======================================
| [ 13.310421][ C0] #1: ffff888009065710 (&sig->exec_update_lock){++++}-{4:4}, at: exec_mmap (fs/exec.c:964)
| [ 13.310763][ C0] #2: ffffffff89d74480 (rcu_callback){....}-{0:0}, at: rcu_do_batch (./include/linux/rcupdate.h:331 kernel/rcu/tree.c:2562)
| [ 13.311106][ C0]
| [ 13.311106][ C0] stack backtrace:
[ 13.311368][ C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.311371][ C0] Call Trace:
[ 13.311372][ C0]
[ 13.311374][ C0] dump_stack_lvl (lib/dump_stack.c:123)
[ 13.311382][ C0] print_usage_bug.part.0 (kernel/locking/lockdep.c:4046)
[ 13.311387][ C0] mark_lock_irq (kernel/locking/lockdep.c:4011 kernel/locking/lockdep.c:4057 kernel/locking/lockdep.c:4268)
[ 13.311391][ C0] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380)
[ 13.311396][ C0] ? validate_chain (kernel/locking/lockdep.c:3802 kernel/locking/lockdep.c:3822 kernel/locking/lockdep.c:3877)
[ 13.311398][ C0] ? __pfx_unwind_next_frame (arch/x86/kernel/unwind_orc.c:469)
[ 13.311405][ C0] mark_lock (kernel/locking/lockdep.c:4754)
[ 13.311408][ C0] mark_usage (kernel/locking/lockdep.c:4643)
[ 13.311411][ C0] __lock_acquire (kernel/locking/lockdep.c:5189)
[ 13.311415][ C0] lock_acquire.part.0 (kernel/locking/lockdep.c:472 kernel/locking/lockdep.c:5868)
[ 13.311418][ C0] ? simple_pin_fs (fs/libfs.c:1066)
[ 13.311421][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736)
[ 13.311425][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5829)
[ 13.311427][ C0] ? simple_pin_fs (fs/libfs.c:1066)
[ 13.311431][ C0] _raw_spin_lock (./include/linux/spinlock_api_smp.h:134 kernel/locking/spinlock.c:154)
[ 13.311435][ C0] ? simple_pin_fs (fs/libfs.c:1066)
[ 13.311437][ C0] simple_pin_fs (fs/libfs.c:1066)
[ 13.311440][ C0] debugfs_remove (fs/debugfs/inode.c:805 fs/debugfs/inode.c:799)
[ 13.311444][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195)
[ 13.311452][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253)
[ 13.311456][ C0] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333)
[ 13.311462][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568)
[ 13.311466][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189)
[ 13.311469][ C0] ? __local_bh_enable_ip (kernel/softirq.c:407)
[ 13.311472][ C0] ? flush_thread (./arch/x86/include/asm/cpufeature.h:101 ./arch/x86/include/asm/pkru.h:56 arch/x86/kernel/process.c:275 arch/x86/kernel/process.c:286)
[ 13.311475][ C0] ? begin_new_exec (fs/exec.c:1292)
[ 13.311478][ C0] ? load_elf_binary (fs/binfmt_elf.c:1002)
[ 13.311483][ C0] ? exec_binprm (fs/exec.c:1778 fs/exec.c:1810)
[ 13.311485][ C0] ? bprm_execve (fs/exec.c:1862 fs/exec.c:1838)
[ 13.311487][ C0] ? kernel_execve (fs/exec.c:2028)
[ 13.311490][ C0] ? call_usermodehelper_exec_async (kernel/umh.c:113)
[ 13.311497][ C0] ? ret_from_fork (arch/x86/kernel/process.c:153)
[ 13.311499][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258)
[ 13.311505][ C0] __put_net (net/core/net_namespace.c:732)
[ 13.311509][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333)
[ 13.311513][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568)
[ 13.311516][ C0] rcu_do_batch (kernel/rcu/tree.c:2568)
[ 13.311521][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492)
[ 13.311525][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4326)
[ 13.311528][ C0] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1))
[ 13.311531][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473)
[ 13.311537][ C0] rcu_core (kernel/rcu/tree.c:2826)
