syzbot

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WARNING: CPU: 1 PID: 3615 at net/core/dev.c:6357 netif_napi_add_weight+0x7e8/0x9e0 net/core/dev.c:6357
Modules linked in:
CPU: 1 PID: 3615 Comm: syz-executor302 Not tainted 5.19.0-rc3-syzkaller-00038-gca1fdab7fd27 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:netif_napi_add_weight+0x7e8/0x9e0 net/core/dev.c:6357
Code: b6 04 02 48 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 a4 00 00 00 48 8b 04 24 80 a0 b1 0b 00 00 fd e9 6c fd ff ff e8 78 20 27 fa <0f> 0b e9 60 fd ff ff e8 2c e4 73 fa e9 4c fe ff ff e8 12 e4 73 fa
RSP: 0018:ffffc90002fdfb18 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88801fc6a001 RCX: 0000000000000000
RDX: ffff8880257e8000 RSI: ffffffff87535508 RDI: 0000000000000001
RBP: ffff88801fc6a5d8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88801fc6a5e8
R13: ffff88801fc6a5d8 R14: ffff88801d6ecc80 R15: 0000000000000000
FS:  00007f79a62f3700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f79a62f3718 CR3: 000000001d926000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 netif_napi_add_tx_weight include/linux/netdevice.h:2559 [inline]
 netif_napi_add_tx include/linux/netdevice.h:2578 [inline]
 tun_napi_init drivers/net/tun.c:271 [inline]
 tun_attach.isra.0+0x1096/0x16c0 drivers/net/tun.c:812
 tun_net_init+0x45e/0x660 drivers/net/tun.c:993
 register_netdevice+0x57d/0x15b0 net/core/dev.c:9975
 tun_set_iff drivers/net/tun.c:2809 [inline]
 __tun_chr_ioctl+0x2a19/0x3da0 drivers/net/tun.c:3068
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f79a6362da9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f79a62f3308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f79a63ec438 RCX: 00007f79a6362da9
RDX: 0000000020000200 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007f79a63ec430 R08: 00007f79a62f3700 R09: 0000000000000000
R10: 00007f79a62f3700 R11: 0000000000000246 R12: 00007f79a63ec43c
R13: 00007f79a63b918c R14: 74656e2f7665642f R15: 0000000000022000
 </TASK>