------------[ cut here ]------------
WARNING: CPU: 0 PID: 24619 at net/core/dev.c:9596 dev_index_reserve+0x104/0x210
Modules linked in:
CPU: 0 PID: 24619 Comm: syz-executor.5 Not tainted 6.6.0-rc4-syzkaller-g19af4a4ed414 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : dev_index_reserve+0x104/0x210
lr : dev_index_reserve+0x100/0x210
sp : ffff800096cd78e0
x29: ffff800096cd7930 x28: ffff0000d59480d0 x27: ffff0000d59480f8
x26: ffff0000d59480f0 x25: 1ffff00012d9af20 x24: 1ffff00012d9af1c
x23: dfff800000000000 x22: ffff00011ecaba80 x21: 00000000ffffffea
x20: ffff0000d59480e0 x19: ffff800096cd7900 x18: ffff0001b41d6bb8
x17: 0000000000000000 x16: ffff80008051f9c4 x15: 0000000000000001
x14: 1fffe0001ab29198 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000040000 x10: 0000000000001936 x9 : ffff800097519000
x8 : 0000000000001937 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff800084e04748
x2 : 0000000000000001 x1 : 00000000cd947d88 x0 : 0000000000000000
Call trace:
 dev_index_reserve+0x104/0x210
 register_netdevice+0x598/0x1074 net/core/dev.c:10084
 tun_set_iff+0x630/0xb0c drivers/net/tun.c:2850
 __tun_chr_ioctl+0x788/0x2af8 drivers/net/tun.c:3118
 tun_chr_ioctl+0x38/0x4c drivers/net/tun.c:3403
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x58/0x16c arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
irq event stamp: 872
hardirqs last  enabled at (871): [<ffff80008a716574>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (871): [<ffff80008a716574>] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194
hardirqs last disabled at (872): [<ffff80008a627820>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:436
softirqs last  enabled at (814): [<ffff800080033c54>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (812): [<ffff800080033c20>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---