KCSAN: data-race in bio_endio / blk_mq_submit

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in bio_endio / blk_mq_submit_bio block	6				1	1755d	1755d	0/29	auto-closed as invalid on 2021/01/23 11:49

================================================================== BUG: KCSAN: data-race in bio_endio / blk_mq_submit_bio write to 0xffff88813a5e6514 of 2 bytes by task 20989 on cpu 1: bio_set_flag include/linux/bio.h:264 [inline] rq_qos_throttle block/blk-rq-qos.h:180 [inline] blk_mq_submit_bio+0x228/0x1060 block/blk-mq.c:2185 __submit_bio_noacct_mq block/blk-core.c:1014 [inline] submit_bio_noacct+0x7c2/0x9a0 block/blk-core.c:1047 submit_bio+0x200/0x370 block/blk-core.c:1118 blk_next_bio block/blk-lib.c:19 [inline] __blkdev_issue_zero_pages+0x135/0x2f0 block/blk-lib.c:318 blkdev_issue_zeroout+0x173/0x2a0 block/blk-lib.c:412 blk_ioctl_zeroout block/ioctl.c:174 [inline] blkdev_common_ioctl+0x1081/0x10a0 block/ioctl.c:469 blkdev_ioctl+0x16e/0x3c0 block/ioctl.c:577 block_ioctl+0x6d/0x80 fs/block_dev.c:1667 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:739 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:739 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88813a5e6514 of 2 bytes by interrupt on cpu 0: bio_flagged include/linux/bio.h:259 [inline] bio_remaining_done block/bio.c:1391 [inline] bio_endio+0x3c/0x370 block/bio.c:1421 req_bio_endio block/blk-core.c:265 [inline] blk_update_request+0x4f5/0xb40 block/blk-core.c:1456 blk_mq_end_request+0x22/0x50 block/blk-mq.c:564 end_cmd+0x80/0x140 drivers/block/null_blk/main.c:699 null_complete_rq+0x18/0x20 drivers/block/null_blk/main.c:726 blk_complete_reqs block/blk-mq.c:576 [inline] blk_done_softirq+0x69/0x90 block/blk-mq.c:581 __do_softirq+0x13c/0x2c3 kernel/softirq.c:345 run_ksoftirqd+0x13/0x20 kernel/softirq.c:652 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165 kthread+0x20b/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12 Comm: ksoftirqd/0 Tainted: G W 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================