================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.2.17/3153 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff888117046238 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x39/0x1d0 kernel/bpf/lpm_trie.c:467 {INITIAL USE} state was registered at: lock_acquire+0xe9/0x270 kernel/locking/lockdep.c:5662 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x90 kernel/locking/spinlock.c:162 trie_delete_elem+0x39/0x1d0 kernel/bpf/lpm_trie.c:467 ____bpf_map_delete_elem kernel/bpf/helpers.c:73 [inline] bpf_map_delete_elem+0x38/0x40 kernel/bpf/helpers.c:69 ___bpf_prog_run+0x8ef/0x1cd0 kernel/bpf/core.c:1846 __bpf_prog_run32+0xb7/0xe0 kernel/bpf/core.c:2072 bpf_dispatcher_nop_func include/linux/bpf.h:1012 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] bpf_overflow_handler+0x23c/0x360 kernel/events/core.c:10286 __perf_event_overflow+0x103/0x170 kernel/events/core.c:9496 perf_swevent_overflow kernel/events/core.c:9572 [inline] perf_swevent_event+0x106/0x120 kernel/events/core.c:9610 perf_bp_event+0x9c/0xc0 kernel/events/core.c:10478 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x94/0x1c0 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0xbd/0x130 kernel/notifier.c:225 notify_die+0x81/0xa0 kernel/notifier.c:593 notify_debug+0x20/0x30 arch/x86/kernel/traps.c:1018 exc_debug_user arch/x86/kernel/traps.c:1144 [inline] noist_exc_debug+0x63/0x100 arch/x86/kernel/traps.c:1181 asm_exc_debug+0x2f/0x40 arch/x86/include/asm/idtentry.h:648 irq event stamp: 1414 hardirqs last enabled at (1413): [] native_save_fl arch/x86/include/asm/irqflags.h:22 [inline] hardirqs last enabled at (1413): [] arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] hardirqs last enabled at (1413): [] arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline] hardirqs last enabled at (1413): [] seqcount_lockdep_reader_access+0xa9/0x100 include/linux/seqlock.h:104 hardirqs last disabled at (1414): [] exc_debug_kernel arch/x86/kernel/traps.c:1039 [inline] hardirqs last disabled at (1414): [] exc_debug+0x6e/0x120 arch/x86/kernel/traps.c:1175 softirqs last enabled at (1162): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (1162): [] bpf_prog_alloc_id+0x54/0xe0 kernel/bpf/syscall.c:2025 softirqs last disabled at (1160): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (1160): [] bpf_prog_alloc_id+0x1c/0xe0 kernel/bpf/syscall.c:2021 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.2.17/3153. stack backtrace: CPU: 1 PID: 3153 Comm: syz.2.17 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: <#DB> dump_stack_lvl+0x7f/0xdb lib/dump_stack.c:106 lock_acquire+0x1d5/0x270 kernel/locking/lockdep.c:5653 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x5c/0x90 kernel/locking/spinlock.c:162 trie_delete_elem+0x39/0x1d0 kernel/bpf/lpm_trie.c:467 ____bpf_map_delete_elem kernel/bpf/helpers.c:73 [inline] bpf_map_delete_elem+0x38/0x40 kernel/bpf/helpers.c:69 ___bpf_prog_run+0x8ef/0x1cd0 kernel/bpf/core.c:1846 __bpf_prog_run32+0xb7/0xe0 kernel/bpf/core.c:2072 bpf_dispatcher_nop_func include/linux/bpf.h:1012 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] bpf_overflow_handler+0x23c/0x360 kernel/events/core.c:10286 __perf_event_overflow+0x103/0x170 kernel/events/core.c:9496 perf_swevent_overflow kernel/events/core.c:9572 [inline] perf_swevent_event+0x106/0x120 kernel/events/core.c:9610 perf_bp_event+0x9c/0xc0 kernel/events/core.c:10478 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x94/0x1c0 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0xbd/0x130 kernel/notifier.c:225 notify_die+0x81/0xa0 kernel/notifier.c:593 notify_debug+0x20/0x30 arch/x86/kernel/traps.c:1018 exc_debug_kernel arch/x86/kernel/traps.c:1075 [inline] exc_debug+0xcc/0x120 arch/x86/kernel/traps.c:1175 asm_exc_debug+0x1a/0x40 arch/x86/include/asm/idtentry.h:648 RIP: 0010:copy_user_enhanced_fast_string+0xa/0x40 arch/x86/lib/copy_user_64.S:166 Code: ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 a4 31 c0 0f 01 ca c3 89 ca eb 0a 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900013d3ce8 EFLAGS: 00050206 RAX: 00007fffffffe1c0 RBX: 0000000000000e40 RCX: 0000000000000e3f RDX: 0000000000000e40 RSI: ffff888104361041 RDI: 0000200000000301 RBP: 0000000000000e40 R08: 0000000000000000 R09: ffff88811803d340 R10: ffffc900013d3bc8 R11: 0000000000000028 R12: 0000000000000e40 R13: ffff888104361040 R14: 0000200000000300 R15: ffff888104361040 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline] _copy_to_user+0x49/0x60 lib/usercopy.c:41 copy_to_user include/linux/uaccess.h:169 [inline] bpf_test_finish+0xa9/0x280 net/bpf/test_run.c:439 bpf_prog_test_run_skb+0x4ee/0x530 net/bpf/test_run.c:1203 bpf_prog_test_run+0xda/0x100 kernel/bpf/syscall.c:3692 __sys_bpf+0x344/0x3f0 kernel/bpf/syscall.c:5045 __do_sys_bpf kernel/bpf/syscall.c:5131 [inline] __se_sys_bpf kernel/bpf/syscall.c:5129 [inline] __x64_sys_bpf+0x13/0x20 kernel/bpf/syscall.c:5129 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f3c3630f749 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:00007f3c3617f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f3c36565fa0 RCX: 00007f3c3630f749 RDX: 000000000000004c RSI: 0000200000000240 RDI: 000000000000000a RBP: 00007f3c36393f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f3c36566038 R14: 00007f3c36565fa0 R15: 00007ffc18bd30e8 ---------------- Code disassembly (best guess): 0: ff c9 dec %ecx 2: 75 f2 jne 0xfffffff6 4: 89 d1 mov %edx,%ecx 6: c1 e9 03 shr $0x3,%ecx 9: 83 e2 07 and $0x7,%edx c: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) f: 89 d1 mov %edx,%ecx 11: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 13: 31 c0 xor %eax,%eax 15: 0f 01 ca clac 18: c3 ret 19: 8d 0c ca lea (%rdx,%rcx,8),%ecx 1c: 89 ca mov %ecx,%edx 1e: eb 20 jmp 0x40 20: 0f 01 cb stac 23: 83 fa 40 cmp $0x40,%edx 26: 72 38 jb 0x60 28: 89 d1 mov %edx,%ecx * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 31 c0 xor %eax,%eax 2e: 0f 01 ca clac 31: c3 ret 32: 89 ca mov %ecx,%edx 34: eb 0a jmp 0x40 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop