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Date:   Fri, 3 Sep 2021 18:03:02 +0200
From:   Maxime Ripard <maxime@cerno.tech>
To:     Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc:     Emma Anholt <emma@anholt.net>, David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        dri-devel <dri-devel@lists.freedesktop.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: Regression with mainline kernel on rpi4
Message-ID: <20210903160302.yh42vpkuob45dbpb@gilmour>
References: <CADVatmPB9-oKd=ypvj25UYysVo6EZhQ6bCM7EvztQBMyiZfAyw@mail.gmail.com>
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Hi Sudip,

On Thu, Sep 02, 2021 at 10:08:19AM +0100, Sudip Mukherjee wrote:
> Hi All,
>=20
> 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.
>=20
> [   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 =3D 0x96000004
> [   40.992233]   EC =3D 0x25: DABT (current EL), IL =3D 32 bits
> [   40.997699]   SET =3D 0, FnV =3D 0
> [   41.001205]   EA =3D 0, S1PTW =3D 0
> [   41.004428]   FSC =3D 0x04: level 0 translation fault
> [   41.009468] Data abort info:
> [   41.012410]   ISV =3D 0, ISS =3D 0x00000004
> [   41.016325]   CM =3D 0, WnR =3D 0
> [   41.019358] user pgtable: 4k pages, 48-bit VAs, pgdp=3D0000000042ae1000
> [   41.025926] [0000000000000348] pgd=3D0000000000000000, p4d=3D000000000=
0000000
> [   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 BTYP=
E=3D--)
> [   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: 000000000=
0000000
> [   41.159338] x26: 0000000000000000 x25: 000000000000ac44 x24: 000000002=
1002003
> [   41.166574] x23: ffff800012f73b40 x22: 0000000000000003 x21: ffff00005=
9400080
> [   41.173811] x20: ffff0000594004c8 x19: 0005833333380600 x18: 000000000=
0000000
> [   41.181047] x17: 0000000000000000 x16: 0000000000000000 x15: 000000000=
0000000
> [   41.188283] x14: 0000000000000000 x13: 0000000000000000 x12: 000000000=
0000991
> [   41.195520] x11: 0000000000000001 x10: 000000000001d4c0 x9 : ffff80000=
9047838
> [   41.202757] x8 : 0000000000000031 x7 : 000000000001d4c0 x6 : 000000000=
0000030
> [   41.209993] x5 : ffff800012f73a98 x4 : ffff80000905bb60 x3 : 000000001=
0624dd3
> [   41.217230] x2 : 00000000000003e8 x1 : 0000000000000000 x0 : 000000000=
0562200
> [   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 ]---
>=20
> You can see the complete dmesg at
> https://openqa.qa.codethink.co.uk/tests/76#step/dmesg/8

What test were you running?

Maxime

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