KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode

KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
Status: moderation: reported on 2020/11/03 08:44
Reported-by: syzbot+b21fe66a80c277eb3330@syzkaller.appspotmail.com
First crash: 304d, last: 8h49m

Sample crash report:

==================================================================
BUG: KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty

write to 0xffff888105f3a7d0 of 8 bytes by task 12607 on cpu 1:
 __mark_inode_dirty+0x1ef/0x6c0 fs/fs-writeback.c:2312
 mark_inode_dirty include/linux/fs.h:2267 [inline]
 dquot_alloc_space include/linux/quotaops.h:317 [inline]
 dquot_alloc_block include/linux/quotaops.h:334 [inline]
 ext4_mb_new_blocks+0x113b/0x1f60 fs/ext4/mballoc.c:4944
 ext4_ext_map_blocks+0x1569/0x1f00 fs/ext4/extents.c:4238
 ext4_map_blocks+0x70d/0xef0 fs/ext4/inode.c:638
 ext4_iomap_alloc fs/ext4/inode.c:3428 [inline]
 ext4_iomap_begin+0x4a3/0x620 fs/ext4/inode.c:3478
 iomap_apply+0x8d/0x400 fs/iomap/apply.c:46
 __iomap_dio_rw+0x4c4/0xa10 fs/iomap/direct-io.c:553
 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:641
 ext4_dio_write_iter fs/ext4/file.c:551 [inline]
 ext4_file_write_iter+0xa04/0x11d0 fs/ext4/file.c:661
 call_write_iter include/linux/fs.h:1977 [inline]
 do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740
 do_iter_write+0x112/0x4c0 fs/read_write.c:866
 vfs_iter_write+0x4c/0x70 fs/read_write.c:907
 iter_file_splice_write+0x40a/0x750 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0xf5/0x170 fs/splice.c:979
 do_sendfile+0x773/0xda0 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311
 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888105f3a7d0 of 8 bytes by task 12598 on cpu 0:
 inode_is_dirtytime_only include/linux/fs.h:2286 [inline]
 __ext4_update_other_inode_time+0x48/0x5c0 fs/ext4/inode.c:4965
 ext4_update_other_inodes_time fs/ext4/inode.c:5008 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5137 [inline]
 ext4_mark_iloc_dirty+0x12e6/0x1750 fs/ext4/inode.c:5726
 __ext4_mark_inode_dirty+0x4db/0x5b0 fs/ext4/inode.c:5920
 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5949
 __mark_inode_dirty+0x77/0x6c0 fs/fs-writeback.c:2274
 mark_inode_dirty include/linux/fs.h:2267 [inline]
 dquot_alloc_space include/linux/quotaops.h:317 [inline]
 dquot_alloc_block include/linux/quotaops.h:334 [inline]
 ext4_mb_new_blocks+0x113b/0x1f60 fs/ext4/mballoc.c:4944
 ext4_ext_map_blocks+0x1569/0x1f00 fs/ext4/extents.c:4238
 ext4_map_blocks+0x70d/0xef0 fs/ext4/inode.c:638
 ext4_iomap_alloc fs/ext4/inode.c:3428 [inline]
 ext4_iomap_begin+0x4a3/0x620 fs/ext4/inode.c:3478
 iomap_apply+0x8d/0x400 fs/iomap/apply.c:46
 __iomap_dio_rw+0x4c4/0xa10 fs/iomap/direct-io.c:553
 iomap_dio_rw+0x30/0x70 fs/iomap/direct-io.c:641
 ext4_dio_write_iter fs/ext4/file.c:551 [inline]
 ext4_file_write_iter+0xa04/0x11d0 fs/ext4/file.c:661
 call_write_iter include/linux/fs.h:1977 [inline]
 do_iter_readv_writev+0x2cb/0x360 fs/read_write.c:740
 do_iter_write+0x112/0x4c0 fs/read_write.c:866
 vfs_iter_write+0x4c/0x70 fs/read_write.c:907
 iter_file_splice_write+0x40a/0x750 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0xf5/0x170 fs/splice.c:979
 do_sendfile+0x773/0xda0 fs/read_write.c:1260
 __do_sys_sendfile64 fs/read_write.c:1325 [inline]
 __se_sys_sendfile64 fs/read_write.c:1311 [inline]
 __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1311
 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12598 Comm: syz-executor.4 Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
syz-executor.4 (12598) used greatest stack depth: 10032 bytes left

