[syzbot] [net?] WARNING: still has locks held in devl_lock

[syzbot <syzbot+35ccc77ab91141b6cf3a@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    e8e60d3ddd25 Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=17310725580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=375776a45e10c065
dashboard link: https://syzkaller.appspot.com/bug?extid=35ccc77ab91141b6cf3a
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ca9fd6dc9b6c/disk-e8e60d3d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/690b32d87cdf/vmlinux-e8e60d3d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/35db39da550c/Image-e8e60d3d.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+35ccc77ab91141b6cf3a@syzkaller.appspotmail.com

====================================
WARNING: syz.3.129/5297 still has locks held!
syzkaller #0 Not tainted
------------------------------------
locks held by syz.3.129/5297: 1, last CPU#1:
 #0: ffff0000d6879258 (&devlink->lock_key#5){+.+.}-{4:4}, at: devl_lock+0x24/0x34 net/devlink/core.c:308

stack backtrace:
CPU: 1 UID: 0 PID: 5297 Comm: syz.3.129 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_held_locks_bug+0x90/0x98 kernel/locking/lockdep.c:6848
 debug_check_no_locks_held+0x24/0x30 kernel/locking/lockdep.c:6856
 try_to_freeze include/linux/freezer.h:62 [inline]
 usermodehelper_read_trylock+0x1d8/0x294 kernel/umh.c:228
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:157 [inline]
 firmware_fallback_sysfs+0x158/0x930 drivers/base/firmware_loader/fallback.c:248
 _request_firmware+0xb34/0xf5c drivers/base/firmware_loader/main.c:898
 request_firmware+0x4c/0x70 drivers/base/firmware_loader/main.c:948
 devlink_compat_flash_update+0x134/0x27c net/devlink/dev.c:1248
 dev_ethtool+0x63c/0x1a78 net/ethtool/ioctl.c:3676
 dev_ioctl+0x284/0xc88 net/core/dev_ioctl.c:751
 sock_do_ioctl+0x198/0x254 net/socket.c:1339
 sock_ioctl+0x55c/0x7ec net/socket.c:1446
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606


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