================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.0.5699/23250 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff88805f1e3a38 (&trie->lock){..-.}-{2:2}, at: trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:467 {INITIAL USE} state was registered at: lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb4/0x100 kernel/locking/spinlock.c:162 trie_update_elem+0xcd/0xea0 kernel/bpf/lpm_trie.c:335 bpf_map_update_value+0x660/0x720 kernel/bpf/syscall.c:203 generic_map_update_batch+0x5ec/0x810 kernel/bpf/syscall.c:1800 bpf_map_do_batch+0x3d7/0x610 kernel/bpf/syscall.c:5010 __sys_bpf+0x381/0x890 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:5581 [inline] __se_sys_bpf kernel/bpf/syscall.c:5579 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 irq event stamp: 1586 hardirqs last enabled at (1585): [] ___slab_alloc+0x10ef/0x12f0 mm/slub.c:3187 hardirqs last disabled at (1586): [] exc_debug_kernel arch/x86/kernel/traps.c:1063 [inline] hardirqs last disabled at (1586): [] exc_debug+0x73/0x140 arch/x86/kernel/traps.c:1199 softirqs last enabled at (1418): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last enabled at (1418): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last enabled at (1418): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 softirqs last disabled at (1377): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last disabled at (1377): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last disabled at (1377): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&trie->lock); lock(&trie->lock); *** DEADLOCK *** no locks held by syz.0.5699/23250. stack backtrace: CPU: 1 PID: 23250 Comm: syz.0.5699 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: <#DB> dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106 lock_acquire+0x2c2/0x420 kernel/locking/lockdep.c:5745 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb4/0x100 kernel/locking/spinlock.c:162 trie_delete_elem+0x96/0x6a0 kernel/bpf/lpm_trie.c:467 bpf_prog_2c29ac5cdc6b1842+0x42/0x46 bpf_dispatcher_nop_func include/linux/bpf.h:1224 [inline] __bpf_prog_run include/linux/filter.h:616 [inline] bpf_prog_run include/linux/filter.h:623 [inline] bpf_overflow_handler+0x1fc/0x510 kernel/events/core.c:10584 __perf_event_overflow+0x447/0x630 kernel/events/core.c:9720 perf_swevent_overflow kernel/events/core.c:9803 [inline] perf_swevent_event+0x319/0x570 kernel/events/core.c:9854 perf_bp_event+0x319/0x430 kernel/events/core.c:10781 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x23e/0x670 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain+0x197/0x380 kernel/notifier.c:93 atomic_notifier_call_chain+0xda/0x180 kernel/notifier.c:231 notify_die+0x145/0x1a0 kernel/notifier.c:596 notify_debug+0x2e/0x50 arch/x86/kernel/traps.c:1042 exc_debug_kernel arch/x86/kernel/traps.c:1099 [inline] exc_debug+0xde/0x140 arch/x86/kernel/traps.c:1199 asm_exc_debug+0x1e/0x40 arch/x86/include/asm/idtentry.h:644 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:71 Code: 75 f1 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 RSP: 0018:ffffc90004d17b48 EFLAGS: 00050202 RAX: ffffffff842a1f01 RBX: 0000000000000dc0 RCX: 0000000000000dbf RDX: 0000000000000001 RSI: 0000200000000301 RDI: ffff88802f08a101 RBP: 0000000000000100 R08: ffff88802f08aebf R09: 1ffff11005e115d7 R10: dffffc0000000000 R11: ffffed1005e115d8 R12: 00002000000010c0 R13: 0000000000000dc0 R14: ffff88802f08a100 R15: 0000200000000300 copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:127 [inline] _copy_from_user+0x8b/0xe0 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:183 [inline] bpf_test_init+0xde/0x140 net/bpf/test_run.c:641 bpf_prog_test_run_xdp+0x4d1/0x10e0 net/bpf/test_run.c:1224 bpf_prog_test_run+0x321/0x390 kernel/bpf/syscall.c:4132 __sys_bpf+0x49d/0x890 kernel/bpf/syscall.c:5495 __do_sys_bpf kernel/bpf/syscall.c:5581 [inline] __se_sys_bpf kernel/bpf/syscall.c:5579 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5579 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f248bf9ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f248cf23028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f248c215fa0 RCX: 00007f248bf9ce59 RDX: 0000000000000050 RSI: 00002000000001c0 RDI: 000000000000000a RBP: 00007f248c032d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f248c216038 R14: 00007f248c215fa0 R15: 00007fff265218b8 ---------------- Code disassembly (best guess): 0: 75 f1 jne 0xfffffff3 2: c3 ret 3: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) a: 00 00 00 d: 0f 1f 00 nopl (%rax) 10: 48 8b 06 mov (%rsi),%rax 13: 48 89 07 mov %rax,(%rdi) 16: 48 83 c6 08 add $0x8,%rsi 1a: 48 83 c7 08 add $0x8,%rdi 1e: 83 e9 08 sub $0x8,%ecx 21: 74 df je 0x2 23: 83 f9 08 cmp $0x8,%ecx 26: 73 e8 jae 0x10 28: eb c9 jmp 0xfffffff3 * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: c3 ret 2d: 48 8b 06 mov (%rsi),%rax 30: 48 89 07 mov %rax,(%rdi) 33: 48 8d 47 08 lea 0x8(%rdi),%rax 37: 48 83 e0 f8 and $0xfffffffffffffff8,%rax 3b: 48 29 f8 sub %rdi,%rax 3e: 48 rex.W 3f: 01 .byte 0x1