INFO: task kworker/1:0:5048 blocked for more than 143 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:23632 pid:5048 ppid:2 flags:0x00004000 Workqueue: rcu_gp wait_rcu_exp_gp Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 rcu_exp_wait_wake+0x106/0x1550 kernel/rcu/tree_exp.h:698 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2554 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor.1:5069 blocked for more than 143 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:23752 pid:5069 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 synchronize_rcu_expedited+0x5d4/0x770 kernel/rcu/tree_exp.h:1007 namespace_unlock+0x1af/0x410 fs/namespace.c:1499 do_umount fs/namespace.c:1722 [inline] path_umount+0x67b/0x10b0 fs/namespace.c:1804 ksys_umount fs/namespace.c:1827 [inline] __do_sys_umount fs/namespace.c:1832 [inline] __se_sys_umount fs/namespace.c:1830 [inline] __x64_sys_umount+0x15d/0x190 fs/namespace.c:1830 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: 0033:0x7fade708d5d7 RSP: 002b:00007fff1ce6fdd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fade708d5d7 RDX: 00007fff1ce6feab RSI: 000000000000000a RDI: 00007fff1ce6fea0 RBP: 00007fff1ce6fea0 R08: 00000000ffffffff R09: 00007fff1ce6fc70 R10: 00005555558828e3 R11: 0000000000000246 R12: 00007fade70e6cdc R13: 00007fff1ce70f60 R14: 0000555555882810 R15: 00007fff1ce70fa0 INFO: task kworker/u4:12:5351 blocked for more than 144 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:12 state:D stack:23872 pid:5351 ppid:2 flags:0x00004000 Workqueue: phy6 ieee80211_scan_work Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992 synchronize_rcu+0x2f1/0x3a0 kernel/rcu/tree.c:3535 __ieee80211_scan_completed+0x2be/0xe10 net/mac80211/scan.c:478 ieee80211_scan_work+0x3c8/0x1d90 net/mac80211/scan.c:1161 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2554 kthread+0x344/0x440 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task dhcpcd:25617 blocked for more than 144 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:28696 pid:25617 ppid:4670 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 exp_funnel_lock kernel/rcu/tree_exp.h:316 [inline] synchronize_rcu_expedited+0x6f8/0x770 kernel/rcu/tree_exp.h:992 synchronize_rcu+0x2f1/0x3a0 kernel/rcu/tree.c:3535 synchronize_net+0x4e/0x60 net/core/dev.c:10791 __unregister_prot_hook+0x4b3/0x5c0 net/packet/af_packet.c:380 packet_do_bind+0x93f/0xe30 net/packet/af_packet.c:3235 packet_bind+0x15f/0x1c0 net/packet/af_packet.c:3319 __sys_bind+0x1ed/0x260 net/socket.c:1803 __do_sys_bind net/socket.c:1814 [inline] __se_sys_bind net/socket.c:1812 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1812 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: 0033:0x7f3834729677 RSP: 002b:00007ffe03ac77a8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 000055baa8116ca3 RCX: 00007f3834729677 RDX: 0000000000000014 RSI: 00007ffe03ac77b8 RDI: 0000000000000005 RBP: 0000000000000000 R08: 000055baa955c6b0 R09: 0000000000200000 R10: 000000000000006d R11: 0000000000000217 R12: 000055baa9557250 R13: 000055baa955bcf8 R14: 00007ffe03ae809c R15: 000055baa955bcc4 INFO: task dhcpcd:25618 blocked for more than 145 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:28696 pid:25618 ppid:4670 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 exp_funnel_lock kernel/rcu/tree_exp.h:316 [inline] synchronize_rcu_expedited+0x6f8/0x770 kernel/rcu/tree_exp.h:992 synchronize_rcu+0x2f1/0x3a0 kernel/rcu/tree.c:3535 synchronize_net+0x4e/0x60 net/core/dev.c:10791 __unregister_prot_hook+0x4b3/0x5c0 net/packet/af_packet.c:380 packet_do_bind+0x93f/0xe30 net/packet/af_packet.c:3235 packet_bind+0x15f/0x1c0 net/packet/af_packet.c:3319 __sys_bind+0x1ed/0x260 net/socket.c:1803 __do_sys_bind net/socket.c:1814 [inline] __se_sys_bind net/socket.c:1812 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1812 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: 0033:0x7f3834729677 RSP: 002b:00007ffe03ac77a8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 000055baa8116ca3 RCX: 00007f3834729677 RDX: 0000000000000014 RSI: 00007ffe03ac77b8 RDI: 0000000000000005 RBP: 0000000000000000 R08: 000055baa955c6b0 R09: 0000000000200000 R10: 000000000000006d R11: 0000000000000217 R12: 000055baa9557250 R13: 000055baa955e2e8 R14: 00007ffe03ae809c R15: 000055baa955e2b4 INFO: task dhcpcd:25619 blocked for more than 145 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:28696 