================================================================== BUG: KCSAN: data-race in __blk_mq_requeue_request / bt_tags_for_each write to 0xffff8881032fa5e0 of 4 bytes by task 8338 on cpu 0: __blk_mq_put_driver_tag block/blk-mq.h:256 [inline] blk_mq_put_driver_tag block/blk-mq.h:269 [inline] __blk_mq_requeue_request+0x9f/0x2b0 block/blk-mq.c:1426 blk_mq_handle_dev_resource block/blk-mq.c:1927 [inline] blk_mq_dispatch_rq_list+0x9a2/0x11f0 block/blk-mq.c:2068 __blk_mq_sched_dispatch_requests+0x1ab/0x260 block/blk-mq-sched.c:305 blk_mq_sched_dispatch_requests+0x93/0x100 block/blk-mq-sched.c:338 __blk_mq_run_hw_queue+0x8e/0x110 block/blk-mq.c:2177 __blk_mq_delay_run_hw_queue+0xb3/0x3a0 block/blk-mq.c:2253 blk_mq_run_hw_queue+0x19f/0x330 block/blk-mq.c:2301 blk_mq_sched_insert_requests+0x1da/0x2c0 block/blk-mq-sched.c:492 blk_mq_dispatch_plug_list block/blk-mq.c:2748 [inline] blk_mq_flush_plug_list+0x519/0x660 block/blk-mq.c:2790 blk_add_rq_to_plug+0x102/0x3d0 block/blk-mq.c:1297 blk_mq_submit_bio+0xa22/0xe00 block/blk-mq.c:2985 __submit_bio+0x130/0x360 block/blk-core.c:602 __submit_bio_noacct_mq block/blk-core.c:679 [inline] submit_bio_noacct_nocheck+0x4cd/0x600 block/blk-core.c:708 submit_bio_noacct+0x76f/0x900 block/blk-core.c:807 submit_bio+0x101/0x110 block/blk-core.c:843 ext4_io_submit fs/ext4/page-io.c:378 [inline] io_submit_add_bh fs/ext4/page-io.c:421 [inline] ext4_bio_write_page+0x7a1/0xcf0 fs/ext4/page-io.c:566 mpage_submit_page fs/ext4/inode.c:2129 [inline] mpage_map_and_submit_buffers fs/ext4/inode.c:2374 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2513 [inline] ext4_do_writepages+0x138c/0x2140 fs/ext4/inode.c:2876 ext4_writepages+0x127/0x250 fs/ext4/inode.c:2964 do_writepages+0x1c5/0x340 mm/page-writeback.c:2551 filemap_fdatawrite_wbc+0xdb/0xf0 mm/filemap.c:390 __filemap_fdatawrite_range mm/filemap.c:423 [inline] __filemap_fdatawrite mm/filemap.c:429 [inline] filemap_flush+0x95/0xc0 mm/filemap.c:456 ext4_alloc_da_blocks+0x50/0x130 fs/ext4/inode.c:3218 ext4_release_file+0x5f/0x1c0 fs/ext4/file.c:158 __fput+0x245/0x570 fs/file_table.c:321 ____fput+0x15/0x20 fs/file_table.c:349 task_work_run+0x123/0x160 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x600/0x1710 kernel/exit.c:869 do_group_exit+0x101/0x150 kernel/exit.c:1019 get_signal+0xea9/0xfe0 kernel/signal.c:2859 arch_do_signal_or_restart+0x89/0x2b0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6d/0xe0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x6a/0xa0 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x20 kernel/entry/common.c:310 irqentry_exit+0x12/0x40 kernel/entry/common.c:413 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 read to 0xffff8881032fa5e0 of 4 bytes by task 8638 on cpu 1: blk_mq_find_and_get_req block/blk-mq-tag.c:253 [inline] bt_tags_iter block/blk-mq-tag.c:349 [inline] __sbitmap_for_each_set include/linux/sbitmap.h:281 [inline] sbitmap_for_each_set include/linux/sbitmap.h:302 [inline] bt_tags_for_each+0x2e2/0x500 