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INFO: task swapper/0:1 blocked for more than 143 seconds. Not tainted 5.19.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:swapper/0 state:D stack:23328 pid: 1 ppid: 0 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5116 [inline] __schedule+0xa00/0x4b30 kernel/sched/core.c:6428 schedule+0xd2/0x1f0 kernel/sched/core.c:6500 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6559 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 add_early_randomness+0x1a/0x170 drivers/char/hw_random/core.c:69 hwrng_register+0x399/0x510 drivers/char/hw_random/core.c:599 virtrng_scan+0x37/0x90 drivers/char/hw_random/virtio-rng.c:205 virtio_dev_probe+0x639/0x910 drivers/virtio/virtio.c:312 call_driver_probe drivers/base/dd.c:555 [inline] really_probe+0x23e/0xb90 drivers/base/dd.c:634 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:764 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:794 __driver_attach+0x22d/0x550 drivers/base/dd.c:1163 bus_for_each_dev+0x147/0x1d0 drivers/base/bus.c:301 bus_add_driver+0x422/0x640 drivers/base/bus.c:618 driver_register+0x220/0x3a0 drivers/base/driver.c:240 do_one_initcall+0x103/0x650 init/main.c:1295 do_initcall_level init/main.c:1368 [inline] do_initcalls init/main.c:1384 [inline] do_basic_setup init/main.c:1403 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1610 kernel_init+0x1a/0x1d0 init/main.c:1499 kernel_init+0x1a/0x1d0 init/main.c:1499 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 </TASK> Showing all locks held in the system: 2 locks held by swapper/0/1: #0: ffff88801b895170 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #0: ffff88801b895170 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1054 [inline] #0: ffff88801b895170 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x222/0x550 drivers/base/dd.c:1162 #1: ffffffff8c832be8 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness+0x1a/0x170 drivers/char/hw_random/core.c:69 2 locks held by pr/ttyS0/16: 1 lock held by khungtaskd/29: #0: ffffffff8bd867e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491 2 locks held by kworker/u4:4/93: #0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc900015e7da8 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 1 lock held by hwrng/755: #0: ffffffff8c832be8 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0x141/0x370 drivers/char/hw_random/core.c:503 =============================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2022/06/16 19:01 | net-old | 2e7bf4a6af48 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/16 15:32 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/16 15:32 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/16 15:32 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/15 17:58 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/15 17:58 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/15 17:58 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/15 13:56 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/15 13:56 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/15 13:56 | net-old | 219b51a6f040 | 1719ee24 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/15 02:53 | net-old | d7dd6eccfbc9 | 127d1faf | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/14 02:20 | net-old | 619c010a6539 | 0f087040 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/13 23:41 | net-old | 619c010a6539 | 0f087040 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/13 23:41 | net-old | 619c010a6539 | 0f087040 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/13 11:17 | net-old | a5b00f5b78b7 | 0d5abf15 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/11 05:41 | net-old | 6f0e1efc880a | 0d5abf15 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/11 00:46 | net-old | aa3398fb4b3f | 0d5abf15 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness | ||||
2022/06/10 07:43 | net-old | 825464e79db4 | 0d5abf15 | .config | console log | report | ci-upstream-net-this-kasan-gce | net boot error: INFO: task hung in add_early_randomness |