general protection fault in prepare_to

general protection fault in prepare_to_wait
Status: upstream: reported C repro on 2019/01/03 10:44
Reported-by: syzbot+55f9d3e51d49e20b2ce5@syzkaller.appspotmail.com
First crash: 858d, last: 11d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: inconsistent lock state in nr_find_socket (log)
Repro: C syz .config

Fix bisection: failed (bisect log)

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	general protection fault in prepare_to_wait	C		error	7	80d	694d	0/1	upstream: reported C repro on 2019/06/16 06:33
linux-4.19	general protection fault in prepare_to_wait	C		error	17	75d	637d	0/1	upstream: reported C repro on 2019/08/12 18:19

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2020/10/20 13:09	18m	anant.thazhemadam@gmail.com		upstream	report log

Sample crash report:

general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 PID: 10864 Comm: syz-executor944 Not tainted 5.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x1254/0x4a00 kernel/locking/lockdep.c:3827
Code: 00 0f 85 96 24 00 00 48 81 c4 f0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 0b 28 00 00 49 81 3e 60 37 bd 8a 0f 84 5f ee ff
RSP: 0018:ffffc90001e67a18 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90001e67b30 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1505ce0 R11: ffff8880a7e1e300 R12: 0000000000000018
R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000001
FS:  00007fa530d37700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ad780 CR3: 000000009f9f5000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:159
 prepare_to_wait+0x7c/0x300 kernel/sched/wait.c:244
 nr_accept+0x245/0x770 net/netrom/af_netrom.c:771
 __sys_accept4_file+0x3be/0x5e0 net/socket.c:1758
 __sys_accept4+0x5a/0xa0 net/socket.c:1809
 __do_sys_accept net/socket.c:1827 [inline]
 __se_sys_accept net/socket.c:1824 [inline]
 __x64_sys_accept+0x75/0xb0 net/socket.c:1824
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x447fb9
Code: e8 ec 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 8b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa530d36db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002b
RAX: ffffffffffffffda RBX: 00000000006ddc68 RCX: 0000000000447fb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006ddc60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc6c
R13: 00007fffe120c1ff R14: 00007fa530d379c0 R15: 000000000000002d
Modules linked in:
---[ end trace 81a179622db7238a ]---
RIP: 0010:__lock_acquire+0x1254/0x4a00 kernel/locking/lockdep.c:3827
Code: 00 0f 85 96 24 00 00 48 81 c4 f0 00 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 0b 28 00 00 49 81 3e 60 37 bd 8a 0f 84 5f ee ff
RSP: 0018:ffffc90001e67a18 EFLAGS: 00010006
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffffc90001e67b30 R08: 0000000000000001 R09: 0000000000000001
R10: fffffbfff1505ce0 R11: ffff8880a7e1e300 R12: 0000000000000018
R13: 0000000000000000 R14: 0000000000000018 R15: 0000000000000001
FS:  00007fa530d37700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004ad780 CR3: 000000009f9f5000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (228):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce-selinux-root	2020/01/30 04:13	upstream	b3a60822	5ed23f9a	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/01/29 08:19	upstream	c677124e	c8e81ce4	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/01/27 09:24	upstream	a45ea48e	dd56146d	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2019/08/30 10:56	upstream	6525771f	fd37b39e	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2019/02/15 15:18	upstream	cb5b020a	f6f233c0	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2019/02/15 05:42	upstream	23e93c9b	76dd003f	.config	log	report	syz	C