block/blk-mq-tag.c:384 __blk_mq_all_tag_iter block/blk-mq-tag.c:395 [inline] blk_mq_tagset_busy_iter+0x114/0x150 block/blk-mq-tag.c:439 scsi_host_busy+0x4f/0x80 drivers/scsi/hosts.c:603 scsi_host_queue_ready drivers/scsi/scsi_lib.c:1344 [inline] scsi_queue_rq+0x30a/0x1990 drivers/scsi/scsi_lib.c:1734 blk_mq_dispatch_rq_list+0x7b1/0x11f0 block/blk-mq.c:2059 __blk_mq_do_dispatch_sched block/blk-mq-sched.c:172 [inline] blk_mq_do_dispatch_sched+0x4de/0x820 block/blk-mq-sched.c:186 __blk_mq_sched_dispatch_requests+0x1c1/0x260 blk_mq_sched_dispatch_requests+0x93/0x100 block/blk-mq-sched.c:338 __blk_mq_run_hw_queue+0x8e/0x110 block/blk-mq.c:2177 __blk_mq_delay_run_hw_queue+0xb3/0x3a0 block/blk-mq.c:2253 blk_mq_run_hw_queue+0x19f/0x330 block/blk-mq.c:2301 blk_mq_sched_insert_requests+0x1da/0x2c0 block/blk-mq-sched.c:492 blk_mq_dispatch_plug_list block/blk-mq.c:2748 [inline] blk_mq_flush_plug_list+0x519/0x660 block/blk-mq.c:2790 blk_add_rq_to_plug+0x102/0x3d0 block/blk-mq.c:1297 blk_mq_submit_bio+0xa22/0xe00 block/blk-mq.c:2985 __submit_bio+0x130/0x360 block/blk-core.c:602 __submit_bio_noacct_mq block/blk-core.c:679 [inline] submit_bio_noacct_nocheck+0x4cd/0x600 block/blk-core.c:708 submit_bio_noacct+0x76f/0x900 block/blk-core.c:807 submit_bio+0x101/0x110 block/blk-core.c:843 ext4_io_submit fs/ext4/page-io.c:378 [inline] io_submit_add_bh fs/ext4/page-io.c:421 [inline] ext4_bio_write_page+0x7a1/0xcf0 fs/ext4/page-io.c:566 mpage_submit_page fs/ext4/inode.c:2129 [inline] mpage_map_and_submit_buffers fs/ext4/inode.c:2374 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2513 [inline] ext4_do_writepages+0x138c/0x2140 fs/ext4/inode.c:2876 ext4_writepages+0x127/0x250 fs/ext4/inode.c:2964 do_writepages+0x1c5/0x340 mm/page-writeback.c:2551 filemap_fdatawrite_wbc+0xdb/0xf0 mm/filemap.c:390 __filemap_fdatawrite_range mm/filemap.c:423 [inline] __filemap_fdatawrite mm/filemap.c:429 [inline] filemap_flush+0x95/0xc0 mm/filemap.c:456 ext4_alloc_da_blocks+0x50/0x130 fs/ext4/inode.c:3218 ext4_release_file+0x5f/0x1c0 fs/ext4/file.c:158 __fput+0x245/0x570 fs/file_table.c:321 ____fput+0x15/0x20 fs/file_table.c:349 task_work_run+0x123/0x160 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x600/0x1710 kernel/exit.c:869 do_group_exit+0x101/0x150 kernel/exit.c:1019 get_signal+0xea9/0xfe0 kernel/signal.c:2859 arch_do_signal_or_restart+0x89/0x2b0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6d/0xe0 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x6a/0xa0 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x9/0x20 kernel/entry/common.c:310 irqentry_exit+0x12/0x40 kernel/entry/common.c:413 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 value changed: 0x00000fed -> 0xffffffff Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8638 Comm: syz-executor.1 Not tainted 6.3.0-rc4-syzkaller-00195-g5a57b48fdfcb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 ==================================================================