BUG: unable to handle kernel paging request in tpg_fill_plane

BUG: unable to handle kernel paging request in tpg_fill_plane_buffer
Status: upstream: reported syz repro on 2018/11/27 07:01
Reported-by: syzbot+aa8212f63ea8ffaf3bfa@syzkaller.appspotmail.com
First crash: 876d, last: 507d

Cause bisection: introduced by (bisect log) :
commit f2fe89061d79706eca5c47e4efdc09bbc171e74a
Author: Helen Koike <helen.koike@collabora.com>
Date: Fri Apr 7 17:55:19 2017 +0000

[media] vimc: Virtual Media Controller core, capture and sensor

Crash: INFO: task hung in vivid_stop_generating_vid_cap (log)
Repro: syz .config

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	BUG: unable to handle kernel paging request in tpg_fill_plane_buffer				4	342d	615d	0/1	auto-closed as invalid on 2020/09/11 05:35
linux-4.14	BUG: unable to handle kernel paging request in tpg_fill_plane_buffer				1	447d	447d	0/1	auto-closed as invalid on 2020/05/29 08:05

Sample crash report:

IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
8021q: adding VLAN 0 to HW filter on device team0
8021q: adding VLAN 0 to HW filter on device team0
BUG: unable to handle kernel paging request at ffffc900073cf340
#PF error: [WRITE]
PGD 1da93a067 P4D 1da93a067 PUD 1da93b067 PMD 1bad61067 PTE 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10163 Comm: vivid-000-vid-c Not tainted 4.20.0-rc7-next-20181224 #188
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:55
Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 <f3> a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe
kobject: 'loop0' (00000000cecb8b38): kobject_uevent_env
RSP: 0018:ffff8881d455f4f8 EFLAGS: 00010246
RAX: ffffc900073cf340 RBX: 00000000000000f8 RCX: 00000000000000f8
RDX: 00000000000000f8 RSI: ffffc90001da3000 RDI: ffffc900073cf340
RBP: ffff8881d455f518 R08: fffff52000e79e87 R09: fffff52000e79e87
R10: fffff52000e79e86 R11: ffffc900073cf437 R12: ffffc900073cf340
R13: ffffc90001da3000 R14: dffffc0000000000 R15: ffff8881cb5a5e60
FS:  0000000000000000(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000
kobject: 'loop0' (00000000cecb8b38): fill_kobj_path: path = '/devices/virtual/block/loop0'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900073cf340 CR3: 00000001c0ef1000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 memcpy include/linux/string.h:352 [inline]
 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2382 [inline]
 tpg_fill_plane_buffer+0x193f/0x44c0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2481
 vivid_fillbuff+0x1c87/0x6620 drivers/media/platform/vivid/vivid-kthread-cap.c:467
 vivid_thread_vid_cap_tick drivers/media/platform/vivid/vivid-kthread-cap.c:718 [inline]
 vivid_thread_vid_cap+0xf00/0x2ce0 drivers/media/platform/vivid/vivid-kthread-cap.c:836
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Modules linked in:
CR2: ffffc900073cf340
---[ end trace 5df23b5ab40374c3 ]---
RIP: 0010:memcpy_erms+0x6/0x10 arch/x86/lib/memcpy_64.S:55
Code: 90 90 90 90 eb 1e 0f 1f 00 48 89 f8 48 89 d1 48 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 66 0f 1f 44 00 00 48 89 f8 48 89 d1 <f3> a4 c3 0f 1f 80 00 00 00 00 48 89 f8 48 83 fa 20 72 7e 40 38 fe
RSP: 0018:ffff8881d455f4f8 EFLAGS: 00010246
RAX: ffffc900073cf340 RBX: 00000000000000f8 RCX: 00000000000000f8
RDX: 00000000000000f8 RSI: ffffc90001da3000 RDI: ffffc900073cf340
RBP: ffff8881d455f518 R08: fffff52000e79e87 R09: fffff52000e79e87
R10: fffff52000e79e86 R11: ffffc900073cf437 R12: ffffc900073cf340
R13: ffffc90001da3000 R14: dffffc0000000000 R15: ffff8881cb5a5e60
FS:  0000000000000000(0000) GS:ffff8881dac00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc900073cf340 CR3: 00000001c0ef1000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (17):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro
ci-upstream-linux-next-kasan-gce-root	2018/12/25 12:36	linux-next	6a1d2932	8a41a0ad	.config	log	report	syz
ci-upstream-kasan-gce-root	2019/12/01 21:06	upstream	b94ae8ad	a76bf83f	.config	log	report
ci-upstream-kasan-gce-smack-root	2019/08/16 16:35	upstream	32912042	8fd428a1	.config	log	report
ci-upstream-kasan-gce-selinux-root	2019/03/09 23:13	upstream	38e7571c	12365b99	.config	log	report
ci-upstream-kasan-gce-root	2019/03/04 12:51	upstream	1c163f4c	7c693b52	.config	log	report
ci-upstream-kasan-gce	2019/02/27 18:37	upstream	7d762d69	083cfd0e	.config	log	report
ci-upstream-kasan-gce-selinux-root	2019/02/26 09:36	upstream	7d762d69	8022bafd	.config	log	report
ci-upstream-kasan-gce-root	2019/02/19 10:10	upstream	b5372fe5	59f36113	.config	log	report
ci-upstream-kasan-gce	2019/02/11 17:56	upstream	d1393711	73f5f452	.config	log	report
ci-upstream-kasan-gce-selinux-root	2019/02/02 21:30	upstream	cd984a5b	c198d5dd	.config	log	report
ci-upstream-kasan-gce-selinux-root	2018/12/05 16:25	upstream	0072a0c1	ac6c0578	.config	log	report
ci-upstream-kasan-gce-smack-root	2018/11/27 03:53	upstream	6f8b52ba	ac912200	.config	log	report
ci-upstream-kasan-gce-386	2019/06/30 01:40	upstream	72825454	7509bf36	.config	log	report
ci-upstream-kasan-gce-386	2019/06/25 14:59	upstream	4b972a01	82c13b6b	.config	log	report
ci-upstream-kasan-gce-386	2019/03/04 12:48	upstream	1c163f4c	7c693b52	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2019/02/02 21:35	linux-next	dc4c8999	c198d5dd	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2018/12/25 07:20	linux-next	6a1d2932	8a41a0ad	.config	log	report