kernel BUG at net/phonet/socket.c:LINE!

kernel BUG at net/phonet/socket.c:LINE!
Status: upstream: reported on 2020/04/10 07:16
Reported-by: syzbot+2dc91e7fc3dea88b1e8a@syzkaller.appspotmail.com
First crash: 121d, last: 1d19h

Sample crash report:

------------[ cut here ]------------
kernel BUG at net/phonet/socket.c:213!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 32339 Comm: syz-executor.0 Not tainted 5.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline]
RIP: 0010:pn_socket_autobind+0x13c/0x160 net/phonet/socket.c:202
Code: 44 05 00 00 00 00 00 48 8b 44 24 58 65 48 2b 04 25 28 00 00 00 75 26 48 83 c4 60 44 89 e0 5b 5d 41 5c 41 5d c3 e8 84 b3 25 fa <0f> 0b e8 6d 17 65 fa eb 9f e8 86 17 65 fa e9 6d ff ff ff e8 6c c6
RSP: 0018:ffffc9001741fb30 EFLAGS: 00010216
RAX: 00000000000000b9 RBX: 0000000000000000 RCX: ffffc90001f2a000
RDX: 0000000000040000 RSI: ffffffff874e067c RDI: 0000000000000003
RBP: 1ffff92002e83f66 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880591f6dc0 R15: ffff88804f423000
FS:  00007f43ce25b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d829000 CR3: 0000000056a94000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pn_socket_sendmsg+0x40/0xd0 net/phonet/socket.c:423
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 sock_write_iter+0x28c/0x3c0 net/socket.c:999
 call_write_iter include/linux/fs.h:1908 [inline]
 new_sync_write+0x422/0x650 fs/read_write.c:503
 vfs_write+0x59d/0x6b0 fs/read_write.c:578
 ksys_write+0x1ee/0x250 fs/read_write.c:631
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c1f9
Code: Bad RIP value.
RSP: 002b:00007f43ce25ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000037200 RCX: 000000000045c1f9
RDX: 000000000000ff4d RSI: 0000000020000140 RDI: 0000000000000007
RBP: 000000000078bfe0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac
R13: 00007fffe6b789df R14: 00007f43ce25b9c0 R15: 000000000078bfac
Modules linked in:
---[ end trace 38ace389f04f6e4f ]---
RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline]
RIP: 0010:pn_socket_autobind+0x13c/0x160 net/phonet/socket.c:202
Code: 44 05 00 00 00 00 00 48 8b 44 24 58 65 48 2b 04 25 28 00 00 00 75 26 48 83 c4 60 44 89 e0 5b 5d 41 5c 41 5d c3 e8 84 b3 25 fa <0f> 0b e8 6d 17 65 fa eb 9f e8 86 17 65 fa e9 6d ff ff ff e8 6c c6
RSP: 0018:ffffc9001741fb30 EFLAGS: 00010216
RAX: 00000000000000b9 RBX: 0000000000000000 RCX: ffffc90001f2a000
RDX: 0000000000040000 RSI: ffffffff874e067c RDI: 0000000000000003
RBP: 1ffff92002e83f66 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880591f6dc0 R15: ffff88804f423000
FS:  00007f43ce25b700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f625000 CR3: 0000000056a94000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (16):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Maintainers
ci-upstream-net-this-kasan-gce	2020/07/23 17:00	net	26cb7085	340ea530	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-this-kasan-gce	2020/06/17 18:57	net	4d3da2d8	b9f3810b	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-this-kasan-gce	2020/06/08 07:02	net	4d3da2d8	7751efd0	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-this-kasan-gce	2020/04/09 03:56	net	b93cfb9c	db9bcd4b	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/08/06 10:20	net-next	8ed54f16	0487ea6f	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/07/31 13:41	net-next	41d707b7	8df85ed9	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/07/30 13:17	net-next	41d707b7	233283a1	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/07/17 01:00	net-next	632ca50f	54b3c45e	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/07/15 08:27	net-next	07dd1b7e	609fb517	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/06/26 12:58	net-next	cb8e59cc	aea82c00	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/06/12 10:54	net-next	cb8e59cc	58802067	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/06/05 16:06	net-next	cb8e59cc	2420d1bc	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/06/05 01:05	net-next	cb8e59cc	6720fdef	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/06/02 05:12	net-next	9a25c1df	a0331e89	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/05/24 10:51	net-next	54b9aca0	96c92ad3	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/05/14 08:45	net-next	6cb75767	a885920d	.config	log	report	courmisch@gmail.com, davem@davemloft.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org