pid:25619 ppid:4670 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 exp_funnel_lock kernel/rcu/tree_exp.h:316 [inline] synchronize_rcu_expedited+0x6f8/0x770 kernel/rcu/tree_exp.h:992 synchronize_rcu+0x2f1/0x3a0 kernel/rcu/tree.c:3535 synchronize_net+0x4e/0x60 net/core/dev.c:10791 __unregister_prot_hook+0x4b3/0x5c0 net/packet/af_packet.c:380 packet_do_bind+0x93f/0xe30 net/packet/af_packet.c:3235 packet_bind+0x15f/0x1c0 net/packet/af_packet.c:3319 __sys_bind+0x1ed/0x260 net/socket.c:1803 __do_sys_bind net/socket.c:1814 [inline] __se_sys_bind net/socket.c:1812 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1812 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: 0033:0x7f3834729677 RSP: 002b:00007ffe03ac77a8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 000055baa8116ca3 RCX: 00007f3834729677 RDX: 0000000000000014 RSI: 00007ffe03ac77b8 RDI: 0000000000000005 RBP: 0000000000000000 R08: 000055baa955c6b0 R09: 0000000000200000 R10: 000000000000006d R11: 0000000000000217 R12: 000055baa9557250 R13: 000055baa955e468 R14: 00007ffe03ae809c R15: 000055baa955e434 INFO: task dhcpcd:25620 blocked for more than 146 seconds. Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:28696 pid:25620 ppid:4670 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x1d15/0x5790 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 exp_funnel_lock kernel/rcu/tree_exp.h:316 [inline] synchronize_rcu_expedited+0x6f8/0x770 kernel/rcu/tree_exp.h:992 synchronize_rcu+0x2f1/0x3a0 kernel/rcu/tree.c:3535 synchronize_net+0x4e/0x60 net/core/dev.c:10791 __unregister_prot_hook+0x4b3/0x5c0 net/packet/af_packet.c:380 packet_do_bind+0x93f/0xe30 net/packet/af_packet.c:3235 packet_bind+0x15f/0x1c0 net/packet/af_packet.c:3319 __sys_bind+0x1ed/0x260 net/socket.c:1803 __do_sys_bind net/socket.c:1814 [inline] __se_sys_bind net/socket.c:1812 [inline] __x64_sys_bind+0x73/0xb0 net/socket.c:1812 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: 0033:0x7f3834729677 RSP: 002b:00007ffe03ac77a8 EFLAGS: 00000217 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 000055baa8116ca3 RCX: 00007f3834729677 RDX: 0000000000000014 RSI: 00007ffe03ac77b8 RDI: 0000000000000005 RBP: 0000000000000000 R08: 000055baa955c830 R09: 0000000000200000 R10: 000000000000006d R11: 0000000000000217 R12: 000055baa9557250 R13: 000055baa955c718 R14: 00007ffe03ae809c R15: 000055baa955c6e4 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8c798530 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8c798230 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/28: #0: ffffffff8c799140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6559 3 locks held by kworker/0:2/759: 2 locks held by getty/4758: #0: ffff88802c022098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176 3 locks held by syz-fuzzer/5008: #0: ffff88814bff6460 (sb_writers#4){.+.+}-{0:0}, at: do_rmdir+0x1da/0x430 fs/namei.c:4241 #1: ffff888090dd3600 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #1: ffff888090dd3600 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_rmdir+0x225/0x430 fs/namei.c:4245 #2: ffff888089250e00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #2: ffff888089250e00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_rmdir.part.0+0x63/0x5a0 fs/namei.c:4187 3 locks held by kworker/1:0/5048: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378 #1: ffffc900040dfdb0 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382 #2: ffffffff8c7a45c8 (rcu_state.exp_wake_mutex){+.+.}-{3:3}, at: rcu_exp_wait_wake+0x106/0x1550 kernel/rcu/tree_exp.h:698 1 lock held by syz-executor.1/5069: #0: ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992 2 locks held by kworker/u4:9/5333: #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378 #1: ffffc90005557db0 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382 4 locks held by kworker/u4:12/5351: #0: ffff88808aa8a138 ((wq_completion)phy6){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88808aa8a138 ((wq_completion)phy6){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88808aa8a138 ((wq_completion)phy6){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff88808aa8a138 ((wq_completion)phy6){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff88808aa8a138 ((wq_completion)phy6){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff88808aa8a138 ((wq_completion)phy6){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378 #1: ffffc900054f7db0 ((work_completion)(&(&local->scan_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382 #2: ffff88808aa52ac8 (&local->mtx){+.