INFO: task syz-executor.3:5035 blocked for more than 143 seconds. Not tainted 6.4.0-syzkaller-01312-gb19edac5992d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:20728 pid:5035 ppid:1 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x187b/0x4900 kernel/sched/core.c:6669 schedule+0xc3/0x180 kernel/sched/core.c:6745 schedule_timeout+0x1bd/0x310 kernel/time/timer.c:2167 gfs2_gl_hash_clear+0x1a3/0x310 fs/gfs2/glock.c:2198 gfs2_put_super+0x827/0x890 fs/gfs2/super.c:642 generic_shutdown_super+0x134/0x340 fs/super.c:500 kill_block_super+0x68/0xa0 fs/super.c:1418 deactivate_locked_super+0xa4/0x110 fs/super.c:331 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254 task_work_run+0x24a/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f613268d7f7 RSP: 002b:00007ffe590de1e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f613268d7f7 RDX: 00007ffe590de2bb RSI: 000000000000000a RDI: 00007ffe590de2b0 RBP: 00007ffe590de2b0 R08: 00000000ffffffff R09: 00007ffe590de080 R10: 0000555555fd2893 R11: 0000000000000246 R12: 00007f61326d643b R13: 00007ffe590df370 R14: 0000555555fd2810 R15: 00007ffe590df3b0 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8cf27530 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522 1 lock held by rcu_tasks_trace/14: #0: ffffffff8cf278f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522 1 lock held by khungtaskd/28: #0: ffffffff8cf27360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by klogd/4436: 2 locks held by getty/4747: #0: ffff88802cc48098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1db0 drivers/tty/n_tty.c:2176 1 lock held by syz-executor.3/5035: #0: ffff88802c80e0e0 (&type->s_umount_key#100){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.4.0-syzkaller-01312-gb19edac5992d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x187/0x300 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+0xec2/0xf00 kernel/hung_task.c:379 kthread+0x2b8/0x350 kernel/kthread.c:379 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: 42 Comm: kworker/u4:3 Not tainted 6.4.0-syzkaller-01312-gb19edac5992d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Workqueue: phy9 ieee80211_iface_work RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:84 [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:178 [inline] RIP: 0010:kasan_check_range+0x75/0x290 mm/kasan/generic.c:187 Code: 54 37 ff 49 c1 ea 03 49 bb 01 00 00 00 00 fc ff df 4f 8d 34 1a 4c 89 f5 4c 29 cd 48 83 fd 10 7f 26 48 85 ed 0f 84 3a 01 00 00 <49> f7 d2 49 01 da 41 80 39 00 0f 85 c4 01 00 00 49 ff c1 49 ff c2 RSP: 0018:ffffc90000b36c80 EFLAGS: 00000002 RAX: 0000000000000001 RBX: 1ffffffff206764c RCX: ffffffff816b1eb2 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9033b260 RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff206764c R10: 1ffffffff206764c R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff110028d7155 R14: fffffbfff206764d R15: ffff8880146b8b88 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0000fae08 CR3: 0000000029bab000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class kernel/locking/lockdep.c:228 [inline] check_wait_context kernel/locking/lockdep.c:4751 [inline] __lock_acquire+0x4b2/0x2070 kernel/locking/lockdep.c:5038 lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5705 debug_objects_fill_pool+0xa0/0x990 lib/debugobjects.c:614 debug_object_activate+0x12b/0x530 lib/debugobjects.c:713 debug_rcu_head_queue kernel/rcu/rcu.h:226 [inline] kvfree_call_rcu+0x99/0x790 kernel/rcu/tree.c:3359 cfg80211_update_known_bss+0x166/0x9e0 cfg80211_bss_update+0x171/0x20d0 net/wireless/scan.c:1732 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2482 [inline] cfg80211_inform_bss_frame_data+0xc5b/0x22c0 net/wireless/scan.c:2515 ieee80211_bss_info_update+0x801/0xf00 net/mac80211/scan.c:190 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+0x192f/0x2cf0 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline] ieee80211_iface_work+0x7bd/0xd00 net/mac80211/iface.c:1648 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2408 worker_thread+0xa63/0x1210 kernel/workqueue.c:2555 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308