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: 378d, last: 72d

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		16	12d	207d	0/1	upstream: reported C repro on 2020/01/11 04:27

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2019/07/26 16:31	19m	amir73il@gmail.com		https://github.com/amir73il/linux.git ovl-check-nested-overlap	error

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 7035 at fs/overlayfs/file.c:66 ovl_change_flags fs/overlayfs/file.c:66 [inline]
WARNING: CPU: 1 PID: 7035 at fs/overlayfs/file.c:66 ovl_real_fdget_meta+0x49c/0x530 fs/overlayfs/file.c:117
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7035 Comm: syz-executor073 Not tainted 5.7.0-rc2-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+0x188/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x35 kernel/panic.c:582
 report_bug+0x27b/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:175 [inline]
 fixup_bug arch/x86/kernel/traps.c:170 [inline]
 do_error_trap+0x12b/0x220 arch/x86/kernel/traps.c:267
 do_invalid_op+0x32/0x40 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:66 [inline]
RIP: 0010:ovl_real_fdget_meta+0x49c/0x530 fs/overlayfs/file.c:117
Code: ff 4c 89 ff e8 25 de 2d ff e9 ff fc ff ff e8 1b de 2d ff e9 c5 fc ff ff 4c 89 f7 e8 7e de 2d ff e9 5d fd ff ff e8 54 17 f0 fe <0f> 0b 41 bd fb ff ff ff e9 fd fc ff ff e8 02 de 2d ff e9 84 fb ff
RSP: 0018:ffffc90000f17ba0 EFLAGS: 00010293
RAX: ffff8880945bc280 RBX: 0000000000002000 RCX: ffffffff82831529
RDX: 0000000000000000 RSI: ffffffff8283175c RDI: 0000000000000005
RBP: 0000000004068002 R08: ffff8880945bc280 R09: ffffed1014180d21
R10: ffff8880a0c06903 R11: ffffed1014180d20 R12: ffff8880a2ef55c0
R13: ffff888084a15738 R14: 000000000002a002 R15: ffff8880a2ef5640
 ovl_real_fdget fs/overlayfs/file.c:124 [inline]
 ovl_write_iter+0x3da/0x11a0 fs/overlayfs/file.c:331
 call_write_iter include/linux/fs.h:1907 [inline]
 new_sync_write+0x4a2/0x700 fs/read_write.c:484
 __vfs_write+0xc9/0x100 fs/read_write.c:497
 vfs_write+0x268/0x5d0 fs/read_write.c:559
 ksys_write+0x12d/0x250 fs/read_write.c:612
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x440309
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:00007ffdecf014b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309
RDX: 0000000000000001 RSI: 0000000020000340 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90
R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (101):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kasan-gce-selinux-root	2020/04/22 20:18	upstream	18bf3408	2e44d63e	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/04/22 18:41	upstream	18bf3408	2e44d63e	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/04/21 07:16	upstream	ae83d0b4	98a9f9e6	.config	log	report	syz	C	linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
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	2020/04/23 21:10	linux-next	ac935d22	2e44d63e	.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	2020/05/25 18:45	upstream	9cb1fd0e	30927cd7	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/05/25 18:43	upstream	9cb1fd0e	30927cd7	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/05/20 19:08	upstream	115a5416	1255f02a	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/05/20 06:56	upstream	3c9e6656	67fa1f59	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/05/20 01:23	upstream	3c9e6656	67fa1f59	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/05/18 08:35	upstream	b9bbe6ed	37bccd4e	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/05/14 08:03	upstream	24085f70	a885920d	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/05/04 04:10	upstream	262f7a6b	58ae5e18	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/04/08 00:23	upstream	763dede1	db9bcd4b	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/04/07 14:14	upstream	7e634208	99a96044	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/03/11 13:28	upstream	e9414845	35f53e45	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/03/11 04:54	upstream	f35111a9	35f53e45	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/03/02 04:25	upstream	63623fd4	c88c7b75	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-selinux-root	2020/02/29 05:04	upstream	f8788d86	59b57593	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/02/27 03:28	upstream	f8788d86	59b57593	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-smack-root	2020/02/23 13:50	upstream	54dedb5b	2c36e7a7	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/02/18 21:43	upstream	b1da3acc	012fbc32	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-kasan-gce-root	2020/02/17 09:42	upstream	11a48a5a	1f448cd6	.config	log	report			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-linux-next-kasan-gce-root	2020/05/23 04:04	linux-next	c11d28ab	9682898d	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/04/07 19:47	linux-next	5fab5442	db9bcd4b	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/02/29 00:18	linux-next	bdc5461b	59b57593	.config	log	report			linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu
ci-upstream-linux-next-kasan-gce-root	2020/02/24 11:28	linux-next	bdc5461b	d801cb02	.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