================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.1.2470/14065 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff88803149ab20 (&htab->lockdep_key){....}-{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+0x1a4/0x650 kernel/bpf/hashtab.c:1485 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_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: 2342 hardirqs last enabled at (2341): [] class_irqsave_destructor include/linux/irqflags.h:272 [inline] hardirqs last enabled at (2341): [] perf_swevent_event+0x476/0x570 kernel/events/core.c:9865 hardirqs last disabled at (2342): [] exc_debug_kernel arch/x86/kernel/traps.c:1063 [inline] hardirqs last disabled at (2342): [] exc_debug+0x73/0x140 arch/x86/kernel/traps.c:1199 softirqs last enabled at (2176): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last enabled at (2176): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last enabled at (2176): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 softirqs last disabled at (2163): [] __do_softirq kernel/softirq.c:612 [inline] softirqs last disabled at (2163): [] invoke_softirq kernel/softirq.c:452 [inline] softirqs last disabled at (2163): [] __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661 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.1.2470/14065. stack backtrace: CPU: 0 PID: 14065 Comm: syz.1.2470 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 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+0x1a4/0x650 kernel/bpf/hashtab.c:1485 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+0x4c/0x90 arch/x86/lib/copy_user_64.S:72 Code: 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 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 RSP: 0018:ffffc90003577d50 EFLAGS: 00040206 RAX: ffffffff842a6101 RBX: 0000000000000090 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000200000000310 RDI: ffffc90003577e50 RBP: ffffc90003577ee8 R08: ffffc90003577e4f R09: 1ffff920006aefc9 R10: dffffc0000000000 R11: fffff520006aefca R12: 0000200000000310 R13: 0000000000000090 R14: ffffc90003577dc0 R15: 0000200000000280 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] copy_from_bpfptr_offset include/linux/bpfptr.h:53 [inline] copy_from_bpfptr include/linux/bpfptr.h:59 [inline] __sys_bpf+0x23e/0x890 kernel/bpf/syscall.c:5450 __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: 0033:0x7fefe859ce59 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:00007fefe9546028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fefe8815fa0 RCX: 00007fefe859ce59 RDX: 0000000000000094 RSI: 0000200000000280 RDI: 0000000000000005 RBP: 00007fefe8632d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fefe8816038 R14: 00007fefe8815fa0 R15: 00007ffc95b50bf8 ---------------- Code disassembly (best guess): 0: c3 ret 1: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 8: 00 00 00 b: 0f 1f 00 nopl (%rax) e: 48 8b 06 mov (%rsi),%rax 11: 48 89 07 mov %rax,(%rdi) 14: 48 83 c6 08 add $0x8,%rsi 18: 48 83 c7 08 add $0x8,%rdi 1c: 83 e9 08 sub $0x8,%ecx 1f: 74 df je 0x0 21: 83 f9 08 cmp $0x8,%ecx 24: 73 e8 jae 0xe 26: eb c9 jmp 0xfffffff1 28: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) * 2a: c3 ret <-- trapping instruction 2b: 48 8b 06 mov (%rsi),%rax 2e: 48 89 07 mov %rax,(%rdi) 31: 48 8d 47 08 lea 0x8(%rdi),%rax 35: 48 83 e0 f8 and $0xfffffffffffffff8,%rax 39: 48 29 f8 sub %rdi,%rax 3c: 48 01 c7 add %rax,%rdi 3f: 48 rex.W