INFO: task dhcpcd:11074 blocked for more than 143 seconds. Not tainted 6.2.0-rc5-syzkaller-00020-g7bf70dbb1882 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:29080 pid:11074 ppid:4645 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 exp_funnel_lock kernel/rcu/tree_exp.h:315 [inline] synchronize_rcu_expedited+0x6ec/0x780 kernel/rcu/tree_exp.h:946 synchronize_rcu+0x306/0x3b0 kernel/rcu/tree.c:3543 synchronize_net+0x4e/0x60 net/core/dev.c:10749 __unregister_prot_hook+0x48a/0x5a0 net/packet/af_packet.c:382 packet_do_bind+0x8bc/0xdc0 net/packet/af_packet.c:3227 packet_bind+0x156/0x1b0 net/packet/af_packet.c:3311 __sys_bind+0x1ed/0x260 net/socket.c:1776 __do_sys_bind net/socket.c:1787 [inline] __se_sys_bind net/socket.c:1785 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1785 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f17274c3ce7 RSP: 002b:00007ffc32bb4ff8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 0000558362177b60 RCX: 00007f17274c3ce7 RDX: 0000000000000014 RSI: 00007ffc32bb5008 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000558363103ba0 R09: 00007f1727584a60 R10: 0000000000200000 R11: 0000000000000217 R12: 0000558363105a10 R13: 0000558363103a88 R14: 00007ffc32bd58dc R15: 00007ffc32bd5904 INFO: task dhcpcd:11107 blocked for more than 144 seconds. Not tainted 6.2.0-rc5-syzkaller-00020-g7bf70dbb1882 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:29080 pid:11107 ppid:4645 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:5293 [inline] __schedule+0xb8a/0x5450 kernel/sched/core.c:6606 schedule+0xde/0x1b0 kernel/sched/core.c:6682 exp_funnel_lock kernel/rcu/tree_exp.h:315 [inline] synchronize_rcu_expedited+0x6ec/0x780 kernel/rcu/tree_exp.h:946 synchronize_rcu+0x306/0x3b0 kernel/rcu/tree.c:3543 synchronize_net+0x4e/0x60 net/core/dev.c:10749 __unregister_prot_hook+0x48a/0x5a0 net/packet/af_packet.c:382 packet_do_bind+0x8bc/0xdc0 net/packet/af_packet.c:3227 packet_bind+0x156/0x1b0 net/packet/af_packet.c:3311 __sys_bind+0x1ed/0x260 net/socket.c:1776 __do_sys_bind net/socket.c:1787 [inline] __se_sys_bind net/socket.c:1785 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1785 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f17274c3ce7 RSP: 002b:00007ffc32bb4ff8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 0000558362177b60 RCX: 00007f17274c3ce7 RDX: 0000000000000014 RSI: 00007ffc32bb5008 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000558363103d20 R09: 00007f1727584a60 R10: 0000000000200000 R11: 0000000000000217 R12: 0000558363105a10 R13: 0000558363103c08 R14: 00007ffc32bd58dc R15: 00007ffc32bd5904 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8c790fb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8c790cb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8c791b00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494 2 locks held by getty/4751: #0: ffff888029778098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177 3 locks held by kworker/1:1/5219: 3 locks held by kworker/0:8/5228: 2 locks held by dhcpcd/10944: #0: ffff88806c8e9410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #0: ffff88806c8e9410 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649 #1: ffffffff8c79c7b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #1: ffffffff8c79c7b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24f/0x780 kernel/rcu/tree_exp.h:946 2 locks held by dhcpcd/10945: #0: ffff88807c718130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] #0: ffff88807c718130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194 #1: ffffffff8c79c7b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #1: ffffffff8c79c7b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24f/0x780 kernel/rcu/tree_exp.h:946 1 lock held by dhcpcd/11074: #0: ffff88801def8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] #0: ffff88801def8130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/11107: #0: ffff88801e808130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] ffff88801e808130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/11408: #0: ffff888020100130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] #0: ffff888020100130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194 1 lock held by dhcpcd/11525: #0: ffff888146a18130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1725 [inline] #0: ffff888146a18130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194 3 locks held by syz-executor210/30056: #0: ffff8880b983b598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:537 #1: ffff8880b98287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2de/0x930 kernel/sched/psi.c:976 #2: ffff8880650a95b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:350 [inline] #2: ffff8880650a95b8 (ptlock_ptr(page)#2){+.+.}-{2:2}, at: filemap_map_pages+0x9be/0x1a80 mm/filemap.c:3381 1 lock held by syz-executor210/30074: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc5-syzkaller-00020-g7bf70dbb1882 #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+0xd1/0x138 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x333/0x3c0 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+0xc75/0xfc0 kernel/hung_task.c:377 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5184 Comm: syz-executor210 Not tainted 6.2.0-rc5-syzkaller-00020-g7bf70dbb1882 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 RIP: 0010:page_zonenum include/linux/mmzone.h:976 [inline] RIP: 0010:is_zone_device_page include/linux/mmzone.h:987 [inline] RIP: 0010:is_device_private_page include/linux/memremap.h:162 [inline] RIP: 0010:page_try_dup_anon_rmap.constprop.0+0x1b9/0xd10 include/linux/rmap.h:253 Code: 48 c1 ea 03 80 3c 02 00 0f 85 0f 0a 00 00 48 8b 5d 00 31 ff 48 c1 eb 11 83 e3 01 89 de e8 9f 89 c6 ff 84 db 0f 84 6b 02 00 00 22 8d c6 ff 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 RSP: 0018:ffffc900043bf738 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff81bad401 RDX: ffff88802bfb1d40 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffffea0001cf2000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801cd180e0 R13: ffffea0001cf2008 R14: 0000000000000000 R15: ffffea0001cf2034 FS: 0000555555e8f400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f46d02dc1b8 CR3: 000000007e2ef000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_present_pte mm/memory.c:913 [inline] copy_pte_range mm/memory.c:1038 [inline] copy_pmd_range mm/memory.c:1124 [inline] copy_pud_range mm/memory.c:1161 [inline] copy_p4d_range mm/memory.c:1185 [inline] copy_page_range+0x16f4/0x3b40 mm/memory.c:1283 dup_mmap+0xc10/0x10b0 kernel/fork.c:694 dup_mm kernel/fork.c:1548 [inline] copy_mm kernel/fork.c:1597 [inline] copy_process+0x440f/0x7520 kernel/fork.c:2266 kernel_clone+0xeb/0x990 kernel/fork.c:2681 __do_sys_clone+0xba/0x100 kernel/fork.c:2822 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f46d025a39b Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00 RSP: 002b:00007f46d040fca0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00000000001f1f57 RCX: 00007f46d025a39b RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555555e8f400 R10: 0000555555e8f6d0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f46d040fd40 R14: 0000000000000a33 R15: 00007f46d040fd20