====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc7-syzkaller-01770-gdd7207838d38 #0 Not tainted ------------------------------------------------------ syz.3.560/7870 is trying to acquire lock: ffff88813fffc298 (&zone->lock){-.-.}-{2:2}, at: rmqueue_buddy mm/page_alloc.c:2907 [inline] ffff88813fffc298 (&zone->lock){-.-.}-{2:2}, at: rmqueue mm/page_alloc.c:3080 [inline] ffff88813fffc298 (&zone->lock){-.-.}-{2:2}, at: get_page_from_freelist+0xb3d/0x3790 mm/page_alloc.c:3471 but task is already holding lock: ffff88805fe87200 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc8/0xc00 kernel/bpf/lpm_trie.c:333 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&trie->lock){..-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:462 bpf_prog_67a7f92a6a5e5f13+0x3e/0x47 bpf_dispatcher_nop_func include/linux/bpf.h:1265 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2316 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2357 trace_contention_begin+0x117/0x140 include/trace/events/lock.h:95 __pv_queued_spin_lock_slowpath+0x114/0xdb0 kernel/locking/qspinlock.c:402 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:584 [inline] queued_spin_lock_slowpath+0x42/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x272/0x370 kernel/locking/spinlock_debug.c:116 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162 rmqueue_bulk mm/page_alloc.c:2307 [inline] __rmqueue_pcplist+0x4a2/0x2a80 mm/page_alloc.c:3001 rmqueue_pcplist mm/page_alloc.c:3043 [inline] rmqueue mm/page_alloc.c:3074 [inline] get_page_from_freelist+0x886/0x3790 mm/page_alloc.c:3471 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4750 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 vm_area_alloc_pages mm/vmalloc.c:3568 [inline] __vmalloc_area_node mm/vmalloc.c:3646 [inline] __vmalloc_node_range_noprof+0xa2b/0x13f0 mm/vmalloc.c:3828 alloc_thread_stack_node kernel/fork.c:315 [inline] dup_task_struct+0x444/0x8c0 kernel/fork.c:1116 copy_process+0x5d1/0x3d50 kernel/fork.c:2204 kernel_clone+0x226/0x8f0 kernel/fork.c:2786 __do_sys_clone3 kernel/fork.c:3090 [inline] __se_sys_clone3+0x2d8/0x360 kernel/fork.c:3069 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&zone->lock){-.-.}-{2:2}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 rmqueue_buddy mm/page_alloc.c:2907 [inline] rmqueue mm/page_alloc.c:3080 [inline] get_page_from_freelist+0xb3d/0x3790 mm/page_alloc.c:3471 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4750 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] ___kmalloc_large_node+0x8b/0x1d0 mm/slub.c:4209 __kmalloc_large_node_noprof+0x1a/0x80 mm/slub.c:4236 __do_kmalloc_node mm/slub.c:4252 [inline] __kmalloc_node_noprof+0x2d2/0x440 mm/slub.c:4270 kmalloc_node_noprof include/linux/slab.h:905 [inline] bpf_map_kmalloc_node+0xd3/0x1c0 kernel/bpf/syscall.c:422 lpm_trie_node_alloc kernel/bpf/lpm_trie.c:299 [inline] trie_update_elem+0x1cd/0xc00 kernel/bpf/lpm_trie.c:342 bpf_map_update_value+0x4d3/0x540 kernel/bpf/syscall.c:203 map_update_elem+0x51a/0x6f0 kernel/bpf/syscall.c:1626 __sys_bpf+0x76f/0x810 kernel/bpf/syscall.c:5641 __do_sys_bpf kernel/bpf/syscall.c:5760 [inline] __se_sys_bpf kernel/bpf/syscall.c:5758 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5758 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&trie->lock); lock(&zone->lock); lock(&trie->lock); lock(&zone->lock); *** DEADLOCK *** 2 locks held by syz.3.560/7870: #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: bpf_map_update_value+0x3c4/0x540 kernel/bpf/syscall.c:202 #1: ffff88805fe87200 (&trie->lock){..-.}-{2:2}, at: trie_update_elem+0xc8/0xc00 kernel/bpf/lpm_trie.c:333 stack backtrace: CPU: 1 UID: 0 PID: 7870 Comm: syz.3.560 Not tainted 6.12.0-rc7-syzkaller-01770-gdd7207838d38 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 rmqueue_buddy mm/page_alloc.c:2907 [inline] rmqueue mm/page_alloc.c:3080 [inline] get_page_from_freelist+0xb3d/0x3790 mm/page_alloc.c:3471 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4750 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] ___kmalloc_large_node+0x8b/0x1d0 mm/slub.c:4209 __kmalloc_large_node_noprof+0x1a/0x80 mm/slub.c:4236 __do_kmalloc_node mm/slub.c:4252 [inline] __kmalloc_node_noprof+0x2d2/0x440 mm/slub.c:4270 kmalloc_node_noprof include/linux/slab.h:905 [inline] bpf_map_kmalloc_node+0xd3/0x1c0 kernel/bpf/syscall.c:422 lpm_trie_node_alloc kernel/bpf/lpm_trie.c:299 [inline] trie_update_elem+0x1cd/0xc00 kernel/bpf/lpm_trie.c:342 bpf_map_update_value+0x4d3/0x540 kernel/bpf/syscall.c:203 map_update_elem+0x51a/0x6f0 kernel/bpf/syscall.c:1626 __sys_bpf+0x76f/0x810 kernel/bpf/syscall.c:5641 __do_sys_bpf kernel/bpf/syscall.c:5760 [inline] __se_sys_bpf kernel/bpf/syscall.c:5758 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5758 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f692457e819 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f69252ce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6924735fa0 RCX: 00007f692457e819 RDX: 0000000000000020 RSI: 0000000020000000 RDI: 0000000000000002 RBP: 00007f69245f175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6924735fa0 R15: 00007ffec6891a08 netlink: 80 bytes leftover after parsing attributes in process `syz.3.560'.