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: 307d, last: 3h39m

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 loop0 (partno 0)
WARNING: CPU: 0 PID: 8456 at block/blk-core.c:704 bio_check_ro block/blk-core.c:704 [inline]
WARNING: CPU: 0 PID: 8456 at block/blk-core.c:704 submit_bio_checks+0x165c/0x1aa0 block/blk-core.c:817
Modules linked in:
CPU: 1 PID: 8456 Comm: syz-executor820 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bio_check_ro block/blk-core.c:704 [inline]
RIP: 0010:submit_bio_checks+0x165c/0x1aa0 block/blk-core.c:817
Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 56 35 fe ff 48 c7 c7 a0 50 c0 89 48 89 c6 44 89 e2 e8 a1 ed 1b 05 <0f> 0b e9 36 f3 ff ff e8 f8 2a bb fd 0f 0b e9 bf f1 ff ff e8 ec 2a
RSP: 0018:ffffc900016370c8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88801eead120 RCX: 0000000000000000
RDX: ffff88802f1f0340 RSI: ffffffff815bfe35 RDI: fffff520002c6e0b
RBP: ffff88801e893e80 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815b9c6e R11: 0000000000000000 R12: 0000000000000000
R13: ffff88801e893e90 R14: ffff88801b5a8040 R15: ffff88801eead624
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b3060e000 CR3: 000000002aaa5000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bio_noacct+0x81/0xf20 block/blk-core.c:1032
 submit_bio+0x263/0x5e0 block/blk-core.c:1118
 submit_bh_wbc+0x5eb/0x7f0 fs/buffer.c:3075
 __block_write_full_page+0x86c/0x1340 fs/buffer.c:1830
 block_write_full_page+0x14d/0x190 fs/buffer.c:3001
 __writepage+0x60/0x180 mm/page-writeback.c:2311
 write_cache_pages+0x759/0x11a0 mm/page-writeback.c:2246
 generic_writepages mm/page-writeback.c:2337 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2326
 do_writepages+0xec/0x290 mm/page-writeback.c:2352
 __filemap_fdatawrite_range+0x2a5/0x390 mm/filemap.c:413
 filemap_write_and_wait_range mm/filemap.c:686 [inline]
 filemap_write_and_wait_range+0x65/0x100 mm/filemap.c:680
 filemap_write_and_wait include/linux/fs.h:2892 [inline]
 __sync_blockdev fs/block_dev.c:526 [inline]
 sync_blockdev fs/block_dev.c:535 [inline]
 __blkdev_put+0x64b/0x790 fs/block_dev.c:1569
 blkdev_put+0x92/0x580 fs/block_dev.c:1638
 blkdev_close+0x8c/0xb0 fs/block_dev.c:1646
 __fput+0x288/0x920 fs/file_table.c:280
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0xbfc/0x2a60 kernel/exit.c:826
 do_group_exit+0x125/0x310 kernel/exit.c:923
 get_signal+0x47f/0x2150 kernel/signal.c:2818
 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:789
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
 exit_to_user_mode_prepare+0x171/0x280 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:301
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:57
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x452519
Code: Unable to access opcode bytes at RIP 0x4524ef.
RSP: 002b:00007ff51b73d2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00000000004cd4d0 RCX: 0000000000452519
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00000000004cd4dc
RBP: 00000000004cd4dc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 000000000049c498
R13: 6f6f6c2f7665642f R14: f821000000006cf9 R15: 00000000004cd4d8

Crashes (634):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce-selinux-root	2021/05/09 21:54	upstream	b7415964	bc5434be	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/28 12:58	upstream	57fa2369	805b5003	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/07 20:23	upstream	2d743660	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/04/07 12:17	upstream	2d743660	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/04/07 09:44	upstream	2d743660	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/03/30 08:17	upstream	1e43c377	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/03/29 07:42	upstream	81b1d39f	a8529b82	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/03/02 23:18	upstream	7a7fd0de	92ead296	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/02/13 16:43	upstream	c6d8570e	98682e5e	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/02/10 06:09	upstream	e0756cfc	2bd9619f	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/05/05 09:06	linux-next	9a9aa07a	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	e99d8a84	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	93129492	6a81331a	.config	log	report	syz	C		WARNING in submit_bio_checks
ci-upstream-kasan-gce	2020/12/13 14:04	upstream	7b1b868e	bca53db9	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/08/23 00:50	upstream	c3d8f220	1da71ab0	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/08/23 00:16	upstream	c3d8f220	1da71ab0	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/08/23 00:09	upstream	c3d8f220	1da71ab0	.config	log	report	syz	C
ci-upstream-kasan-gce	2020/08/22 14:10	upstream	f873db9a	6436ce4b	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/08/20 09:53	upstream	7eac66d0	ed282a3a	.config	log	report	syz	C
ci-upstream-kasan-gce	2020/08/19 21:23	upstream	18445bf4	94b45706	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/08/19 06:15	upstream	18445bf4	e1c29030	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/08/17 14:57	upstream	2cc3c4b3	424dd8e7	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/08/16 07:27	upstream	4b6c093e	424dd8e7	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/08/14 23:01	upstream	a1d21081	424dd8e7	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/08/14 12:41	upstream	a1d21081	424dd8e7	.config	log	report	syz	C
ci-upstream-kasan-gce-386	2020/08/23 00:36	upstream	c3d8f220	1da71ab0	.config	log	report	syz	C
ci-upstream-kasan-gce-386	2020/08/20 02:29	upstream	18445bf4	94b45706	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/08/24 01:35	linux-next	494d311a	cef5ae68	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/08/21 10:54	linux-next	494d311a	6436ce4b	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/08/18 04:50	linux-next	0f1fa584	424dd8e7	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/07/07 05:50	linux-next	9e50b94b	51095195	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/08/19 12:54	upstream	18445bf4	e1c29030	.config	log	report	syz
