INFO: task kworker/0:17:15369 blocked for more than 143 seconds. Not tainted 5.19.0-rc1-syzkaller-00262-g0885eacdc81f #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:17 state:D stack:21400 pid:15369 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5116 [inline] __schedule+0x957/0xec0 kernel/sched/core.c:6428 schedule+0xeb/0x1b0 kernel/sched/core.c:6500 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6559 __mutex_lock_common+0xecf/0x26c0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 add_early_randomness drivers/char/hw_random/core.c:69 [inline] hwrng_register+0x3bf/0x680 drivers/char/hw_random/core.c:599 chaoskey_probe+0x7f0/0xb10 drivers/usb/misc/chaoskey.c:205 usb_probe_interface+0x66e/0xb60 drivers/usb/core/driver.c:396 call_driver_probe+0x96/0x250 really_probe+0x220/0x940 drivers/base/dd.c:634 __driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:764 driver_probe_device+0x50/0x240 drivers/base/dd.c:794 __device_attach_driver+0x273/0x3d0 drivers/base/dd.c:917 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x372/0x5a0 drivers/base/dd.c:989 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0xb20/0xf90 drivers/base/core.c:3417 usb_set_configuration+0x1a5f/0x20e0 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0x83/0x140 drivers/usb/core/generic.c:238 usb_probe_device+0x131/0x260 drivers/usb/core/driver.c:293 call_driver_probe+0x96/0x250 really_probe+0x220/0x940 drivers/base/dd.c:634 __driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:764 driver_probe_device+0x50/0x240 drivers/base/dd.c:794 __device_attach_driver+0x273/0x3d0 drivers/base/dd.c:917 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x372/0x5a0 drivers/base/dd.c:989 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 device_add+0xb20/0xf90 drivers/base/core.c:3417 usb_new_device+0xbfc/0x18a0 drivers/usb/core/hub.c:2566 hub_port_connect+0x106b/0x2930 drivers/usb/core/hub.c:5363 hub_port_connect_change+0x619/0xbe0 drivers/usb/core/hub.c:5507 port_event+0xeb7/0x1390 drivers/usb/core/hub.c:5663 hub_event+0x5be/0xd70 drivers/usb/core/hub.c:5745 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8cb1ebe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by hwrng/756: #0: ffffffff8d24cae8 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xec/0x470 drivers/char/hw_random/core.c:503 2 locks held by getty/3294: #0: ffff888027347098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2124 3 locks held by kworker/u4:8/9417: 3 locks held by udevd/7366: #0: ffff88806a95a488 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:197 [inline] #0: ffff88806a95a488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x19b/0x570 fs/kernfs/file.c:236 #1: ffff888026075748 (kn->active#86){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:198 [inline] #1: ffff888026075748 (kn->active#86){++++}-{0:0}, at: kernfs_fop_read_iter+0x1b3/0x570 fs/kernfs/file.c:236 #2: ffff88807e856190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline] #2: ffff88807e856190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x30/0x390 drivers/usb/core/sysfs.c:873 6 locks held by kworker/0:17/15369: #0: ffff88814586f138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90009edfd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 #2: ffff8881476d9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff8881476d9190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bf/0xd70 drivers/usb/core/hub.c:5691 #3: ffff88807e856190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff88807e856190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x5a0 drivers/base/dd.c:964 #4: ffff88807e851118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff88807e851118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x5a0 drivers/base/dd.c:964 #5: ffffffff8d24cae8 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness drivers/char/hw_random/core.c:69 [inline] #5: ffffffff8d24cae8 (reading_mutex){+.+.}-{3:3}, at: hwrng_register+0x3bf/0x680 drivers/char/hw_random/core.c:599 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc1-syzkaller-00262-g0885eacdc81f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x473/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x168/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xd18/0xd60 kernel/hung_task.c:378 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4852 Comm: kworker/u4:5 Not tainted 5.19.0-rc1-syzkaller-00262-g0885eacdc81f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy13 ieee80211_iface_work RIP: 0010:__kernel_text_address+0x30/0x40 kernel/extable.c:92 Code: 00 00 00 85 c0 0f 95 c0 48 c7 c1 00 30 4c 8f 48 39 cb 0f 93 c1 48 c7 c2 af f9 60 8f 48 39 d3 0f 92 c2 20 ca 08 c2 0f b6 c2 5b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 41 56 53 48 89 RSP: 0018:ffffc90002e2f298 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffffc90002e2f308 RCX: ffffffff8f4c3000 RDX: ffffffff8f60f901 RSI: ffffc90002e28000 RDI: ffffffff89b42819 RBP: ffffc90002e2f350 R08: ffffc90002e2f9b0 R09: dffffc0000000000 R10: fffff520005c5e64 R11: 1ffff920005c5e62 R12: ffff88807bbe3b00 R13: ffffffff81759e50 R14: dffffc0000000000 R15: 1ffff920005c5e61 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3369ab1000 CR3: 000000000c88e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_get_return_address+0x48/0x80 arch/x86/kernel/unwind_orc.c:318 arch_stack_walk+0xf8/0x140 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x12d/0x1f0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:515 kasan_kmalloc include/linux/kasan.h:234 [inline] kmem_cache_alloc_trace+0x94/0x310 mm/slub.c:3255 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] ieee802_11_parse_elems_crc+0xce/0x1130 net/mac80211/util.c:1502 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2257 [inline] ieee80211_bss_info_update+0x845/0xc30 net/mac80211/scan.c:212 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x1659/0x28c0 net/mac80211/ibss.c:1639 ieee80211_iface_process_skb net/mac80211/iface.c:1527 [inline] ieee80211_iface_work+0x757/0xcd0 net/mac80211/iface.c:1581 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 85 c0 0f 95 c0 add %al,-0x3f6af040(%rbp) 8: 48 c7 c1 00 30 4c 8f mov $0xffffffff8f4c3000,%rcx f: 48 39 cb cmp %rcx,%rbx 12: 0f 93 c1 setae %cl 15: 48 c7 c2 af f9 60 8f mov $0xffffffff8f60f9af,%rdx 1c: 48 39 d3 cmp %rdx,%rbx 1f: 0f 92 c2 setb %dl 22: 20 ca and %cl,%dl 24: 08 c2 or %al,%dl 26: 0f b6 c2 movzbl %dl,%eax 29: 5b pop %rbx * 2a: c3 retq <-- trapping instruction 2b: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 32: 00 00 00 35: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 3a: 55 push %rbp 3b: 41 56 push %r14 3d: 53 push %rbx 3e: 48 rex.W 3f: 89 .byte 0x89