WARNING in __kernel

WARNING in __kernel_read (2)
Status: upstream: reported C repro on 2020/09/26 02:58
Reported-by: syzbot+51177e4144d764827c45@syzkaller.appspotmail.com
First crash: 213d, last: 5h40m

Cause bisection: failed (bisect log)

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in __kernel_read	C	done		60	225d	284d	17/22	fixed on 2020/09/16 22:51

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 0 PID: 7028 at fs/read_write.c:440 __kernel_read+0x80e/0xa10 fs/read_write.c:440
Modules linked in:
CPU: 0 PID: 7028 Comm: syz-executor458 Not tainted 5.9.0-rc5-next-20200921-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__kernel_read+0x80e/0xa10 fs/read_write.c:440
Code: 8a e8 c6 97 12 02 31 ff 89 c3 89 c6 e8 2b ac b3 ff 85 db 0f 85 6e 3b 55 06 49 c7 c5 ea ff ff ff e9 bd fd ff ff e8 b2 af b3 ff <0f> 0b 49 c7 c5 ea ff ff ff e9 aa fd ff ff e8 9f af b3 ff 48 89 ea
RSP: 0018:ffffc90006027b38 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff81c1715b
RDX: ffff888091eba480 RSI: ffffffff81c1787e RDI: 0000000000000005
RBP: 000000000008801c R08: 0000000000000001 R09: ffff888091ebad88
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a16710c0
R13: 0000000000000001 R14: ffffc90006027d08 R15: ffff8880a1671144
FS:  00007efcd60f1700(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 00000000a2dc5000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kernel_read+0x52/0x70 fs/read_write.c:471
 kernel_read_file fs/exec.c:989 [inline]
 kernel_read_file+0x2e5/0x620 fs/exec.c:952
 kernel_read_file_from_fd+0x56/0xa0 fs/exec.c:1076
 __do_sys_finit_module+0xe6/0x190 kernel/module.c:4066
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x44a639
Code: e8 bc b4 02 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 4b cc fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007efcd60f0db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 000000000044a639
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00000000006dbc60 R08: 00007efcd60f1700 R09: 0000000000000000
R10: 00007efcd60f1700 R11: 0000000000000246 R12: 00000000006dbc6c
R13: 00007ffd3d8928ef R14: 00007efcd60f19c0 R15: 0000000000000001

Crashes (44):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-linux-next-kasan-gce-root	2020/09/22 02:56	linux-next	b10b8ad8	9e1fa68e	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2021/04/23 06:29	upstream	90c911ad	590921a5	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/04/21 17:55	upstream	1fe5501b	95777977	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/04/21 17:55	upstream	1fe5501b	95777977	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-selinux-root	2021/04/20 09:11	upstream	7af08140	4285c989	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/04/20 08:51	upstream	7af08140	4285c989	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-smack-root	2021/04/20 08:40	upstream	7af08140	4285c989	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-selinux-root	2021/04/17 17:29	upstream	9cdbf646	7e2b734b	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/04/17 15:57	upstream	9cdbf646	7e2b734b	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-smack-root	2021/04/17 15:55	upstream	9cdbf646	7e2b734b	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/04/07 06:10	upstream	2d743660	6a81331a	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/04/07 06:05	upstream	2d743660	6a81331a	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-smack-root	2021/04/07 05:44	upstream	2d743660	6a81331a	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-smack-root	2021/04/07 05:40	upstream	2d743660	6a81331a	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-selinux-root	2021/03/26 12:10	upstream	db24726b	6a383ecf	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-smack-root	2021/03/26 11:27	upstream	db24726b	6a383ecf	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/03/09 15:22	upstream	144c79ef	09fbf400	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-smack-root	2021/03/09 14:19	upstream	144c79ef	09fbf400	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-selinux-root	2021/03/09 14:18	upstream	144c79ef	09fbf400	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/03/06 19:37	upstream	a38fd874	e4b4d570	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-root	2021/01/21 03:51	upstream	75439bc4	d4f4eca5	.config	log	report			info	WARNING in __kernel_read
ci-upstream-linux-next-kasan-gce-root	2021/04/20 08:40	linux-next	1216f02e	4285c989	.config	log	report			info	WARNING in __kernel_read
ci-upstream-linux-next-kasan-gce-root	2021/04/07 06:28	linux-next	9c54130c	6a81331a	.config	log	report			info	WARNING in __kernel_read
ci-upstream-linux-next-kasan-gce-root	2021/04/07 00:39	linux-next	9c54130c	6a81331a	.config	log	report			info	WARNING in __kernel_read
ci-upstream-kasan-gce-selinux-root	2020/12/13 06:08	upstream	7b1b868e	bca53db9	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/12/13 04:51	upstream	7b1b868e	bca53db9	.config	log	report			info
ci-upstream-kasan-gce-root	2020/12/12 23:41	upstream	7b1b868e	bca53db9	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/11/20 00:34	upstream	131ad0b6	0767f13f	.config	log	report			info
ci-upstream-kasan-gce-root	2020/11/20 00:32	upstream	3494d588	0767f13f	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/11/20 00:32	upstream	131ad0b6	0767f13f	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/11/17 17:26	upstream	9c87c9f4	bd2a760b	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/11/17 17:24	upstream	9c87c9f4	bd2a760b	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/11/17 17:24	upstream	9c87c9f4	bd2a760b	.config	log	report			info
ci-upstream-kasan-gce-root	2020/11/17 17:24	upstream	9c87c9f4	bd2a760b	.config	log	report			info
ci-upstream-kasan-gce-root	2020/11/17 17:24	upstream	9c87c9f4	bd2a760b	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/11/17 17:24	upstream	9c87c9f4	bd2a760b	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/11/16 00:30	upstream	0062442e	1bf9a662	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/12/12 21:35	linux-next	14240d4c	bca53db9	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/20 00:54	linux-next	f8550c0d	0767f13f	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/17 17:24	linux-next	7c8ca812	bd2a760b	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/17 17:24	linux-next	7c8ca812	bd2a760b	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/15 23:13	linux-next	92edc4ae	1bf9a662	.config	log	report			info