Crashes (83):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/04/21 00:14	upstream	1fe5501b	c0ced557	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/17 20:27	upstream	194cf482	7e2b734b	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/17 07:46	upstream	9cdbf646	7e2b734b	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/16 12:23	upstream	7e25f40e	7e2b734b	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/16 06:16	upstream	7e25f40e	c59079a6	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/03/19 11:56	upstream	8b12a62a	2af9d324	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/03/16 22:29	upstream	1df27313	fdb2bb2c	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/03/14 20:17	upstream	88fe4924	cc1cff8f	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/02/17 19:14	upstream	f40ddce8	14052202	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/02/13 10:02	upstream	c6d8570e	98682e5e	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/02/12 08:33	upstream	dcc0b490	a5f86b15	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/01/14 16:09	upstream	65f0d241	468dbb55	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/06 12:07	upstream	9f1abbe9	fff20c29	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/05 23:34	upstream	6207214a	b1c228e1	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/25 11:01	upstream	71c5f031	b982b3ea	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/24 22:56	upstream	3913d00a	c2c1d1dd	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/21 10:34	upstream	e37b12e4	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/15 19:14	upstream	148842c9	f213e07e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/10 11:54	upstream	a2f5ea9e	2a55c22b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/07 20:48	upstream	cd796ed3	51a9082e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/07 09:03	upstream	0477e928	f80ce148	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/06 20:26	upstream	8100a580	c521566d	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/04 18:46	upstream	e87297fa	20366b87	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/02 22:42	upstream	3bb61aa6	eff43e99	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/02 00:34	upstream	b6505459	c42a35e9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/29 15:43	upstream	aae5ab85	a0092f9d	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/28 02:19	upstream	c84e1efa	486f93ef	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/25 20:49	upstream	fa02fcd9	3f581b43	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/24 16:49	upstream	d5beb314	e34b696c	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/16 10:49	upstream	09162bc3	1bf9a662	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/05 21:47	upstream	521b619a	cba33199	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/02 12:01	upstream	3cea11cd	8bc4594f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/01 02:49	upstream	c2dc4c07	8bc4594f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/27 12:26	upstream	4525c878	94942294	.config	log	report	info
ci2-upstream-kcsan-gce	2020/10/23 12:49	upstream	f9893351	4e740c00	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/28 13:39	upstream	a1b8638b	6bfdbe89	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/21 09:09	upstream	ba4f184e	c81d99c8	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/20 12:22	upstream	325d0eab	53ce8104	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/18 01:18	upstream	4cbffc46	8247808b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/17 22:32	upstream	4cbffc46	8247808b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/17 10:25	upstream	5925fa68	8247808b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/09/09 06:28	upstream	34d4ddd3	0ea7a887	.config	log	report
ci2-upstream-kcsan-gce	2020/09/07 16:44	upstream	f4d51dff	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/09/04 23:16	upstream	c70672d8	abf9ba4f	.config	log	report
ci2-upstream-kcsan-gce	2020/08/26 11:31	upstream	2ac69819	318430cb	.config	log	report
ci2-upstream-kcsan-gce	2020/08/25 02:16	upstream	6a9dc5fd	344da168	.config	log	report
ci2-upstream-kcsan-gce	2020/07/01 12:28	upstream	7c30b859	090d8f7b	.config	log	report
ci2-upstream-kcsan-gce	2020/06/30 21:52	upstream	7c30b859	c0383ebe	.config	log	report
ci2-upstream-kcsan-gce	2020/06/29 19:31	upstream	7c30b859	ce9ef6f2	.config	log	report
ci2-upstream-kcsan-gce	2020/06/27 09:07	upstream	1590a2e1	032b4239	.config	log	report
ci2-upstream-kcsan-gce	2020/06/27 04:35	upstream	1590a2e1	ffec44b5	.config	log	report
ci2-upstream-kcsan-gce	2020/06/27 03:32	upstream	1590a2e1	ffec44b5	.config	log	report
ci2-upstream-kcsan-gce	2020/06/26 04:00	upstream	4a21185c	aea82c00	.config	log	report
ci2-upstream-kcsan-gce	2020/06/25 14:13	upstream	8be3a53e	c7b4497a	.config	log	report
ci2-upstream-kcsan-gce	2020/06/25 11:34	upstream	8be3a53e	c7b4497a	.config	log	report
ci2-upstream-kcsan-gce	2020/06/25 10:25	upstream	8be3a53e	c7b4497a	.config	log	report
ci2-upstream-kcsan-gce	2020/06/24 03:06	upstream	3e08a952	bbad15ae	.config	log	report
ci2-upstream-kcsan-gce	2020/06/24 02:05	upstream	3e08a952	bbad15ae	.config	log	report
ci2-upstream-kcsan-gce	2020/06/23 16:08	upstream	dd0d7181	54566aff	.config	log	report
ci2-upstream-kcsan-gce	2020/06/20 11:59	upstream	672f9255	c655ec77	.config	log	report