ci-upstream-net-this-kasan-gce	2020/01/27 08:54	net	2821e26f	dd56146d	.config	log	report	syz	C
ci-upstream-net-this-kasan-gce	2019/07/26 20:03	net	107e47cc	3e5d1beb	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/02/14 18:00	linux-next	9f01828e	5d7b90f1	.config	log	report	syz	C
ci-qemu-upstream	2020/06/06 22:01	upstream	435faf5c	e6b89e4e	.config	log	report	syz
ci-upstream-kasan-gce-selinux-root	2019/08/30 11:21	upstream	6525771f	fd37b39e	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2019/08/30 11:19	upstream	6525771f	fd37b39e	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2019/08/20 19:54	upstream	5f97cbe2	cfc9868f	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2019/04/24 09:02	upstream	7142eaa5	4d3d6a50	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2019/03/16 11:22	upstream	6c83d0d5	bab43553	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2019/02/15 05:23	upstream	23e93c9b	76dd003f	.config	log	report	syz
ci-upstream-net-this-kasan-gce	2019/02/08 12:05	net	ec7fd009	aa4feb03	.config	log	report	syz
ci-upstream-net-kasan-gce	2020/01/27 08:59	net-next	14a1d246	dd56146d	.config	log	report	syz
ci-upstream-net-kasan-gce	2019/03/16 10:56	net-next	3b319ee2	bab43553	.config	log	report	syz
ci-upstream-linux-next-kasan-gce-root	2019/12/19 21:23	linux-next	9f8535c5	36650b4b	.config	log	report	syz
ci-upstream-linux-next-kasan-gce-root	2019/07/26 22:22	linux-next	fde50b96	3e5d1beb	.config	log	report	syz
ci-upstream-linux-next-kasan-gce-root	2019/03/16 11:41	linux-next	cf08baa2	bab43553	.config	log	report	syz
ci-upstream-linux-next-kasan-gce-root	2019/02/08 12:28	linux-next	a46228f6	aa4feb03	.config	log	report	syz
ci-upstream-kasan-gce-root	2021/02/17 20:57	upstream	f40ddce8	14052202	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-kasan-gce-root	2021/02/14 13:42	upstream	358fecee	98682e5e	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-kasan-gce-root	2021/02/14 09:39	upstream	ac30d8ce	98682e5e	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-kasan-gce-root	2021/02/13 12:24	upstream	c6d8570e	98682e5e	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-kasan-gce-root	2021/02/12 21:29	upstream	dcc0b490	98682e5e	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-kasan-gce-smack-root	2021/02/12 10:39	upstream	dcc0b490	a5f86b15	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-kasan-gce-root	2021/02/12 01:35	upstream	291009f6	a5f86b15	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-net-kasan-gce	2021/04/29 19:22	net-next	95aafe91	77e2b668	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-net-kasan-gce	2021/03/02 18:11	net-next	d310ec03	92ead296	.config	log	report			info	general protection fault in prepare_to_wait
ci-upstream-kasan-gce-root	2020/07/24 20:11	upstream	f37e99ac	554af388	.config	log	report
ci-upstream-kasan-gce-root	2020/02/22 19:37	upstream	54dedb5b	2c36e7a7	.config	log	report
ci-upstream-kasan-gce-selinux-root	2019/10/18 02:06	upstream	283ea345	8c88c9c1	.config	log	report
ci-upstream-kasan-gce-selinux-root	2019/09/29 10:07	upstream	02dc96ef	c1ad5441	.config	log	report
ci-upstream-kasan-gce-selinux-root	2019/09/05 15:50	upstream	3b47fd5c	040fda58	.config	log	report
ci-upstream-kasan-gce-selinux-root	2019/08/28 19:46	upstream	6525771f	fd37b39e	.config	log	report
