INFO: task kworker/u4:4:982 blocked for more than 143 seconds. Not tainted 5.18.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:4 state:D stack:26288 pid: 982 ppid: 2 flags:0x00004000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:5076 [inline] __schedule+0x913/0x26c0 kernel/sched/core.c:6391 schedule+0xd2/0x1f0 kernel/sched/core.c:6463 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1911 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x373/0x530 kernel/sched/completion.c:106 __synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:1170 fsnotify_mark_destroy_workfn+0xeb/0x3b0 fs/notify/mark.c:864 process_one_work+0x865/0x13d0 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x738/0xec0 kernel/workqueue.c:2438 kthread+0x299/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Showing all locks held in the system: 2 locks held by ksoftirqd/1/22: 1 lock held by khungtaskd/28: #0: ffffffff8af79e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 1 lock held by khugepaged/35: #0: ffffffff8b05ffc8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x57/0x6d0 mm/swap.c:790 2 locks held by kworker/u4:3/164: #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x13d0 kernel/workqueue.c:2260 #1: ffffc9000269fdb8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x7b7/0x13d0 kernel/workqueue.c:2264 3 locks held by kworker/1:3/169: 2 locks held by kworker/u4:4/982: #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888010069138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x13d0 kernel/workqueue.c:2260 #1: ffffc90004aa7db8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x7b7/0x13d0 kernel/workqueue.c:2264 2 locks held by getty/3313: #0: ffff88814c38a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900028d62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x9d7/0xed0 drivers/tty/n_tty.c:2075 4 locks held by syz-executor.0/4109: #0: ffff88807edd2460 (sb_writers#4){.+.+}-{0:0}, at: do_unlinkat+0x145/0x550 fs/namei.c:4196 #1: ffff88807e8bf258 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:767 [inline] #1: ffff88807e8bf258 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_unlinkat+0x1f1/0x550 fs/namei.c:4200 #2: ffff88806e5f7258 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:732 [inline] #2: ffff88806e5f7258 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: vfs_unlink+0xb7/0x800 fs/namei.c:4138 #3: ffff88807e648688 (&memcg->move_lock){..-.}-{2:2}, at: folio_memcg_lock+0x12c/0x6c0 mm/memcontrol.c:2044 2 locks held by dhcpcd/9712: #0: ffff888067438130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff888067438130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 #1: ffffffff8af84120 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8af84120 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f8/0x610 kernel/rcu/tree_exp.h:927 2 locks held by dhcpcd/9716: #0: ffff8880617a0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff8880617a0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 #1: ffffffff8af84120 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8af84120 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d3/0x610 kernel/rcu/tree_exp.h:927 1 lock held by dhcpcd/9754: #0: ffff8880610bc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff8880610bc130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 1 lock held by dhcpcd/9811: #0: ffff888067172130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff888067172130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 1 lock held by dhcpcd/9836: #0: ffff88801cf78130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff88801cf78130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 1 lock held by dhcpcd/9837: #0: ffff88801c7ce130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff88801c7ce130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 1 lock held by dhcpcd/10660: #0: ffff88807b5f6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff88807b5f6130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 1 lock held by dhcpcd/10688: #0: ffff88807b84a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff88807b84a130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 1 lock held by dhcpcd/10854: #0: ffff8880667b0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff8880667b0130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 1 lock held by dhcpcd/10857: #0: ffff888059364130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1691 [inline] #0: ffff888059364130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x27/0xad0 net/packet/af_packet.c:3192 2 locks held by syz-executor.0/11689: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.18.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x140/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0x891/0xc20 kernel/hung_task.c:378 kthread+0x299/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 169 Comm: kworker/1:3 Not tainted 5.18.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events ipvlan_process_multicast Workqueue: events ipvlan_process_multicast RIP: 0010:unwind_next_frame+0xc7/0x1cc0 arch/x86/kernel/unwind_orc.c:431 Code: 00 00 00 48 89 44 24 18 e8 56 1b 1a 00 49 8d 45 50 48 89 c2 48 89 04 24 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 3f 15 00 00 4d 8b 65 50 4d 85 e4 74 32 49 8d bc 24 88 00 00 RSP: 0018:ffffc90001d4f5b8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 1ffffffff1ed4f00 RDX: 1ffff920003a9ecf RSI: ffffffff81adabad RDI: 0000000000000001 RBP: ffffc90001d4f670 R08: ffffffff8d53eb0c R09: ffffc90001d4f65c R10: fffff520003a9ed0 R11: ffffc90001d4f9f8 R12: ffffc90001d4f6e0 R13: ffffc90001d4f628 R14: ffff8880186aba00 R15: ffffea00016b3a80 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000052f7b0 CR3: 000000005a1b9000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kmem_cache_free+0xdd/0x5a0 mm/slub.c:3524 enqueue_to_backlog+0x1ae/0xad0 net/core/dev.c:4695 netif_rx_internal+0xc9/0x450 net/core/dev.c:4947 ipvlan_process_multicast+0x6f7/0xd30 drivers/net/ipvlan/ipvlan_core.c:274 process_one_work+0x865/0x13d0 kernel/workqueue.c:2289 worker_thread+0x598/0xec0 kernel/workqueue.c:2436 kthread+0x299/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 48 89 add %cl,-0x77(%rax) 5: 44 24 18 rex.R and $0x18,%al 8: e8 56 1b 1a 00 callq 0x1a1b63 d: 49 8d 45 50 lea 0x50(%r13),%rax 11: 48 89 c2 mov %rax,%rdx 14: 48 89 04 24 mov %rax,(%rsp) 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 0f 85 3f 15 00 00 jne 0x156f <-- trapping instruction 30: 4d 8b 65 50 mov 0x50(%r13),%r12 34: 4d 85 e4 test %r12,%r12 37: 74 32 je 0x6b 39: 49 rex.WB 3a: 8d .byte 0x8d 3b: bc 24 88 00 00 mov $0x8824,%esp