Regression with mainline kernel on rpi4

[Sudip Mukherjee]

Hi All,

Our last night's test on rpi4 had a nasty trace. The test was with
7c636d4d20f8 ("Merge tag 'dt-5.15' of
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc"). Previous test
was on 9e9fb7655ed5 ("Merge tag 'net-next-5.15' of
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next") and it
did not have this trace.

[   40.975161] Unable to handle kernel access to user memory outside
uaccess routines at virtual address 0000000000000348
[   40.986187] Mem abort info:
[   40.989062]   ESR = 0x96000004
[   40.992233]   EC = 0x25: DABT (current EL), IL = 32 bits
[   40.997699]   SET = 0, FnV = 0
[   41.001205]   EA = 0, S1PTW = 0
[   41.004428]   FSC = 0x04: level 0 translation fault
[   41.009468] Data abort info:
[   41.012410]   ISV = 0, ISS = 0x00000004
[   41.016325]   CM = 0, WnR = 0
[   41.019358] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000042ae1000
[   41.025926] [0000000000000348] pgd=0000000000000000, p4d=0000000000000000
[   41.032845] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[   41.038495] Modules linked in: overlay algif_hash algif_skcipher
af_alg bnep sch_fq_codel ppdev lp parport ip_tables x_tables autofs4
btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor xor_neon raid6_pq
libcrc32c raid1 raid0 multipath linear uas usb_storage
snd_soc_hdmi_codec btsdio brcmfmac brcmutil hci_uart btqca btrtl
bcm2835_v4l2(C) btbcm crct10dif_ce bcm2835_mmal_vchiq(C) btintel
raspberrypi_hwmon videobuf2_vmalloc videobuf2_memops bluetooth
videobuf2_v4l2 videobuf2_common cfg80211 ecdh_generic ecc vc4
drm_kms_helper videodev dwc2 cec snd_bcm2835(C) i2c_brcmstb udc_core
roles drm xhci_pci mc pwm_bcm2835 xhci_pci_renesas snd_soc_core
ac97_bus snd_pcm_dmaengine snd_pcm phy_generic snd_timer
uio_pdrv_genirq snd fb_sys_fops syscopyarea sysfillrect sysimgblt uio
aes_neon_bs aes_neon_blk crypto_simd cryptd
[   41.116584] CPU: 0 PID: 1569 Comm: pulseaudio Tainted: G         C
      5.14.0-7c636d4d20f8 #1
[   41.125494] Hardware name: Raspberry Pi 4 Model B (DT)
[   41.130699] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   41.137756] pc : vc4_hdmi_audio_prepare+0x3c0/0xba4 [vc4]
[   41.143256] lr : vc4_hdmi_audio_prepare+0x308/0xba4 [vc4]
[   41.148747] sp : ffff800012f73a50
[   41.152099] x29: ffff800012f73a50 x28: ffff0000562ecc00 x27: 0000000000000000
[   41.159338] x26: 0000000000000000 x25: 000000000000ac44 x24: 0000000021002003
[   41.166574] x23: ffff800012f73b40 x22: 0000000000000003 x21: ffff000059400080
[   41.173811] x20: ffff0000594004c8 x19: 0005833333380600 x18: 0000000000000000
[   41.181047] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
[   41.188283] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000991
[   41.195520] x11: 0000000000000001 x10: 000000000001d4c0 x9 : ffff800009047838
[   41.202757] x8 : 0000000000000031 x7 : 000000000001d4c0 x6 : 0000000000000030
[   41.209993] x5 : ffff800012f73a98 x4 : ffff80000905bb60 x3 : 0000000010624dd3
[   41.217230] x2 : 00000000000003e8 x1 : 0000000000000000 x0 : 0000000000562200
[   41.224466] Call trace:
[   41.226939]  vc4_hdmi_audio_prepare+0x3c0/0xba4 [vc4]
[   41.232080]  hdmi_codec_prepare+0xe8/0x1b0 [snd_soc_hdmi_codec]
[   41.238083]  snd_soc_pcm_dai_prepare+0x5c/0x10c [snd_soc_core]
[   41.244038]  soc_pcm_prepare+0x5c/0x130 [snd_soc_core]
[   41.249276]  snd_pcm_prepare+0x150/0x1f0 [snd_pcm]
[   41.254149]  snd_pcm_common_ioctl+0x1644/0x1d14 [snd_pcm]
[   41.259635]  snd_pcm_ioctl+0x3c/0x5c [snd_pcm]
[   41.264152]  __arm64_sys_ioctl+0xb4/0x100
[   41.268216]  invoke_syscall+0x50/0x120
[   41.272014]  el0_svc_common+0x18c/0x1a4
[   41.275899]  do_el0_svc+0x34/0x9c
[   41.279254]  el0_svc+0x2c/0xc0
[   41.282348]  el0t_64_sync_handler+0xa4/0x12c
[   41.286673]  el0t_64_sync+0x1a4/0x1a8
[   41.290385] Code: 52807d02 72a20c43 f9400421 9ba37c13 (f941a423)
[   41.296563] ---[ end trace dcfe08f10aaf6873 ]---

You can see the complete dmesg at
https://openqa.qa.codethink.co.uk/tests/76#step/dmesg/8

-- 
Regards
Sudip