Subject: [syzbot] linux-next boot error: WARNING in workqueue_sysfs_register

From: syzbot <[email-masked]>
Date: Mon, 08 May 2023 21:45:46 -0700

Hello,

syzbot found the following issue on:

HEAD commit:    47cba14ce6fc Add linux-next specific files for 20230509
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17e063a8280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d1f55a88ec660cdb
dashboard link: https://syzkaller.appspot.com/bug?extid=5b06ded6a65536fa99c2
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0dff7f749545/disk-47cba14c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/238b578b8345/vmlinux-47cba14c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2909e3e79ac1/bzImage-47cba14c.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email-masked]

Asymmetric key parser 'x509' registered
Asymmetric key parser 'pkcs8' registered
Key type pkcs7_test registered
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 240)
io scheduler mq-deadline registered
io scheduler kyber registered
io scheduler bfq registered
input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
ACPI: button: Power Button [PWRF]
input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
ACPI: button: Sleep Button [SLPF]
ioatdma: Intel(R) QuickData Technology Driver 5.00
ACPI: \_SB_.LNKC: Enabled at IRQ 11
virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
ACPI: \_SB_.LNKD: Enabled at IRQ 10
virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
ACPI: \_SB_.LNKB: Enabled at IRQ 10
virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
N_HDLC line discipline registered with maxframe=4096
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
Non-volatile memory driver v1.3
Linux agpgart interface v0.103
ACPI: bus type drm_connector registered
[drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
[drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
Console: switching to colour frame buffer device 128x48
platform vkms: [drm] fb0: vkmsdrmfb frame buffer device
usbcore: registered new interface driver udl
brd: module loaded
loop: module loaded
zram: Added device: zram0
null_blk: disk nullb0 created
null_blk: module loaded
Guest personality initialized and is inactive
VMCI host device registered (name=vmci, major=10, minor=118)
Initialized host personality
usbcore: registered new interface driver rtsx_usb
usbcore: registered new interface driver viperboard
usbcore: registered new interface driver dln2
usbcore: registered new interface driver pn533_usb
nfcsim 0.2 initialized
usbcore: registered new interface driver port100
usbcore: registered new interface driver nfcmrvl
Loading iSCSI transport class v2.0-870.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at kernel/workqueue.c:5925 workqueue_sysfs_register+0x32c/0x3f0 kernel/workqueue.c:5925
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.4.0-rc1-next-20230509-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
RIP: 0010:workqueue_sysfs_register+0x32c/0x3f0 kernel/workqueue.c:5925
Code: b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 ac 00 00 00 49 c7 84 24 18 01 00 00 00 00 00 00 eb b1 e8 a4 d4 2f 00 <0f> 0b 41 be ea ff ff ff eb a2 4c 89 ff e8 a2 d3 82 00 e9 9b fe ff
RSP: 0000:ffffc90000067910 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000080000 RCX: 0000000000000000
RDX: ffff888140660000 RSI: ffffffff81546bac RDI: 0000000000000005
RBP: ffffc90000067a80 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000080000 R11: 0000000000000000 R12: ffff88801f7ed800
R13: 0000000000000008 R14: ffff88801f7ed960 R15: ffff88801f7ed9c0
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000c571000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 alloc_workqueue+0x637/0x1110 kernel/workqueue.c:4485
 scsi_host_alloc+0xd1f/0x11a0 drivers/scsi/hosts.c:513
 virtscsi_probe+0x206/0xc80 drivers/scsi/virtio_scsi.c:872
 virtio_dev_probe+0x57b/0x870 drivers/virtio/virtio.c:305
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x240/0xca0 drivers/base/dd.c:658
 __driver_probe_device+0x1df/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __driver_attach+0x271/0x570 drivers/base/dd.c:1216
 bus_for_each_dev+0x12a/0x1c0 drivers/base/bus.c:368
 bus_add_driver+0x2e9/0x640 drivers/base/bus.c:673
 driver_register+0x162/0x4a0 drivers/base/driver.c:246
 virtio_scsi_init+0x76/0x110 drivers/scsi/virtio_scsi.c:1019
 do_one_initcall+0x102/0x540 init/main.c:1246
 do_initcall_level init/main.c:1319 [inline]
 do_initcalls init/main.c:1335 [inline]
 do_basic_setup init/main.c:1354 [inline]
 kernel_init_freeable+0x5a4/0x890 init/main.c:1571
 kernel_init+0x1e/0x2c0 init/main.c:1462
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

---
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