INFO: task udevd:2405 blocked for more than 143 seconds. Not tainted 6.10.0-syzkaller-g933069701c1b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:24336 pid:2405 tgid:2405 ppid:1 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xcda/0x2f80 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x124/0x330 kernel/locking/rwsem.c:1528 kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159 d_revalidate fs/namei.c:868 [inline] d_revalidate fs/namei.c:865 [inline] lookup_fast+0x239/0x540 fs/namei.c:1679 walk_component+0x5b/0x5b0 fs/namei.c:2035 link_path_walk.part.0.constprop.0+0x669/0xd40 fs/namei.c:2404 link_path_walk fs/namei.c:2335 [inline] path_lookupat+0x93/0x770 fs/namei.c:2565 filename_lookup+0x1e5/0x5b0 fs/namei.c:2595 do_readlinkat+0xcf/0x390 fs/stat.c:537 __do_sys_readlink fs/stat.c:574 [inline] __se_sys_readlink fs/stat.c:571 [inline] __x64_sys_readlink+0x78/0xc0 fs/stat.c:571 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: 0033:0x7f0178b21d47 RSP: 002b:00007ffdd03dab48 EFLAGS: 00000246 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 00007ffdd03dab58 RCX: 00007f0178b21d47 RDX: 0000000000000400 RSI: 00007ffdd03dab58 RDI: 00007ffdd03db038 RBP: 0000000000000400 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdd03db038 R13: 00007ffdd03dafa8 R14: 0000558136dce910 R15: 0000000000000000 INFO: task syz-executor:2509 blocked for more than 143 seconds. Not tainted 6.10.0-syzkaller-g933069701c1b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:24560 pid:2509 tgid:2509 ppid:1 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xcda/0x2f80 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086 __down_read_common kernel/locking/rwsem.c:1250 [inline] __down_read kernel/locking/rwsem.c:1263 [inline] down_read+0x124/0x330 kernel/locking/rwsem.c:1528 kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159 d_revalidate fs/namei.c:868 [inline] d_revalidate fs/namei.c:865 [inline] lookup_fast+0x239/0x540 fs/namei.c:1679 walk_component+0x5b/0x5b0 fs/namei.c:2035 link_path_walk.part.0.constprop.0+0x669/0xd40 fs/namei.c:2404 link_path_walk fs/namei.c:2336 [inline] path_openat+0x238/0x2d20 fs/namei.c:3882 do_filp_open+0x1dc/0x430 fs/namei.c:3913 do_sys_openat2+0x17a/0x1e0 fs/open.c:1416 do_sys_open fs/open.c:1431 [inline] __do_sys_openat fs/open.c:1447 [inline] __se_sys_openat fs/open.c:1442 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1442 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: 0033:0x7f88fb2d5811 RSP: 002b:00007ffda1ea2c60 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000266 RCX: 00007f88fb2d5811 RDX: 0000000000090800 RSI: 00007f88fb343a0a RDI: 00000000ffffff9c RBP: 00007ffda1ea2d1c R08: 000000000001581a R09: 00007f88fb43a080 R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffda1ea2d90 R13: 0000000000000000 R14: 0000000000075b31 R15: 0000000000075535 INFO: task udevd:4841 blocked for more than 144 seconds. Not tainted 6.10.0-syzkaller-g933069701c1b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:24720 pid:4841 tgid:4841 ppid:2405 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xcda/0x2f80 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 device_lock include/linux/device.h:1009 [inline] uevent_show+0x188/0x3b0 drivers/base/core.c:2743 dev_attr_show+0x53/0xe0 drivers/base/core.c:2437 sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59 seq_read_iter+0x4fa/0x12c0 fs/seq_file.c:230 kernfs_fop_read_iter+0x41a/0x590 fs/kernfs/file.c:279 new_sync_read fs/read_write.c:395 [inline] vfs_read+0x869/0xbd0 fs/read_write.c:476 ksys_read+0x12f/0x260 fs/read_write.c:619 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: 0033:0x7f0178b20b6a RSP: 002b:00007ffdd03d3b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000558136df4530 RCX: 00007f0178b20b6a RDX: 0000000000001000 RSI: 0000558136deb960 RDI: 0000000000000008 RBP: 0000558136df4530 R08: 0000000000000008 R09: 0000000000000008 R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000003fff R14: 00007ffdd03d4048 R15: 000000000000000a INFO: task udevd:4842 blocked for more than 145 seconds. Not tainted 6.10.0-syzkaller-g933069701c1b #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:25328 pid:4842 tgid:4842 ppid:2405 flags:0x00004002 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0xcda/0x2f80 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6621 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 device_lock include/linux/device.h:1009 [inline] uevent_show+0x188/0x3b0 drivers/base/core.c:2743 dev_attr_show+0x53/0xe0 drivers/base/core.c:2437 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff886b67a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff886b67a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff886b67a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620 