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BUG: KCSAN: data-race in dd_has_work / deadline_remove_request

write to 0xffff888102627698 of 8 bytes by task 8230 on cpu 0:
 __list_del include/linux/list.h:114 [inline]
 __list_del_entry include/linux/list.h:137 [inline]
 list_del_init include/linux/list.h:206 [inline]
 deadline_remove_request+0x58/0x190 block/mq-deadline.c:173
 deadline_move_request block/mq-deadline.c:249 [inline]
 __dd_dispatch_request+0x422/0x4d0 block/mq-deadline.c:465
 dd_dispatch_request+0x1d0/0x2b0 block/mq-deadline.c:531
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:121 [inline]
 blk_mq_do_dispatch_sched+0x219/0x7f0 block/blk-mq-sched.c:187
 __blk_mq_sched_dispatch_requests+0x1ca/0x270
 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:339
 __blk_mq_run_hw_queue+0x7e/0x100 block/blk-mq.c:1980
 __blk_mq_delay_run_hw_queue+0x19c/0x390 block/blk-mq.c:2057
 blk_mq_run_hw_queue+0x180/0x310 block/blk-mq.c:2108
 blk_mq_sched_insert_requests+0x1cc/0x2a0 block/blk-mq-sched.c:493
 blk_mq_dispatch_plug_list+0x1e9/0x2c0 block/blk-mq.c:2603
 blk_mq_flush_plug_list+0x2ea/0x340 block/blk-mq.c:2645
 __blk_flush_plug+0x25a/0x2b0 block/blk-core.c:1244
 blk_finish_plug+0x44/0x60 block/blk-core.c:1268
 __iomap_dio_rw+0xcb5/0x10a0 fs/iomap/direct-io.c:599
 iomap_dio_rw+0x38/0x80 fs/iomap/direct-io.c:681
 ext4_dio_write_iter fs/ext4/file.c:566 [inline]
 ext4_file_write_iter+0x7ab/0xd70 fs/ext4/file.c:677
 call_write_iter include/linux/fs.h:2079 [inline]
 do_iter_readv_writev+0x27d/0x320 fs/read_write.c:726
 do_iter_write+0x192/0x5c0 fs/read_write.c:852
 vfs_iter_write+0x4c/0x70 fs/read_write.c:893
 iter_file_splice_write+0x43a/0x790 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x675/0xc40 fs/read_write.c:1246
 __do_sys_sendfile64 fs/read_write.c:1311 [inline]
 __se_sys_sendfile64 fs/read_write.c:1297 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1297
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888102627698 of 8 bytes by task 8222 on cpu 1:
 list_empty_careful include/linux/list.h:329 [inline]
 dd_has_work_for_prio block/mq-deadline.c:837 [inline]
 dd_has_work+0x188/0x260 block/mq-deadline.c:846
 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:109 [inline]
 blk_mq_do_dispatch_sched+0x15c/0x7f0 block/blk-mq-sched.c:187
 __blk_mq_sched_dispatch_requests+0x1ca/0x270
 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:339
 __blk_mq_run_hw_queue+0x7e/0x100 block/blk-mq.c:1980
 __blk_mq_delay_run_hw_queue+0x19c/0x390 block/blk-mq.c:2057
 blk_mq_run_hw_queue+0x180/0x310 block/blk-mq.c:2108
 blk_mq_sched_insert_requests+0x1cc/0x2a0 block/blk-mq-sched.c:493
 blk_mq_dispatch_plug_list+0x1e9/0x2c0 block/blk-mq.c:2603
 blk_mq_flush_plug_list+0x2ea/0x340 block/blk-mq.c:2645
 __blk_flush_plug+0x25a/0x2b0 block/blk-core.c:1244
 blk_finish_plug+0x44/0x60 block/blk-core.c:1268
 __iomap_dio_rw+0xcb5/0x10a0 fs/iomap/direct-io.c:599
 iomap_dio_rw+0x38/0x80 fs/iomap/direct-io.c:681
 ext4_dio_write_iter fs/ext4/file.c:566 [inline]
 ext4_file_write_iter+0x7ab/0xd70 fs/ext4/file.c:677
 call_write_iter include/linux/fs.h:2079 [inline]
 do_iter_readv_writev+0x27d/0x320 fs/read_write.c:726
 do_iter_write+0x192/0x5c0 fs/read_write.c:852
 vfs_iter_write+0x4c/0x70 fs/read_write.c:893
 iter_file_splice_write+0x43a/0x790 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0x80/0xa0 fs/splice.c:936
 splice_direct_to_actor+0x345/0x650 fs/splice.c:891
 do_splice_direct+0x106/0x190 fs/splice.c:979
 do_sendfile+0x675/0xc40 fs/read_write.c:1246
 __do_sys_sendfile64 fs/read_write.c:1311 [inline]
 __se_sys_sendfile64 fs/read_write.c:1297 [inline]
 __x64_sys_sendfile64+0x102/0x140 fs/read_write.c:1297
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0xffff888103162408 -> 0xffff888102627690

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8222 Comm: syz-executor.2 Not tainted 5.17.0-syzkaller-11407-gae085d7f9365-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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