WARNING in ovl_real_fdget

WARNING in ovl_real_fdget_meta
Status: upstream: reported C repro on 2019/07/24 19:18
Reported-by: syzbot+032bc63605089a199d30@syzkaller.appspotmail.com
First crash: 208d, last: 3d03h

Cause bisection: introduced by (bisect log):

commit 387e3746d01c34457d6a73688acd90428725070b
Author: Amir Goldstein <amir73il@gmail.com>
Date: Fri Jun 7 14:24:38 2019 +0000

locks: eliminate false positive conflicts for write lease

Crash: WARNING in ovl_real_fdget_meta (log)
Repro: C syz .config

Fix bisection: failed (bisect log)

similar bugs (1):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
linux-4.19	WARNING in ovl_real_fdget_meta	C		6	3d03h	37d	0/1	upstream: reported C repro on 2020/01/11 04:27

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 10721 at fs/overlayfs/file.c:55 ovl_change_flags fs/overlayfs/file.c:55 [inline]
WARNING: CPU: 1 PID: 10721 at fs/overlayfs/file.c:55 ovl_real_fdget_meta+0x4a3/0x540 fs/overlayfs/file.c:106
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 10721 Comm: syz-executor441 Not tainted 5.5.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:ovl_change_flags fs/overlayfs/file.c:55 [inline]
RIP: 0010:ovl_real_fdget_meta+0x4a3/0x540 fs/overlayfs/file.c:106
Code: ff 4c 89 f7 e8 de b9 2d ff e9 fb fc ff ff e8 d4 b9 2d ff e9 c7 fc ff ff 4c 89 f7 e8 67 ba 2d ff e9 5e fd ff ff e8 5d fb ef fe <0f> 0b 41 bc fb ff ff ff e9 f9 fc ff ff e8 cb b9 2d ff e9 85 fb ff
RSP: 0018:ffffc90001d57b70 EFLAGS: 00010293
RAX: ffff88808406a640 RBX: 0000000004048000 RCX: ffffffff82852966
RDX: 0000000000000000 RSI: ffffffff82852b93 RDI: 0000000000000005
RBP: ffffc90001d57ba0 R08: ffff88808406a640 R09: 0000000000000000
R10: ffffed1012cb28ae R11: ffff888096594577 R12: 000000000000a000
R13: ffff888096594000 R14: ffff888096594078 R15: ffff88808c87e848
 ovl_real_fdget fs/overlayfs/file.c:113 [inline]
 ovl_read_iter+0x11a/0x370 fs/overlayfs/file.c:238
 call_read_iter include/linux/fs.h:1896 [inline]
 new_sync_read+0x4d7/0x800 fs/read_write.c:414
 __vfs_read+0xe1/0x110 fs/read_write.c:427
 vfs_read+0x1f0/0x440 fs/read_write.c:461
 ksys_read+0x14f/0x290 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read fs/read_write.c:595 [inline]
 __x64_sys_read+0x73/0xb0 fs/read_write.c:595
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4402b9
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffcf6d835d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402b9
RDX: 0000000000001000 RSI: 0000000020000300 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b40
R13: 0000000000401bd0 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (55):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce-selinux-root	2020/01/11 17:55	upstream	bef1d882	4c04afaa	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/11 09:00	upstream	e69ec487	4de4e9f0	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2019/12/25 19:41	upstream	46cf053e	be5c2c81	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2019/12/25 19:39	upstream	46cf053e	be5c2c81	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2019/07/24 09:37	upstream	c6dd78fc	de453f34	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2019/07/24 09:33	upstream	c6dd78fc	de453f34	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2019/07/24 09:02	upstream	c6dd78fc	de453f34	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/01 20:14	linux-next	7ddd09fc	25a0186e	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2019/07/24 09:36	linux-next	6d21a41b	de453f34	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/02/10 15:32	upstream	bb6d3fb3	18847f55	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/27 02:52	upstream	a45ea48e	dd56146d	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/21 22:07	upstream	d96d875e	8eda0b95	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/20 19:37	upstream	def9d278	d2557fb5	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/19 05:51	upstream	244dc268	bc8bc756	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/18 11:27	upstream	25e73aad	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/18 11:27	upstream	25e73aad	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/01/17 14:10	upstream	f4353c3e	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/17 14:09	upstream	f4353c3e	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/17 09:47	upstream	f4353c3e	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/17 09:46	upstream	f4353c3e	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/17 09:42	upstream	f4353c3e	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-qemu-upstream	2020/01/16 18:44	upstream	f5ae2ea6	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/01/16 18:39	upstream	f5ae2ea6	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/16 18:39	upstream	f5ae2ea6	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/01/16 07:00	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/16 06:56	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/16 03:21	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-qemu-upstream	2020/01/16 03:15	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/16 03:14	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/01/16 01:06	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-qemu-upstream	2020/01/16 01:05	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/16 01:04	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/01/16 01:04	upstream	51d69817	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/01/11 04:03	upstream	e69ec487	4de4e9f0	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/01/11 03:22	upstream	e69ec487	4de4e9f0	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2019/08/19 01:51	upstream	3039fadf	55bf8926	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2019/07/24 08:22	upstream	c6dd78fc	de453f34	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/02/14 05:44	linux-next	9f01828e	c5ed587f	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/18 11:22	linux-next	2747d5fd	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/17 12:16	linux-next	2747d5fd	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/17 09:55	linux-next	2747d5fd	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/17 09:54	linux-next	2747d5fd	3de7aabb	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/16 06:54	linux-next	5b483a1a	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/16 01:04	linux-next	5b483a1a	f9b69507	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/11 04:00	linux-next	6c09d7db	4de4e9f0	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/01/11 03:20	linux-next	6c09d7db	4de4e9f0	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2019/07/29 08:39	linux-next	fde50b96	c85e1c5b	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu