INFO: task syz-executor.0:6225 blocked for more than 143 seconds. Not tainted 6.8.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:26968 pid:6225 tgid:6179 ppid:5083 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 jfs_flush_journal+0x72b/0xec0 fs/jfs/jfs_logmgr.c:1564 jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:684 iterate_supers+0xc6/0x190 fs/super.c:927 ksys_sync+0xdb/0x1c0 fs/sync.c:104 __do_sys_sync+0xe/0x20 fs/sync.c:113 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f8f4967dda9 RSP: 002b:00007f8f4a3680c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f8f497ac1f0 RCX: 00007f8f4967dda9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f8f496ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f8f497ac1f0 R15: 00007ffcea38f818 INFO: task syz-executor.4:6229 blocked for more than 144 seconds. Not tainted 6.8.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27608 pid:6229 tgid:6188 ppid:5101 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x177f/0x49a0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178 __down_write_common+0x1ae/0x200 kernel/locking/rwsem.c:1306 do_remount fs/namespace.c:2889 [inline] path_mount+0xbe1/0xfa0 fs/namespace.c:3671 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7fa7bf67f4aa RSP: 002b:00007fa7c03b0ef8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa7c03b0f80 RCX: 00007fa7bf67f4aa RDX: 0000000020000180 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 0000000020000180 R08: 00007fa7c03b0f80 R09: 0000000001a404ac R10: 0000000001a404ac R11: 0000000000000206 R12: 0000000020000100 R13: 00007fa7c03b0f40 R14: 0000000000000000 R15: 00000000200001c0 Showing all locks held in the system: 1 lock held by pool_workqueue_/3: #0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995 3 locks held by kworker/0:1/9: #0: ffff8880b943c918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988 #2: ffff8880b94445d8 (&ACCESS_PRIVATE(sdp, lock)){....}-{2:2}, at: spin_lock_irq include/linux/spinlock.h:376 [inline] #2: ffff8880b94445d8 (&ACCESS_PRIVATE(sdp, lock)){....}-{2:2}, at: srcu_invoke_callbacks+0x35f/0x490 kernel/rcu/srcutree.c:1748 1 lock held by khungtaskd/29: #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e130ae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 3 locks held by kworker/u4:2/42: 2 locks held by getty/4819: #0: ffff88802b31d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.2/5095: #0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffffffff8e136478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x46c/0x890 kernel/rcu/tree_exp.h:995 2 locks held by kworker/1:4/5143: #0: ffff888014c8e938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff888014c8e938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc900048bfd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc900048bfd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 1 lock held by syz-executor.0/6225: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.4/6229: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: do_remount fs/namespace.c:2889 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: path_mount+0xbe1/0xfa0 fs/namespace.c:3671 1 lock held by syz-executor.1/6471: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6510: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6513: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6514: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.0/6644: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.0/6673: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.0/6674: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6748: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6801: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6804: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6805: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.0/6851: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.0/6853: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6955: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6992: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6993: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.1/6995: #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline] #0: ffff8880252860e0 (&type->s_umount_key#79){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120 1 lock held by syz-executor.0/7001: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 70 Comm: kworker/u4:5 Not tainted 6.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200 Code: 89 fb e8 23 00 00 00 48 8b 3d b4 5b 19 0c 48 89 de 5b e9 b3 7c 53 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0d 80 58 70 7e 65 8b 15 81 58 70 RSP: 0018:ffffc900015d7040 EFLAGS: 00000296 RAX: fffffffffffffff0 RBX: ffffc900015d7180 RCX: 0000000000000000 RDX: ffffc900015d71c0 RSI: ffffc900015d7bf0 RDI: ffffc900015d7180 RBP: ffffc900015d7180 R08: 0000000000000005 R09: ffffffff814066c0 R10: 0000000000000003 R11: ffff8880187c8000 R12: ffffc900015d7bf8 R13: dffffc0000000000 R14: ffffc900015d71c0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f327957efe0 CR3: 000000000df32000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deref_stack_reg+0x27/0x260 arch/x86/kernel/unwind_orc.c:402 unwind_next_frame+0x1ab9/0x29e0 arch/x86/kernel/unwind_orc.c:648 arch_stack_walk+0x150/0x1b0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x117/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:372 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:389 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3981 [inline] __kmalloc+0x22e/0x490 mm/slub.c:3994 kmalloc include/linux/slab.h:594 [inline] kzalloc include/linux/slab.h:711 [inline] ieee802_11_parse_elems_full+0xe7/0x2470 net/mac80211/util.c:1628 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2291 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2298 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline] ieee80211_ibss_rx_queued_mgmt+0x4b7/0x2cd0 net/mac80211/ibss.c:1604 ieee80211_iface_process_skb net/mac80211/iface.c:1589 [inline] ieee80211_iface_work+0x809/0xd90 net/mac80211/iface.c:1643 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:437 process_one_work kernel/workqueue.c:2633 [inline] process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787 kthread+0x2ef/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242