------------[ cut here ]------------ WARNING: CPU: 0 PID: 6646 at ./include/net/netdev_lock.h:17 netdev_assert_locked include/net/netdev_lock.h:17 [inline] WARNING: CPU: 0 PID: 6646 at ./include/net/netdev_lock.h:17 netdev_nl_dev_fill+0x6bc/0x860 net/core/netdev-genl.c:41 Modules linked in: CPU: 0 UID: 0 PID: 6646 Comm: syz.3.322 Not tainted 6.15.0-rc1-syzkaller-00412-g4e34a840613b #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:netdev_assert_locked include/net/netdev_lock.h:17 [inline] RIP: 0010:netdev_nl_dev_fill+0x6bc/0x860 net/core/netdev-genl.c:41 Code: 1c 24 44 29 eb 4c 89 e8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 4a 01 00 00 41 89 5d 00 31 c0 e9 4d fe ff ff e8 85 ec c3 f7 90 <0f> 0b 90 e9 2c fa ff ff e8 77 ec c3 f7 90 0f 0b 90 42 80 3c 3b 00 RSP: 0018:ffffc900040f6b20 EFLAGS: 00010287 RAX: ffffffff89ff68eb RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000c483000 RSI: 0000000000006ea2 RDI: 0000000000006ea3 RBP: ffffc900040f6c50 R08: ffffffff89ff630c R09: 1ffff1100ea209dc R10: dffffc0000000000 R11: ffffed100ea209dd R12: ffff88807be90000 R13: ffff888030630780 R14: ffff888030630780 R15: ffffc900040f6ca0 FS: 00007f06dcbf66c0(0000) GS:ffff888124fa5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc3006e56c0 CR3: 0000000029ef2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netdev_genl_dev_notify+0x1fb/0x450 net/core/netdev-genl.c:102 netdev_genl_netdevice_event+0x81/0xa0 net/core/netdev-genl.c:-1 notifier_call_chain+0x1a5/0x3f0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2264 [inline] call_netdevice_notifiers net/core/dev.c:2278 [inline] unregister_netdevice_many_notify+0x1572/0x2500 net/core/dev.c:12025 unregister_netdevice_many net/core/dev.c:12088 [inline] unregister_netdevice_queue+0x383/0x400 net/core/dev.c:11941 unregister_netdevice include/linux/netdevice.h:3373 [inline] nsim_destroy+0x21e/0x690 drivers/net/netdevsim/netdev.c:1064 __nsim_dev_port_del+0x14b/0x1b0 drivers/net/netdevsim/dev.c:1428 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline] nsim_dev_reload_destroy+0x28a/0x490 drivers/net/netdevsim/dev.c:1661 nsim_dev_reload_down+0x98/0xd0 drivers/net/netdevsim/dev.c:968 devlink_reload+0x1ac/0x8c0 net/devlink/dev.c:461 devlink_nl_reload_doit+0xa58/0xed0 net/devlink/dev.c:584 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb38/0xf00 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x208/0x480 net/netlink/af_netlink.c:2534 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x7f8/0x9a0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8c3/0xcd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:727 ____sys_sendmsg+0x523/0x860 net/socket.c:2566 ___sys_sendmsg net/socket.c:2620 [inline] __sys_sendmsg+0x271/0x360 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f06ded8e169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f06dcbf6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f06defb5fa0 RCX: 00007f06ded8e169 RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000008 RBP: 00007f06dee10a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f06defb5fa0 R15: 00007ffdd03fdb38