+.}-{3:3}, at: ieee80211_scan_work+0x9c/0x1d90 net/mac80211/scan.c:1072 #3: ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #3: ffffffff8c7a4538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992 2 locks held by kworker/u4:15/5708: #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378 #1: ffffc9000ba77db0 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382 3 locks held by syz-executor.2/25584: 1 lock held by dhcpcd/25617: #0: ffff888082bb0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #0: ffff888082bb0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3202 1 lock held by dhcpcd/25618: #0: ffff88808b2ba130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #0: ffff88808b2ba130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3202 1 lock held by dhcpcd/25619: #0: ffff88808b13e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #0: ffff88808b13e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3202 1 lock held by dhcpcd/25620: #0: ffff888085f0e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #0: ffff888085f0e130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3202 1 lock held by dhcpcd/25621: #0: ffff8880899b4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #0: ffff8880899b4130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3202 1 lock held by dhcpcd/25622: #0: ffff888085348130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline] #0: ffff888085348130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xe30 net/packet/af_packet.c:3202 1 lock held by syz-executor.0/25630: #0: ffff88807de480e0 (&type->s_umount_key#54/1){+.+.}-{3:3}, at: alloc_super+0x22e/0xb60 fs/super.c:228 1 lock held by syz-executor.3/25628: #0: ffff88809b0aee10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #0: ffff88809b0aee10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x290 net/socket.c:652 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xe16/0x1090 kernel/hung_task.c:379 kthread+0x344/0x440 kernel/kthread.c:379 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: 25584 Comm: syz-executor.2 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:__netif_receive_skb_core+0xba/0x3900 net/core/dev.c:5284 Code: 00 00 48 89 84 24 98 01 00 00 31 c0 e8 9f f9 72 f9 4c 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 57 32 00 00 48 8b 44 24 18 48 8b 28 <48> 89 ac 24 90 00 00 00 e9 ea 18 00 00 e8 74 f9 72 f9 0f 1f 44 00 RSP: 0018:ffffc90000007af8 EFLAGS: 00000246 RAX: ffffc90000007d10 RBX: dffffc0000000000 RCX: 0000000000000100 RDX: ffff8880271fbb80 RSI: ffffffff88112a11 RDI: ffffc90000007d10 RBP: ffff888029707a00 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000094001 R12: 0000000000000000 R13: ffff888029707a00 R14: ffff8880841e8000 R15: ffffc90000007d10 FS: 00007f60a8393700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f60a83d59d0 CR3: 000000007a553000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5489 __netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605 process_backlog+0x13e/0x6d0 net/core/dev.c:5933 __napi_poll+0xb3/0x520 net/core/dev.c:6496 napi_poll net/core/dev.c:6563 [inline] net_rx_action+0x8e4/0xd00 net/core/dev.c:6696 __do_softirq+0x1d4/0x905 kernel/softirq.c:553 do_softirq.part.0+0x87/0xc0 kernel/softirq.c:454 do_softirq kernel/softirq.c:446 [inline] __local_bh_enable_ip+0x106/0x130 kernel/softirq.c:381 spin_unlock_bh include/linux/spinlock.h:395 [inline] tcp_metrics_flush_all+0x27c/0x390 net/ipv4/tcp_metrics.c:899 ops_exit_list+0x125/0x170 net/core/net_namespace.c:175 setup_net+0x7fb/0xc50 net/core/net_namespace.c:362 copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x410/0x500 kernel/nsproxy.c:179 copy_process+0x322a/0x7600 kernel/fork.c:2506 kernel_clone+0xeb/0x890 kernel/fork.c:2914 __do_sys_clone3+0x1cd/0x240 kernel/fork.c:3215 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: 0033:0x7f60a768c169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f60a8393038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f60a77ac120 RCX: 00007f60a768c169 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00007f60a8393050 RBP: 00007f60a76e7ca1 R08: 0000000000000000 R09: 0000000000000058 R10: 00007f60a8393050 R11: 0000000000000246 R12: 0000000000000058 R13: 00007fff21e2c78f R14: 00007f60a8393300 R15: 0000000000022000