bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) ================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.5.7738/30009 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff888072ea6ea0 (&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: 842 hardirqs last enabled at (841): [] syscall_enter_from_user_mode+0x21/0x80 kernel/entry/common.c:117 hardirqs last disabled at (842): [] exc_debug_kernel arch/x86/kernel/traps.c:1039 [inline] hardirqs last disabled at (842): [] exc_debug+0x6e/0x130 arch/x86/kernel/traps.c:1175 softirqs last enabled at (466): [] bpf_prog_load+0x1127/0x1560 kernel/bpf/syscall.c:2677 softirqs last disabled at (464): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (464): [] bpf_ksym_add+0x29/0x340 kernel/bpf/core.c:649 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.5.7738/30009. stack backtrace: CPU: 1 PID: 30009 Comm: syz.5.7738 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:copy_user_enhanced_fast_string+0xc/0x40 arch/x86/lib/copy_user_64.S:167 Code: 75 f2 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 8d 0c ca 89 ca eb 20 0f 01 cb 83 fa 40 72 38 89 d1 f3 a4 <31> c0 0f 01 ca c3 89 ca eb 0a 90 90 90 90 90 90 90 90 90 90 83 f8 RSP: 0018:ffffc9000409fd48 EFLAGS: 00040206 RAX: ffffffff84114901 RBX: 0000000000000090 RCX: 0000000000000000 RDX: 0000000000000090 RSI: 0000200000000310 RDI: ffffc9000409fe50 RBP: 0000000000000000 R08: ffffc9000409fe4f R09: 1ffff92000813fc9 R10: dffffc0000000000 R11: fffff52000813fca R12: 00007fffffffef70 R13: 0000000000000090 R14: ffffc9000409fdc0 R15: 0000200000000280 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] _copy_from_user+0xf4/0x170 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:161 [inline] copy_from_bpfptr_offset include/linux/bpfptr.h:53 [inline] copy_from_bpfptr include/linux/bpfptr.h:59 [inline] __sys_bpf+0x2ea/0x780 kernel/bpf/syscall.c:5004 __do_sys_bpf kernel/bpf/syscall.c:5135 [inline] __se_sys_bpf kernel/bpf/syscall.c:5133 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133 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: 0033:0x7fb61e39cdd9 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:00007fb61f1ea028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb61e615fa0 RCX: 00007fb61e39cdd9 RDX: 0000000000000094 RSI: 0000200000000280 RDI: 0000000000000005 RBP: 00007fb61e432d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb61e616038 R14: 00007fb61e615fa0 R15: 00007ffeb8ce5138 net_ratelimit: 16798 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) net_ratelimit: 32401 callbacks suppressed bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:c6:9b:99:49:d4:f5, vlan:0) ---------------- Code disassembly (best guess): 0: 75 f2 jne 0xfffffff4 2: 89 d1 mov %edx,%ecx 4: c1 e9 03 shr $0x3,%ecx 7: 83 e2 07 and $0x7,%edx a: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) d: 89 d1 mov %edx,%ecx f: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) 11: 31 c0 xor %eax,%eax 13: 0f 01 ca clac 16: c3 ret 17: 8d 0c ca lea (%rdx,%rcx,8),%ecx 1a: 89 ca mov %ecx,%edx 1c: eb 20 jmp 0x3e 1e: 0f 01 cb stac 21: 83 fa 40 cmp $0x40,%edx 24: 72 38 jb 0x5e 26: 89 d1 mov %edx,%ecx 28: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) * 2a: 31 c0 xor %eax,%eax <-- trapping instruction 2c: 0f 01 ca clac 2f: c3 ret 30: 89 ca mov %ecx,%edx 32: eb 0a jmp 0x3e 34: 90 nop 35: 90 nop 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 83 .byte 0x83 3f: f8 clc