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================================================================== BUG: KCSAN: data-race in __blk_mq_sched_dispatch_requests / __blk_mq_sched_dispatch_requests write to 0xffff8881019e4410 of 8 bytes by task 703 on cpu 0: INIT_LIST_HEAD include/linux/list.h:36 [inline] list_splice_init include/linux/list.h:483 [inline] __blk_mq_sched_dispatch_requests+0x16a/0x2c0 block/blk-mq-sched.c:299 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:351 __blk_mq_run_hw_queue+0xbc/0x140 block/blk-mq.c:1499 __blk_mq_delay_run_hw_queue+0x163/0x2f0 block/blk-mq.c:1576 blk_mq_run_hw_queue+0x22c/0x250 block/blk-mq.c:1629 blk_mq_run_hw_queues+0x1d1/0x230 block/blk-mq.c:1692 blk_mq_requeue_work+0x3e6/0x420 block/blk-mq.c:798 process_one_work+0x3e9/0x8f0 kernel/workqueue.c:2276 worker_thread+0x636/0xae0 kernel/workqueue.c:2422 kthread+0x1d0/0x1f0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 read to 0xffff8881019e4410 of 8 bytes by task 10270 on cpu 1: list_empty_careful include/linux/list.h:319 [inline] __blk_mq_sched_dispatch_requests+0xb1/0x2c0 block/blk-mq-sched.c:296 blk_mq_sched_dispatch_requests+0x9f/0x110 block/blk-mq-sched.c:351 __blk_mq_run_hw_queue+0xbc/0x140 block/blk-mq.c:1499 __blk_mq_delay_run_hw_queue+0x163/0x2f0 block/blk-mq.c:1576 blk_mq_run_hw_queue+0x22c/0x250 block/blk-mq.c:1629 blk_mq_sched_insert_requests+0x13f/0x200 block/blk-mq-sched.c:503 blk_mq_flush_plug_list+0x2f5/0x3c0 block/blk-mq.c:1954 blk_flush_plug_list+0x235/0x260 block/blk-core.c:1747 blk_finish_plug+0x44/0x60 block/blk-core.c:1764 read_pages+0x2d9/0x530 mm/readahead.c:150 page_cache_ra_unbounded+0x3c8/0x410 mm/readahead.c:238 do_page_cache_ra mm/readahead.c:267 [inline] force_page_cache_ra+0x246/0x280 mm/readahead.c:299 page_cache_sync_ra+0xcc/0xe0 mm/readahead.c:573 page_cache_sync_readahead include/linux/pagemap.h:879 [inline] filemap_get_pages mm/filemap.c:2467 [inline] filemap_read+0x388/0x1230 mm/filemap.c:2550 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2701 blkdev_read_iter+0xb9/0xf0 fs/block_dev.c:1730 call_read_iter include/linux/fs.h:2108 [inline] new_sync_read fs/read_write.c:415 [inline] vfs_read+0x565/0x5d0 fs/read_write.c:496 ksys_read+0xce/0x180 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:642 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0xffff888101aa7c88 -> 0xffff8881019e4408 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 10270 Comm: systemd-udevd Not tainted 5.13.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/06/24 00:09 | upstream | 7266f2030eb0 | fe4ab389 | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in __blk_mq_sched_dispatch_requests / __blk_mq_sched_dispatch_requests |