INFO: task kworker/u4:23:23146 blocked for more than 145 seconds. Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:23 state:D stack:23864 pid:23146 ppid:2 flags:0x00004000 Workqueue: netns cleanup_net Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0x9d1/0xe40 kernel/sched/core.c:6555 schedule+0xcb/0x190 kernel/sched/core.c:6631 rxrpc_destroy_all_calls+0x585/0x680 net/rxrpc/call_object.c:733 rxrpc_exit_net+0x6a/0xc0 net/rxrpc/net_ns.c:125 ops_exit_list net/core/net_namespace.c:169 [inline] cleanup_net+0x758/0xc60 net/core/net_namespace.c:606 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d523910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d524110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8d523740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/4739: #0: ffff88802c263098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177 3 locks held by kworker/u4:23/23146: #0: ffff8880129db138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90004e1fd00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 #2: ffffffff8e657d10 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf0/0xc60 net/core/net_namespace.c:568 2 locks held by kworker/u4:25/23150: #0: ffff888012879138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262 #1: ffffc90004e4fd00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264 2 locks held by syz-executor.5/1475: #0: ffff8880b983a1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x110 kernel/sched/core.c:537 #1: ffff8880b9827748 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x682/0xa30 kernel/sched/psi.c:976 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x4e3/0x560 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x19b/0x3e0 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+0xcd5/0xd20 kernel/hung_task.c:377 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 23150 Comm: kworker/u4:25 Not tainted 6.1.0-syzkaller-13822-g6feb57c2fd7c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: phy22 ieee80211_iface_work RIP: 0010:stackdepot_memcmp lib/stackdepot.c:289 [inline] RIP: 0010:find_stack lib/stackdepot.c:306 [inline] RIP: 0010:__stack_depot_save+0x19b/0x4a0 lib/stackdepot.c:452 Code: 8b 36 4d 85 f6 74 34 45 39 6e 08 75 f2 41 39 6e 0c 75 ec 31 c0 66 2e 0f 1f 84 00 00 00 00 00 49 8b 0c c7 49 3b 4c c6 18 75 d5 <48> ff c0 41 39 c4 75 ed 4d 85 f6 0f 85 89 02 00 00 45 84 c9 74 0e RSP: 0018:ffffc90004e4f0e8 EFLAGS: 00000246 RAX: 0000000000000007 RBX: 00000000000fe798 RCX: ffffffff815ca51c RDX: ffffc90004e4f1a4 RSI: 0000000000000001 RDI: 0000000000000b20 RBP: 000000000000000b R08: 000000000000000b R09: 0000000000000001 R10: fffff520009c9e04 R11: 1ffff920009c9e02 R12: 000000000000000b R13: 00000000da7fe798 R14: ffff888029a7c120 R15: ffffc90004e4f150 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31321000 CR3: 0000000031c7c000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_save_stack mm/kasan/common.c:46 [inline] kasan_set_track+0x61/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:968 [inline] __kmalloc+0xaf/0x190 mm/slab_common.c:981 kmalloc include/linux/slab.h:584 [inline] kzalloc include/linux/slab.h:720 [inline] ieee802_11_parse_elems_full+0xff/0x2ad0 net/mac80211/util.c:1655 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2260 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2267 [inline] ieee80211_bss_info_update+0x945/0x1030 net/mac80211/scan.c:212 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x19a8/0x2d00 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1635 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308