KCSAN: data-race in __find_get_block / has_bh_in

KCSAN: data-race in __find_get_block / has_bh_in_lru
Status: moderation: reported on 2020/02/03 02:48
Reported-by: syzbot+aa6de90d54fa7c0888ad@syzkaller.appspotmail.com
First crash: 651d, last: 12m

Sample crash report:

loop3: detected capacity change from 0 to 768
==================================================================
BUG: KCSAN: data-race in __find_get_block / has_bh_in_lru

write to 0xffff888237d42f10 of 8 bytes by task 6568 on cpu 1:
 bh_lru_install fs/buffer.c:1251 [inline]
 __find_get_block+0x3d0/0x900 fs/buffer.c:1310
 sb_find_get_block include/linux/buffer_head.h:340 [inline]
 recently_deleted fs/ext4/ialloc.c:687 [inline]
 find_inode_bit+0x181/0x330 fs/ext4/ialloc.c:729
 __ext4_new_inode+0xc7a/0x2f70 fs/ext4/ialloc.c:1064
 ext4_symlink+0x2c3/0x700 fs/ext4/namei.c:3465
 vfs_symlink+0x23a/0x300 fs/namei.c:4182
 do_symlinkat+0xeb/0x280 fs/namei.c:4212
 __do_sys_symlink fs/namei.c:4233 [inline]
 __se_sys_symlink fs/namei.c:4231 [inline]
 __x64_sys_symlink+0x32/0x40 fs/namei.c:4231
 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 0xffff888237d42f10 of 8 bytes by task 6572 on cpu 0:
 has_bh_in_lru+0x31/0x1c0 fs/buffer.c:1415
 smp_call_function_many_cond+0x226/0x620 kernel/smp.c:915
 on_each_cpu_cond_mask+0x31/0x40 kernel/smp.c:1133
 on_each_cpu_cond include/linux/smp.h:105 [inline]
 invalidate_bh_lrus+0x26/0x30 fs/buffer.c:1424
 kill_bdev fs/block_dev.c:85 [inline]
 set_blocksize+0x242/0x270 fs/block_dev.c:166
 sb_set_blocksize+0x2c/0xa0 fs/block_dev.c:175
 ext4_fill_super+0x2233/0x7ff0 fs/ext4/super.c:4468
 mount_bdev+0x1e8/0x290 fs/super.c:1368
 ext4_mount+0x2d/0x40 fs/ext4/super.c:6638
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1498
 do_new_mount fs/namespace.c:2905 [inline]
 path_mount+0x11d4/0x1ce0 fs/namespace.c:3235
 do_mount fs/namespace.c:3248 [inline]
 __do_sys_mount fs/namespace.c:3456 [inline]
 __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3433
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3433
 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: 0xffff888106230ea0 -> 0xffff88810625f068

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 6572 Comm: syz-executor.3 Not tainted 5.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
EXT4-fs error (device loop3): ext4_ext_check_inode:459: inode #4: comm syz-executor.3: pblk 0 bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0)
EXT4-fs error (device loop3): ext4_quota_enable:6438: comm syz-executor.3: Bad quota inode # 4
EXT4-fs warning (device loop3): ext4_enable_quotas:6478: Failed to enable quota tracking (type=1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop3): mount failed

Crashes (621):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-kcsan-gce	2021/08/05 17:35	upstream	251a1524293d	d2d6e680	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/08/05 05:16	upstream	251a1524293d	7f7bb950	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/08/04 21:53	upstream	251a1524293d	b97d64c9	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/08/04 17:26	upstream	d5ad8ec3cfb5	b97d64c9	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/08/03 21:56	upstream	d5ad8ec3cfb5	6c236867	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/08/02 10:55	upstream	c500bee1c5b2	6c236867	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/08/01 20:28	upstream	d4affd6b6e81	6c236867	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/08/01 00:23	upstream	f3438b4c4e69	6c236867	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/31 10:15	upstream	c7d102232649	6c236867	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/30 19:57	upstream	4669e13cd67f	6c236867	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/30 06:23	upstream	764a5bc89b12	c585c7b0	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/30 05:03	upstream	7e96bf476270	c585c7b0	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/29 18:37	upstream	7e96bf476270	8a799410	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/29 07:12	upstream	4010a528219e	b44001ce	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/28 20:09	upstream	4010a528219e	9a4781d4	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/28 17:37	upstream	7d549995d4e0	9a4781d4	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/28 00:04	upstream	7d549995d4e0	17d6ab15	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/27 15:48	upstream	ff1176468d36	17d6ab15	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/26 07:05	upstream	ff1176468d36	fd511809	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/26 02:46	upstream	ff1176468d36	4d1b57d4	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/25 15:47	upstream	d8079fac1681	4d1b57d4	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/25 15:42	upstream	d8079fac1681	4d1b57d4	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/25 01:19	upstream	7ffca2bb9d8b	4d1b57d4	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/24 11:32	upstream	f0fddcec6b62	4d1b57d4	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/24 05:03	upstream	f0fddcec6b62	bc5f1d88	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/23 16:53	upstream	8baef6386baa	bc5f1d88	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/23 03:14	upstream	9bead1b58c4c	bc5f1d88	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/22 12:53	upstream	3d5895cd3517	241790bb	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/21 20:21	upstream	7b6ae471e541	29c3f20f	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/21 14:30	upstream	8cae8cd89f05	29c3f20f	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/19 23:47	upstream	2734d6c1b1a0	bc48c9ab	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/19 11:58	upstream	2734d6c1b1a0	e6a17580	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/19 09:10	upstream	2734d6c1b1a0	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/18 20:10	upstream	f0eb870a8422	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/18 02:10	upstream	1d67c8d993ba	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/17 12:30	upstream	d980cc0620ae	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/16 23:46	upstream	0d18c12b288a	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/16 10:12	upstream	d936eb238744	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/15 21:49	upstream	dd9c7df94c1b	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/15 17:42	upstream	8096acd7442e	f115ae98	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/14 18:34	upstream	8096acd7442e	94e0b707	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/07/14 13:09	upstream	40226a3d96ef	94e0b707	.config	log	report	info	KCSAN: data-race in __find_get_block / has_bh_in_lru
ci2-upstream-kcsan-gce	2021/01/16 23:40	upstream	54c6247d06f1	65a7a854	.config	log	report	info
ci2-upstream-kcsan-gce	2020/02/02 11:07	https://github.com/google/ktsan.git kcsan	245a43005292	2274ad39	.config	log	report
ci2-upstream-kcsan-gce	2020/01/30 02:45	https://github.com/google/ktsan.git kcsan	245a43005292	5ed23f9a	.config	log	report
ci2-upstream-kcsan-gce	2019/10/24 14:58	https://github.com/google/ktsan.git kcsan	05f2236801fe	d01bb02a	.config	log	report