BUG: corrupted list in p9_read

[upstream] BUG: corrupted list in p9_read_work (2)
Status: upstream: reported syz repro on 2018/11/23 06:29
Reported-by: syzbot+77a25acfa0382e06ab23@syzkaller.appspotmail.com
First crash: 116d, last: 10h46m

similar bugs:
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	BUG: corrupted list in p9_read_work	syz		23	134d	246d	12/12	fixed on 2018/11/12 21:25

Sample crash report:

8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
list_del corruption, ffff8881d12ddfb0->next is LIST_POISON1 (dead000000000100)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:47!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 2915 Comm: kworker/0:2 Not tainted 4.20.0-rc3+ #124
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events p9_read_work
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x4a lib/list_debug.c:45
Code: d2 fd 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 d1 60 88 e8 c6 37 d2 fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 60 d0 60 88 e8 b2 37 d2 fd <0f> 0b 48 89 de 48 c7 c7 c0 d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de
RSP: 0018:ffff8881cb9075c0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff8881d12ddfb0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
RBP: ffff8881cb9075d8 R08: ffff8881cbb30400 R09: ffffed103b5c5020
R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: dead000000000200
R13: dead000000000100 R14: ffff8881d8fd6a90 R15: ffff8881d8fd6a50
FS:  0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001b3f06000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del include/linux/list.h:125 [inline]
 p9_read_work+0xa95/0x1140 net/9p/trans_fd.c:378
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
---[ end trace e66a284578a06221 ]---
RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x4a lib/list_debug.c:45
Code: d2 fd 0f 0b 4c 89 e2 48 89 de 48 c7 c7 00 d1 60 88 e8 c6 37 d2 fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 60 d0 60 88 e8 b2 37 d2 fd <0f> 0b 48 89 de 48 c7 c7 c0 d1 60 88 e8 a1 37 d2 fd 0f 0b 48 89 de
RSP: 0018:ffff8881cb9075c0 EFLAGS: 00010286
RAX: 000000000000004e RBX: ffff8881d12ddfb0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8165eaf5 RDI: 0000000000000005
RBP: ffff8881cb9075d8 R08: ffff8881cbb30400 R09: ffffed103b5c5020
R10: ffffed103b5c5020 R11: ffff8881dae28107 R12: dead000000000200
R13: dead000000000100 R14: ffff8881d8fd6a90 R15: ffff8881d8fd6a50
FS:  0000000000000000(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001b3f06000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

All crashes (17):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	Maintainers
ci-upstream-kasan-gce-smack-root	2018/11/22 22:26	upstream	edeca3a7	87815d9d	.config	log	report	syz	asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-selinux-root	2019/01/02 09:18	upstream	28e8c4bc	3d85f48c	.config	log	report	syz	asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-root	2019/01/02 07:13	upstream	28e8c4bc	3d85f48c	.config	log	report	syz	asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-smack-root	2019/01/02 05:47	upstream	28e8c4bc	3d85f48c	.config	log	report	syz	asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-selinux-root	2018/11/22 23:09	upstream	edeca3a7	87815d9d	.config	log	report	syz	asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2019/01/02 00:22	linux-next	6a1d2932	3d85f48c	.config	log	report	syz	asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2018/11/22 23:07	linux-next	442b8cea	87815d9d	.config	log	report	syz	asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-smack-root	2018/11/22 20:06	upstream	edeca3a7	87815d9d	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-smack-root	2019/03/18 19:21	upstream	9e98c678	4656beca	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-root	2019/03/18 19:07	upstream	9e98c678	4656beca	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-smack-root	2019/01/01 20:46	upstream	e1ef035d	3d85f48c	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-smack-root	2018/12/24 11:27	upstream	8fe28cb5	be79df56	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-kasan-gce-selinux-root	2018/12/16 16:59	upstream	6531e115	def91db3	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2019/03/17 18:08	linux-next	cf08baa2	ba18afea	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2019/01/13 12:21	linux-next	b808822a	c3f3344c	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2019/01/01 20:44	linux-next	6a1d2932	3d85f48c	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net
ci-upstream-linux-next-kasan-gce-root	2018/12/31 00:03	linux-next	6a1d2932	2b42fdc8	.config	log	report		asmadeus@codewreck.org, davem@davemloft.net, ericvh@gmail.com, linux-kernel@vger.kernel.org, lucho@ionkov.net, netdev@vger.kernel.org, v9fs-developer@lists.sourceforge.net