================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.1.10027/5223 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff888066f08aa0 (&htab->lockdep_key){....}-{2:2}, at: htab_lock_bucket+0x179/0x2f0 kernel/bpf/hashtab.c:166 {INITIAL USE} state was registered at: lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 htab_lock_bucket+0x179/0x2f0 kernel/bpf/hashtab.c:166 htab_lru_map_delete_elem+0x1ad/0x780 kernel/bpf/hashtab.c:1438 bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:1012 [inline] __bpf_prog_run include/linux/filter.h:607 [inline] bpf_prog_run include/linux/filter.h:614 [inline] bpf_overflow_handler+0x522/0x7c0 kernel/events/core.c:10321 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496 perf_swevent_overflow kernel/events/core.c:9579 [inline] perf_swevent_event+0x315/0x570 kernel/events/core.c:9630 perf_bp_event+0x312/0x3f0 kernel/events/core.c:10518 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x152/0x470 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0x17a/0x2b0 kernel/notifier.c:225 notify_die+0x141/0x1a0 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+0x73/0x120 arch/x86/kernel/traps.c:1181 asm_exc_debug+0x2f/0x40 arch/x86/include/asm/idtentry.h:648 irq event stamp: 2286 hardirqs last enabled at (2285): [] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 hardirqs last disabled at (2286): [] exc_debug_kernel arch/x86/kernel/traps.c:1039 [inline] hardirqs last disabled at (2286): [] exc_debug+0x6e/0x130 arch/x86/kernel/traps.c:1175 softirqs last enabled at (1790): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last enabled at (1790): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last enabled at (1790): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 softirqs last disabled at (1393): [] __do_softirq kernel/softirq.c:630 [inline] softirqs last disabled at (1393): [] invoke_softirq kernel/softirq.c:470 [inline] softirqs last disabled at (1393): [] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&htab->lockdep_key); lock(&htab->lockdep_key); *** DEADLOCK *** no locks held by syz.1.10027/5223. stack backtrace: CPU: 0 PID: 5223 Comm: syz.1.10027 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: <#DB> dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 lock_acquire+0x2df/0x4a0 kernel/locking/lockdep.c:5653 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 htab_lock_bucket+0x179/0x2f0 kernel/bpf/hashtab.c:166 htab_lru_map_delete_elem+0x1ad/0x780 kernel/bpf/hashtab.c:1438 bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:1012 [inline] __bpf_prog_run include/linux/filter.h:607 [inline] bpf_prog_run include/linux/filter.h:614 [inline] bpf_overflow_handler+0x522/0x7c0 kernel/events/core.c:10321 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496 perf_swevent_overflow kernel/events/core.c:9579 [inline] perf_swevent_event+0x315/0x570 kernel/events/core.c:9630 perf_bp_event+0x312/0x3f0 kernel/events/core.c:10518 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x152/0x470 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0x17a/0x2b0 kernel/notifier.c:225 notify_die+0x141/0x1a0 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+0xd9/0x130 arch/x86/kernel/traps.c:1175 asm_exc_debug+0x1a/0x40 arch/x86/include/asm/idtentry.h:648 RIP: 0010:has_zero arch/x86/include/asm/word-at-a-time.h:49 [inline] RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:54 [inline] RIP: 0010:strncpy_from_user+0x14f/0x350 lib/strncpy_from_user.c:139 Code: f7 dd 49 fd 49 83 fc 07 0f 86 a1 00 00 00 4c 89 74 24 08 48 c7 44 24 10 f8 ff ff ff 45 31 ed 4c 89 3c 24 48 89 dd 4f 8b 3c 2f <48> b8 ff fe fe fe fe fe fe fe 49 8d 1c 07 4d 89 fe 49 f7 d6 48 b8 RSP: 0018:ffffc90004007d20 EFLAGS: 00040246 RAX: ffffffff84389b39 RBX: ffff8880774a6620 RCX: ffff8880538a5940 RDX: 0000000000000002 RSI: 0000000000000fe0 RDI: 0000000000000007 RBP: ffff8880774a6620 R08: ffffea0001dd2807 R09: 1ffffd40003ba500 R10: dffffc0000000000 R11: fffff940003ba501 R12: 0000000000000fe0 R13: 0000000000000000 R14: 0000000000000fe0 R15: 66622e6f696b6c62 getname_flags+0xf2/0x500 fs/namei.c:150 do_sys_openat2+0xdd/0x4b0 fs/open.c:1314 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1347 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f1da079cdd9 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:00007f1d9e9f6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f1da0a15fa0 RCX: 00007f1da079cdd9 RDX: 00000000000026e1 RSI: 0000200000000300 RDI: ffffffffffffff9c RBP: 00007f1da0832d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1da0a16038 R14: 00007f1da0a15fa0 R15: 00007ffe93322758 ---------------- Code disassembly (best guess): 0: f7 dd neg %ebp 2: 49 fd rex.WB std 4: 49 83 fc 07 cmp $0x7,%r12 8: 0f 86 a1 00 00 00 jbe 0xaf e: 4c 89 74 24 08 mov %r14,0x8(%rsp) 13: 48 c7 44 24 10 f8 ff movq $0xfffffffffffffff8,0x10(%rsp) 1a: ff ff 1c: 45 31 ed xor %r13d,%r13d 1f: 4c 89 3c 24 mov %r15,(%rsp) 23: 48 89 dd mov %rbx,%rbp 26: 4f 8b 3c 2f mov (%r15,%r13,1),%r15 * 2a: 48 b8 ff fe fe fe fe movabs $0xfefefefefefefeff,%rax <-- trapping instruction 31: fe fe fe 34: 49 8d 1c 07 lea (%r15,%rax,1),%rbx 38: 4d 89 fe mov %r15,%r14 3b: 49 f7 d6 not %r14 3e: 48 rex.W 3f: b8 .byte 0xb8