WARNING in submit_bio

WARNING in submit_bio_checks
Status: upstream: reported C repro on 2020/07/11 05:34
Reported-by: syzbot+4c50ac32e5b10e4133e1@syzkaller.appspotmail.com
First crash: 469d, last: 1d01h

Cause bisection: introduced by (bisect log) :
commit 449325b52b7a6208f65ed67d3484fd7b7184477b
Author: Alexei Starovoitov <ast@kernel.org>
Date: Tue May 22 02:22:29 2018 +0000

umh: introduce fork_usermode_blob() helper

Crash: KASAN: use-after-free Write in call_usermodehelper_exec_work (log)
Repro: C syz .config

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2020/07/19 17:43	10m	bkkarthik@pesu.pes.edu	patch	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master	report log
2020/07/19 17:40	10m	bkkarthik@pesu.pes.edu	patch	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git master	report log
2020/07/19 14:28	3m	bkkarthik@pesu.pes.edu	patch	linux-next	error
2020/07/16 04:35	9m	bkkarthik@pesu.pes.edu	patch	linux-next	report log
2020/07/16 04:32	9m	bkkarthik@pesu.pes.edu	patch	linux-next	report log

Sample crash report:

------------[ cut here ]------------
Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 0 PID: 2651 at block/blk-core.c:688 bio_check_ro block/blk-core.c:688 [inline]
WARNING: CPU: 0 PID: 2651 at block/blk-core.c:688 submit_bio_checks+0x163a/0x1ac0 block/blk-core.c:801
Modules linked in:
CPU: 1 PID: 2651 Comm: kworker/u4:5 Not tainted 5.15.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-250:0)
RIP: 0010:bio_check_ro block/blk-core.c:688 [inline]
RIP: 0010:submit_bio_checks+0x163a/0x1ac0 block/blk-core.c:801
Code: 00 00 45 0f b6 a4 24 88 05 00 00 48 8d 74 24 60 48 89 ef e8 38 21 fe ff 48 c7 c7 20 19 e2 89 48 89 c6 44 89 e2 e8 82 e8 2e 05 <0f> 0b e9 86 f3 ff ff e8 4a 55 b2 fd e8 75 86 71 05 31 ff 89 c3 89
RSP: 0018:ffffc9000ac57080 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88801bd68e40 RCX: 0000000000000000
RDX: ffff8880250fd580 RSI: ffffffff815daf18 RDI: fffff5200158ae02
RBP: ffff88806f0a7140 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815d4cbe R11: 0000000000000000 R12: 0000000000000000
R13: ffff88806f0a7150 R14: ffff8881444a0bc0 R15: ffff88801bd693b4
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200000c0 CR3: 0000000070a2a000 CR4: 0000000000350ee0
Call Trace:
 submit_bio_noacct+0x81/0xf20 block/blk-core.c:1016
 submit_bio+0x1ea/0x470 block/blk-core.c:1093
 submit_bh_wbc+0x5eb/0x7f0 fs/buffer.c:3054
 __block_write_full_page+0x879/0x1360 fs/buffer.c:1809
 block_write_full_page+0x14d/0x190 fs/buffer.c:2980
 __writepage+0x60/0x180 mm/page-writeback.c:2320
 write_cache_pages+0x754/0x11c0 mm/page-writeback.c:2255
 generic_writepages mm/page-writeback.c:2346 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2335
 do_writepages+0x1ab/0x7b0 mm/page-writeback.c:2364
 __writeback_single_inode+0x126/0xff0 fs/fs-writeback.c:1616
 writeback_sb_inodes+0x53d/0xf00 fs/fs-writeback.c:1881
 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1950
 wb_writeback+0x7f8/0xc30 fs/fs-writeback.c:2055
 wb_check_background_flush fs/fs-writeback.c:2121 [inline]
 wb_do_writeback fs/fs-writeback.c:2209 [inline]
 wb_workfn+0xa4b/0x12d0 fs/fs-writeback.c:2237
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Crashes (1185):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce-root	2021/10/05 10:40	upstream	84b3e42564ac	ce697b49	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/09/04 12:24	upstream	7cca308cfdc0	d236a457	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/08/27 15:44	upstream	77dd11439b86	b318694d	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/08/23 14:47	upstream	e22ce8eb631b	b599f2fc	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/08/23 06:04	upstream	e22ce8eb631b	b599f2fc	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/08/15 18:50	upstream	0aa78d17099b	2489ab88	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/07/15 20:35	upstream	8096acd7442e	b9a2f64e	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/07/15 10:04	upstream	8096acd7442e	b9a2f64e	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/07/11 11:58	upstream	3dbdb38e2869	8f5a7b8c	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/07/02 10:58	upstream	e058a84bfddc	658ebc66	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/06/25 21:19	upstream	44db63d1ad8d	ae6bf8dd	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/06/25 00:50	upstream	4a09d388f2ab	0edbbe31	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/06/20 06:20	upstream	9ed13a17e38e	aba2b2fb	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/17 15:26	upstream	d07f6ca923ea	a2eb125d	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/09 21:54	upstream	b741596468b0	bc5434be	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/28 12:58	upstream	57fa2369ab17	805b5003	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/07 20:23	upstream	2d743660786e	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/04/07 12:17	upstream	2d743660786e	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/04/07 09:44	upstream	2d743660786e	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/03/30 08:17	upstream	1e43c377a79f	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/03/29 07:42	upstream	81b1d39fd39a	a8529b82	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/03/02 23:18	upstream	7a7fd0de4a98	92ead296	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/02/13 16:43	upstream	c6d8570e4d64	98682e5e	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/02/10 06:09	upstream	e0756cfc7d7c	2bd9619f	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/08/03 07:55	linux-next	8d4b477da1a8	6c236867	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/07/27 14:52	linux-next	2265c5286967	fd511809	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/06/11 07:39	linux-next	a1f92694393a	1ba81399	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/05/11 14:18	linux-next	4bf27b1f7330	ca873091	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/05/05 09:06	linux-next	9a9aa07ae18b	06c27ff5	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/04/12 08:03	linux-next	e99d8a849517	bfeda1b1	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/03/29 22:29	linux-next	931294922e65	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce	2020/12/13 14:04	upstream	7b1b868e1d91	bca53db9	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/08/23 00:50	upstream	c3d8f220d012	1da71ab0	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/08/23 00:16	upstream	c3d8f220d012	1da71ab0	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/08/23 00:09	upstream	c3d8f220d012	1da71ab0	.config	log	report	syz	C
