Warning: Permanently added '10.128.0.127' (ED25519) to the list of known hosts. executing program [ 54.078062][ T5077] [ 54.080432][ T5077] ============================================ [ 54.086559][ T5077] WARNING: possible recursive locking detected [ 54.092682][ T5077] 6.9.0-rc5-syzkaller-01160-g2bd87951de65 #0 Not tainted [ 54.099675][ T5077] -------------------------------------------- [ 54.105795][ T5077] syz-executor326/5077 is trying to acquire lock: [ 54.112178][ T5077] ffff88807840d1f8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x96/0x6a0 [ 54.121042][ T5077] [ 54.121042][ T5077] but task is already holding lock: [ 54.128379][ T5077] ffff88807840d9f8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x96/0x6a0 [ 54.137237][ T5077] [ 54.137237][ T5077] other info that might help us debug this: [ 54.145304][ T5077] Possible unsafe locking scenario: [ 54.145304][ T5077] [ 54.152742][ T5077] CPU0 [ 54.156004][ T5077] ---- [ 54.159264][ T5077] lock(&trie->lock); [ 54.163316][ T5077] lock(&trie->lock); [ 54.167362][ T5077] [ 54.167362][ T5077] *** DEADLOCK *** [ 54.167362][ T5077] [ 54.175482][ T5077] May be due to missing lock nesting notation [ 54.175482][ T5077] [ 54.183773][ T5077] 10 locks held by syz-executor326/5077: [ 54.189380][ T5077] #0: ffff88802b6f1ec8 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x2f9/0x730 [ 54.199646][ T5077] #1: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: __handle_mm_fault+0x3048/0x7240 [ 54.209466][ T5077] #2: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: filemap_map_pages+0x23f/0x1830 [ 54.219199][ T5077] #3: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x82/0x380 [ 54.228666][ T5077] #4: ffff888023311498 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: __pte_offset_map_lock+0x1ba/0x300 [ 54.239259][ T5077] #5: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x530 [ 54.248640][ T5077] #6: ffff88807840d9f8 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x96/0x6a0 [ 54.257923][ T5077] #7: ffff8880b9429430 (krc.lock){....}-{2:2}, at: kvfree_call_rcu+0x18a/0x790 [ 54.266958][ T5077] #8: ffff8880b942a718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x112/0x240 [ 54.276251][ T5077] #9: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run2+0x1fc/0x530 [ 54.285623][ T5077] [ 54.285623][ T5077] stack backtrace: [ 54.291500][ T5077] CPU: 0 PID: 5077 Comm: syz-executor326 Not tainted 6.9.0-rc5-syzkaller-01160-g2bd87951de65 #0 [ 54.301896][ T5077] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 54.311940][ T5077] Call Trace: [ 54.315213][ T5077] [ 54.318142][ T5077] dump_stack_lvl+0x241/0x360 [ 54.322813][ T5077] ? __pfx_dump_stack_lvl+0x10/0x10 [ 54.328001][ T5077] ? print_deadlock_bug+0x479/0x620 [ 54.333180][ T5077] ? _find_first_zero_bit+0xd4/0x100 [ 54.338455][ T5077] validate_chain+0x15c1/0x58e0 [ 54.343290][ T5077] ? validate_chain+0x15a2/0x58e0 [ 54.348295][ T5077] ? __pfx_validate_chain+0x10/0x10 [ 54.353475][ T5077] ? look_up_lock_class+0x77/0x160 [ 54.358563][ T5077] ? register_lock_class+0x102/0x980 [ 54.363838][ T5077] ? __pfx_register_lock_class+0x10/0x10 [ 54.369447][ T5077] ? mark_lock+0x9a/0x350 [ 54.373755][ T5077] __lock_acquire+0x1346/0x1fd0 [ 54.378586][ T5077] lock_acquire+0x1ed/0x550 [ 54.383063][ T5077] ? trie_delete_elem+0x96/0x6a0 [ 54.387990][ T5077] ? __pfx_lock_acquire+0x10/0x10 [ 54.392993][ T5077] ? __lock_acquire+0x1346/0x1fd0 [ 54.397998][ T5077] _raw_spin_lock_irqsave+0xd5/0x120 [ 54.403278][ T5077] ? trie_delete_elem+0x96/0x6a0 [ 54.408198][ T5077] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 