Kernel WARNING noticed on arm64 db410c device while booting linux next 20200721 tag. Kernel BUGs followed by kernel WARNINGS noticed on this db410c device.
metadata: git branch: master git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git commit: de2e69cfe54a8f2ed4b75f09d3110c514f45d38e git describe: next-20200721 kernel-config: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/dragonboard-410c/lkf... build-location: http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/dragonboard-410c/lkf...
Crash log: [ 5.802135] ------------[ cut here ]------------ [ 5.802509] l12: supplied by regulator-dummy [ 5.805901] kernfs: can not remove 'supplier:regulator.14', no directory [ 5.810782] l12: Bringing 0uV into 1750000-1750000uV [ 5.814789] WARNING: CPU: 3 PID: 164 at /usr/src/kernel/fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0xb0/0xc0 [ 5.823085] l13: supplied by regulator-dummy [ 5.826334] Modules linked in: [ 5.826354] CPU: 3 PID: 164 Comm: kworker/3:2 Tainted: G W 5.8.0-rc6-next-20200721 #1 [ 5.826363] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT) [ 5.826378] Workqueue: rcu_gp srcu_invoke_callbacks [ 5.826396] pstate: 80000005 (Nzcv daif -PAN -UAO BTYPE=--) [ 5.826409] pc : kernfs_remove_by_name_ns+0xb0/0xc0 [ 5.836530] l13: Bringing 0uV into 1750000-1750000uV [ 5.840651] lr : kernfs_remove_by_name_ns+0xb0/0xc0 [ 5.840659] sp : ffff800014093be0 [ 5.840667] x29: ffff800014093be0 x28: 0000000000000000 [ 5.840688] x27: ffff8000101c42cc x26: ffff8000101c42cc [ 5.840708] x25: ffff8000129fee68 x24: ffff00003fcb7640 [ 5.845080] l14: supplied by regulator-dummy [ 5.852811] x23: ffff00003fcb76c0 x22: 0000000000000000 [ 5.852831] x21: ffff00003a5cb400 x20: 0000000000000000 [ 5.852851] x19: ffff00003a604018 x18: ffffffffffffffff [ 5.852875] x17: 0000000000000000 [ 5.859830] l14: Bringing 0uV into 1750000-1750000uV [ 5.864089] x16: 0000000000000000 [ 5.864102] x15: ffff800012720a88 x14: ffff800094093877 [ 5.864123] x13: ffff800014093885 x12: 0000000000000003 [ 5.864143] x11: 0000000005f5e0ff x10: 0000000000000000 [ 5.871315] l15: supplied by regulator-dummy [ 5.874505] x9 : ffff800012720a88 x8 : 0000000018bc90a0 [ 5.874526] x7 : 00000000b9433f15 x6 : ffff800014093820 [ 5.874546] x5 : ffff800012721000 x4 : 0000000000000003 [ 5.874566] x3 : 0000000000000004 x2 : 0000000000000201 [ 5.880082] l15: Bringing 0uV into 1750000-1750000uV [ 5.884311] x1 : b2684f8263e0e600 x0 : 0000000000000000 [ 5.884333] Call trace: [ 5.884346] kernfs_remove_by_name_ns+0xb0/0xc0 [ 5.884358] sysfs_remove_link+0x30/0x60 [ 5.884371] devlink_remove_symlinks+0xa8/0x138 [ 5.884382] device_del+0xf4/0x3c0 [ 5.890179] l16: supplied by regulator-dummy [ 5.893172] device_unregister+0x24/0x78 [ 5.893182] __device_link_free_srcu+0x64/0x70 [ 5.898780] l16: Bringing 0uV into 1750000-1750000uV [ 5.903762] srcu_invoke_callbacks+0x10c/0x1a0 [ 5.903773] process_one_work+0x2b0/0x768 [ 5.903783] worker_thread+0x48/0x498 [ 5.903795] kthread+0x158/0x168 [ 5.903806] ret_from_fork+0x10/0x1c [ 5.903815] irq event stamp: 18695 [ 5.909658] l17: supplied by regulator-dummy [ 5.913312] hardirqs last enabled at (18694): [<ffff800010083318>] el1_irq+0xd8/0x180 [ 5.913325] hardirqs last disabled at (18695): [<ffff8000100aaebc>] debug_exception_enter+0xac/0xe8 [ 5.913337] softirqs last enabled at (18614): [<ffff8000101c42cc>] srcu_invoke_callbacks+0xf4/0x1a0 [ 5.913349] softirqs last disabled at (18652): [<ffff8000101c42cc>] srcu_invoke_callbacks+0xf4/0x1a0 [ 5.913358] ---[ end trace 8fa12bb0128735e5 ]---
full test log, https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20200721/testrun...
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