ci-upstream-kasan-gce	2020/08/22 14:10	upstream	f873db9acd3c	6436ce4b	.config	log	report	syz	C
ci-upstream-kasan-gce-386	2020/08/23 00:36	upstream	c3d8f220d012	1da71ab0	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/08/24 01:35	linux-next	494d311a82bb	cef5ae68	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/08/21 10:54	linux-next	494d311a82bb	6436ce4b	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/07/07 05:50	linux-next	9e50b94b3eb0	51095195	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/08/21 00:12	linux-next	605cbf3d5f20	1d75fe45	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2021/10/18 04:20	upstream	d999ade1cc86	0c5d9412	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/16 05:37	upstream	8fe31e0995f0	0c5d9412	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/10/14 13:05	upstream	348949d9a444	5462d470	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/10/14 07:16	upstream	348949d9a444	5462d470	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/10/11 12:34	upstream	64570fbc14f8	838e7e2c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/11 09:03	upstream	efb52a7d9511	838e7e2c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/10/10 14:53	upstream	7fd2bf83d59a	838e7e2c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/10 11:43	upstream	7fd2bf83d59a	838e7e2c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/09 07:56	upstream	5d6ab0bb408f	efe0f24d	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/09 03:13	upstream	5d6ab0bb408f	efe0f24d	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/08 13:11	upstream	1da38549dd64	efe0f24d	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/10/06 04:49	upstream	f6274b06e326	0a63fd36	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/10/06 01:51	upstream	f6274b06e326	0a63fd36	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/05 09:36	upstream	84b3e42564ac	ce697b49	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/10/05 03:54	upstream	84b3e42564ac	ce697b49	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/04 19:57	upstream	9e1ff307c779	ce697b49	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/10/03 09:58	upstream	7b66f4393ad4	db0f5787	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/10/03 06:09	upstream	ab2a7a35c4e7	db0f5787	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/10/01 20:14	upstream	24f67d82c43c	cc80db95	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/10/01 18:43	upstream	24f67d82c43c	cc80db95	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/10/01 10:27	upstream	02d5e016800d	1d849ab4	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/10/01 05:15	upstream	4de593fb965f	1d849ab4	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/09/30 23:31	upstream	02d5e016800d	1d849ab4	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/09/30 12:52	upstream	02d5e016800d	be530f6c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/09/29 18:01	upstream	02d5e016800d	be530f6c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/09/28 19:56	upstream	d33bec7b3dfa	d82cb927	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/09/27 04:56	upstream	996148ee05d0	78494d16	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/09/26 19:37	upstream	a3b397b4fffb	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/09/25 07:18	upstream	4c4f0c2bf341	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/09/23 14:00	upstream	58e2cf5d7946	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/09/23 12:09	upstream	cf1d2c3e7e2f	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/09/23 03:09	upstream	cf1d2c3e7e2f	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/09/21 12:42	upstream	d9fb678414c0	169724fe	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu-upstream	2021/08/02 20:33	upstream	c500bee1c5b2	6c236867	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/10/09 20:11	upstream	717478d89fe2	838e7e2c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/10/02 22:00	upstream	ab2a7a35c4e7	db0f5787	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/10/01 16:23	upstream	4de593fb965f	cc80db95	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/09/29 09:38	upstream	a4e6f95a891a	d82cb927	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/09/28 17:51	upstream	d33bec7b3dfa	d82cb927	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/09/26 00:30	upstream	a5e0aceabef6	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/09/25 14:13	upstream	7d42e9818258	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/09/24 04:37	upstream	f9e36107ec70	8cac236e	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/09/22 05:53	upstream	92477dd1faa6	169724fe	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu2-arm32	2021/08/10 04:37	upstream	bf152b0b41dc	6972b106	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu-upstream-386	2021/08/01 23:39	upstream	d4affd6b6e81	6c236867	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu2-arm64-compat	2021/07/12 00:26	upstream	de5540965853	8f5a7b8c	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu2-arm64-mte	2021/04/11 05:35	upstream	95c7b0755187	bfeda1b1	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/10/16 16:19	linux-next	7c832d2f9b95	0c5d9412	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/10/15 11:23	linux-next	7c832d2f9b95	0c5d9412	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/10/11 03:04	linux-next	683f29b781ae	838e7e2c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/10/10 12:46	linux-next	683f29b781ae	838e7e2c	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/10/07 11:05	linux-next	f8dc23b3dc0c	62ee0987	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/10/06 15:42	linux-next	0dda5ee37364	0a63fd36	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/09/29 08:46	linux-next	bf5b1e621a51	d82cb927	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu2-riscv64	2021/06/05 12:45	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes	18a3c5f7abfd	500c2339	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/01/17 05:00	upstream	0da0a8a0a0e1	65a7a854	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/07/07 05:25	linux-next	9e50b94b3eb0	51095195	.config	log	report