KCSAN: data-race in bio_endio / blk_update

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in bio_endio / blk_update_request (3) block				1	1201d	1201d	0/26	auto-closed as invalid on 2021/02/14 11:47
upstream	KCSAN: data-race in bio_endio / blk_update_request (2) block				2	1476d	1544d	0/26	auto-closed as invalid on 2020/06/18 14:14

================================================================== BUG: KCSAN: data-race in bio_endio / blk_update_request write to 0xffff8880b9a68314 of 2 bytes by interrupt on cpu 1: bio_clear_flag include/linux/bio.h:244 [inline] blk_update_request+0x36a/0x7b0 block/blk-core.c:1461 blk_mq_end_request+0x3f/0x2b0 block/blk-mq.c:568 end_cmd drivers/block/null_blk_main.c:622 [inline] end_cmd+0xa9/0x1a0 drivers/block/null_blk_main.c:616 null_complete_rq+0x22/0x30 drivers/block/null_blk_main.c:649 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37 __do_softirq+0x115/0x33f kernel/softirq.c:292 run_ksoftirqd+0x46/0x60 kernel/softirq.c:603 smpboot_thread_fn+0x37d/0x4a0 kernel/smpboot.c:165 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 read to 0xffff8880b9a68314 of 2 bytes by interrupt on cpu 0: bio_remaining_done block/bio.c:1757 [inline] bio_endio+0x3e/0x4f0 block/bio.c:1787 req_bio_endio block/blk-core.c:242 [inline] blk_update_request+0x427/0x7b0 block/blk-core.c:1462 blk_mq_end_request+0x3f/0x2b0 block/blk-mq.c:568 end_cmd drivers/block/null_blk_main.c:622 [inline] end_cmd+0xa9/0x1a0 drivers/block/null_blk_main.c:616 null_complete_rq+0x22/0x30 drivers/block/null_blk_main.c:649 blk_done_softirq+0x1eb/0x250 block/blk-softirq.c:37 __do_softirq+0x115/0x33f kernel/softirq.c:292 run_ksoftirqd+0x46/0x60 kernel/softirq.c:603 smpboot_thread_fn+0x37d/0x4a0 kernel/smpboot.c:165 kthread+0x1d4/0x200 drivers/block/aoe/aoecmd.c:1253 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.4.0-rc6+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================