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BUG: KCSAN: data-race in dd_has_work / deadline_remove_request

write to 0xffff88810315a888 of 8 bytes by task 5601 on cpu 1:
 __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+0x411/0x4a0 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+0x201/0x780 block/blk-mq-sched.c:187
 __blk_mq_sched_dispatch_requests+0x1ca/0x270
 blk_mq_sched_dispatch_requests+0x8f/0xf0 block/blk-mq-sched.c:339
 __blk_mq_run_hw_queue+0x7e/0x100 block/blk-mq.c:1974
 __blk_mq_delay_run_hw_queue+0x194/0x390 block/blk-mq.c:2051
 blk_mq_run_hw_queue+0x180/0x310 block/blk-mq.c:2102
 blk_mq_sched_insert_requests+0x1cb/0x2a0 block/blk-mq-sched.c:493
 blk_mq_dispatch_plug_list+0x1e9/0x2c0 block/blk-mq.c:2597
 blk_mq_flush_plug_list+0x2ea/0x340 block/blk-mq.c:2639
 __blk_flush_plug+0x25a/0x2b0 block/blk-core.c:1244
 blk_finish_plug+0x44/0x60 block/blk-core.c:1268
 __iomap_dio_rw+0xc50/0xf80 fs/iomap/direct-io.c:599
 iomap_dio_rw+0x38/0x80 fs/iomap/direct-io.c:681
 ext4_dio_read_iter fs/ext4/file.c:79 [inline]
 ext4_file_read_iter+0x19c/0x200 fs/ext4/file.c:130
 call_read_iter include/linux/fs.h:2044 [inline]
 generic_file_splice_read+0x1de/0x2c0 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870
 do_splice_direct+0xfb/0x180 fs/splice.c:979
 do_sendfile+0x3ad/0x900 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+0x10c/0x150 fs/read_write.c:1297
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88810315a888 of 8 bytes by task 5592 on cpu 0:
 list_empty_careful include/linux/list.h:329 [inline]
 dd_has_work_for_prio block/mq-deadline.c:836 [inline]
 dd_has_work+0x144/0x260 block/mq-deadline.c:846
 blk_mq_sched_has_work block/blk-mq-sched.h:82 [inline]
 blk_mq_hctx_has_pending block/blk-mq.c:103 [inline]
 blk_mq_run_hw_queue+0x255/0x310 block/blk-mq.c:2097
 blk_mq_sched_insert_requests+0x1cb/0x2a0 block/blk-mq-sched.c:493
 blk_mq_dispatch_plug_list+0x1e9/0x2c0 block/blk-mq.c:2597
 blk_mq_flush_plug_list+0x2ea/0x340 block/blk-mq.c:2639
 __blk_flush_plug+0x25a/0x2b0 block/blk-core.c:1244
 blk_finish_plug+0x44/0x60 block/blk-core.c:1268
 ext4_writepages+0x14a1/0x1970 fs/ext4/inode.c:2855
 do_writepages+0x1db/0x350 mm/page-writeback.c:2352
 filemap_fdatawrite_wbc+0xd6/0xf0 mm/filemap.c:388
 __filemap_fdatawrite_range mm/filemap.c:421 [inline]
 filemap_write_and_wait_range+0xbf/0x2e0 mm/filemap.c:673
 __iomap_dio_rw+0x514/0xf80 fs/iomap/direct-io.c:562
 iomap_dio_rw+0x38/0x80 fs/iomap/direct-io.c:681
 ext4_dio_read_iter fs/ext4/file.c:79 [inline]
 ext4_file_read_iter+0x19c/0x200 fs/ext4/file.c:130
 call_read_iter include/linux/fs.h:2044 [inline]
 generic_file_splice_read+0x1de/0x2c0 fs/splice.c:311
 do_splice_to fs/splice.c:796 [inline]
 splice_direct_to_actor+0x2ac/0x660 fs/splice.c:870
 do_splice_direct+0xfb/0x180 fs/splice.c:979
 do_sendfile+0x3ad/0x900 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+0x10c/0x150 fs/read_write.c:1297
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0xffff888103289f88 -> 0xffff88810315a880

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5592 Comm: syz-executor.5 Not tainted 5.18.0-rc5-syzkaller-00163-g4b97bac0756a-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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