[ 13.311541][ C0] handle_softirqs (kernel/softirq.c:579)
[ 13.311545][ C0] ? fpu_flush_thread (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/core.c:742 arch/x86/kernel/fpu/core.c:786)
[ 13.311550][ C0] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467)
[ 13.311552][ C0]
[ 13.311553][ C0]
[ 13.311555][ C0] __local_bh_enable_ip (kernel/softirq.c:407)
[ 13.311558][ C0] flush_thread (./arch/x86/include/asm/cpufeature.h:101 ./arch/x86/include/asm/pkru.h:56 arch/x86/kernel/process.c:275 arch/x86/kernel/process.c:286)
[ 13.311560][ C0] begin_new_exec (fs/exec.c:1292)
[ 13.311565][ C0] load_elf_binary (fs/binfmt_elf.c:1002)
[ 13.311570][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5235)
[ 13.311574][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348)
[ 13.311580][ C0] ? __pfx_load_elf_binary (fs/binfmt_elf.c:825)
[ 13.311583][ C0] ? exec_binprm (fs/exec.c:1778 fs/exec.c:1810)
[ 13.311588][ C0] exec_binprm (fs/exec.c:1778 fs/exec.c:1810)
[ 13.311592][ C0] ? __pfx_exec_binprm (fs/exec.c:1794)
[ 13.311594][ C0] ? bprm_execve (fs/exec.c:1852 fs/exec.c:1838)
[ 13.311599][ C0] bprm_execve (fs/exec.c:1862 fs/exec.c:1838)
[ 13.311602][ C0] kernel_execve (fs/exec.c:2028)
[ 13.311606][ C0] call_usermodehelper_exec_async (kernel/umh.c:113)
[ 13.311609][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473)
[ 13.311613][ C0] ? __pfx_call_usermodehelper_exec_async (kernel/umh.c:64)
[ 13.311616][ C0] ? __pfx_call_usermodehelper_exec_async (kernel/umh.c:64)
[ 13.311620][ C0] ret_from_fork (arch/x86/kernel/process.c:153)
[ 13.311622][ C0] ? __pfx_call_usermodehelper_exec_async (kernel/umh.c:64)
[ 13.311626][ C0] ret_from_fork_asm (arch/x86/entry/entry_64.S:258)
| [ 13.326759][ C0] RCU nest depth: 0, expected: 0
| [ 13.327073][ C0] INFO: lockdep is turned off.
| [ 13.327362][ C0] Preemption disabled at:
| [ 13.327365][ C0] fpu_flush_thread (arch/x86/kernel/fpu/context.h:33 arch/x86/kernel/fpu/core.c:726 arch/x86/kernel/fpu/core.c:786)
[ 13.327959][ C0] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.327962][ C0] Call Trace:
[ 13.327965][ C0]
[ 13.327969][ C0] dump_stack_lvl (lib/dump_stack.c:123)
[ 13.327978][ C0] __might_resched (kernel/sched/core.c:8819)
[ 13.327989][ C0] down_write (./include/linux/kernel.h:73 kernel/locking/rwsem.c:1576)
[ 13.327995][ C0] ? __pfx_down_write (kernel/locking/rwsem.c:1575)
[ 13.327999][ C0] ? simple_recursive_removal (./include/linux/dcache.h:345 fs/libfs.c:610)
[ 13.328006][ C0] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:736)
[ 13.328013][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[ 13.328020][ C0] simple_recursive_removal (./include/linux/dcache.h:409 ./include/linux/dcache.h:424 ./include/linux/dcache.h:434 fs/libfs.c:616)
[ 13.328025][ C0] ? __pfx_remove_one (fs/debugfs/inode.c:780)
[ 13.328032][ C0] ? do_raw_spin_unlock (./arch/x86/include/asm/atomic.h:23 ./include/linux/atomic/atomic-arch-fallback.h:457 ./include/linux/atomic/atomic-instrumented.h:33 ./include/asm-generic/qspinlock.h:57 kernel/locking/spinlock_debug.c:101 kernel/locking/spinlock_debug.c:141)
[ 13.328040][ C0] debugfs_remove (fs/debugfs/inode.c:806 fs/debugfs/inode.c:799)
[ 13.328045][ C0] ref_tracker_dir_exit (lib/ref_tracker.c:423 lib/ref_tracker.c:195)
[ 13.328053][ C0] ? __pfx_ref_tracker_free (lib/ref_tracker.c:253)
[ 13.328058][ C0] ? __sk_destruct (./include/linux/instrumented.h:96 ./include/linux/atomic/atomic-instrumented.h:400 ./include/linux/refcount.h:389 ./include/linux/refcount.h:432 ./include/linux/refcount.h:450 ./include/net/net_namespace.h:287 ./include/net/net_namespace.h:390 net/core/sock.c:2333)