54.414069][ T5077] ? __pfx_lock_acquire+0x10/0x10 [ 54.419072][ T5077] ? bpf_trace_run2+0x1fc/0x530 [ 54.423902][ T5077] trie_delete_elem+0x96/0x6a0 [ 54.428646][ T5077] ? __pfx___cant_migrate+0x10/0x10 [ 54.433822][ T5077] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 54.439696][ T5077] ? bpf_trace_run2+0x1fc/0x530 [ 54.444524][ T5077] bpf_prog_2c29ac5cdc6b1842+0x42/0x46 [ 54.449972][ T5077] bpf_trace_run2+0x2ec/0x530 [ 54.454633][ T5077] ? __pfx_bpf_trace_run2+0x10/0x10 [ 54.459812][ T5077] ? __pfx_debug_object_activate+0x10/0x10 [ 54.465610][ T5077] enqueue_timer+0x3ce/0x570 [ 54.470183][ T5077] __mod_timer+0xa0e/0xeb0 [ 54.474580][ T5077] ? __pfx___mod_timer+0x10/0x10 [ 54.479497][ T5077] ? __queue_delayed_work+0x1ae/0x250 [ 54.484848][ T5077] queue_delayed_work_on+0x15a/0x260 [ 54.490121][ T5077] ? __pfx_queue_delayed_work_on+0x10/0x10 [ 54.495906][ T5077] ? __pfx_llist_del_first+0x10/0x10 [ 54.501170][ T5077] kvfree_call_rcu+0x47f/0x790 [ 54.505916][ T5077] ? __pfx_kvfree_call_rcu+0x10/0x10 [ 54.511178][ T5077] ? longest_prefix_match+0x4b8/0x670 [ 54.516534][ T5077] trie_delete_elem+0x52c/0x6a0 [ 54.521366][ T5077] ? bpf_trace_run2+0x1fc/0x530 [ 54.526199][ T5077] bpf_prog_2c29ac5cdc6b1842+0x42/0x46 [ 54.531636][ T5077] bpf_trace_run2+0x2ec/0x530 [ 54.536308][ T5077] ? __pfx_bpf_trace_run2+0x10/0x10 [ 54.541485][ T5077] ? __pfx_percpu_counter_add_batch+0x10/0x10 [ 54.547531][ T5077] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 54.552887][ T5077] mm_trace_rss_stat+0x1b9/0x220 [ 54.557814][ T5077] set_pte_range+0x478/0xa80 [ 54.562384][ T5077] ? __pfx_set_pte_range+0x10/0x10 [ 54.567475][ T5077] ? next_uptodate_folio+0xa61/0xb10 [ 54.572754][ T5077] filemap_map_pages+0xee2/0x1830 [ 54.577781][ T5077] ? filemap_map_pages+0x23f/0x1830 [ 54.582987][ T5077] ? __pfx_filemap_map_pages+0x10/0x10 [ 54.588460][ T5077] ? __handle_mm_fault+0x1be5/0x7240 [ 54.593751][ T5077] ? __pfx_lock_release+0x10/0x10 [ 54.598767][ T5077] ? pte_offset_map_nolock+0x137/0x1f0 [ 54.604239][ T5077] ? __pfx_filemap_map_pages+0x10/0x10 [ 54.609702][ T5077] ? __handle_mm_fault+0x3048/0x7240 [ 54.615005][ T5077] __handle_mm_fault+0x446e/0x7240 [ 54.620104][ T5077] ? mark_lock+0x9a/0x350 [ 54.624420][ T5077] ? lock_vma_under_rcu+0x2f9/0x730 [ 54.629629][ T5077] ? __pfx___handle_mm_fault+0x10/0x10 [ 54.635085][ T5077] ? __pfx_reacquire_held_locks+0x10/0x10 [ 54.640794][ T5077] ? mtree_range_walk+0x6fd/0x8e0 [ 54.645808][ T5077] ? lock_vma_under_rcu+0x18a/0x730 [ 54.650990][ T5077] ? __pfx_lock_release+0x10/0x10 [ 54.655992][ T5077] ? lock_vma_under_rcu+0x2f9/0x730 [ 54.661170][ T5077] ? lock_vma_under_rcu+0x18a/0x730 [ 54.666348][ T5077] ? __pfx_lock_vma_under_rcu+0x10/0x10 [ 54.671890][ T5077] handle_mm_fault+0x3c2/0x8a0 [ 54.676654][ T5077] exc_page_fault+0x446/0x8e0 [ 54.681326][ T5077] asm_exc_page_fault+0x26/0x30 [ 54.686169][ T5077] RIP: 0033:0x7fd408de05b8 [ 54.690571][ T5077] Code: Unable to access opcode bytes at 0x7fd408de058e. [ 54.697575][ T5077] RSP: 002b:00007fffb40921a8 EFLAGS: 00010202 [ 54.703638][ T5077] RAX: 00007fd408e10af8 RBX: 0000000000000000 RCX: 0000000000000004 [ 54.711607][ T5077] RDX: 00007fd408e11d20 RSI: 0000000000000000 RDI: 00007fd408e10af8 [ 54.719579][ T5077] RBP: 00007fd408e0f138 R08: 0000000000000006 R09: 0000000000000006 executing program executing program [ 54.727534][ T5077] R10: 0000000000000006 R11: 0000000000000246 R12: 00007fd408e11d08 [ 54.735488][ T5077] R13: 0000000000000000 R14: 00007fd408e11d20 R15: 00007fd408d67580 [ 54.743447][ T5077] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program