INFO: task syz-executor.3:16658 can't die for more than 143 seconds. task:syz-executor.3 state:D stack:26928 pid:16658 ppid: 8476 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4700 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5957 schedule+0xd3/0x270 kernel/sched/core.c:6036 perf_event_free_task+0x519/0x6c0 kernel/events/core.c:12775 copy_process+0x4b59/0x7510 kernel/fork.c:2437 kernel_clone+0xe7/0xac0 kernel/fork.c:2561 __do_sys_clone+0xc8/0x110 kernel/fork.c:2678 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f136e181188 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006cb2e100 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffce4e50f0f R14: 00007f136e181300 R15: 0000000000022000 INFO: task syz-executor.3:16658 blocked for more than 143 seconds. Not tainted 5.14.0-rc2-next-20210721-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26928 pid:16658 ppid: 8476 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4700 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5957 schedule+0xd3/0x270 kernel/sched/core.c:6036 perf_event_free_task+0x519/0x6c0 kernel/events/core.c:12775 copy_process+0x4b59/0x7510 kernel/fork.c:2437 kernel_clone+0xe7/0xac0 kernel/fork.c:2561 __do_sys_clone+0xc8/0x110 kernel/fork.c:2678 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f136e181188 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006cb2e100 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffce4e50f0f R14: 00007f136e181300 R15: 0000000000022000 Showing all locks held in the system: 5 locks held by kworker/u4:2/52: 4 locks held by kworker/u4:4/194: #0: ffff8880b9d519d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:460 [inline] #0: ffff8880b9d519d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1309 [inline] #0: ffff8880b9d519d8 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1612 [inline] #0: ffff8880b9d519d8 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x233/0x26f0 kernel/sched/core.c:5871 #1: ffff8880b9d1f988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39d/0x480 kernel/sched/psi.c:880 #2: ffff888055298d00 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1004 [inline] #2: ffff888055298d00 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x93/0xe80 net/mac80211/ibss.c:1683 #3: ffffffff8b97eb80 (rcu_read_lock){....}-{1:2}, at: sdata_assert_lock net/mac80211/ieee80211_i.h:1021 [inline] #3: ffffffff8b97eb80 (rcu_read_lock){....}-{1:2}, at: ieee80211_sta_active_ibss+0x86/0x350 net/mac80211/ibss.c:659 1 lock held by khungtaskd/1656: #0: ffffffff8b97eb80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/8165: #0: ffff8880181a19f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 3 locks held by kworker/u4:6/10542: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1656 Comm: khungtaskd Not tainted 5.14.0-rc2-next-20210721-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:254 [inline] watchdog+0xd3e/0xf50 kernel/hung_task.c:339 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4867 Comm: systemd-journal Not tainted 5.14.0-rc2-next-20210721-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x910/0x54a0 kernel/locking/lockdep.c:4988 Code: 0e 85 c9 0f 84 05 07 00 00 49 8d 85 e8 09 00 00 48 89 c2 48 89 44 24 68 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 73 37 00 00 8b 54 24 18 4d 8b bd e8 09 00 00 85 d2 0f 84 a3 RSP: 0018:ffffc9000131f800 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 00000000000000a4 RCX: ffffffff815ad5da RDX: 1ffff110029f04cd RSI: 0000000000000008 RDI: ffffffff8fcf18b0 RBP: ffff888014f8269a R08: 0000000000000000 R09: ffffffff8fcf18b7 R10: fffffbfff1f9e316 R11: 0000000000000000 R12: ffff888014f82678 R13: ffff888014f81c80 R14: 0000000000040000 R15: 0000000000000000 FS: 00007ff98c8778c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff989dcd000 CR3: 000000002e09f000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __fs_reclaim_acquire mm/page_alloc.c:4538 [inline] fs_reclaim_acquire+0x117/0x160 mm/page_alloc.c:4552 might_alloc include/linux/sched/mm.h:219 [inline] slab_pre_alloc_hook mm/slab.h:492 [inline] slab_alloc_node mm/slub.c:2879 [inline] slab_alloc mm/slub.c:2966 [inline] kmem_cache_alloc+0x3e/0x4a0 mm/slub.c:2971 kmem_cache_zalloc include/linux/slab.h:711 [inline] __alloc_file+0x21/0x280 fs/file_table.c:101 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 path_openat+0xde/0x27f0 fs/namei.c:3493 do_filp_open+0x1aa/0x400 fs/namei.c:3534 do_sys_openat2+0x16d/0x420 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_open fs/open.c:1228 [inline] __se_sys_open fs/open.c:1224 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1224 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff98be06840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffe8fd7a628 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffe8fd7a930 RCX: 00007ff98be06840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055d6823a3490 RBP: 000000000000000d R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055d682396040 R14: 00007ffe8fd7a8f0 R15: 000055d6823a32b0