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================================================================== BUG: KCSAN: data-race in __blk_mq_sched_dispatch_requests / __blk_mq_sched_dispatch_requests write to 0xffff888102548810 of 8 bytes by task 3248 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/0x2a0 block/blk-mq-sched.c:289 blk_mq_sched_dispatch_requests+0x8f/0xf0 block/blk-mq-sched.c:341 __blk_mq_run_hw_queue+0xee/0x1c0 block/blk-mq.c:1532 __blk_mq_delay_run_hw_queue+0x18e/0x340 block/blk-mq.c:1609 blk_mq_run_hw_queue+0x231/0x260 block/blk-mq.c:1662 blk_mq_run_hw_queues block/blk-mq.c:1680 [inline] blk_mq_requeue_work+0x423/0x490 block/blk-mq.c:816 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1ff/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 read to 0xffff888102548810 of 8 bytes by task 3249 on cpu 1: list_empty_careful include/linux/list.h:319 [inline] __blk_mq_sched_dispatch_requests+0xb1/0x2a0 block/blk-mq-sched.c:286 blk_mq_sched_dispatch_requests+0x8f/0xf0 block/blk-mq-sched.c:341 __blk_mq_run_hw_queue+0xee/0x1c0 block/blk-mq.c:1532 blk_mq_run_work_fn+0x3d/0x50 block/blk-mq.c:1810 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272 worker_thread+0x635/0xb90 kernel/workqueue.c:2418 kthread+0x1ff/0x220 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 3249 Comm: kworker/1:1H Not tainted 5.9.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: kblockd blk_mq_run_work_fn ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/10/18 21:52 | upstream | 9453b2d4694c | fea47c01 | .config | console log | report | info | ci2-upstream-kcsan-gce | ||||
2020/10/16 18:36 | upstream | 9ff9b0d392ea | 6e262c73 | .config | console log | report | info | ci2-upstream-kcsan-gce | ||||
2020/10/11 05:39 | upstream | da690031a5d6 | 4a77ae0b | .config | console log | report | info | ci2-upstream-kcsan-gce |