================================================================== BUG: KCSAN: data-race in dd_has_work / deadline_remove_request write to 0xffff888102a78c98 of 8 bytes by task 2631 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:147 [inline] blk_mq_do_dispatch_sched+0x1e7/0x6d0 block/blk-mq-sched.c:212 __blk_mq_sched_dispatch_requests+0x1ca/0x270 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:358 __blk_mq_run_hw_queue+0xc1/0x140 block/blk-mq.c:1785 __blk_mq_delay_run_hw_queue+0x199/0x360 block/blk-mq.c:1862 blk_mq_run_hw_queue+0x231/0x260 block/blk-mq.c:1915 blk_mq_sched_insert_requests+0x130/0x200 block/blk-mq-sched.c:511 blk_mq_flush_plug_list+0x372/0x460 block/blk-mq.c:2292 blk_flush_plug+0x25a/0x2b0 block/blk-core.c:1593 blk_finish_plug+0x44/0x60 block/blk-core.c:1617 ext4_writepages+0x1581/0x1a50 fs/ext4/inode.c:2828 do_writepages+0x1cb/0x330 mm/page-writeback.c:2364 filemap_fdatawrite_wbc mm/filemap.c:407 [inline] __filemap_fdatawrite_range mm/filemap.c:440 [inline] file_write_and_wait_range+0x132/0x1d0 mm/filemap.c:824 ext4_sync_file+0xad/0x570 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:182 generic_write_sync include/linux/fs.h:2894 [inline] ext4_buffered_write_iter+0x243/0x290 fs/ext4/file.c:275 ext4_file_write_iter+0x227/0xda0 call_write_iter include/linux/fs.h:2086 [inline] do_iter_readv_writev+0x2de/0x380 fs/read_write.c:725 do_iter_write+0x192/0x5c0 fs/read_write.c:851 vfs_iter_write+0x4c/0x70 fs/read_write.c:892 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:1245 __do_sys_sendfile64 fs/read_write.c:1304 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0xb9/0x140 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888102a78c98 of 8 bytes by task 2600 on cpu 1: list_empty_careful include/linux/list.h:321 [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:135 [inline] blk_mq_do_dispatch_sched+0x12a/0x6d0 block/blk-mq-sched.c:212 __blk_mq_sched_dispatch_requests+0x1ca/0x270 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:358 __blk_mq_run_hw_queue+0xc1/0x140 block/blk-mq.c:1785 __blk_mq_delay_run_hw_queue+0x199/0x360 block/blk-mq.c:1862 blk_mq_run_hw_queue+0x231/0x260 block/blk-mq.c:1915 blk_mq_sched_insert_requests+0x130/0x200 block/blk-mq-sched.c:511 blk_mq_flush_plug_list+0x372/0x460 block/blk-mq.c:2292 blk_flush_plug+0x25a/0x2b0 block/blk-core.c:1593 blk_finish_plug+0x44/0x60 block/blk-core.c:1617 ext4_writepages+0x1581/0x1a50 fs/ext4/inode.c:2828 do_writepages+0x1cb/0x330 mm/page-writeback.c:2364 filemap_fdatawrite_wbc mm/filemap.c:407 [inline] __filemap_fdatawrite_range mm/filemap.c:440 [inline] file_write_and_wait_range+0x132/0x1d0 mm/filemap.c:824 ext4_sync_file+0xad/0x570 fs/ext4/fsync.c:151 vfs_fsync_range+0x107/0x120 fs/sync.c:182 generic_write_sync include/linux/fs.h:2894 [inline] ext4_buffered_write_iter+0x243/0x290 fs/ext4/file.c:275 ext4_file_write_iter+0x227/0xda0 call_write_iter include/linux/fs.h:2086 [inline] do_iter_readv_writev+0x2de/0x380 fs/read_write.c:725 do_iter_write+0x192/0x5c0 fs/read_write.c:851 vfs_iter_write+0x4c/0x70 fs/read_write.c:892 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:1245 __do_sys_sendfile64 fs/read_write.c:1304 [inline] __se_sys_sendfile64 fs/read_write.c:1296 [inline] __x64_sys_sendfile64+0xb9/0x140 fs/read_write.c:1296 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0xffff888102a90ac8 -> 0xffff888102a78c90 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2600 Comm: syz-executor.0 Not tainted 5.16.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== syz-executor.0 (2600) used greatest stack depth: 9744 bytes left