KCSAN: data-race in __blk_mq_get_driver_tag / bt_tags_for

KCSAN: data-race in __blk_mq_get_driver_tag / bt_tags_for_each

Status: auto-obsoleted due to no activity on 2023/05/27 13:09
Subsystems: block
[Documentation on labels]
First crash: 1000d, last: 1000d

▶ ▼ Similar bugs (1)

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __blk_mq_get_driver_tag / bt_tags_for_each (2) block	6				6	839d	908d	0/29	auto-obsoleted due to no activity on 2023/11/04 04:04

Sample crash report:

==================================================================
BUG: KCSAN: data-race in __blk_mq_get_driver_tag / bt_tags_for_each

write to 0xffff888102916428 of 8 bytes by task 41 on cpu 1:
 __blk_mq_get_driver_tag+0x2d8/0x460 block/blk-mq.c:1793
 blk_mq_get_driver_tag block/blk-mq.h:284 [inline]
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:152 [inline]
 blk_mq_do_dispatch_sched+0x399/0x820 block/blk-mq-sched.c:186
 __blk_mq_sched_dispatch_requests+0x1c1/0x260
 blk_mq_sched_dispatch_requests+0x93/0x100 block/blk-mq-sched.c:338

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/04/22 13:02	upstream	8e41e0a57566	2b32bd34	.config	console log	report			info		ci2-upstream-kcsan-gce	KCSAN: data-race in __blk_mq_get_driver_tag / bt_tags_for_each

* ~~Struck through~~ repros no longer work on HEAD.