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WARNING: CPU: 0 PID: 8211 at net/core/dev.c:9600 dev_index_reserve+0xe0/0xe4 net/core/dev.c:9600
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 PID: 8211 Comm: syz-executor.1 Not tainted 6.6.0-rc5-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<8181f3e0>] (dump_backtrace) from [<8181f4dc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:82622a04 r5:60000093 r4:81fb57a0
[<8181f4c4>] (show_stack) from [<8183c804>] (__dump_stack lib/dump_stack.c:88 [inline])
[<8181f4c4>] (show_stack) from [<8183c804>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<8183c7bc>] (dump_stack_lvl) from [<8183c828>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000000 r4:82854d14
[<8183c810>] (dump_stack) from [<8181ff84>] (panic+0x120/0x374 kernel/panic.c:340)
[<8181fe64>] (panic) from [<80242e4c>] (check_panic_on_warn kernel/panic.c:236 [inline])
[<8181fe64>] (panic) from [<80242e4c>] (print_tainted+0x0/0xa0 kernel/panic.c:231)
 r3:8260c484 r2:00000001 r1:81f9e2a8 r0:81fa5e5c
 r7:81366acc
[<80242dd8>] (check_panic_on_warn) from [<80243040>] (__warn+0x7c/0x180 kernel/panic.c:673)
[<80242fc4>] (__warn) from [<802432bc>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:698)
 r8:00000009 r7:8214cbd4 r6:ee329d7c r5:846669c0 r4:00000000
[<80243148>] (warn_slowpath_fmt) from [<81366acc>] (dev_index_reserve+0xe0/0xe4 net/core/dev.c:9600)
 r10:88540f00 r9:00000000 r8:00000000 r7:ee329e6c r6:84630000 r5:ffa1fb85
 r4:84630000
[<813669ec>] (dev_index_reserve) from [<81378be4>] (register_netdevice+0x14c/0x5d0 net/core/dev.c:10088)
 r6:84630000 r5:00000000 r4:83e4e000
[<81378a98>] (register_netdevice) from [<80c0a008>] (tun_set_iff drivers/net/tun.c:2850 [inline])
[<81378a98>] (register_netdevice) from [<80c0a008>] (__tun_chr_ioctl drivers/net/tun.c:3118 [inline])
[<81378a98>] (register_netdevice) from [<80c0a008>] (tun_chr_ioctl+0xeb4/0x16c4 drivers/net/tun.c:3403)
 r9:83e4f000 r8:00000000 r6:20000200 r5:83e4e680 r4:83e4e000
[<80c09154>] (tun_chr_ioctl) from [<804f16f0>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80c09154>] (tun_chr_ioctl) from [<804f16f0>] (do_vfs_ioctl fs/ioctl.c:831 [inline])
[<80c09154>] (tun_chr_ioctl) from [<804f16f0>] (__do_sys_ioctl fs/ioctl.c:869 [inline])
[<80c09154>] (tun_chr_ioctl) from [<804f16f0>] (sys_ioctl+0x118/0xb5c fs/ioctl.c:857)
 r10:846669c0 r9:00000003 r8:88540f00 r7:20000200 r6:88540f01 r5:00000000
 r4:400454ca
[<804f15d8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xee329fa8 to 0xee329ff0)
9fa0:                   00000000 00000000 00000003 400454ca 20000200 00000000
9fc0: 00000000 00000000 0014c2c0 00000036 7e9f632e 7e9f632f 003d0f00 76b5d0fc
9fe0: 76b5cf08 76b5cef8 00016680 000509d0
 r10:00000036 r9:846669c0 r8:80200288 r7:00000036 r6:0014c2c0 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..