[ 13.328065][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568)
[ 13.328072][ C0] ? __pfx_ref_tracker_dir_exit (lib/ref_tracker.c:189)
[ 13.328077][ C0] ? __local_bh_enable_ip (kernel/softirq.c:407)
[ 13.328083][ C0] ? flush_thread (./arch/x86/include/asm/cpufeature.h:101 ./arch/x86/include/asm/pkru.h:56 arch/x86/kernel/process.c:275 arch/x86/kernel/process.c:286)
[ 13.328087][ C0] ? begin_new_exec (fs/exec.c:1292)
[ 13.328093][ C0] ? load_elf_binary (fs/binfmt_elf.c:1002)
[ 13.328098][ C0] ? exec_binprm (fs/exec.c:1778 fs/exec.c:1810)
[ 13.328102][ C0] ? bprm_execve (fs/exec.c:1862 fs/exec.c:1838)
[ 13.328106][ C0] ? kernel_execve (fs/exec.c:2028)
[ 13.328110][ C0] ? call_usermodehelper_exec_async (kernel/umh.c:113)
[ 13.328118][ C0] ? ret_from_fork (arch/x86/kernel/process.c:153)
[ 13.328122][ C0] ? ret_from_fork_asm (arch/x86/entry/entry_64.S:258)
[ 13.328132][ C0] __put_net (net/core/net_namespace.c:732)
[ 13.328137][ C0] __sk_destruct (./include/net/net_namespace.h:288 ./include/net/net_namespace.h:390 net/core/sock.c:2333)
[ 13.328144][ C0] ? rcu_do_batch (kernel/rcu/tree.c:2568)
[ 13.328148][ C0] rcu_do_batch (kernel/rcu/tree.c:2568)
[ 13.328158][ C0] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2492)
[ 13.328165][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4326)
[ 13.328170][ C0] ? note_gp_changes (kernel/rcu/tree.c:1324 (discriminator 1))
[ 13.328175][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473)
[ 13.328184][ C0] rcu_core (kernel/rcu/tree.c:2826)
[ 13.328190][ C0] handle_softirqs (kernel/softirq.c:579)
[ 13.328197][ C0] ? fpu_flush_thread (./include/linux/bottom_half.h:33 ./arch/x86/include/asm/fpu/api.h:77 arch/x86/kernel/fpu/core.c:742 arch/x86/kernel/fpu/core.c:786)
[ 13.328203][ C0] do_softirq (kernel/softirq.c:480 kernel/softirq.c:467)
[ 13.328208][ C0]
[ 13.328210][ C0]
[ 13.328212][ C0] __local_bh_enable_ip (kernel/softirq.c:407)
[ 13.328218][ C0] flush_thread (./arch/x86/include/asm/cpufeature.h:101 ./arch/x86/include/asm/pkru.h:56 arch/x86/kernel/process.c:275 arch/x86/kernel/process.c:286)
[ 13.328222][ C0] begin_new_exec (fs/exec.c:1292)
[ 13.328231][ C0] load_elf_binary (fs/binfmt_elf.c:1002)
[ 13.328240][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5235)
[ 13.328249][ C0] ? find_held_lock (kernel/locking/lockdep.c:5348)
[ 13.328255][ C0] ? __pfx_load_elf_binary (fs/binfmt_elf.c:825)
[ 13.328260][ C0] ? exec_binprm (fs/exec.c:1778 fs/exec.c:1810)
[ 13.328269][ C0] exec_binprm (fs/exec.c:1778 fs/exec.c:1810)
[ 13.328277][ C0] ? __pfx_exec_binprm (fs/exec.c:1794)
[ 13.328281][ C0] ? bprm_execve (fs/exec.c:1852 fs/exec.c:1838)
[ 13.328290][ C0] bprm_execve (fs/exec.c:1862 fs/exec.c:1838)
[ 13.328296][ C0] kernel_execve (fs/exec.c:2028)
[ 13.328303][ C0] call_usermodehelper_exec_async (kernel/umh.c:113)
[ 13.328308][ C0] ? lockdep_hardirqs_on (kernel/locking/lockdep.c:4473)
[ 13.328313][ C0] ? __pfx_call_usermodehelper_exec_async (kernel/umh.c:64)
[ 13.328319][ C0] ? __pfx_call_usermodehelper_exec_async (kernel/umh.c:64)
[ 13.328325][ C0] ret_from_fork (arch/x86/kernel/process.c:153)
[ 13.328329][ C0] ? __pfx_call_usermodehelper_exec_async (kernel/umh.c:64)
Finger prints:
mark_lock_irq:mark_lock:mark_usage:__lock_acquire:_raw_spin_lock
fpu_flush_thread:dump_stack_lvl:__might_resched:down_write:simple_recursive_removal