TITLE: kernel BUG in free_netdev
TYPE: BUG
PANICKED: Y

[  429.970583][T14786] ------------[ cut here ]------------
[  430.011828][T14786] kernel BUG at net/core/dev.c:10648!
[  430.032257][T14786] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[  430.038420][T14786] CPU: 0 PID: 14786 Comm: syz-executor.2 Not tainted 5.11.0-rc3-next-20210114-syzkaller #0
[  430.048401][T14786] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  430.058465][T14786] RIP: 0010:free_netdev+0x4b3/0x5e0
[  430.063789][T14786] Code: c0 01 38 d0 7c 08 84 d2 0f 85 1a 01 00 00 0f b7 83 32 02 00 00 48 29 c3 48 89 df e8 97 1e a7 fa e9 47 ff ff ff e8 1d 8b 7a fa <0f> 0b e8 16 8b 7a fa 0f b6 2d 6d 5b f7 05 31 ff 89 ee e8 86 91 7a
[  430.083413][T14786] RSP: 0000:ffffc90001f9f1a0 EFLAGS: 00010206
[  430.089497][T14786] RAX: 0000000000012d70 RBX: ffff888011982000 RCX: ffffc9000cf41000
[  430.097484][T14786] RDX: 0000000000040000 RSI: ffffffff86f89cb3 RDI: 0000000000000003
[  430.105475][T14786] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
[  430.113463][T14786] R10: ffffffff86f89bd3 R11: 0000000000000003 R12: ffff888011981ef8
[  430.121467][T14786] R13: ffff888011982058 R14: dffffc0000000000 R15: ffff888011981ef8
[  430.129454][T14786] FS:  00007f3862fec700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000
[  430.138405][T14786] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  430.145102][T14786] CR2: 00007fe25dbdddb8 CR3: 0000000012e0c000 CR4: 00000000001506f0
[  430.153091][T14786] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  430.161087][T14786] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  430.169071][T14786] Call Trace:
[  430.172360][T14786]  __rtnl_newlink+0x1484/0x16e0
[  430.234297][T14786]  rtnl_newlink+0x64/0xa0
[  430.243683][T14786]  rtnetlink_rcv_msg+0x44e/0xad0
[  430.270808][T14786]  netlink_rcv_skb+0x153/0x420
[  430.297348][T14786]  netlink_unicast+0x533/0x7d0
[  430.335167][T14786]  netlink_sendmsg+0x856/0xd90
[  430.356122][T14786]  sock_sendmsg+0xcf/0x120
[  430.360639][T14786]  ____sys_sendmsg+0x6e8/0x810
[  430.380727][T14786]  ___sys_sendmsg+0xf3/0x170
[  430.420639][T14786]  __sys_sendmsg+0xe5/0x1b0
[  430.436118][T14786]  do_syscall_64+0x2d/0x70
[  430.440604][T14786]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  430.446511][T14786] RIP: 0033:0x45e219
[  430.450410][T14786] Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
[  430.470035][T14786] RSP: 002b:00007f3862febc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  430.478465][T14786] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219
[  430.486444][T14786] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004
[  430.494415][T14786] RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000
[  430.502395][T14786] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
[  430.510377][T14786] R13: 00007ffc34f6c59f R14: 00007f3862fec9c0 R15: 000000000119bf8c
[  430.518367][T14786] Modules linked in:
[  430.549456][T14786] ---[ end trace 71bdd65680946525 ]---
[  430.567612][T14786] RIP: 0010:free_netdev+0x4b3/0x5e0
[  430.582590][T14786] Code: c0 01 38 d0 7c 08 84 d2 0f 85 1a 01 00 00 0f b7 83 32 02 00 00 48 29 c3 48 89 df e8 97 1e a7 fa e9 47 ff ff ff e8 1d 8b 7a fa <0f> 0b e8 16 8b 7a fa 0f b6 2d 6d 5b f7 05 31 ff 89 ee e8 86 91 7a
[  430.604500][T14786] RSP: 0000:ffffc90001f9f1a0 EFLAGS: 00010206
[  430.662348][T14786] RAX: 0000000000012d70 RBX: ffff888011982000 RCX: ffffc9000cf41000
[  430.744921][T14786] RDX: 0000000000040000 RSI: ffffffff86f89cb3 RDI: 0000000000000003
[  430.752938][T14786] RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001
[  430.803784][T14786] R10: ffffffff86f89bd3 R11: 0000000000000003 R12: ffff888011981ef8
[  430.832577][T14786] R13: ffff888011982058 R14: dffffc0000000000 R15: ffff888011981ef8
[  430.864895][T14786] FS:  00007f3862fec700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
[  430.873936][T14786] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  430.978571][T14786] CR2: 0000562049e512d8 CR3: 0000000012e0c000 CR4: 00000000001526e0
[  431.025063][T14786] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  431.070169][T14786] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  431.104487][T14786] Kernel panic - not syncing: Fatal exception
[  431.111346][T14786] Kernel Offset: disabled
[  431.115794][T14786] Rebooting in 86400 seconds..
