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BUG: KCSAN: data-race in dd_has_work / deadline_remove_request

write to 0xffff88810265a298 of 8 bytes by task 8549 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_add_rq_to_plug+0x13f/0x390 block/blk-mq.c:2700
 blk_mq_submit_bio+0x91c/0xe40 block/blk-mq.c:2849
 __submit_bio+0x130/0x330 block/blk-core.c:662
 __submit_bio_noacct_mq block/blk-core.c:739 [inline]
 submit_bio_noacct_nocheck+0x425/0x480 block/blk-core.c:756
 submit_bio_noacct+0x6c4/0x820 block/blk-core.c:863
 submit_bio+0x139/0x150
 ext4_io_submit fs/ext4/page-io.c:378 [inline]
 io_submit_add_bh fs/ext4/page-io.c:420 [inline]
 ext4_bio_write_page+0x43d/0x8a0 fs/ext4/page-io.c:546
 mpage_submit_page fs/ext4/inode.c:2090 [inline]
 mpage_map_and_submit_buffers fs/ext4/inode.c:2336 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2475 [inline]
 ext4_writepages+0xe76/0x1970 fs/ext4/inode.c:2804
 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
 filemap_write_and_wait include/linux/pagemap.h:60 [inline]
 ext4_ioctl_setflags fs/ext4/ioctl.c:638 [inline]
 ext4_fileattr_set+0x4b8/0xbc0 fs/ext4/ioctl.c:1002
 vfs_fileattr_set+0x56b/0x5d0 fs/ioctl.c:696
 do_vfs_ioctl+0x1010/0x1390
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x83/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 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 0xffff88810265a298 of 8 bytes by task 8556 on cpu 0:
 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+0x148/0x780 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_add_rq_to_plug+0x13f/0x390 block/blk-mq.c:2700
 blk_mq_submit_bio+0x91c/0xe40 block/blk-mq.c:2849
 __submit_bio+0x130/0x330 block/blk-core.c:662
 __submit_bio_noacct_mq block/blk-core.c:739 [inline]
 submit_bio_noacct_nocheck+0x425/0x480 block/blk-core.c:756
 submit_bio_noacct+0x6c4/0x820 block/blk-core.c:863
 submit_bio+0x139/0x150
 ext4_io_submit fs/ext4/page-io.c:378 [inline]
 io_submit_add_bh fs/ext4/page-io.c:420 [inline]
 ext4_bio_write_page+0x43d/0x8a0 fs/ext4/page-io.c:546
 mpage_submit_page fs/ext4/inode.c:2090 [inline]
 mpage_map_and_submit_buffers fs/ext4/inode.c:2336 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2475 [inline]
 ext4_writepages+0xe76/0x1970 fs/ext4/inode.c:2804
 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
 filemap_write_and_wait include/linux/pagemap.h:60 [inline]
 ext4_ioctl_setflags fs/ext4/ioctl.c:638 [inline]
 ext4_fileattr_set+0x4b8/0xbc0 fs/ext4/ioctl.c:1002
 vfs_fileattr_set+0x56b/0x5d0 fs/ioctl.c:696
 do_vfs_ioctl+0x1010/0x1390
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x83/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 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: 0xffff8881031913c8 -> 0xffff88810265a290

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 8556 Comm: syz-executor.4 Not tainted 5.18.0-rc5-syzkaller-00178-g30c8e80f7932-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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