INFO: task syz.3.2700:14179 blocked for more than 143 seconds. Not tainted 6.12.0-rc3-syzkaller-00051-g07b887f8236e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.2700 state:D stack:25840 pid:14179 tgid:14177 ppid:2653 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6774 rpm_resume+0x5a8/0x1330 drivers/base/power/runtime.c:834 rpm_resume+0x750/0x1330 drivers/base/power/runtime.c:892 __pm_runtime_resume+0xb6/0x170 drivers/base/power/runtime.c:1172 pm_runtime_resume_and_get include/linux/pm_runtime.h:430 [inline] usb_autopm_get_interface+0x20/0xe0 drivers/usb/core/driver.c:1833 wdm_manage_power+0x1d/0xa0 drivers/usb/class/cdc-wdm.c:1134 wdm_release+0x26a/0x440 drivers/usb/class/cdc-wdm.c:779 __fput+0x3f6/0xb60 fs/file_table.c:431 task_work_run+0x14e/0x250 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xadd/0x2ce0 kernel/exit.c:939 do_group_exit+0xd3/0x2a0 kernel/exit.c:1088 get_signal+0x25fb/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbb151fc990 RSP: 002b:00007fbb13e4fb70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: 0000000000000009 RBX: 0000000000000002 RCX: 00007fbb151fc990 RDX: 0000000000000002 RSI: 00007fbb13e4fc10 RDI: 00000000ffffff9c RBP: 00007fbb13e4fc10 R08: 0000000000000000 R09: 00007fbb13e4f987 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbb153b6058 R15: 00007ffd64b95a78 INFO: task syz.4.2703:14193 blocked for more than 143 seconds. Not tainted 6.12.0-rc3-syzkaller-00051-g07b887f8236e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.4.2703 state:D stack:28496 pid:14193 tgid:14192 ppid:2651 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 __schedule_loop kernel/sched/core.c:6759 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6774 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 usb_open+0x186/0x220 drivers/usb/core/file.c:47 chrdev_open+0x237/0x6a0 fs/char_dev.c:414 do_dentry_open+0x6cb/0x1390 fs/open.c:958 vfs_open+0x82/0x3f0 fs/open.c:1088 do_open fs/namei.c:3774 [inline] path_openat+0x1e6a/0x2d60 fs/namei.c:3933 do_filp_open+0x1dc/0x430 fs/namei.c:3960 do_sys_openat2+0x17a/0x1e0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1441 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda7049c990 RSP: 002b:00007fda6f116b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fda7049c990 RDX: 0000000000000002 RSI: 00007fda6f116c10 RDI: 00000000ffffff9c RBP: 00007fda6f116c10 R08: 0000000000000000 R09: 00007fda6f116987 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fda70655f80 R15: 00007ffec69f5578 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 2 locks held by getty/2607: #0: ffff888108ae70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 6 locks held by kworker/0:2/4928: 3 locks held by kworker/1:4/4934: #0: ffff888100eed548 ((wq_completion)pm){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc900022bfd80 ((work_completion)(&dev->power.work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 #2: ffff888105f2f508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3206 [inline] #2: ffff888105f2f508 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_port_suspend+0x255/0xf10 drivers/usb/core/hub.c:3463 2 locks held by kworker/1:7/11928: #0: ffff888100080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90011977d80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 1 lock held by syz.3.2700/14179: #0: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_release+0x4b/0x440 drivers/usb/class/cdc-wdm.c:764 2 locks held by syz.4.2703/14193: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.1.2744/15008: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.1.2744/15013: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.0.2745/15046: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.2.2751/15266: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.3.2756/15277: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.1.2754/16842: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.4.2812/17195: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.2.2814/17224: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.3.2768/17287: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.0.2824/17436: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.1.2829/18439: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.2.2836/19662: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.4.2837/19670: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.3.2827/19729: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.3.2827/19730: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.3.2827/19738: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 2 locks held by syz.0.2828/19829: #0: ffffffff899dae90 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x23/0x220 drivers/usb/core/file.c:38 #1: ffffffff89a96908 (wdm_mutex){+.+.}-{3:3}, at: wdm_open+0x5d/0x630 drivers/usb/class/cdc-wdm.c:715 1 lock held by syz-executor/20045: #0: ffffffff88ec69f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00051-g07b887f8236e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf0c/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 20045 Comm: syz-executor Not tainted 6.12.0-rc3-syzkaller-00051-g07b887f8236e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:rcu_read_lock include/linux/rcupdate.h:847 [inline] RIP: 0010:mod_memcg_page_state include/linux/memcontrol.h:984 [inline] RIP: 0010:vfree+0x20d/0x890 mm/vmalloc.c:3356 Code: c1 e8 03 42 80 3c 28 00 0f 85 c5 05 00 00 4d 8b 24 24 4d 85 e4 0f 84 50 01 00 00 e8 2d 9f b2 ff 0f 1f 44 00 00 e8 23 9f b2 ff ee d4 98 ff 45 31 c9 45 31 c0 31 d2 31 f6 b9 02 00 00 00 48 c7 RSP: 0018:ffffc90011b0fa50 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8881170f5e00 RCX: ffffffff81a33fac RDX: ffff888118a61d40 RSI: ffffffff81a33ffd RDI: 0000000000000004 RBP: 000000000000016e R08: 0000000000000004 R09: 0000000000000200 R10: 000000000000016e R11: 0000000000000000 R12: ffffea0005459d00 R13: dffffc0000000000 R14: ffffed1022e1ebc4 R15: ffff8881170f5e2c FS: 0000000000000000(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f18cec72440 CR3: 0000000115b50000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcov_put kernel/kcov.c:439 [inline] kcov_put+0x2a/0x40 kernel/kcov.c:435 kcov_close+0xd/0x20 kernel/kcov.c:535 __fput+0x3f6/0xb60 fs/file_table.c:431 task_work_run+0x14e/0x250 kernel/task_work.c:228 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xadd/0x2ce0 kernel/exit.c:939 do_group_exit+0xd3/0x2a0 kernel/exit.c:1088 get_signal+0x25fb/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f69ae33dbfb Code: Unable to access opcode bytes at 0x7f69ae33dbd1. RSP: 002b:00007ffdf36a5e10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffed RBX: 0000000000000005 RCX: 00007f69ae33dbfb RDX: 00007ffdf36a5e70 RSI: 0000000000008933 RDI: 0000000000000005 RBP: 00007ffdf36a5e70 R08: 0000000000000003 R09: 00305f6576616c73 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000003 R13: 00007f69af024620 R14: 0000000000000000 R15: 0000000000000000