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

kernel BUG at net/phonet/socket.c:LINE!
Status: upstream: reported C repro on 2020/04/10 07:16
Reported-by: syzbot+2dc91e7fc3dea88b1e8a@syzkaller.appspotmail.com
Fix commit: 75a2f3152009 phonet/pep: refuse to enable an unbound pipe
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64 ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386]
First crash: 659d, last: 37d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: kernel BUG in pn_socket_autobind (log)
Repro: C syz .config

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	kernel BUG in pn_socket_autobind (2)	C		error	3	39d	158d	0/1	upstream: reported C repro on 2021/08/23 00:08
linux-4.19	kernel BUG in pn_socket_autobind				1	293d	293d	0/1	auto-closed as invalid on 2021/08/07 18:14

Sample crash report:

netlink: 'syz-executor185': attribute type 2 has an invalid length.
------------[ cut here ]------------
kernel BUG at net/phonet/socket.c:213!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3620 Comm: syz-executor185 Not tainted 5.16.0-rc5-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 net/phonet/socket.c:213 [inline] net/phonet/socket.c:202
RIP: 0010:pn_socket_autobind+0x13c/0x160 net/phonet/socket.c:202 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 64 60 1e f9 <0f> 0b e8 2d 25 65 f9 eb 9f e8 46 25 65 f9 e9 6d ff ff ff e8 8c 2b
RSP: 0018:ffffc90001bafc40 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801c748000 RSI: ffffffff8859516c RDI: 0000000000000003
RBP: 1ffff92000375f88 R08: 00000000ffffffea R09: 0000000000000000
R10: ffffffff8859512c R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88801c748000
FS:  0000555556878300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000740 CR3: 0000000018a78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pn_socket_connect+0xfc/0x970 net/phonet/socket.c:227 net/phonet/socket.c:227
 __sys_connect_file+0x155/0x1a0 net/socket.c:1896 net/socket.c:1896
 __sys_connect+0x161/0x190 net/socket.c:1913 net/socket.c:1913
 __do_sys_connect net/socket.c:1923 [inline]
 __se_sys_connect net/socket.c:1920 [inline]
 __do_sys_connect net/socket.c:1923 [inline] net/socket.c:1920
 __se_sys_connect net/socket.c:1920 [inline] net/socket.c:1920
 __x64_sys_connect+0x6f/0xb0 net/socket.c:1920 net/socket.c:1920
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_x64 arch/x86/entry/common.c:50 [inline] arch/x86/entry/common.c:80
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9bf1080159
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff1adca428 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f9bf1080159
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000013355
R13: 00007fff1adca490 R14: 00007fff1adca480 R15: 00007fff1adca44c
 </TASK>
Modules linked in:
---[ end trace 16a4e3e11e1ba5b9 ]---
RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline]
RIP: 0010:pn_socket_autobind net/phonet/socket.c:213 [inline] net/phonet/socket.c:202
RIP: 0010:pn_socket_autobind+0x13c/0x160 net/phonet/socket.c:202 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 64 60 1e f9 <0f> 0b e8 2d 25 65 f9 eb 9f e8 46 25 65 f9 e9 6d ff ff ff e8 8c 2b
RSP: 0018:ffffc90001bafc40 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801c748000 RSI: ffffffff8859516c RDI: 0000000000000003
RBP: 1ffff92000375f88 R08: 00000000ffffffea R09: 0000000000000000
R10: ffffffff8859512c R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88801c748000
FS:  0000555556878300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000740 CR3: 0000000018a78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (168):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-net-this-kasan-gce	2021/12/19 14:58	net	60ec7fcfe768	44068e19	.config	log	report	syz	C		kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/12/19 15:31	net-next	f85b244ee395	44068e19	.config	log	report	syz	C		kernel BUG in pn_socket_autobind
ci-upstream-kasan-gce-root	2021/12/21 20:24	upstream	6e0567b73052	a938f0b8	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/12/19 13:13	net	60ec7fcfe768	44068e19	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/12/06 15:48	net	2be6d4d16a08	579a8754	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/12/04 20:25	net	2be6d4d16a08	a617004c	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/21 21:44	net	f9390b249c90	4eb20a4e	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/19 02:35	net	c7521d3aa2fa	31a30fc0	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/16 21:57	net	848e5d66fa31	600426bd	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/15 04:26	net	1aa3b2207e88	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/14 12:37	net	70701b83e208	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/14 06:55	net	70701b83e208	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/12 15:08	net	5833291ab6de	75b04091	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/11 01:52	net	8f1bc38bbb51	75b04091	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/09 20:31	net	0b9111922b1f	59bcaf9a	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/07 04:41	net	70bf363d7adb	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/07 02:04	net	70bf363d7adb	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/06 23:37	net	70bf363d7adb	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2021/11/04 14:47	net	92f62485b371	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-this-kasan-gce	2020/04/09 03:56	net	b93cfb9cd3af	db9bcd4b	.config	log	report
ci-upstream-net-kasan-gce	2021/12/14 02:48	net-next	a3c62a042237	5d14b1ea	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/12/08 06:15	net-next	1c5526968e27	0230ba3e	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/12/06 00:01	net-next	ce83278f313c	a617004c	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/12/05 09:16	net-next	ce83278f313c	a617004c	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/12/05 05:04	net-next	ce83278f313c	a617004c	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/12/03 10:54	net-next	fc993be36f9e	61f86278	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/30 23:39	net-next	72a2ff567fc3	80270552	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/28 15:25	net-next	d40ce48cb3a6	63eeac02	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/21 07:57	net-next	89f971182417	4eb20a4e	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/20 23:12	net-next	520fbdf7fb19	4eb20a4e	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/18 19:01	net-next	bb8cecf8ba12	31a30fc0	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/18 12:28	net-next	75082e7f4680	cafff8b6	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/17 07:58	net-next	62803fec52f8	cafff8b6	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/16 23:30	net-next	62803fec52f8	cafff8b6	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/16 07:40	net-next	3ad4b7c81a99	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/15 10:14	net-next	1274a4eb318d	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/15 05:18	net-next	1274a4eb318d	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/14 16:33	net-next	1274a4eb318d	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/14 08:04	net-next	66f4beaa6c1d	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/12 21:54	net-next	5833291ab6de	83f5c9b5	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/12 06:35	net-next	5833291ab6de	75b04091	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/11 19:40	net-next	cc0356d6a02e	75b04091	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/09 11:15	net-next	cc0356d6a02e	8ab17e57	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/08 21:10	net-next	cc0356d6a02e	d29682f1	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/08 13:05	net-next	cc0356d6a02e	d29682f1	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/06 09:39	net-next	cc0356d6a02e	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/06 07:02	net-next	cc0356d6a02e	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/06 01:37	net-next	cc0356d6a02e	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/05 10:26	net-next	cc0356d6a02e	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/04 19:17	net-next	cc0356d6a02e	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/11/04 17:39	net-next	cc0356d6a02e	4c1be0be	.config	log	report			info	kernel BUG in pn_socket_autobind
ci-upstream-net-kasan-gce	2021/01/17 02:45	net-next	9ab7e76aefc9	65a7a854	.config	log	report			info