================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.4.6873/7421 [HC1[1]:SC0[0]:HE0:SE1] takes: ffffe8ffffc606b8 (&loc_l->lock){....}-{2:2}, at: bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:514 [inline] ffffe8ffffc606b8 (&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+0x106/0x330 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [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:296 [inline] __htab_lru_percpu_map_update_elem+0x1d2/0x7b0 kernel/bpf/hashtab.c:1361 bpf_percpu_hash_update+0x119/0x200 kernel/bpf/hashtab.c:2431 bpf_map_update_value+0x45a/0x920 kernel/bpf/syscall.c:272 map_update_elem+0x5fa/0x9d0 kernel/bpf/syscall.c:1811 __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+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f irq event stamp: 630 hardirqs last enabled at (629): [] syscall_enter_from_user_mode include/linux/entry-common.h:108 [inline] hardirqs last enabled at (629): [] do_syscall_64+0xa6/0xf80 arch/x86/entry/syscall_64.c:90 hardirqs last disabled at (630): [] exc_debug_kernel+0x60/0x140 arch/x86/kernel/traps.c:1233 softirqs last enabled at (526): [] bpf_prog_load+0x15d4/0x1ae0 kernel/bpf/syscall.c:3118 softirqs last disabled at (524): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (524): [] bpf_ksym_add+0x2d/0x340 kernel/bpf/core.c:640 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.4.6873/7421. stack backtrace: CPU: 0 UID: 0 PID: 7421 Comm: syz.4.6873 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 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+0x1cc/0x330 kernel/locking/lockdep.c:5859 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [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:1189 [inline] htab_lru_map_delete_elem+0x3a3/0x410 kernel/bpf/hashtab.c:1479 bpf_prog_464bc2be3fc7c272+0x43/0x4b bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] bpf_overflow_handler kernel/events/core.c:10303 [inline] __perf_event_overflow+0x3b7/0xec0 kernel/events/core.c:10402 perf_swevent_overflow kernel/events/core.c:10536 [inline] perf_swevent_event+0x323/0x650 kernel/events/core.c:-1 perf_bp_event+0x2a6/0x390 kernel/events/core.c:11395 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+0x19d/0x3a0 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+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: 44 04 00 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 a4 e9 cf 44 04 00 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc90004ddfcf8 EFLAGS: 00050202 RAX: 00007ffffffff001 RBX: 0000000000000048 RCX: 0000000000000007 RDX: 0000000000000001 RSI: 0000200000000301 RDI: ffffc90004ddfda1 RBP: ffffc90004ddfeb8 R08: ffffc90004ddfda7 R09: 1ffff920009bbfb4 R10: dffffc0000000000 R11: fffff520009bbfb5 R12: dffffc0000000000 R13: 0000000000000048 R14: ffffc90004ddfd60 R15: 00002000000002c0 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] _inline_copy_from_user include/linux/uaccess.h:185 [inline] _copy_from_user+0x7a/0xb0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:223 [inline] copy_from_bpfptr_offset include/linux/bpfptr.h:53 [inline] copy_from_bpfptr include/linux/bpfptr.h:59 [inline] __sys_bpf+0x229/0x950 kernel/bpf/syscall.c:6201 __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+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f748799aeb9 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:00007f748889f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7487c15fa0 RCX: 00007f748799aeb9 RDX: 0000000000000048 RSI: 00002000000002c0 RDI: 0000000000000000 RBP: 00007f7487a08c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7487c16038 R14: 00007f7487c15fa0 R15: 00007ffc5660bb38 ---------------- Code disassembly (best guess): 0: 44 04 00 rex.R add $0x0,%al 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 db je 0xfffffffe 23: 83 f9 08 cmp $0x8,%ecx 26: 73 e8 jae 0x10 28: eb c5 jmp 0xffffffef * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: e9 cf 44 04 00 jmp 0x44500 31: 48 8b 06 mov (%rsi),%rax 34: 48 89 07 mov %rax,(%rdi) 37: 48 8d 47 08 lea 0x8(%rdi),%rax 3b: 48 83 e0 f8 and $0xfffffffffffffff8,%rax 3f: 48 rex.W