================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.1.9563/3629 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff88807a75fa38 (&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: 2126 hardirqs last enabled at (2125): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (2125): [] _raw_spin_unlock_irqrestore+0x86/0x120 kernel/locking/spinlock.c:194 hardirqs last disabled at (2126): [] exc_debug_kernel arch/x86/kernel/traps.c:1063 [inline] hardirqs last disabled at (2126): [] exc_debug+0x73/0x140 arch/x86/kernel/traps.c:1199 softirqs last enabled at (1616): [] bpf_prog_load+0x1266/0x1670 kernel/bpf/syscall.c:2779 softirqs last disabled at (1614): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (1614): [] bpf_ksym_add+0x2d/0x340 kernel/bpf/core.c:655 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.1.9563/3629. stack backtrace: CPU: 1 PID: 3629 Comm: syz.1.9563 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+0x15/0x90 arch/x86/lib/copy_user_64.S:44 Code: 8b 1c 24 4c 8b 64 24 08 48 83 c4 10 c3 cc cc cc cc cc cc cc cc f3 0f 1e fa 48 83 f9 40 73 40 83 f9 08 73 21 85 c9 74 0f 8a 06 <88> 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc90002e47bd0 EFLAGS: 00040202 RAX: ffffffff842a1f00 RBX: 0000000000000006 RCX: 0000000000000002 RDX: 0000000000000001 RSI: 0000200000000300 RDI: ffff88802bf1398c RBP: ffffc90002e47d20 R08: 0000000000000005 R09: 0000000000000006 R10: dffffc0000000000 R11: ffffed10057e2731 R12: 0000200000000302 R13: 1ffff920005c8fbd R14: ffff88802bf13988 R15: 00002000000002fc 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] generic_map_update_batch+0x59a/0x810 kernel/bpf/syscall.c:1797 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 RIP: 0033:0x7f783299cdd9 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:00007f78337db028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7832c15fa0 RCX: 00007f783299cdd9 RDX: 0000000000000038 RSI: 0000200000000200 RDI: 000000000000001a RBP: 00007f7832a32d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7832c16038 R14: 00007f7832c15fa0 R15: 00007ffd337647d8 ---------------- Code disassembly (best guess): 0: 8b 1c 24 mov (%rsp),%ebx 3: 4c 8b 64 24 08 mov 0x8(%rsp),%r12 8: 48 83 c4 10 add $0x10,%rsp c: c3 ret d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: cc int3 12: cc int3 13: cc int3 14: cc int3 15: f3 0f 1e fa endbr64 19: 48 83 f9 40 cmp $0x40,%rcx 1d: 73 40 jae 0x5f 1f: 83 f9 08 cmp $0x8,%ecx 22: 73 21 jae 0x45 24: 85 c9 test %ecx,%ecx 26: 74 0f je 0x37 28: 8a 06 mov (%rsi),%al * 2a: 88 07 mov %al,(%rdi) <-- trapping instruction 2c: 48 ff c7 inc %rdi 2f: 48 ff c6 inc %rsi 32: 48 ff c9 dec %rcx 35: 75 f1 jne 0x28 37: c3 ret 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax)