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: 399d, last: 2d00h

Sample crash report:

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

write to 0xffff888132c0e748 of 8 bytes by task 2259 on cpu 0:
 __mark_inode_dirty+0x1c4/0x680 fs/fs-writeback.c:2430
 mark_inode_dirty include/linux/fs.h:2403 [inline]
 ext4_setattr+0x5f7/0xec0 fs/ext4/inode.c:5514
 notify_change+0x8a3/0xa80 fs/attr.c:398
 do_truncate fs/open.c:64 [inline]
 do_sys_ftruncate+0x405/0x4c0 fs/open.c:196
 __do_sys_ftruncate fs/open.c:207 [inline]
 __se_sys_ftruncate fs/open.c:205 [inline]
 __x64_sys_ftruncate+0x2f/0x40 fs/open.c:205
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888132c0e748 of 8 bytes by task 2251 on cpu 1:
 inode_is_dirtytime_only include/linux/fs.h:2422 [inline]
 __ext4_update_other_inode_time+0x48/0x5c0 fs/ext4/inode.c:4963
 ext4_update_other_inodes_time fs/ext4/inode.c:5006 [inline]
 ext4_do_update_inode fs/ext4/inode.c:5135 [inline]
 ext4_mark_iloc_dirty+0x12b6/0x1750 fs/ext4/inode.c:5724
 __ext4_mark_inode_dirty+0x4db/0x5b0 fs/ext4/inode.c:5918
 ext4_dirty_inode+0x86/0xa0 fs/ext4/inode.c:5947
 __mark_inode_dirty+0x77/0x680 fs/fs-writeback.c:2395
 mark_inode_dirty include/linux/fs.h:2403 [inline]
 generic_write_end+0x157/0x180 fs/buffer.c:2198
 ext4_da_write_end+0x59b/0x730 fs/ext4/inode.c:3110
 generic_perform_write+0x22a/0x3c0 mm/filemap.c:3667
 ext4_buffered_write_iter+0x2f2/0x3f0 fs/ext4/file.c:269
 ext4_file_write_iter+0x2e7/0x11d0 fs/ext4/file.c:519
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x69d/0x770 fs/read_write.c:605
 ksys_write+0xce/0x180 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x3e/0x50 fs/read_write.c:667
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0000000000000000 -> 0x0000000000000007

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2251 Comm: syz-executor.0 Not tainted 5.14.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (108):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/07/22 11:37	upstream	3d5895cd3517	241790bb	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/19 23:08	upstream	2734d6c1b1a0	bc48c9ab	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/07/16 04:06	upstream	dd9c7df94c1b	f115ae98	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/26 05:09	upstream	b7050b242430	ae6bf8dd	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/15 18:41	upstream	94f0b2d4a1d0	8022d7e3	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/13 21:47	upstream	e4e453434a19	1ba81399	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/12 15:57	upstream	ad347abe4a98	1ba81399	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/11 01:41	upstream	f09eacca59d2	1ba81399	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/09 08:00	upstream	368094df48e6	5c2fe346	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/06/07 07:32	upstream	614124bea77e	e59537be	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/30 07:36	upstream	b90e90f40b4f	325a8dab	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/28 19:39	upstream	5ff2756afde0	858ea628	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/28 02:24	upstream	97e5bf604b7a	858ea628	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/27 12:47	upstream	d7c5303fbc8a	858ea628	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/26 23:01	upstream	7ac3a1c1ae51	858ea628	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/26 10:38	upstream	ad9f25d33860	750ce164	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/25 17:35	upstream	a050a6d2b7e8	93d3a9f6	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/21 14:34	upstream	79a106fc6585	3c7fef33	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/17 23:13	upstream	8ac91e6c6033	a343ba6b	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/11 02:04	upstream	1140ab592e2e	ca873091	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/10 13:28	upstream	6efb943b8616	ca873091	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/05/09 21:09	upstream	9819f682e48c	bc5434be	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/28 22:11	upstream	68a32ba14177	77e2b668	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/24 18:06	upstream	2a1d7946fa53	17f0b706	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/21 18:25	upstream	16fc44d6387e	95777977	.config	log	report	info	KCSAN: data-race in __ext4_update_other_inode_time / __mark_inode_dirty
ci2-upstream-kcsan-gce	2021/04/21 00:14	upstream	1fe5501ba1ab	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	194cf4825638	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	9cdbf6467424	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	7e25f40eab52	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	7e25f40eab52	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	8b12a62a4e3e	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	1df27313f50a	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	88fe49249c99	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	f40ddce88593	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	c6d8570e4d64	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	dcc0b49040c7	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	65f0d2414b70	468dbb55	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/06 12:07	upstream	9f1abbe97c08	fff20c29	.config	log	report	info
ci2-upstream-kcsan-gce	2021/01/05 23:34	upstream	6207214a70bf	b1c228e1	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/25 11:01	upstream	71c5f03154ac	b982b3ea	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/24 22:56	upstream	3913d00ac51a	c2c1d1dd	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/21 10:34	upstream	e37b12e4bb21	04201c06	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/15 19:14	upstream	148842c98a24	f213e07e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/10 11:54	upstream	a2f5ea9e314b	2a55c22b	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/07 20:48	upstream	cd796ed33450	51a9082e	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/07 09:03	upstream	0477e9288185	f80ce148	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/06 20:26	upstream	8100a58044f8	c521566d	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/04 18:46	upstream	e87297fa080a	20366b87	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/02 22:42	upstream	3bb61aa61828	eff43e99	.config	log	report	info
ci2-upstream-kcsan-gce	2020/12/02 00:34	upstream	b65054597872	c42a35e9	.config	log	report	info
ci2-upstream-kcsan-gce	2020/11/02 12:01	upstream	3cea11cd5e3b	8bc4594f	.config	log	report	info
ci2-upstream-kcsan-gce	2020/06/20 11:59	upstream	672f9255a727	c655ec77	.config	log	report