ci-upstream-kasan-gce-selinux-root	2020/08/17 23:44	upstream	9123e3a7	424dd8e7	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2020/08/17 09:07	upstream	2cc3c4b3	424dd8e7	.config	log	report	syz
ci-upstream-linux-next-kasan-gce-root	2020/08/21 00:12	linux-next	605cbf3d	1d75fe45	.config	log	report	syz
ci-upstream-kasan-gce-root	2021/05/10 09:44	upstream	6efb943b	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/10 01:27	upstream	6efb943b	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/09 13:40	upstream	b7415964	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/09 12:12	upstream	b7415964	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/09 07:22	upstream	ab159ac5	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/05/09 05:27	upstream	ab159ac5	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/08 18:54	upstream	ab159ac5	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/08 04:42	upstream	d2b6f8a1	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/05/08 03:41	upstream	d2b6f8a1	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/08 00:52	upstream	d2b6f8a1	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/07 14:52	upstream	d2b6f8a1	f6da8120	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/06 21:08	upstream	d2b6f8a1	06585184	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/05/06 06:04	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/06 04:59	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/06 03:21	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/05/06 00:12	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/05/05 21:35	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/05 13:13	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/05 02:49	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/04 23:21	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/04 10:06	upstream	d2b6f8a1	09efdd63	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/04 07:40	upstream	d2b6f8a1	09efdd63	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/04 06:56	upstream	d2b6f8a1	09efdd63	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/03 21:38	upstream	d2b6f8a1	ad61f371	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/03 09:39	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/03 08:28	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/03 02:09	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/05/03 00:01	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/02 13:54	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/02 13:40	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/05/02 11:04	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/05/02 06:43	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/05/01 08:42	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/04/30 15:19	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/30 01:41	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/04/29 23:28	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/04/29 21:06	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/29 11:03	upstream	d72cd4ad	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/04/29 09:52	upstream	d72cd4ad	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce	2021/04/29 03:52	upstream	acd3d285	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/28 00:55	upstream	57fa2369	805b5003	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/04/27 17:48	upstream	4a0225c3	805b5003	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-smack-root	2021/04/27 15:30	upstream	4a0225c3	805b5003	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-root	2021/04/27 13:29	upstream	4a0225c3	805b5003	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu-upstream	2021/01/31 23:30	upstream	6642d600	fc9fd31e	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu-upstream-386	2021/05/10 16:02	upstream	6efb943b	ca873091	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/05/10 13:14	upstream	6efb943b	ca873091	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/05/09 14:56	upstream	b7415964	bc5434be	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/05/05 05:28	upstream	d2b6f8a1	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/05/04 15:39	upstream	d2b6f8a1	09efdd63	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/05/04 00:33	upstream	d2b6f8a1	ad61f371	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/05/03 01:07	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-386	2021/05/02 17:50	upstream	d2b6f8a1	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu-upstream-386	2021/04/21 01:36	upstream	1fe5501b	c0ced557	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu2-arm32	2021/04/16 11:30	upstream	bf152b0b	c59079a6	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu2-arm64-mte	2021/04/11 05:35	upstream	95c7b075	bfeda1b1	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/05/06 09:10	linux-next	23c49842	06c27ff5	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/05/04 12:13	linux-next	9a9aa07a	09efdd63	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/05/04 08:42	linux-next	9a9aa07a	09efdd63	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-linux-next-kasan-gce-root	2021/05/04 05:17	linux-next	9a9aa07a	09efdd63	.config	log	report			info	WARNING in submit_bio_checks
ci-qemu2-riscv64	2021/05/03 12:44	git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes	18a3c5f7	77e2b668	.config	log	report			info	WARNING in submit_bio_checks
ci-upstream-kasan-gce-selinux-root	2021/01/17 05:00	upstream	0da0a8a0	65a7a854	.config	log	report			info
ci-upstream-linux-next-kasan-gce-root	2020/07/07 05:25	linux-next	9e50b94b	51095195	.config	log	report