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WARNING: CPU: 1 PID: 18470 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: 1 PID: 18470 Comm: syz-executor.0 Not tainted 6.6.0-rc6-syzkaller #0
Hardware name: ARM-Versatile Express
Backtrace: 
[<8181f400>] (dump_backtrace) from [<8181f4fc>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256)
 r7:00000000 r6:82622a04 r5:60000093 r4:81fb57a0
[<8181f4e4>] (show_stack) from [<8183c824>] (__dump_stack lib/dump_stack.c:88 [inline])
[<8181f4e4>] (show_stack) from [<8183c824>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106)
[<8183c7dc>] (dump_stack_lvl) from [<8183c848>] (dump_stack+0x18/0x1c lib/dump_stack.c:113)
 r5:00000000 r4:82854d14
[<8183c830>] (dump_stack) from [<8181ffa4>] (panic+0x120/0x374 kernel/panic.c:340)
[<8181fe84>] (panic) from [<80242e4c>] (check_panic_on_warn kernel/panic.c:236 [inline])
[<8181fe84>] (panic) from [<80242e4c>] (print_tainted+0x0/0xa0 kernel/panic.c:231)
 r3:8260c484 r2:00000001 r1:81f9e2a8 r0:81fa5e5c
 r7:81366ad4
[<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:eb47dd7c r5:84542f00 r4:00000000
[<80243148>] (warn_slowpath_fmt) from [<81366ad4>] (dev_index_reserve+0xe0/0xe4 net/core/dev.c:9600)
 r10:87d67900 r9:00000000 r8:00000000 r7:eb47de6c r6:884e6600 r5:825f1e2c
 r4:884e6600
[<813669f4>] (dev_index_reserve) from [<81378bec>] (register_netdevice+0x14c/0x5d0 net/core/dev.c:10088)
 r6:884e6600 r5:00000000 r4:844ce000
[<81378aa0>] (register_netdevice) from [<80c0a008>] (tun_set_iff drivers/net/tun.c:2850 [inline])
[<81378aa0>] (register_netdevice) from [<80c0a008>] (__tun_chr_ioctl drivers/net/tun.c:3118 [inline])
[<81378aa0>] (register_netdevice) from [<80c0a008>] (tun_chr_ioctl+0xeb4/0x16c4 drivers/net/tun.c:3403)
 r9:844cf000 r8:00000000 r6:20000200 r5:844ce680 r4:844ce000
[<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)
 r10:84542f00 r9:00000004 r8:87d67900 r7:20000200 r6:87d67901 r5:00000000
 r4:400454ca
[<804f15d8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66)
Exception stack(0xeb47dfa8 to 0xeb47dff0)
dfa0:                   00000000 00000000 00000004 400454ca 20000200 00000000
dfc0: 00000000 00000000 0014c2c0 00000036 7e9c132e 7e9c132f 003d0f00 76b150fc
dfe0: 76b14f08 76b14ef8 00016680 000509d0
 r10:00000036 r9:84542f00 r8:80200288 r7:00000036 r6:0014c2c0 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..