================================================================== BUG: KCSAN: data-race in blk_mq_free_request / blk_mq_free_request write to 0xffffe8ffffc15948 of 8 bytes by interrupt on cpu 0: blk_mq_free_request+0x17d/0x330 block/blk-mq.c:523 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:558 blk_mq_end_request+0x37/0x50 block/blk-mq.c:567 lo_complete_rq+0xca/0x170 drivers/block/loop.c:541 blk_complete_reqs block/blk-mq.c:577 [inline] blk_done_softirq+0x69/0x90 block/blk-mq.c:582 __do_softirq+0x12c/0x26e kernel/softirq.c:558 run_ksoftirqd+0x13/0x20 kernel/softirq.c:920 smpboot_thread_fn+0x22f/0x330 kernel/smpboot.c:164 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 read to 0xffffe8ffffc15948 of 8 bytes by interrupt on cpu 1: blk_mq_free_request+0x16a/0x330 block/blk-mq.c:523 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:558 blk_mq_end_request+0x37/0x50 block/blk-mq.c:567 lo_complete_rq+0xca/0x170 drivers/block/loop.c:541 blk_complete_reqs block/blk-mq.c:577 [inline] blk_done_softirq+0x69/0x90 block/blk-mq.c:582 __do_softirq+0x12c/0x26e kernel/softirq.c:558 run_ksoftirqd+0x13/0x20 kernel/softirq.c:920 smpboot_thread_fn+0x22f/0x330 kernel/smpboot.c:164 kthread+0x262/0x280 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 value changed: 0x0000000000001741 -> 0x0000000000001742 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.14.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================