KCSAN: data-race in __mark_inode_dirty / writeback_single

KCSAN: data-race in __mark_inode_dirty / writeback_single_inode (3)
Status: moderation: reported on 2020/08/25 07:38
Reported-by: syzbot+fb608ef9b3cacb1fe58e@syzkaller.appspotmail.com
First crash: 95d, last: 8h25m

similar bugs (2):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode			1	318d	318d	0/17	closed as invalid on 2019/11/19 14:44
upstream	KCSAN: data-race in __mark_inode_dirty / writeback_single_inode (2)			18	99d	262d	0/17	closed as invalid on 2020/06/18 14:24

Sample crash report:

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

write to 0xffff8880bb7c1688 of 8 bytes by task 21202 on cpu 1:
 writeback_single_inode+0x102/0x580 fs/fs-writeback.c:1567
 sync_inode fs/fs-writeback.c:2605 [inline]
 sync_inode_metadata+0x52/0x70 fs/fs-writeback.c:2625
 ext4_fsync_nojournal fs/ext4/fsync.c:92 [inline]
 ext4_sync_file+0x335/0x6e0 fs/ext4/fsync.c:170
 vfs_fsync_range+0x107/0x120 fs/sync.c:200
 generic_write_sync include/linux/fs.h:2747 [inline]
 ext4_buffered_write_iter+0x369/0x3b0 fs/ext4/file.c:276
 ext4_file_write_iter+0x768/0x1060 include/linux/fs.h:784
 call_write_iter include/linux/fs.h:1882 [inline]
 do_iter_readv_writev+0x32e/0x3d0 fs/read_write.c:713
 do_iter_write+0x112/0x4b0 fs/read_write.c:1018
 vfs_iter_write+0x4c/0x70 fs/read_write.c:1059
 iter_file_splice_write+0x41a/0x770 fs/splice.c:750
 do_splice_from fs/splice.c:846 [inline]
 direct_splice_actor+0x95/0x160 fs/splice.c:1016
 splice_direct_to_actor+0x365/0x660 fs/splice.c:971
 do_splice_direct+0xf2/0x170 fs/splice.c:1059
 do_sendfile+0x56a/0xba0 fs/read_write.c:1540
 __do_sys_sendfile64 fs/read_write.c:1595 [inline]
 __se_sys_sendfile64 fs/read_write.c:1587 [inline]
 __x64_sys_sendfile64+0xa9/0x130 fs/read_write.c:1587
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff8880bb7c1688 of 8 bytes by task 21198 on cpu 0:
 __mark_inode_dirty+0xb9/0x7f0 fs/fs-writeback.c:2274
 mark_inode_dirty include/linux/fs.h:2169 [inline]
 dquot_alloc_space include/linux/quotaops.h:320 [inline]
 dquot_alloc_block include/linux/quotaops.h:337 [inline]
 ext4_mb_new_blocks+0x7c8/0xcf0 fs/ext4/mballoc.c:4882
 ext4_ext_map_blocks+0x164e/0x20c0 fs/ext4/extents.c:4238
 ext4_map_blocks+0x6bf/0xf40 fs/ext4/inode.c:625
 ext4_iomap_alloc fs/ext4/inode.c:3401 [inline]
 ext4_iomap_begin+0x46e/0x5f0 fs/ext4/inode.c:3440
 iomap_apply+0x8b/0x540 fs/iomap/apply.c:46
 iomap_dio_rw+0x434/0x980 fs/iomap/direct-io.c:506
 ext4_dio_write_iter fs/ext4/file.c:548 [inline]
 ext4_file_write_iter+0xdd5/0x1060 fs/ext4/file.c:658
 call_write_iter include/linux/fs.h:1882 [inline]
 do_iter_readv_writev+0x32e/0x3d0 fs/read_write.c:713
 do_iter_write+0x112/0x4b0 fs/read_write.c:1018
 vfs_iter_write+0x4c/0x70 fs/read_write.c:1059
 iter_file_splice_write+0x41a/0x770 fs/splice.c:750
 do_splice_from fs/splice.c:846 [inline]
 direct_splice_actor+0x95/0x160 fs/splice.c:1016
 splice_direct_to_actor+0x365/0x660 fs/splice.c:971
 do_splice_direct+0xf2/0x170 fs/splice.c:1059
 do_sendfile+0x56a/0xba0 fs/read_write.c:1540
 __do_sys_sendfile64 fs/read_write.c:1601 [inline]
 __se_sys_sendfile64 fs/read_write.c:1587 [inline]
 __x64_sys_sendfile64+0xf2/0x130 fs/read_write.c:1587
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 21198 Comm: syz-executor.0 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================

