================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.3.274/6828 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff88802e5a41a0 (&htab->lockdep_key#2){....}-{2:2}, at: htab_lock_bucket+0x17d/0x300 kernel/bpf/hashtab.c:166 {INITIAL USE} state was registered at: lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 htab_lock_bucket+0x17d/0x300 kernel/bpf/hashtab.c:166 htab_lru_map_delete_elem+0x19f/0x640 kernel/bpf/hashtab.c:1485 bpf_prog_69bf374aa003a95d+0x46/0x4a 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:10576 __perf_event_overflow+0x461/0x660 kernel/events/core.c:9712 perf_swevent_overflow kernel/events/core.c:9795 [inline] perf_swevent_event+0x319/0x570 kernel/events/core.c:9846 perf_bp_event+0x319/0x430 kernel/events/core.c:10773 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+0x18f/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_user arch/x86/kernel/traps.c:1168 [inline] noist_exc_debug+0x77/0x120 arch/x86/kernel/traps.c:1205 asm_exc_debug+0x33/0x40 arch/x86/include/asm/idtentry.h:644 irq event stamp: 76914 hardirqs last enabled at (76913): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1391 [inline] hardirqs last enabled at (76913): [] finish_lock_switch kernel/sched/core.c:5135 [inline] hardirqs last enabled at (76913): [] finish_task_switch+0x262/0x8f0 kernel/sched/core.c:5253 hardirqs last disabled at (76914): [] exc_debug_kernel arch/x86/kernel/traps.c:1063 [inline] hardirqs last disabled at (76914): [] exc_debug+0x73/0x140 arch/x86/kernel/traps.c:1199 softirqs last enabled at (76896): [] bpf_test_run+0x174/0x870 net/bpf/test_run.c:-1 softirqs last disabled at (76892): [] bpf_test_run+0x174/0x870 net/bpf/test_run.c:-1 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&htab->lockdep_key#2); lock(&htab->lockdep_key#2); *** DEADLOCK *** no locks held by syz.3.274/6828. stack backtrace: CPU: 0 PID: 6828 Comm: syz.3.274 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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 include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 htab_lock_bucket+0x17d/0x300 kernel/bpf/hashtab.c:166 htab_lru_map_delete_elem+0x19f/0x640 kernel/bpf/hashtab.c:1485 bpf_prog_69bf374aa003a95d+0x46/0x4a 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:10576 __perf_event_overflow+0x461/0x660 kernel/events/core.c:9712 perf_swevent_overflow kernel/events/core.c:9795 [inline] perf_swevent_event+0x319/0x570 kernel/events/core.c:9846 perf_bp_event+0x319/0x430 kernel/events/core.c:10773 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+0x18f/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+0x36/0x90 arch/x86/lib/copy_user_64.S:59 Code: 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 00 00 0f 1f 00 48 8b 06 48 89 07 <48> 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 f3 a4 RSP: 0018:ffffc90004fffad0 EFLAGS: 00040212 RAX: 0000000000000000 RBX: 0000000000000010 RCX: 0000000000000010 RDX: 0000000000000000 RSI: ffff88801ef0d440 RDI: 0000200000000300 RBP: ffffc90004fffc20 R08: ffff88801ef0d44f R09: 1ffff11003de1a89 R10: dffffc0000000000 R11: ffffed1003de1a8a R12: 0000200000000310 R13: 0000000000000010 R14: 0000200000000300 R15: ffff88801ef0d440 copy_user_generic arch/x86/include/asm/uaccess_64.h:112 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:133 [inline] _copy_to_user+0x85/0xa0 lib/usercopy.c:41 copy_to_user include/linux/uaccess.h:191 [inline] bpf_test_finish+0x206/0x650 net/bpf/test_run.c:462 bpf_prog_test_run_skb+0x1135/0x18f0 net/bpf/test_run.c:1123 bpf_prog_test_run+0x31f/0x390 kernel/bpf/syscall.c:4132 __sys_bpf+0x49d/0x890 kernel/bpf/syscall.c:5495 __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+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc8d659ce59 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:00007fc8d7479028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc8d6816180 RCX: 00007fc8d659ce59 RDX: 000000000000004c RSI: 0000200000000240 RDI: 000000000000000a RBP: 00007fc8d6632e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc8d6816218 R14: 00007fc8d6816180 R15: 00007ffef3c81988 ---------------- Code disassembly (best guess): 0: 08 73 21 or %dh,0x21(%rbx) 3: 85 c9 test %ecx,%ecx 5: 74 0f je 0x16 7: 8a 06 mov (%rsi),%al 9: 88 07 mov %al,(%rdi) b: 48 ff c7 inc %rdi e: 48 ff c6 inc %rsi 11: 48 ff c9 dec %rcx 14: 75 f1 jne 0x7 16: c3 ret 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 df je 0x16 37: 83 f9 08 cmp $0x8,%ecx 3a: 73 e8 jae 0x24 3c: eb c9 jmp 0x7 3e: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)