2 locks held by kworker/u8:2/36: #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc90000267d80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 3 locks held by kworker/1:1/43: 1 lock held by udevd/2405: #0: ffff888100aae948 (&root->kernfs_rwsem){++++}-{3:3}, at: kernfs_dop_revalidate+0xf0/0x5a0 fs/kernfs/dir.c:1159 2 locks held by getty/2463: #0: ffff888107aa60a0 (&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+0xfc8/0x1490 drivers/tty/n_tty.c:2211 6 locks held by kworker/0:3/4778: #0: ffff8881052d4148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc9000208fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 #2: ffff888109b8e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #2: ffff888109b8e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f50 drivers/usb/core/hub.c:5849 #3: ffff88811e448190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #3: ffff88811e448190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x920 drivers/usb/core/hub.c:2295 #4: ffff88811374b160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline] #4: ffff88811374b160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1093 [inline] #4: ffff88811374b160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1290 #5: ffffffff893003e8 (input_mutex){+.+.}-{3:3}, at: __input_unregister_device+0x136/0x450 drivers/input/input.c:2275 3 locks held by kworker/0:4/4812: 2 locks held by kworker/0:5/4815: #0: ffff888100080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206 #1: ffffc9000226fd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207 6 locks held by kworker/1:5/4865: 1 lock held by syz.3.926/8610: #0: ffff8881f643d998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:560 [inline] #0: ffff8881f643d998 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1415 [inline] #0: ffff8881f643d998 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1714 [inline] #0: ffff8881f643d998 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x28e/0x2f80 kernel/sched/core.c:6436 1 lock held by syz.2.927/8612: 1 lock held by syz-executor/8620: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-syzkaller-g933069701c1b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119 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+0xf4e/0x1280 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7126 Comm: syz-executor Not tainted 6.10.0-syzkaller-g933069701c1b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:get_lock_parent_ip include/linux/ftrace.h:974 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:5634 [inline] RIP: 0010:preempt_latency_start kernel/sched/core.c:5631 [inline] RIP: 0010:preempt_count_add+0x69/0x150 kernel/sched/core.c:5659 Code: 3d cc 37 0c 85 d2 75 0b 65 8b 05 fa 09 dd 7e 3c f4 77 6b 65 8b 05 ef 09 dd 7e 25 ff ff ff 7f 39 c3 74 07 5b 5d c3 cc cc cc cc <48> 8b 5c 24 10 48 89 df e8 da 12 0b 00 85 c0 75 38 65 48 8b 2d be RSP: 0018:ffffc9000239f6b0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffffffff1abd120 RDX: 0000000000000000 RSI: ffffffff81155e8b RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9000239f748 R13: ffffffff813f2220 R14: ffffc9000239f808 R15: ffff888116293a00 FS: 0000000000000000(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f57a4e16000 CR3: 0000000119962000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0xce/0x23a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 save_stack+0x162/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x8d/0x400 mm/page_owner.c:297 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0x698/0xce0 mm/page_alloc.c:2608 vfree+0x181/0x7a0 mm/vmalloc.c:3364 kcov_put kernel/kcov.c:429 [inline] kcov_put+0x2a/0x40 kernel/kcov.c:425 kcov_close+0x10/0x20 kernel/kcov.c:525 __fput+0x408/0xbb0 fs/file_table.c:422 task_work_run+0x14e/0x250 kernel/task_work.c:222 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xaa3/0x2b30 kernel/exit.c:882 do_group_exit+0xd3/0x2a0 kernel/exit.c:1031 get_signal+0x25fd/0x2770 kernel/signal.c:2917 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310 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: 0033:0x7fc18e695811 Code: Unable to access opcode bytes at 0x7fc18e6957e7. RSP: 002b:00007ffc8f28d2c0 EFLAGS: 00000287 ORIG_RAX: 0000000000000101 RAX: fffffffffffffffe RBX: 00000000000000c9 RCX: 00007fc18e695811 RDX: 0000000000090800 RSI: 00007fc18e703a0a RDI: 00000000ffffff9c RBP: 00007ffc8f28d37c R08: 000000000001592e R09: 00007fc18e7fa080 R10: 0000000000000000 R11: 0000000000000287 R12: 00007ffc8f28d3f0 R13: 0000000000000000 R14: 0000000000075e4d R15: 0000000000075e4d