INFO: task syz.3.858:9226 blocked for more than 143 seconds. Not tainted 6.14.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.858 state:D stack:27360 pid:9226 tgid:9226 ppid:5816 task_flags:0x400040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5378 [inline] __schedule+0xf43/0x5890 kernel/sched/core.c:6765 __schedule_loop kernel/sched/core.c:6842 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6857 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914 __mutex_lock_common kernel/locking/mutex.c:662 [inline] __mutex_lock+0x6bd/0xb10 kernel/locking/mutex.c:730 tty_release_struct+0xad/0xe0 drivers/tty/tty_io.c:1700 tty_release+0xe25/0x1410 drivers/tty/tty_io.c:1861 __fput+0x3ff/0xb70 fs/file_table.c:464 task_work_run+0x14e/0x250 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x27b/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb6c598d169 RSP: 002b:00007ffc391be3f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb6c5ba7ba0 RCX: 00007fb6c598d169 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb6c5ba7ba0 R08: 0000000000000128 R09: 00000011391be6ef R10: 00000000003ffcb4 R11: 0000000000000246 R12: 0000000000052060 R13: 00007ffc391be4f0 R14: ffffffffffffffff R15: 00007ffc391be510 Showing all locks held in the system: 1 lock held by kthreadd/2: 2 locks held by kworker/0:0/9: 3 locks held by kworker/u8:0/12: 3 locks held by kworker/u8:1/13: 2 locks held by kworker/1:0/26: 1 lock held by khungtaskd/31: #0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e1bd140 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6746 2 locks held by kworker/u8:2/36: 4 locks held by kworker/1:1/46: 3 locks held by kworker/u8:3/53: 5 locks held by kworker/u8:4/69: 2 locks held by kswapd0/89: 4 locks held by kworker/0:2/969: 2 locks held by kworker/u8:5/1104: 2 locks held by kworker/1:2/2149: 3 locks held by kworker/R-ipv6_/3164: #0: ffff88814d38e948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213 #1: ffffc9000c997cb0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214 #2: ffffffff8fef8428 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:129 [inline] #2: ffffffff8fef8428 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4733 4 locks held by kworker/R-bat_e/3394: 3 locks held by kworker/u8:6/3570: 3 locks held by kworker/u8:7/4209: 3 locks held by kworker/u8:8/4254: 2 locks held by syslogd/5176: 1 lock held by klogd/5183: 4 locks held by udevd/5194: 2 locks held by dhcpcd/5487: 1 lock held by dhcpcd/5488: 2 locks held by getty/5587: #0: ffff88814d5a70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc9000330b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 1 lock held by syz-executor/5806: 1 lock held by syz-executor/5821: 6 locks held by kworker/u9:9/5837: #0: ffff88802527f948 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213 #1: ffffc9000422fd18 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214 #2: ffff88803516cd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x170/0x410 net/bluetooth/hci_sync.c:331 #3: ffff88803516c078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x147/0xb40 net/bluetooth/hci_sync.c:5569 #4: ffffffff90165608 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2026 [inline] #4: ffffffff90165608 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x14f/0x330 net/bluetooth/hci_conn.c:1266 #5: ffff888030f3f338 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x7f/0x730 net/bluetooth/l2cap_core.c:1761 2 locks held by kworker/1:3/5863: 5 locks held by kworker/0:3/5870: 4 locks held by kworker/1:4/5871: 4 locks held by kworker/1:7/5902: #0: ffff88803254b948 ((wq_completion)wg-kex-wg1#10){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213 #1: ffffc900048dfd18 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"((typeof(*((worker))) *)(( unsigned long)((worker))))); (typeof((typeof(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214 #2: ffff8880637a5308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x1c3/0x880 drivers/net/wireguard/noise.c:598 #3: ffff888061ed58b8 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x5ae/0x880 drivers/net/wireguard/noise.c:632 5 locks held by kworker/0:5/5913: 3 locks held by kworker/u8:9/6362: 3 locks held by kworker/u8:10/6463: 3 locks held by kworker/u8:11/6548: 3 locks held by kworker/u8:12/6549: 2 locks held by syz.4.693/8730: 1 lock held by syz.2.839/9167: 4 locks held by kworker/0:6/9180: 2 locks held by syz.0.845/9189: #0: ffffffff8fef8428 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:698 [inline] #0: ffffffff8fef8428 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x38/0x230 drivers/net/tun.c:3517 #1: ffffffff8e1c85b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:334 4 locks held by syz.4.854/9220: 5 locks held by udevd/9223: 3 locks held by syz-executor/9225: 1 lock held by syz.3.858/9226: #0: ffffffff8ee888e8 (tty_mutex){+.+.