==================================================================
BUG: KCSAN: data-race in blk_mq_free_request / blk_mq_free_request

write to 0xffffe8ffffc15748 of 8 bytes by interrupt on cpu 0:
 blk_mq_free_request+0x17d/0x340 block/blk-mq.c:530
 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:565
 blk_mq_end_request+0x37/0x50 block/blk-mq.c:574
 lo_complete_rq+0xca/0x170 drivers/block/loop.c:541
 blk_complete_reqs block/blk-mq.c:584 [inline]
 blk_done_softirq+0x69/0x90 block/blk-mq.c:589
 __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

read to 0xffffe8ffffc15748 of 8 bytes by interrupt on cpu 1:
 blk_mq_free_request+0x16a/0x340 block/blk-mq.c:530
 __blk_mq_end_request+0x214/0x230 block/blk-mq.c:565
 blk_mq_end_request+0x37/0x50 block/blk-mq.c:574
 lo_complete_rq+0xca/0x170 drivers/block/loop.c:541
 blk_complete_reqs block/blk-mq.c:584 [inline]
 blk_done_softirq+0x69/0x90 block/blk-mq.c:589
 __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

value changed: 0x00000000000a4519 -> 0x00000000000a451c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 5.15.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
sd 0:0:1:0: tag#2026 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s
sd 0:0:1:0: tag#2026 CDB: opcode=0xe5 (vendor)
sd 0:0:1:0: tag#2026 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c
sd 0:0:1:0: tag#2026 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d
sd 0:0:1:0: tag#2026 CDB[20]: ba
sd 0:0:1:0: tag#2027 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s
sd 0:0:1:0: tag#2027 CDB: opcode=0xe5 (vendor)
sd 0:0:1:0: tag#2027 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c
sd 0:0:1:0: tag#2027 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d
sd 0:0:1:0: tag#2027 CDB[20]: ba
sd 0:0:1:0: tag#2036 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s
sd 0:0:1:0: tag#2036 CDB: opcode=0xe5 (vendor)
sd 0:0:1:0: tag#2036 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c
sd 0:0:1:0: tag#2036 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d
sd 0:0:1:0: tag#2036 CDB[20]: ba
sd 0:0:1:0: tag#2037 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s
sd 0:0:1:0: tag#2037 CDB: opcode=0xe5 (vendor)
sd 0:0:1:0: tag#2037 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c
sd 0:0:1:0: tag#2037 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d
sd 0:0:1:0: tag#2037 CDB[20]: ba
sd 0:0:1:0: tag#1987 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s
sd 0:0:1:0: tag#1987 CDB: opcode=0xe5 (vendor)
sd 0:0:1:0: tag#1987 CDB[00]: e5 f4 32 73 2f 4e 09 6d 26 e2 c7 35 d1 35 12 1c
sd 0:0:1:0: tag#1987 CDB[10]: 92 1b da 40 b8 58 5b a8 d4 7d 34 f3 90 4c f1 2d
sd 0:0:1:0: tag#1987 CDB[20]: ba