Kernel panic after system booted

[ZhendanYang]

Summary:
kernel panic happened after system booted. Only happen on BYT, not found on UP2 and CNL.

[ 8.223585] sysfs: cannot create duplicate filename '/bus/platform/devices/bytcr_rt5651'
[ 8.223591] CPU: 2 PID: 248 Comm: systemd-udevd Not tainted 4.18.0+ #5
[ 8.223593] Hardware name: ADI Minnowboard Turbot D0 PLATFORM/MinnowBoard Turbot, BIOS MNW2MAX1.X64.0097.R01.1709211052 09/21/2017

[ 8.223594] Call Trace:
[ 8.223606] dump_stack+0x5c/0x7b
[ 8.223613] sysfs_warn_dup+0x56/0x70
[ 8.223617] sysfs_do_create_link_sd.isra.2+0x98/0xb0
[ 8.223622] bus_add_device+0x77/0x160
[ 8.223626] device_add+0x38c/0x620
[ 8.223630] ? _cond_resched+0x15/0x40
[ 8.223633] platform_device_add+0x10e/0x260

[ 8.223904] sof-audio sof-audio: free topology...
[ 8.223915] BUG: unable to handle kernel NULL pointer dereference at 00000000000000b0
[ 8.224013] PGD 0 P4D 0
[ 8.224048] Oops: 0000 [#1] SMP PTI
[ 8.224089] CPU: 2 PID: 248 Comm: systemd-udevd Not tainted 4.18.0+ #5
[ 8.224158] Hardware name: ADI Minnowboard Turbot D0 PLATFORM/MinnowBoard Turbot, BIOS MNW2MAX1.X64.0097.R01.1709211052 09/21/2017
[ 8.224294] RIP: 0010:snd_soc_tplg_component_remove+0x2e/0x3e0 [snd_soc_core]

[ 8.225265] Call Trace:
[ 8.225306] snd_sof_free_topology+0xc0/0xf0 [snd_sof]
[ 8.225370] sof_probe+0x397/0x3d0 [snd_sof]
[ 8.225423] platform_drv_probe+0x3a/0x90
[ 8.225470] ? driver_sysfs_add+0x75/0xd0
[ 8.225517] driver_probe_device+0x2fa/0x470
[ 8.225567] ? __driver_attach+0x100/0x100

Test env:
sof master:
sof tool:
kernel sof-dev:
tplg: test-ssp2-mclk-0-I2S-volume-s16le-s16le-48k-19200k-codec.tplg

I test with kernel sof-dev commit 1f6c9cf and found no kernel panic issue. So should be caused by Rander's patch. @RanderWang

Log:
dmesg-kernel.log

[RanderWang]

find root cause. It is caused by a strange usage of machine driver.

[plbossart]

What is the status of this bug and is anyone looking at it?

[ZhendanYang]

This issue can't be reproduced for a long time. I'll just close it.