[syzbot ci] Re: pull request: fixes for ovpn 2026-08-07

[syzbot ci <syzbot+cifb58fcbd8413e765@syzkaller.appspotmail.com>]

syzbot ci has tested the following series

[v1] pull request: fixes for ovpn 2026-08-07
https://lore.kernel.org/all/20260807002250.1817498-1-antonio@openvpn.net
* [PATCH net 1/4] ovpn: fix NULL dereference when killing missing key
* [PATCH net 2/4] ovpn: finish crypto callback cleanup before peer release
* [PATCH net 3/4] ovpn: run deferred work on a module-owned workqueue
* [PATCH net 4/4] ovpn: defer key slot crypto freeing to workqueue

and found the following issue:
WARNING in __alloc_workqueue

Full report is available here:
https://ci.syzbot.org/series/a46f06c7-f8d8-4053-a746-91498a46c290

***

WARNING in __alloc_workqueue

tree:      net
URL:       https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git
base:      594d905195024b228c962627ae5ae7c17bd582a4
arch:      amd64
compiler:  Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
config:    https://ci.syzbot.org/builds/cc426b49-07b7-496e-badf-5b0646780dd0/config

usbcore: registered new interface driver udl
bochs-drm 0000:00:01.0: vgaarb: deactivate vga console
[drm] Found bochs VGA, ID 0xb0c5.
[drm] Framebuffer size 16384 kB @ 0xfd000000, mmio @ 0xfebf0000.
[drm] Initialized bochs-drm 1.0.0 for 0000:00:01.0 on minor 2
bochs-drm 0000:00:01.0: [drm] fb1: bochs-drmdrmfb frame buffer device
usbcore: registered new interface driver gm12u320
usbcore: registered new interface driver gud
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=267)
Initialized host personality
usbcore: registered new interface driver rtsx_usb
lpc_ich 0000:00:1f.0: I/O space for GPIO uninitialized
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.
st: Version 20160209, fixed bufsize 32768, s/g segs 256
ACPI: \_SB_.GSIA: Enabled at IRQ 16
ahci 0000:00:1f.2: AHCI vers 0001.0000, 32 command slots, 1.5 Gbps, SATA mode
ahci 0000:00:1f.2: 6/6 ports implemented (port mask 0x3f)
ahci 0000:00:1f.2: flags: 64bit ncq only 
scsi host0: ahci
scsi host1: ahci
scsi host2: ahci
scsi host3: ahci
scsi host4: ahci
scsi host5: ahci
ata1: SATA max UDMA/133 abar m4096@0xfebf2000 port 0xfebf2100 irq 26 lpm-pol 1
ata2: SATA max UDMA/133 abar m4096@0xfebf2000 port 0xfebf2180 irq 26 lpm-pol 1
ata3: SATA max UDMA/133 abar m4096@0xfebf2000 port 0xfebf2200 irq 26 lpm-pol 1
ata4: SATA max UDMA/133 abar m4096@0xfebf2000 port 0xfebf2280 irq 26 lpm-pol 1
ata5: SATA max UDMA/133 abar m4096@0xfebf2000 port 0xfebf2300 irq 26 lpm-pol 1
ata6: SATA max UDMA/133 abar m4096@0xfebf2000 port 0xfebf2380 irq 26 lpm-pol 1
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 <Jason@zx2c4.com>. All Rights Reserved.
------------[ cut here ]------------
workqueue: ovpn is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU.
WARNING: kernel/workqueue.c:5852 at __alloc_workqueue+0x1cf5/0x2060, CPU#0: swapper/0/1
Modules linked in:
CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__alloc_workqueue+0x1cf8/0x2060
Code: 38 00 e9 59 f9 ff ff e8 46 96 38 00 e9 26 fb ff ff e8 3c 96 38 00 e9 a7 fb ff ff e8 32 96 38 00 48 8d 3d fb a1 cc 0e 4c 89 f6 <67> 48 0f b9 3a 81 cd 00 01 00 00 e9 a7 e5 ff ff e8 13 96 38 00 48
RSP: 0000:ffffc900000677a8 EFLAGS: 00010293
RAX: ffffffff818e8c5e RBX: 0000000000000000 RCX: ffff888102a95940
RDX: 0000000000000000 RSI: ffff88810c4cf570 RDI: ffffffff905b2e60
RBP: 0000000000000000 R08: ffff888102a95940 R09: 0000000000000002
R10: 0000000000000102 R11: 0000000000000000 R12: ffffc900000678c0
R13: ffff88810c4cf400 R14: ffff88810c4cf570 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88818d934000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 alloc_workqueue_noprof+0xe3/0x210
 ovpn_init+0x1b/0xb0
 do_one_initcall+0x250/0x870
 do_initcall_level+0x10a/0x1a0
 do_initcalls+0x59/0xa0
 kernel_init_freeable+0x29d/0x3e0
 kernel_init+0x1d/0x1d0
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>


***

If these findings have caused you to resend the series or submit a
separate fix, please add the following tag to your commit message:
  Tested-by: syzbot@syzkaller.appspotmail.com

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