[syzbot] linux-next boot error: WARNING in cpumask_next_wrap

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 1bd8b75fe6ad Add linux-next specific files for 20220927
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=109d3404880000
kernel config: https://syzkaller.appspot.com/x/.config?x=fab8618a7c989c9d
dashboard link: https://syzkaller.appspot.com/bug?extid=21da700f3c9f0bc40150
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/b150a04debdc/disk-1bd8b75f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2bf7d4b812bc/vmlinux-1bd8b75f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+21da70...@syzkaller.appspotmail.com

ACPI: button: Sleep Button [SLPF]
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=119)
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.
scsi host0: Virtio SCSI HBA
st: Version 20160209, fixed bufsize 32768, s/g segs 256
Rounding down aligned max_sectors from 4294967295 to 4294967288
db_root: cannot open: /etc/target
slram: not enough parameters.
ftl_cs: FTL header not found.
wireguard: WireGuard 1.0.0 loaded. See www.wireguard.com for information.
wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <Ja...@zx2c4.com>. All Rights Reserved.
eql: Equalizer2002: Simon Janes (si...@ncm.com) and David S. Miller (da...@redhat.com)
MACsec IEEE 802.1AE
tun: Universal TUN/TAP device driver, 1.6
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:110 cpu_max_bits_warn include/linux/cpumask.h:110 [inline]
WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:110 cpumask_check include/linux/cpumask.h:117 [inline]
WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:110 cpumask_next include/linux/cpumask.h:178 [inline]
WARNING: CPU: 0 PID: 1 at include/linux/cpumask.h:110 cpumask_next_wrap+0x139/0x1d0 lib/cpumask.c:27
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.0.0-rc7-next-20220927-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:110 [inline]
RIP: 0010:cpumask_check include/linux/cpumask.h:117 [inline]
RIP: 0010:cpumask_next include/linux/cpumask.h:178 [inline]
RIP: 0010:cpumask_next_wrap+0x139/0x1d0 lib/cpumask.c:27
Code: df e8 1b 07 3e f8 39 eb 77 64 e8 c2 0a 3e f8 41 8d 6c 24 01 89 de 89 ef e8 04 07 3e f8 39 dd 0f 82 54 ff ff ff e8 a7 0a 3e f8 <0f> 0b e9 48 ff ff ff e8 9b 0a 3e f8 48 c7 c2 00 ae e1 8d 48 b8 00
RSP: 0000:ffffc90000067920 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000
RDX: ffff88813fe50000 RSI: ffffffff893e3c59 RDI: 0000000000000004
RBP: 0000000000000002 R08: 0000000000000004 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000002 R15: ffffffff8de1ac10
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
virtnet_set_affinity+0x35a/0x750 drivers/net/virtio_net.c:2300
init_vqs drivers/net/virtio_net.c:3578 [inline]
init_vqs drivers/net/virtio_net.c:3564 [inline]
virtnet_probe+0x110f/0x2ea0 drivers/net/virtio_net.c:3868
virtio_dev_probe+0x577/0x870 drivers/virtio/virtio.c:305
call_driver_probe drivers/base/dd.c:560 [inline]
really_probe+0x249/0xb90 drivers/base/dd.c:639
__driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778
driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808
__driver_attach+0x1d0/0x550 drivers/base/dd.c:1190
bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:301
bus_add_driver+0x4c9/0x640 drivers/base/bus.c:618
driver_register+0x220/0x3a0 drivers/base/driver.c:246
virtio_net_driver_init+0x93/0xd2 drivers/net/virtio_net.c:4074
do_one_initcall+0x13d/0x780 init/main.c:1306
do_initcall_level init/main.c:1381 [inline]
do_initcalls init/main.c:1397 [inline]
do_basic_setup init/main.c:1416 [inline]
kernel_init_freeable+0x6ff/0x788 init/main.c:1636
kernel_init+0x1a/0x1d0 init/main.c:1524
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
</TASK>


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[Michael S. Tsirkin]

Also related to affinity things?
I wonder what does virtio do wrong?

[Tetsuo Handa]

#syz dup: WARNING in c_start