================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.0.1048/8128 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff888049f25a38 (&trie->lock){....}-{2:2}, at: trie_delete_elem+0x8f/0x690 kernel/bpf/lpm_trie.c:467 {INITIAL USE} state was registered at: lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:162 trie_update_elem+0xc0/0xd50 kernel/bpf/lpm_trie.c:323 bpf_map_update_value+0x57c/0x650 kernel/bpf/syscall.c:223 generic_map_update_batch+0x52c/0x7d0 kernel/bpf/syscall.c:1430 bpf_map_do_batch+0x475/0x5f0 kernel/bpf/syscall.c:-1 __sys_bpf+0x671/0x6f0 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline] __se_sys_bpf kernel/bpf/syscall.c:4759 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 irq event stamp: 1146 hardirqs last enabled at (1145): [] mod_lruvec_page_state include/linux/vmstat.h:497 [inline] hardirqs last enabled at (1145): [] kmalloc_order+0xaf/0x150 mm/slab_common.c:989 hardirqs last disabled at (1146): [] exc_debug_kernel arch/x86/kernel/traps.c:893 [inline] hardirqs last disabled at (1146): [] exc_debug+0x6e/0x130 arch/x86/kernel/traps.c:1029 softirqs last enabled at (1134): [] lock_sock include/net/sock.h:1744 [inline] softirqs last enabled at (1134): [] do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:418 [inline] softirqs last enabled at (1134): [] ipv6_setsockopt+0x4e1/0x3cc0 net/ipv6/ipv6_sockglue.c:1009 softirqs last disabled at (1132): [] spin_lock_bh include/linux/spinlock.h:369 [inline] softirqs last disabled at (1132): [] lock_sock_nested+0x68/0x100 net/core/sock.c:3262 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&trie->lock); lock(&trie->lock); *** DEADLOCK *** 2 locks held by syz.0.1048/8128: #0: ffffffff8d44b148 (rtnl_mutex){+.+.}-{3:3}, at: do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:417 [inline] #0: ffffffff8d44b148 (rtnl_mutex){+.+.}-{3:3}, at: ipv6_setsockopt+0x49c/0x3cc0 net/ipv6/ipv6_sockglue.c:1009 #1: ffff88807b7ae920 (sk_lock-AF_INET6){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1744 [inline] #1: ffff88807b7ae920 (sk_lock-AF_INET6){+.+.}-{0:0}, at: do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:418 [inline] #1: ffff88807b7ae920 (sk_lock-AF_INET6){+.+.}-{0:0}, at: ipv6_setsockopt+0x4e1/0x3cc0 net/ipv6/ipv6_sockglue.c:1009 stack backtrace: CPU: 1 PID: 8128 Comm: syz.0.1048 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 Call Trace: <#DB> dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 lock_acquire+0x2c3/0x400 kernel/locking/lockdep.c:5614 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb0/0x100 kernel/locking/spinlock.c:162 trie_delete_elem+0x8f/0x690 kernel/bpf/lpm_trie.c:467 bpf_prog_2c29ac5cdc6b1842+0x3a/0x304 bpf_dispatcher_nop_func include/linux/bpf.h:888 [inline] __bpf_prog_run include/linux/filter.h:628 [inline] bpf_prog_run include/linux/filter.h:635 [inline] bpf_overflow_handler+0x1c2/0x4a0 kernel/events/core.c:10297 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9515 perf_bp_event+0x276/0x320 kernel/events/core.c:10484 hw_breakpoint_handler arch/x86/kernel/hw_breakpoint.c:555 [inline] hw_breakpoint_exceptions_notify+0x14d/0x470 arch/x86/kernel/hw_breakpoint.c:586 notifier_call_chain kernel/notifier.c:83 [inline] atomic_notifier_call_chain+0x15d/0x280 kernel/notifier.c:198 notify_die+0x141/0x1a0 kernel/notifier.c:529 notify_debug+0x20/0x30 arch/x86/kernel/traps.c:872 exc_debug_kernel arch/x86/kernel/traps.c:929 [inline] exc_debug+0xcf/0x130 arch/x86/kernel/traps.c:1029 asm_exc_debug+0x1a/0x40 arch/x86/include/asm/idtentry.h:642 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 90 90 90 89 d1 83 f8 RSP: 0018:ffffc9000308f848 EFLAGS: 00050206 RAX: ffffffff83e81901 RBX: 0000000000005000 RCX: 0000000000004dc0 RDX: 0000000000005000 RSI: 0000200000000340 RDI: ffff88807bf08240 RBP: 0000000000000000 R08: ffff88807bf0cfff R09: 1ffff1100f7e19ff R10: dffffc0000000000 R11: ffffed100f7e1a00 R12: 00007ffffffff000 R13: 0000200000005100 R14: ffff88807bf08000 R15: 0000200000000100 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+0xfa/0x170 lib/usercopy.c:23 copy_from_user include/linux/uaccess.h:192 [inline] copy_from_sockptr_offset include/linux/sockptr.h:48 [inline] copy_from_sockptr include/linux/sockptr.h:55 [inline] memdup_sockptr include/linux/sockptr.h:78 [inline] ipv6_set_mcast_msfilter+0x118/0x2c0 net/ipv6/ipv6_sockglue.c:214 do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:894 [inline] ipv6_setsockopt+0xe3a/0x3cc0 net/ipv6/ipv6_sockglue.c:1009 __sys_setsockopt+0x2bf/0x3d0 net/socket.c:2213 __do_sys_setsockopt net/socket.c:2224 [inline] __se_sys_setsockopt net/socket.c:2221 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2221 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7fc0e6eece59 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:00007fc0e5145028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fc0e7174fa0 RCX: 00007fc0e6eece59 RDX: 0000000000000030 RSI: 0000000000000029 RDI: 000000000000000a RBP: 00007fc0e6f82e6f R08: 0000000000005000 R09: 0000000000000000 R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc0e7175038 R14: 00007fc0e7174fa0 R15: 00007ffde2b60e68 ---------------- Code disassembly (best guess): 0: 89 d1 mov %edx,%ecx 2: c1 e9 03 shr $0x3,%ecx 5: 83 e2 07 and $0x7,%edx 8: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) b: 89 d1 mov %edx,%ecx d: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) f: 31 c0 xor %eax,%eax 11: 0f 01 ca clac 14: c3 ret 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 0f 01 cb stac 1f: 83 fa 40 cmp $0x40,%edx 22: 0f 82 70 ff ff ff jb 0xffffff98 28: 89 d1 mov %edx,%ecx * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 31 c0 xor %eax,%eax 2e: 0f 01 ca clac 31: c3 ret 32: 90 nop 33: 90 nop 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: 89 d1 mov %edx,%ecx 3e: 83 .byte 0x83 3f: f8 clc