WARNING in close_fs

WARNING in close_fs_devices (3)
Status: upstream: reported C repro on 2020/11/28 20:17
Reported-by: syzbot+a70e2ad0879f160b9217@syzkaller.appspotmail.com
First crash: 141d, last: 2h36m

Cause bisection: introduced by (bisect log) :
commit 4d004099a668c41522242aa146a38cc4eb59cb1e
Author: Peter Zijlstra <peterz@infradead.org>
Date: Fri Oct 2 09:04:21 2020 +0000

lockdep: Fix lockdep recursion

Crash: BUG: using __this_cpu_read() in preemptible code in trace_hardirqs_on (log)
Repro: C syz .config

similar bugs (3):
Kernel	Title	Repro	Count	Last	Reported	Patched	Status
upstream	WARNING in close_fs_devices	C	137	1001d	1044d	9/22	fixed on 2018/08/28 17:48
linux-4.19	WARNING in close_fs_devices	C	63	2d18h	211d	0/1	upstream: reported C repro on 2020/09/16 05:39
upstream	WARNING in close_fs_devices (2)	C	23	147d	208d	17/22	fixed on 2020/11/20 14:54

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 8537 at fs/btrfs/volumes.c:1174 close_fs_devices+0x71d/0x930 fs/btrfs/volumes.c:1174
Modules linked in:
CPU: 1 PID: 8537 Comm: syz-executor956 Not tainted 5.10.0-rc5-next-20201127-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:close_fs_devices+0x71d/0x930 fs/btrfs/volumes.c:1174
Code: e8 88 2f 42 fe 85 db 0f 85 5d f9 ff ff e8 9b 27 42 fe 0f 0b e9 51 f9 ff ff e8 8f 27 42 fe 0f 0b e9 c0 fe ff ff e8 83 27 42 fe <0f> 0b e9 f9 fe ff ff 48 c7 c7 1c 80 ee 8c e8 40 fb 84 fe e9 11 f9
RSP: 0018:ffffc9000183f750 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88801e07b580 RSI: ffffffff832e99dd RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000000 R09: ffff88801a17b93b
R10: ffffffff832e98d4 R11: 0000000000000000 R12: ffff88801a17b938
R13: ffff88801a17b9f4 R14: ffff888013e1c908 R15: ffff88801a17b850
FS:  00000000025a7880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f674003e048 CR3: 0000000012337000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 btrfs_close_devices+0x8e/0x4b0 fs/btrfs/volumes.c:1186
 open_ctree+0x3f90/0x4035 fs/btrfs/disk-io.c:3484
 btrfs_fill_super fs/btrfs/super.c:1362 [inline]
 btrfs_mount_root.cold+0x14/0x165 fs/btrfs/super.c:1731
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1549
 fc_mount fs/namespace.c:983 [inline]
 vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1013
 vfs_kern_mount+0x3c/0x60 fs/namespace.c:1000
 btrfs_mount+0x234/0xa20 fs/btrfs/super.c:1791
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1549
 do_new_mount fs/namespace.c:2896 [inline]
 path_mount+0x12ae/0x1e70 fs/namespace.c:3227
 do_mount fs/namespace.c:3240 [inline]
 __do_sys_mount fs/namespace.c:3448 [inline]
 __se_sys_mount fs/namespace.c:3425 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3425
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4492fa
Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 cd a2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 aa a2 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffe66329388 EFLAGS: 00000293 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004492fa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffe663293d0
RBP: 00007ffe66329410 R08: 00007ffe66329410 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 00007ffe663293d0 R14: 0000000000000003 R15: 0000000000000005

Crashes (35):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-linux-next-kasan-gce-root	2020/11/29 13:58	linux-next	6174f052	a0092f9d	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2021/04/15 05:18	upstream	7f75285c	fcdb12ba	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-selinux-root	2021/04/08 18:10	upstream	454859c5	6a81331a	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-selinux-root	2021/04/08 04:38	upstream	3a229812	6a81331a	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-selinux-root	2021/04/05 04:28	upstream	e49d033b	6a81331a	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-smack-root	2021/03/28 15:55	upstream	0f4498ce	a8529b82	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-root	2021/03/25 22:26	upstream	e1381380	6a383ecf	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-smack-root	2021/03/21 11:11	upstream	812da4d3	17810eae	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-root	2021/02/17 14:15	upstream	f40ddce8	052f8d9f	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-smack-root	2021/02/16 11:05	upstream	f40ddce8	98682e5e	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-smack-root	2021/02/12 16:00	upstream	dcc0b490	a5f86b15	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-selinux-root	2021/02/01 07:50	upstream	1048ba83	fc9fd31e	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-smack-root	2021/01/24 17:21	upstream	e1ae4b0b	52e37319	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-smack-root	2021/01/23 17:22	upstream	fe75a218	52e37319	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-selinux-root	2021/01/19 17:57	upstream	1e2a199f	63631df1	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-smack-root	2021/01/18 19:37	upstream	19c329f6	63631df1	.config	log	report			info	WARNING in close_fs_devices
ci-qemu-upstream-386	2021/02/02 00:34	upstream	88bb507a	e6b95f32	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-linux-next-kasan-gce-root	2021/04/09 00:42	linux-next	6145d80c	6a81331a	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-linux-next-kasan-gce-root	2021/03/26 20:30	linux-next	93129492	a8529b82	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-linux-next-kasan-gce-root	2021/02/01 05:04	linux-next	b01f250d	fc9fd31e	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-linux-next-kasan-gce-root	2021/02/01 04:50	linux-next	b01f250d	fc9fd31e	.config	log	report			info	WARNING in close_fs_devices
ci-upstream-kasan-gce-root	2021/01/04 15:54	upstream	e71ba945	79264ae3	.config	log	report			info
ci-upstream-kasan-gce-root	2021/01/04 12:07	upstream	e71ba945	79264ae3	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/12/28 10:23	upstream	5c8fe583	2242f77f	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/12/10 17:14	upstream	a2f5ea9e	f900b48c	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/12/09 19:31	upstream	a68a0262	c090b4da	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/12/08 03:34	upstream	cd796ed3	51a9082e	.config	log	report			info
ci-upstream-kasan-gce-root	2020/12/08 01:18	upstream	cd796ed3	51a9082e	.config	log	report			info
ci-upstream-kasan-gce-root	2020/12/07 14:07	upstream	0477e928	1190297f	.config	log	report			info
ci-upstream-kasan-gce-root	2020/12/04 22:43	upstream	e87297fa	20366b87	.config	log	report			info
ci-upstream-kasan-gce-selinux-root	2020/12/03 17:06	upstream	34816d20	e6b0d314	.config	log	report			info
ci-upstream-kasan-gce-root	2020/12/03 12:06	upstream	34816d20	e6b0d314	.config	log	report			info
ci-upstream-kasan-gce-root	2020/11/30 10:29	upstream	b6505459	a0092f9d	.config	log	report			info
ci-upstream-kasan-gce-smack-root	2020/11/24 20:06	upstream	d5beb314	e34b696c	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/11/29 03:11	linux-next	6174f052	a0092f9d	.config	log	report			info