}-{4:4}, at: tty_release_struct+0xad/0xe0 drivers/tty/tty_io.c:1700 2 locks held by syz-executor/9230: 4 locks held by kworker/1:5/9236: #0: ffff888031a8e548 ((wq_completion)wg-kex-wg2#10){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3213 #1: ffffc9000443fd18 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ({ unsigned long __ptr; __asm__ ("" : "=r"(__ptr) : "0"((typeof(*((worker))) *)(( unsigned long)((worker))))); (typeof((typeof(*((worker))) *)(( unsigned long)((worker))))) (__ptr + (((__per_cpu_offset[(cpu)])))); }); })->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3214 #2: ffff88807d131308 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x1c3/0x880 drivers/net/wireguard/noise.c:598 #3: ffff888061ed6238 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x5ae/0x880 drivers/net/wireguard/noise.c:632 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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:236 [inline] watchdog+0xf62/0x12b0 kernel/hung_task.c:399 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 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: 3394 Comm: kworker/R-bat_e Not tainted 6.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: bat_events batadv_tt_purge RIP: 0010:unwind_next_frame+0x158b/0x20c0 arch/x86/kernel/unwind_orc.c:648 Code: 00 e9 2e f8 ff ff 48 8d 79 02 48 ba 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 0f b6 34 10 48 8d 41 03 49 89 c0 49 c1 e8 03 <41> 0f b6 14 10 49 89 f8 41 83 e0 07 44 38 c6 41 0f 9e c0 40 84 f6 RSP: 0018:ffffc90000006838 EFLAGS: 00000a07 RAX: ffffffff91942f3d RBX: 0000000000000002 RCX: ffffffff91942f3a RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffffffff91942f3c RBP: ffffc900000068f0 R08: 1ffffffff23285e7 R09: ffffffff91942f3e R10: ffffc900000068a8 R11: 0000000000093407 R12: ffffc900000068f8 R13: ffffc900000068a8 R14: ffffc90000007728 R15: ffffc90000007720 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555568a195c8 CR3: 000000007629c000 CR4: 00000000003526f0 DR0: 0000000000007097 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x2e2/0x4d0 mm/slub.c:4711 __skb_ext_put+0x102/0x2c0 net/core/skbuff.c:7011 __skb_ext_del+0xf3/0x340 net/core/skbuff.c:6978 skb_ext_del include/linux/skbuff.h:4911 [inline] nf_bridge_info_free net/bridge/br_netfilter_hooks.c:156 [inline] br_nf_dev_queue_xmit+0x7a3/0x2c50 net/bridge/br_netfilter_hooks.c:922 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] br_nf_post_routing+0x8ee/0x11b0 net/bridge/br_netfilter_hooks.c:969 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269 NF_HOOK include/linux/netfilter.h:312 [inline] br_forward_finish+0xcd/0x130 net/bridge/br_forward.c:66 br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1170 br_nf_forward_finish+0x66a/0xba0 net/bridge/br_netfilter_hooks.c:665 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] br_nf_forward_ip.part.0+0x610/0x820 net/bridge/br_netfilter_hooks.c:719 br_nf_forward_ip net/bridge/br_netfilter_hooks.c:679 [inline] br_nf_forward+0xf11/0x1bd0 net/bridge/br_netfilter_hooks.c:776 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xbb/0x200 net/netfilter/core.c:626 nf_hook+0x474/0x7d0 include/linux/netfilter.h:269 NF_HOOK include/linux/netfilter.h:312 [inline] __br_forward+0x1be/0x5b0 net/bridge/br_forward.c:115 deliver_clone+0x5b/0xa0 net/bridge/br_forward.c:131 maybe_deliver+0xa7/0x120 net/bridge/br_forward.c:190 br_flood+0x17b/0x5e0 net/bridge/br_forward.c:237 br_handle_frame_finish+0xea2/0x1c90 net/bridge/br_input.c:220 br_nf_hook_thresh+0x303/0x410 net/bridge/br_netfilter_hooks.c:1170 br_nf_pre_routing_finish_ipv6+0x76a/0xfb0 net/bridge/br_netfilter_ipv6.c:154 NF_HOOK include/linux/netfilter.h:314 [inline] br_nf_pre_routing_ipv6+0x3ce/0x8c0 net/bridge/br_netfilter_ipv6.c:184 br_nf_pre_routing+0x860/0x15b0 net/bridge/br_netfilter_hooks.c:508 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_bridge_pre net/bridge/br_input.c:282 [inline] br_handle_frame+0xad7/0x14a0 net/bridge/br_input.c:433 __netif_receive_skb_core.constprop.0+0xa20/0x4330 net/core/dev.c:5790 __netif_receive_skb_one_core+0xb1/0x1e0 net/core/dev.c:5894 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6009 process_backlog+0x443/0x15f0 net/core/dev.c:6357 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7191 napi_poll net/core/dev.c:7260 [inline] net_rx_action+0xa94/0x1010 net/core/dev.c:7382 handle_softirqs+0x213/0x8f0 kernel/softirq.c:561 do_softirq kernel/softirq.c:462 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:449 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:389 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x21c/0x3c0 net/batman-adv/translation-table.c:1315 batadv_tt_purge+0x86/0xb90 net/batman-adv/translation-table.c:3509 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] rescuer_thread+0x616/0xe80 kernel/workqueue.c:3496 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 net_ratelimit: 29381 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 30506 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:d2:21:04:4f:81:74, vlan:0)