INFO: task syz-executor.1:7137 blocked for more than 143 seconds. Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27296 pid:7137 tgid:7131 ppid:6994 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0xf15/0x5c70 kernel/sched/core.c:6736 __schedule_loop kernel/sched/core.c:6813 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6828 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752 __do_sys_acct kernel/acct.c:304 [inline] __se_sys_acct kernel/acct.c:292 [inline] __x64_sys_acct+0xa5/0x220 kernel/acct.c:292 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f699467de69 RSP: 002b:00007f69954360c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a3 RAX: ffffffffffffffda RBX: 00007f69947ac050 RCX: 00007f699467de69 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100 RBP: 00007f69946ca47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f69947ac050 R15: 00007ffc065c5818 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614 2 locks held by kworker/u8:3/50: 2 locks held by getty/4824: #0: ffff88802a5360a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201 3 locks held by syz-executor.3/6878: 1 lock held by syz-executor.1/7137: #0: ffffffff8d7f5ec8 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:304 [inline] #0: ffffffff8d7f5ec8 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:292 [inline] #0: ffffffff8d7f5ec8 (acct_on_mutex){+.+.}-{3:3}, at: __x64_sys_acct+0xa5/0x220 kernel/acct.c:292 1 lock held by syz-executor.4/7448: #0: ffffffff8d7f5ec8 (acct_on_mutex){+.+.}-{3:3}, at: __do_sys_acct kernel/acct.c:304 [inline] #0: ffffffff8d7f5ec8 (acct_on_mutex){+.+.}-{3:3}, at: __se_sys_acct kernel/acct.c:292 [inline] #0: ffffffff8d7f5ec8 (acct_on_mutex){+.+.}-{3:3}, at: __x64_sys_acct+0xa5/0x220 kernel/acct.c:292 3 locks held by syz-executor.4/8084: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 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+0xf86/0x1210 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 50 Comm: kworker/u8:3 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3763 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3782 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:3837 [inline] RIP: 0010:__lock_acquire+0x1572/0x3b30 kernel/locking/lockdep.c:5137 Code: e5 e0 f0 c8 93 48 8d 43 f8 48 85 db 48 0f 45 d8 eb 04 48 83 eb 08 48 85 db 74 40 48 8d 7b 18 48 89 f8 48 c1 e8 03 80 3c 28 00 <0f> 85 bc 18 00 00 48 8b 43 18 49 39 c5 0f 84 a2 f7 ff ff 48 8d 7b RSP: 0018:ffffc90000ba7978 EFLAGS: 00000046 RAX: 1ffffffff25a43bb RBX: ffffffff92d21dc0 RCX: ffffffff816a5d5e RDX: 1ffffffff279a9cf RSI: 0000000000000008 RDI: ffffffff92d21dd8 RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff27b4e3e R10: ffffffff93da71f7 R11: 0000000000000003 R12: 0000000000008bb3 R13: 97965d5370c442f7 R14: ffff88801caa8b50 R15: 0000000000000003 FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4c2de76866 CR3: 000000000d57a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x540 kernel/locking/lockdep.c:5719 local_lock_acquire include/linux/local_lock_internal.h:29 [inline] kcov_remote_stop+0x78/0x5e0 kernel/kcov.c:995 ieee80211_iface_work+0x43a/0xf00 net/mac80211/iface.c:1662 cfg80211_wiphy_work+0x255/0x330 net/wireless/core.c:437 process_one_work+0x9a9/0x1a60 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243