------------[ cut here ]------------ RTNL: assertion failed at ./include/net/netdev_lock.h (72) WARNING: ./include/net/netdev_lock.h:72 at netdev_assert_locked_ops_compat include/net/netdev_lock.h:72 [inline], CPU#0: syz.4.914/9698 WARNING: ./include/net/netdev_lock.h:72 at netdev_queue_get_dma_dev+0x480/0x4ac net/core/netdev_queues.c:43, CPU#0: syz.4.914/9698 Modules linked in: CPU: 0 UID: 0 PID: 9698 Comm: syz.4.914 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : netdev_assert_locked_ops_compat include/net/netdev_lock.h:72 [inline] pc : netdev_queue_get_dma_dev+0x480/0x4ac net/core/netdev_queues.c:43 lr : netdev_assert_locked_ops_compat include/net/netdev_lock.h:72 [inline] lr : netdev_queue_get_dma_dev+0x480/0x4ac net/core/netdev_queues.c:43 sp : ffff8000970c7880 x29: ffff8000970c7880 x28: 1fffe0001920b995 x27: dfff800000000000 x26: ffff700012e18f1c x25: 0000000000000000 x24: 0000000000000000 x23: dfff800000000000 x22: ffff80008a189000 x21: 0000000000000000 x20: ffff0000f168e000 x19: 0000000000000000 x18: 0000000000000000 x17: ffff80008a7c2000 x16: 0000000000000003 x15: ffff80008a34bda0 x14: 0000000000000001 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000002 x9 : 8be1a120e67dff00 x8 : 8be1a120e67dff00 x7 : ffff80008048e8f8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f8870 x2 : 0000000100000000 x1 : ffff0000cdd61d40 x0 : 0000000000000000 Call trace: netdev_assert_locked_ops_compat include/net/netdev_lock.h:72 [inline] (P) netdev_queue_get_dma_dev+0x480/0x4ac net/core/netdev_queues.c:43 (P) zcrx_register_netdev+0x1b8/0x460 io_uring/zcrx.c:831 io_register_zcrx+0x7ac/0xa00 io_uring/zcrx.c:983 __io_uring_register io_uring/register.c:942 [inline] __do_sys_io_uring_register io_uring/register.c:1040 [inline] __se_sys_io_uring_register io_uring/register.c:1017 [inline] __arm64_sys_io_uring_register+0x810/0x1494 io_uring/register.c:1017 __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+0x64/0x260 arch/arm64/kernel/entry-common.c:738 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 irq event stamp: 1280 hardirqs last enabled at (1279): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (1279): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (1280): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (1258): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (1258): [] put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:251 [inline] softirqs last enabled at (1258): [] fpsimd_restore_current_state+0x39c/0x9c8 arch/arm64/kernel/fpsimd.c:1797 softirqs last disabled at (1256): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (1256): [] get_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:234 [inline] softirqs last disabled at (1256): [] fpsimd_restore_current_state+0x44/0x9c8 arch/arm64/kernel/fpsimd.c:1790 ---[ end trace 0000000000000000 ]---