INFO: task syz-executor.3:31063 blocked for more than 143 seconds. Not tainted 6.2.0-rc3-syzkaller-00045-g82b0417e4bfc #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28600 pid:31063 ppid:2477 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0xa20/0x27c0 kernel/sched/core.c:6555 schedule+0xda/0x1b0 kernel/sched/core.c:6631 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747 sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213 usb_open+0x204/0x2e0 drivers/usb/core/file.c:48 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x6c7/0x12a0 fs/open.c:882 do_open fs/namei.c:3557 [inline] path_openat+0x1bbc/0x2a50 fs/namei.c:3714 do_filp_open+0x1b6/0x400 fs/namei.c:3741 do_sys_openat2+0x16d/0x4c0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1337 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fca40d69254 RSP: 002b:00007fca40129ca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fca40ed6f80 RCX: 00007fca40d69254 RDX: 0000000000000002 RSI: 00007fca40129d40 RDI: 00000000ffffff9c RBP: 00007fca40129d40 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffd19b5fa5f R14: 00007fca4012a300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:0/9: #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc9000009fda8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 1 lock held by rcu_tasks_kthre/11: #0: ffffffff87a97090 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/25: #0: ffffffff87a97be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6494 2 locks held by getty/2407: #0: ffff88811010c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900000452f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177 6 locks held by kworker/0:3/5259: #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90001707da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffff88810e96c190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #2: ffff88810e96c190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4810 drivers/usb/core/hub.c:5737 #3: ffff88813ac31190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #3: ffff88813ac31190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #4: ffff88810c19b118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #4: ffff88810c19b118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #5: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline] #5: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156 6 locks held by kworker/0:4/5263: #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc900019c7da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffff88810e9ac190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #2: ffff88810e9ac190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4810 drivers/usb/core/hub.c:5737 #3: ffff88810c705190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #3: ffff88810c705190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #4: ffff88810c707118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #4: ffff88810c707118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #5: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline] #5: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156 6 locks held by kworker/0:8/6140: #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109001d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc9000d4e7da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffff88810ea34190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #2: ffff88810ea34190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4810 drivers/usb/core/hub.c:5737 #3: ffff888118df5190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #3: ffff888118df5190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ed drivers/usb/core/hub.c:2226 #4: ffff888118df6118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #4: ffff888118df6118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline] #4: ffff888118df6118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1276 #5: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239 2 locks held by kworker/u4:3/30845: #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888100079138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc9000704fda8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 2 locks held by syz-executor.4/31056: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff88811572a8d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213 2 locks held by syz-executor.3/31063: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff88811572a8d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusbvga.c:2213 1 lock held by syz-executor.1/31567: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 3 locks held by udevd/31570: #0: ffff8881113d7088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:240 [inline] #0: ffff8881113d7088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x18a/0x790 fs/kernfs/file.c:280 #1: ffff8881375f11d8 (kn->active#24){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:241 [inline] #1: ffff8881375f11d8 (kn->active#24){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ad/0x790 fs/kernfs/file.c:280 #2: ffff88810c705190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:836 [inline] #2: ffff88810c705190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874 1 lock held by syz-executor.3/32505: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 1 lock held by syz-executor.4/32515: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 1 lock held by syz-executor.4/32516: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 1 lock held by syz-executor.4/32517: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 1 lock held by syz-executor.1/520: #0: ffffffff884277b0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 1 lock held by modprobe/1303: 1 lock held by modprobe/1304: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 25 Comm: khungtaskd Not tainted 6.2.0-rc3-syzkaller-00045-g82b0417e4bfc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xc71/0xfc0 kernel/hung_task.c:377 kthread+0x2ea/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1307 Comm: modprobe Not tainted 6.2.0-rc3-syzkaller-00045-g82b0417e4bfc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:ma_slots lib/maple_tree.c:797 [inline] RIP: 0010:mas_next_nentry+0x66d/0xab0 lib/maple_tree.c:4662 Code: 00 24 0c 87 e8 a4 22 7d fb 41 8d 44 24 ff 83 f8 01 0f 87 70 fa ff ff e8 81 25 7d fb 48 8b 44 24 08 48 83 e8 80 48 89 44 24 28 6b fa ff ff 48 c7 44 24 18 00 00 00 00 eb b9 e8 5e 25 7d fb 48 RSP: 0018:ffffc900023df5f0 EFLAGS: 00000283 RAX: ffff88811a162c80 RBX: 0000558e8ef0ffff RCX: 0000000000000000 RDX: ffff888100380000 RSI: ffffffff85ca367f RDI: 0000000000000005 RBP: ffffc900023df768 R08: 0000000000000005 R09: 0000000000000002 R10: 0000000000000001 R11: 0000000000054001 R12: 0000000000000001 R13: ffffffffffffffff R14: ffffc900023df768 R15: ffffc900023df780 FS: 0000000000000000(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558e8ef12008 CR3: 0000000143e69000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mas_next_entry lib/maple_tree.c:4758 [inline] mas_find+0x1d6/0xd10 lib/maple_tree.c:6021 validate_mm_mt+0x138/0x1b0 mm/mmap.c:296 validate_mm+0xa0/0x270 mm/mmap.c:332 mmap_region+0x1264/0x1bd0 mm/mmap.c:2742 do_mmap+0x82d/0xf60 mm/mmap.c:1411 vm_mmap_pgoff+0x1ab/0x270 mm/util.c:520 vm_mmap+0x92/0xc0 mm/util.c:539 elf_map+0x229/0x2a0 fs/binfmt_elf.c:394 load_elf_interp fs/binfmt_elf.c:632 [inline] load_elf_binary+0x3376/0x4f00 fs/binfmt_elf.c:1244 search_binary_handler fs/exec.c:1735 [inline] exec_binprm fs/exec.c:1777 [inline] bprm_execve fs/exec.c:1851 [inline] bprm_execve+0x7ef/0x19e0 fs/exec.c:1808 kernel_execve+0x3ea/0x500 fs/exec.c:2016 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:113 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308