================================================================== BUG: KCSAN: data-race in sbitmap_queue_clear / sbitmap_queue_clear write to 0xffffe8ffffd34b84 of 4 bytes by interrupt on cpu 0: sbitmap_queue_clear+0xca/0xf0 lib/sbitmap.c:588 blk_mq_put_tag+0x82/0x90 block/blk-mq-tag.c:188 __blk_mq_free_request+0x14e/0x1c0 block/blk-mq.c:497 blk_mq_free_request+0x2bd/0x330 block/blk-mq.c:531 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:555 blk_mq_end_request+0x37/0x50 block/blk-mq.c:564 end_cmd+0x80/0x140 drivers/block/null_blk_main.c:692 null_complete_rq+0x18/0x20 drivers/block/null_blk_main.c:719 blk_done_softirq+0x145/0x190 block/blk-mq.c:586 __do_softirq+0x12c/0x2b1 kernel/softirq.c:298 run_ksoftirqd+0x13/0x20 kernel/softirq.c:653 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165 kthread+0x1fa/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 write to 0xffffe8ffffd34b84 of 4 bytes by interrupt on cpu 1: sbitmap_queue_clear+0xca/0xf0 lib/sbitmap.c:588 blk_mq_put_tag+0x82/0x90 block/blk-mq-tag.c:188 __blk_mq_free_request+0x14e/0x1c0 block/blk-mq.c:497 blk_mq_free_request+0x2bd/0x330 block/blk-mq.c:531 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:555 blk_mq_end_request+0x37/0x50 block/blk-mq.c:564 end_cmd+0x80/0x140 drivers/block/null_blk_main.c:692 null_complete_rq+0x18/0x20 drivers/block/null_blk_main.c:719 blk_done_softirq+0x145/0x190 block/blk-mq.c:586 __do_softirq+0x12c/0x2b1 kernel/softirq.c:298 run_ksoftirqd+0x13/0x20 kernel/softirq.c:653 smpboot_thread_fn+0x34f/0x520 kernel/smpboot.c:165 kthread+0x1fa/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15 Comm: ksoftirqd/1 Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================