WARNING in io_ring_exit

WARNING in io_ring_exit_work
Status: upstream: reported C repro on 2021/03/15 19:08
Reported-by: syzbot+00e15cda746c5bc70e24@syzkaller.appspotmail.com
First crash: 261d, last: 5h36m

Cause bisection: introduced by (bisect log) :
commit 6c2450ae55656f6b0370bfd4cb52ec8a4ecd0916
Author: Pavel Begunkov <asml.silence@gmail.com>
Date: Tue Feb 23 12:40:22 2021 +0000

io_uring: allocate memory for overflowed CQEs

Crash: WARNING: ODEBUG bug in netdev_run_todo (log)
Repro: C syz .config

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2021/08/06 09:20	18m	asml.silence@gmail.com		git://git.kernel.dk/linux-block io_uring-5.14	OK

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 1182 at fs/io_uring.c:8802 io_ring_exit_work+0x24e/0x1600 fs/io_uring.c:8802
Modules linked in:
CPU: 1 PID: 1182 Comm: kworker/u4:5 Not tainted 5.14.0-rc3-next-20210730-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound io_ring_exit_work
RIP: 0010:io_ring_exit_work+0x24e/0x1600 fs/io_uring.c:8802
Code: 30 11 00 00 48 8b 05 c1 dc 80 09 31 ff 48 8b 2c 24 48 29 c5 48 89 ee e8 c0 a8 95 ff 48 85 ed 0f 89 a8 fe ff ff e8 52 a3 95 ff <0f> 0b e9 9c fe ff ff e8 46 a3 95 ff 48 c7 c2 c0 25 2a 90 48 c7 c6
RSP: 0018:ffffc90004ed7b98 EFLAGS: 00010293
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff88801c921c80 RSI: ffffffff81e014de RDI: 0000000000000003
RBP: ffffffffffffffff R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81e014d0 R11: 0000000000000000 R12: fffffbfff16c1e30
R13: ffffed100e3f4894 R14: ffff888071fa4920 R15: ffff888071fa4000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000488 CR3: 00000001c82cf000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Crashes (1327):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-linux-next-kasan-gce-root	2021/08/06 07:02	linux-next	8d4b477da1a8	d2d6e680	.config	log	report	syz	C		WARNING in io_ring_exit_work
ci-upstream-kasan-gce-root	2021/11/27 18:08	upstream	c5c17547b778	63eeac02	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-selinux-root	2021/11/22 18:31	upstream	136057256686	545ab074	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-selinux-root	2021/11/22 12:29	upstream	136057256686	4eb20a4e	.config	log	report			info	WARNING in io_ring_exit_work
ci-qemu-upstream	2021/11/13 02:31	upstream	7246f4dcaccc	83f5c9b5	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/11/07 15:44	upstream	b5013d084e03	4c1be0be	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-root	2021/11/03 17:37	upstream	dcd68326d29b	4c1be0be	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/11/02 11:17	upstream	e66435936756	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-root	2021/11/02 01:35	upstream	8bb7eca972ad	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-smack-root	2021/10/24 20:30	upstream	6c62666d8879	282f03fb	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-smack-root	2021/10/12 08:58	upstream	fa5878760579	838e7e2c	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/10/08 17:12	upstream	1da38549dd64	efe0f24d	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-smack-root	2021/10/06 12:01	upstream	f6274b06e326	0a63fd36	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/09/30 18:02	upstream	02d5e016800d	be530f6c	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/09/28 06:42	upstream	0513e464f900	78494d16	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/09/04 10:11	upstream	7cca308cfdc0	d236a457	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-smack-root	2021/08/21 06:55	upstream	fa54d366a6e4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/08/19 05:45	upstream	d6d09a694205	a2fe1cb5	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/08/16 18:15	upstream	7c60610d4767	33c26cb7	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce	2021/08/14 07:06	upstream	dfa377c35d70	2489ab88	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-selinux-root	2021/07/30 11:54	upstream	7e96bf476270	c585c7b0	.config	log	report			info	WARNING in io_ring_exit_work
ci-qemu-upstream	2021/07/16 18:36	upstream	d936eb238744	f115ae98	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-386	2021/10/09 15:38	upstream	5d6ab0bb408f	838e7e2c	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-386	2021/10/01 18:05	upstream	4de593fb965f	cc80db95	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-386	2021/09/28 21:19	upstream	d33bec7b3dfa	d82cb927	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-386	2021/09/25 11:40	upstream	7d42e9818258	8cac236e	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-kasan-gce-386	2021/09/17 04:32	upstream	bdb575f87217	5b989942	.config	log	report			info	WARNING in io_ring_exit_work
ci-qemu-upstream-386	2021/07/16 22:17	upstream	d936eb238744	f115ae98	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/11/19 10:42	linux-next	5191249f8803	31a30fc0	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/11/02 06:57	linux-next	bdcc9f6a5682	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/10/31 20:04	linux-next	bdcc9f6a5682	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/10/31 18:15	linux-next	bdcc9f6a5682	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/10/30 11:47	linux-next	bdcc9f6a5682	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/10/30 08:28	linux-next	bdcc9f6a5682	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/10/30 04:09	linux-next	bdcc9f6a5682	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/10/29 21:24	linux-next	bdcc9f6a5682	098b5d53	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/10/13 23:34	linux-next	8006b911c90a	5462d470	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/24 06:11	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/24 04:19	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/24 02:58	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 23:12	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 19:32	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 19:22	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 18:10	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 16:43	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 15:34	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 13:56	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 13:07	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 12:04	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 12:00	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/23 10:53	linux-next	46debfec12b4	b599f2fc	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/12 07:06	linux-next	8ca403f3e7a2	6972b106	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/12 00:59	linux-next	8ca403f3e7a2	6972b106	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/11 23:10	linux-next	8ca403f3e7a2	6972b106	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/11 21:51	linux-next	8ca403f3e7a2	6972b106	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/08/11 19:31	linux-next	8ca403f3e7a2	6972b106	.config	log	report			info	WARNING in io_ring_exit_work
ci-upstream-linux-next-kasan-gce-root	2021/03/11 18:48	linux-next	b01d57bfdc41	c2ca1f2a	.config	log	report			info	WARNING in io_ring_exit_work
ci-qemu2-riscv64	2021/06/02 04:02	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes	18a3c5f7abfd	032639db	.config	log	report			info	WARNING in io_ring_exit_work