Crashes (81):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Maintainers
ci2-upstream-kcsan-gce	2020/09/21 21:00	upstream	98477740	9e1fa68e	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/21 09:51	upstream	ba4f184e	c81d99c8	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/20 16:05	upstream	325d0eab	9564d2e9	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/19 22:25	upstream	eb5f95f1	53ce8104	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/19 14:40	upstream	eb5f95f1	53ce8104	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/19 08:06	upstream	92ab97ad	53ce8104	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/18 23:04	upstream	92ab97ad	53ce8104	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/18 20:58	upstream	92ab97ad	53ce8104	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/18 03:10	upstream	4cbffc46	8247808b	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/17 18:08	upstream	5925fa68	8247808b	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/17 07:07	upstream	5925fa68	8247808b	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/16 14:30	upstream	fc4f28bb	77507d02	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/16 07:38	upstream	fc4f28bb	18d7d030	.config	log	report	info	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/14 10:22	upstream	84b13499	2d3cdd63	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/14 03:38	upstream	84b13499	2d3cdd63	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/08 10:16	upstream	f4d51dff	abf9ba4f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/05 00:14	upstream	c70672d8	abf9ba4f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/04 07:07	upstream	59126901	abf9ba4f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/03 20:13	upstream	e28f0104	abf9ba4f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/01 21:00	upstream	b51594df	abf9ba4f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/09/01 06:32	upstream	b51594df	d5a3ae1f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/30 04:37	upstream	1127b219	d5a3ae1f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/29 15:35	upstream	4d41ead6	d5a3ae1f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/27 11:41	upstream	15bc20c6	816e0689	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/27 03:11	upstream	15bc20c6	318430cb	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/26 14:35	upstream	2ac69819	318430cb	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/25 02:59	upstream	6a9dc5fd	344da168	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/23 10:43	upstream	c3d8f220	a6d5f3ad	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/22 20:38	upstream	c3d8f220	1da71ab0	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/22 09:29	upstream	f873db9a	6436ce4b	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/21 07:24	upstream	da2968ff	1d75fe45	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/20 23:31	upstream	da2968ff	70160577	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/20 01:02	upstream	18445bf4	ed282a3a	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/18 02:19	upstream	06a4ec1d	5ce13532	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/17 11:44	upstream	9123e3a7	5ce13532	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/16 20:33	upstream	2cc3c4b3	5ce13532	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/16 12:07	upstream	4b6c093e	5ce13532	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/16 00:38	upstream	410520d0	5ce13532	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/14 18:27	upstream	a1d21081	5ce13532	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/08 23:41	upstream	06a81c1c	f721e4a0	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/08 19:53	upstream	449dc8c9	01975a06	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/08 02:14	upstream	30185b69	ff51e522	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/08/06 20:03	upstream	47ec5303	4ca1c0ea	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/11 13:10	upstream	1df0d896	7ba05d2d	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/10 16:55	upstream	42f82040	56d01184	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/07 08:07	upstream	bfe91da2	42723355	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/06 21:04	upstream	5c82ec00	ef278c73	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/06 07:40	upstream	dcb7fd82	ac5a135b	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/04 09:05	upstream	0c7d7d1f	51095195	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/04 09:01	upstream	0c7d7d1f	51095195	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/04 09:00	upstream	0c7d7d1f	51095195	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/04 08:58	upstream	0c7d7d1f	51095195	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/03 20:38	upstream	cdd3bb54	6e569755	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/07/02 11:56	upstream	cd77006e	f30c14bf	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/06/28 23:36	upstream	91a9a90d	a2cdad9d	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/06/28 16:02	upstream	719fdd32	a2cdad9d	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/06/27 19:38	upstream	6116dea8	a2cdad9d	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/06/19 14:01	upstream	5e857ce6	123cf502	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci2-upstream-kcsan-gce	2020/06/18 22:24	upstream	1b504402	3ea11d3f	.config	log	report		linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk