INFO: task syz-executor.0:9743 blocked for more than 143 seconds. Not tainted 5.12.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:25648 pid: 9743 ppid: 8398 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0xb98/0x1120 kernel/sched/core.c:5147 schedule+0x14b/0x200 kernel/sched/core.c:5226 schedule_timeout+0x98/0x2c0 kernel/time/timer.c:1868 do_wait_for_common+0x2dd/0x450 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 __flush_work kernel/workqueue.c:3052 [inline] __cancel_work_timer+0x4dc/0x690 kernel/workqueue.c:3139 p9_conn_destroy net/9p/trans_fd.c:891 [inline] p9_fd_close+0x2a2/0x3c0 net/9p/trans_fd.c:921 p9_client_destroy+0xbe/0x6e0 net/9p/client.c:1088 v9fs_session_init+0x13f2/0x18c0 fs/9p/v9fs.c:482 v9fs_mount+0x72/0x870 fs/9p/vfs_super.c:126 legacy_get_tree+0xea/0x180 fs/fs_context.c:592 vfs_get_tree+0x86/0x270 fs/super.c:1497 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x196f/0x2be0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3433 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f3cc9307188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 00000000004665f9 RDX: 0000000020000240 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 00000000004bfce1 R08: 0000000020000580 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158 R13: 00007ffd2feae03f R14: 00007f3cc9307300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1615: #0: ffffffff8cd14580 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 2 locks held by kworker/1:2/3053: #0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7aa/0x10c0 kernel/workqueue.c:2248 #1: ffffc9000205fd20 ((work_completion)(&m->wq)){+.+.}-{0:0}, at: process_one_work+0x7e8/0x10c0 kernel/workqueue.c:2250 1 lock held by in:imklog/8080: #0: ffff88801a1e3770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:974 4 locks held by kworker/0:2/8370: #0: ffff8880b9a34cd8 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x86f/0xc60 kernel/sched/fair.c:10665 #1: ffff8880b9a1f808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4b3/0x7a0 kernel/sched/psi.c:863 #2: ffffffff8cbf09f8 ((console_sem).lock){....}-{2:2}, at: down_trylock+0x1c/0x90 kernel/locking/semaphore.c:135 #3: ffffffff90f4ffa8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x97/0x6a0 lib/debugobjects.c:656 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1615 Comm: khungtaskd Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x202/0x31e lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xcfb/0xd40 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9744 Comm: kworker/u4:1 Not tainted 5.12.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy4 ieee80211_iface_work RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:177 [inline] RIP: 0010:kasan_check_range+0x8d/0x2f0 mm/kasan/generic.c:186 Code: ce 49 83 fe 10 7f 30 4d 85 f6 0f 84 ae 01 00 00 4c 89 cb 4c 29 d3 0f 1f 80 00 00 00 00 45 0f b6 19 45 84 db 0f 85 f3 01 00 00 <49> ff c1 48 ff c3 75 eb e9 87 01 00 00 44 89 cb 83 e3 07 0f 84 04 RSP: 0018:ffffc90009366f50 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff81611037 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90006d80 RBP: ffffc90009367310 R08: dffffc0000000000 R09: fffffbfff2000db0 R10: fffffbfff2000db1 R11: 0000000000000000 R12: 1ffffffff2000db0 R13: dffffc0000000001 R14: 0000000000000001 R15: ffff88802173c338 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9a0d0fb000 CR3: 000000000ca8e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] hlock_class kernel/locking/lockdep.c:199 [inline] __lock_acquire+0x1107/0x6040 kernel/locking/lockdep.c:4898 lock_acquire+0x17f/0x720 kernel/locking/lockdep.c:5512 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock include/linux/rcupdate.h:657 [inline] ieee80211_vif_get_shift+0x1d/0x210 net/mac80211/ieee80211_i.h:1055 ieee80211_sta_get_rates+0x114/0x6c0 net/mac80211/util.c:2080 ieee80211_update_sta_info net/mac80211/ibss.c:1010 [inline] ieee80211_rx_bss_info net/mac80211/ibss.c:1124 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1615 [inline] ieee80211_ibss_rx_queued_mgmt+0xe9d/0x2ac0 net/mac80211/ibss.c:1642 ieee80211_iface_work+0x71a/0xb10 net/mac80211/iface.c:1440 process_one_work+0x833/0x10c0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294