IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
WARNING: CPU: 1 PID: 5539 at lib/iov_iter.c:918 iov_iter_revert+0x2ee/0xaa0 lib/iov_iter.c:918
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 5539 Comm: syz-executor7 Not tainted 4.18.0-rc3+ #128
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x252/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992
RIP: 0010:iov_iter_revert+0x2ee/0xaa0 lib/iov_iter.c:918
Code: 74 24 08 4d 89 7d 20 48 89 de 49 83 c7 01 4c 89 f7 e8 86 62 1f fe 49 39 de 72 b7 e8 cc 61 1f fe e9 3b ff ff ff e8 c2 61 1f fe <0f> 0b e9 3a ff ff ff e8 b6 61 1f fe 49 8d 7d 18 48 b8 00 00 00 00 
RSP: 0018:ffff88019fc8f788 EFLAGS: 00010216
RAX: 0000000000040000 RBX: 00000000ffffffff RCX: ffffc90002a1a000
RDX: 00000000000002d8 RSI: ffffffff835caa0e RDI: 0000000000000007
RBP: ffff88019fc8f7e8 R08: ffff8801aa15c180 R09: 0000000000000006
R10: ffff8801aa15c180 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88019fc8fad0 R14: 000000000000003f R15: ffff8801c5d36400
 tls_sw_sendmsg+0xf10/0x12c0 net/tls/tls_sw.c:448
 inet_sendmsg+0x1a1/0x690 net/ipv4/af_inet.c:798
 sock_sendmsg_nosec net/socket.c:641 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:651
 sock_write_iter+0x362/0x5c0 net/socket.c:920
 call_write_iter include/linux/fs.h:1793 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x6c6/0x9f0 fs/read_write.c:487
 vfs_write+0x1f8/0x560 fs/read_write.c:549
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455ab9
Code: 1d ba 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 eb b9 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f62f9e8cc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f62f9e8d6d4 RCX: 0000000000455ab9
RDX: 000000000000003f RSI: 00000000200002c0 RDI: 0000000000000015
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c278b R14: 00000000004d4088 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..