================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.0.8614/5996 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffe8ffffd3b7e8 (&loc_l->lock){....}-{2:2}, at: bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:514 [inline] ffffe8ffffd3b7e8 (&loc_l->lock){....}-{2:2}, at: bpf_lru_push_free+0x33b/0xbb0 kernel/bpf/bpf_lru_list.c:553 {INITIAL USE} state was registered at: lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:440 [inline] bpf_lru_pop_free+0x1a1/0x1ca0 kernel/bpf/bpf_lru_list.c:496 prealloc_lru_pop kernel/bpf/hashtab.c:301 [inline] __htab_lru_percpu_map_update_elem+0x198/0x790 kernel/bpf/hashtab.c:1443 bpf_percpu_hash_update+0x119/0x200 kernel/bpf/hashtab.c:2515 bpf_map_update_value+0x45a/0x920 kernel/bpf/syscall.c:273 map_update_elem+0x5fa/0x9d0 kernel/bpf/syscall.c:1812 __sys_bpf+0x6fa/0x950 kernel/bpf/syscall.c:6216 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 240490 hardirqs last enabled at (240489): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1629 [inline] hardirqs last enabled at (240489): [] __schedule+0x1b27/0x52d0 kernel/sched/core.c:6916 hardirqs last disabled at (240490): [] exc_debug_kernel+0x60/0x140 arch/x86/kernel/traps.c:1233 softirqs last enabled at (240474): [] bpf_test_run+0x1d1/0x830 net/bpf/test_run.c:-1 softirqs last disabled at (240468): [] bpf_test_run+0x1d1/0x830 net/bpf/test_run.c:-1 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&loc_l->lock); lock(&loc_l->lock); *** DEADLOCK *** no locks held by syz.0.8614/5996. stack backtrace: CPU: 1 UID: 0 PID: 5996 Comm: syz.0.8614 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: <#DB> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_usage_bug+0x28b/0x2e0 kernel/locking/lockdep.c:4042 lock_acquire+0x1b8/0x2e0 kernel/locking/lockdep.c:5859 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162 bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:514 [inline] bpf_lru_push_free+0x33b/0xbb0 kernel/bpf/bpf_lru_list.c:553 htab_lru_push_free kernel/bpf/hashtab.c:1271 [inline] htab_lru_map_delete_elem+0x3d3/0x440 kernel/bpf/hashtab.c:1561 bpf_prog_464bc2be3fc7c272+0x43/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline] __bpf_prog_run include/linux/filter.h:712 [inline] bpf_prog_run include/linux/filter.h:730 [inline] bpf_overflow_handler kernel/events/core.c:10605 [inline] __perf_event_overflow+0xde8/0xec0 kernel/events/core.c:10704 perf_swevent_overflow kernel/events/core.c:10845 [inline] perf_swevent_event+0x410/0x7e0 kernel/events/core.c:-1 perf_bp_event+0x318/0x430 kernel/events/core.c:11737 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:556 [inline] hw_breakpoint_exceptions_notify+0x243/0x680 arch/x86/kernel/hw_breakpoint.c:587 notifier_call_chain+0x1be/0x400 kernel/notifier.c:85 atomic_notifier_call_chain+0xda/0x180 kernel/notifier.c:223 notify_die+0x144/0x1a0 kernel/notifier.c:588 notify_debug+0x2e/0x50 arch/x86/kernel/traps.c:1208 exc_debug_kernel+0xb1/0x140 arch/x86/kernel/traps.c:1270 asm_exc_debug+0x1e/0x40 arch/x86/include/asm/idtentry.h:654 RIP: 0010:rep_movs_alternative+0x36/0x90 arch/x86/lib/copy_user_64.S:62 Code: c9 74 0f 8a 06 88 07 48 ff c7 48 ff c6 48 ff c9 75 f1 c3 cc cc cc cc 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 db 83 f9 08 73 e8 eb c5 f3 a4 RSP: 0018:ffffc9000cbd7a28 EFLAGS: 00040212 RAX: 0000080000000000 RBX: 0000000000000010 RCX: 0000000000000010 RDX: 0000000000000000 RSI: ffff88807c959c40 RDI: 0000200000000300 RBP: ffffc9000cbd7b78 R08: ffff88807c959c4f R09: 1ffff1100f92b389 R10: dffffc0000000000 R11: ffffed100f92b38a R12: 0000200000000310 R13: 00007ffffffff000 R14: ffff88807c959c40 R15: 0000200000000300 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] _inline_copy_to_user include/linux/uaccess.h:206 [inline] _copy_to_user+0x8a/0xb0 lib/usercopy.c:26 copy_to_user include/linux/uaccess.h:236 [inline] bpf_test_finish+0x191/0x6b0 net/bpf/test_run.c:463 bpf_prog_test_run_skb+0x117d/0x1e10 net/bpf/test_run.c:1207 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4722 __sys_bpf+0x643/0x950 kernel/bpf/syscall.c:6246 __do_sys_bpf kernel/bpf/syscall.c:6341 [inline] __se_sys_bpf kernel/bpf/syscall.c:6339 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6339 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd83f79c799 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:00007fd840626028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fd83fa15fa0 RCX: 00007fd83f79c799 RDX: 000000000000004c RSI: 0000200000000240 RDI: 000000000000000a RBP: 00007fd83f832c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd83fa16038 R14: 00007fd83fa15fa0 R15: 00007ffcb98d6d48 ---------------- Code disassembly (best guess): 0: c9 leave 1: 74 0f je 0x12 3: 8a 06 mov (%rsi),%al 5: 88 07 mov %al,(%rdi) 7: 48 ff c7 inc %rdi a: 48 ff c6 inc %rsi d: 48 ff c9 dec %rcx 10: 75 f1 jne 0x3 12: c3 ret 13: cc int3 14: cc int3 15: cc int3 16: cc int3 17: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 1e: 00 00 00 21: 0f 1f 00 nopl (%rax) 24: 48 8b 06 mov (%rsi),%rax 27: 48 89 07 mov %rax,(%rdi) * 2a: 48 83 c6 08 add $0x8,%rsi <-- trapping instruction 2e: 48 83 c7 08 add $0x8,%rdi 32: 83 e9 08 sub $0x8,%ecx 35: 74 db je 0x12 37: 83 f9 08 cmp $0x8,%ecx 3a: 73 e8 jae 0x24 3c: eb c5 jmp 0x3 3e: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)