph_card > videobuf2_memops bt= > bcm snd_soc_hdmi_codec snd_soc_simple_card snd_soc_rockchip_i2s > snd_soc_spd= > if_tx brcmutil videobuf2_v4l2 snd_soc_simple_card_utils btintel > videobuf2_c= > ommon snd_soc_core bluetooth cfg80211 snd_pcm_dmaengine videodev > snd_pcm sn= > d_timer dw_hdmi_i2s_audio mc dw_hdmi_cec snd rfkill soundcore > cpufreq_dt su= > nrpc ip_tables x_tables autofs4 cls_cgroup panfrost drm_shmem_helper > gpu_sc= > hed rockchipdrm drm_cma_helper dw_hdmi dw_mipi_dsi analogix_dp > drm_dp_helpe= > r drm_kms_helper cec rc_core > [ 4595.199702] drm drm_panel_orientation_quirks realtek(E) > [ 4595.207759] CPU: 4 PID: 3716 Comm: meson Tainted: G C > E 5.1= > 8.0-rc1-rockpidebug2 #94 > [ 4595.208532] Hardware name: Radxa ROCK Pi 4B (DT) > [ 4595.208938] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS > BTYPE= > =3D--) > [ 4595.209552] pc : list_lru_add+0xd4/0x180 > [ 4595.209907] lr : list_lru_add+0x15c/0x180 > [ 4595.210263] sp : ffff80000b75bbf0 > [ 4595.210556] x29: ffff80000b75bbf0 x28: ffff000005cd9d80 x27: > ffff0000056= > 92a10 > [ 4595.211188] x26: 00000000000000f0 x25: ffff000001962000 x24: > ffff8000018= > d7a80 > [ 4595.211819] x23: 0000000000000000 x22: 0000000000000000 x21: > 00000000000= > 00000 > [ 4595.212449] x20: ffff0000078fdc80 x19: ffff000013be8808 x18: > 00000000000= > 000c0 > [ 4595.213080] x17: 0000000000000020 x16: fffffc0001028608 x15: > fffffc00010= > 28600 > [ 4595.213710] x14: 1600000000000000 x13: 0000000000000008 x12: > ffff0000f77= > df278 > [ 4595.214339] x11: 0000000000000000 x10: ffff0000f77df258 x9 : > ffff8000088= > 1f12c > [ 4595.214970] x8 : ffff000001bbd300 x7 : 00000000ecc07b31 x6 : > 00000000000= > 00001 > [ 4595.215600] x5 : ffff000001f04100 x4 : ffff80000b75bbb0 x3 : > 00000000000= > 00000 > [ 4595.216229] x2 : 0000000000000001 x1 : 0000000000000000 x0 : > 00000000000= > 00000 > [ 4595.216858] Call trace: > [ 4595.217077] list_lru_add+0xd4/0x180 I don't have an ARM64 system that I can use to decode this. Could you therefore please do me a favour and decode it for me? To do so, please install gdb on your system, and then run the following command: gdb -ex 'list *(list_lru_add+0xd4)' --batch vmlinux Thanks! Trond > -- Trond Myklebust Linux NFS client maintainer, Hammerspace trond.myklebust@xxxxxxxxxxxxxxx