ci-upstream-net-this-kasan-gce	2021/01/12 23:40	net	1ee527a7	0cdd6185	.config	log	report			info
ci-upstream-net-this-kasan-gce	2020/12/19 13:03	net	1e72faed	04201c06	.config	log	report			info
ci-upstream-net-this-kasan-gce	2020/12/03 17:44	net	832e0979	e6b0d314	.config	log	report			info
ci-upstream-net-this-kasan-gce	2020/09/10 14:06	net	a19454b6	409809d8	.config	log	report
ci-upstream-net-this-kasan-gce	2020/07/01 20:40	net	8ff41cc2	39acb39d	.config	log	report
ci-upstream-net-this-kasan-gce	2020/06/10 12:14	net	4d3da2d8	860c4de9	.config	log	report
ci-upstream-net-this-kasan-gce	2020/06/05 17:51	net	5e9eeccc	2420d1bc	.config	log	report
ci-upstream-net-this-kasan-gce	2020/05/10 23:10	net	090e28b2	8742a2b9	.config	log	report
ci-upstream-net-this-kasan-gce	2020/05/10 19:55	net	090e28b2	8742a2b9	.config	log	report
ci-upstream-net-this-kasan-gce	2020/05/04 12:47	net	b959c77d	58ae5e18	.config	log	report
ci-upstream-net-this-kasan-gce	2020/05/01 02:51	net	30724ccb	3698959a	.config	log	report
ci-upstream-net-this-kasan-gce	2020/04/03 21:54	net	468c2a10	5ed396e6	.config	log	report
ci-upstream-net-this-kasan-gce	2020/03/23 11:12	net	749f6f68	78267cec	.config	log	report
ci-upstream-net-this-kasan-gce	2020/01/24 20:58	net	623c8d5c	2e95ab33	.config	log	report
ci-upstream-net-this-kasan-gce	2019/09/17 16:53	net	00b36850	13dcda9b	.config	log	report
ci-upstream-net-this-kasan-gce	2019/09/03 06:25	net	e33b4325	14544a56	.config	log	report
ci-upstream-net-this-kasan-gce	2019/09/02 15:56	net	dd7078f0	db7c31ca	.config	log	report
ci-upstream-net-this-kasan-gce	2019/09/02 07:14	net	dd7078f0	db7c31ca	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/31 21:40	net	5f81d545	bad3cce2	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/31 08:13	net	9e8312f5	fd37b39e	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/30 23:10	net	9e8312f5	fd37b39e	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/30 18:18	net	9e8312f5	fd37b39e	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/30 03:12	net	9e8312f5	fd37b39e	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/27 04:34	net	f53a7ad1	d21c5d9d	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/25 12:03	net	12e2e15d	d21c5d9d	.config	log	report
ci-upstream-net-this-kasan-gce	2019/08/23 00:13	net	cc07db5a	d003d6d0	.config	log	report
ci-upstream-net-this-kasan-gce	2019/01/02 21:32	net	e8884027	f0491811	.config	log	report
ci-upstream-net-kasan-gce	2020/12/05 12:22	net-next	bcd684aa	50503117	.config	log	report			info
ci-upstream-net-kasan-gce	2020/12/03 05:34	net-next	cec85994	8c9190ef	.config	log	report			info
ci-upstream-net-kasan-gce	2020/11/04 20:22	net-next	3fb6928b	cba33199	.config	log	report			info
ci-upstream-net-kasan-gce	2020/09/30 12:07	net-next	28009571	5abc3f1a	.config	log	report			info
ci-upstream-net-kasan-gce	2020/09/01 10:26	net-next	c30a3c95	d5a3ae1f	.config	log	report
ci-upstream-net-kasan-gce	2020/07/20 09:08	net-next	7dce80c2	9c812472	.config	log	report
ci-upstream-net-kasan-gce	2020/05/15 11:39	net-next	86b6ba17	2d572622	.config	log	report
ci-upstream-net-kasan-gce	2020/05/13 16:38	net-next	fb9f2e92	9a6d42fb	.config	log	report
ci-upstream-net-kasan-gce	2020/04/18 20:16	net-next	2fcd8014	365fba24	.config	log	report
ci-upstream-net-kasan-gce	2020/01/26 14:13	net-next	3333e50b	f4e7270e	.config	log	report
ci-upstream-net-kasan-gce	2020/01/09 10:34	net-next	53ebeca2	ddc3e859	.config	log	report
ci-upstream-net-kasan-gce	2019/11/01 01:05	net-next	d86784fe	a41ca8fa	.config	log	report
ci-upstream-net-kasan-gce	2019/01/02 20:22	net-next	b71acb0e	f0491811	.config	log	report