================================ WARNING: inconsistent lock state syzkaller #0 Not tainted -------------------------------- inconsistent {INITIAL USE} -> {IN-NMI} usage. syz.3.6286/23363 [HC1[1]:SC0[0]:HE0:SE1] takes: ffff88804f631fa0 (&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_update_elem+0x2c6/0x990 kernel/bpf/hashtab.c:1259 bpf_map_update_value+0x660/0x720 kernel/bpf/syscall.c:203 map_update_elem+0x57b/0x700 kernel/bpf/syscall.c:1567 __sys_bpf+0x6b5/0x890 kernel/bpf/syscall.c:5465 __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+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 irq event stamp: 7698 hardirqs last enabled at (7697): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 hardirqs last disabled at (7698): [] exc_debug_kernel arch/x86/kernel/traps.c:1063 [inline] hardirqs last disabled at (7698): [] exc_debug+0x73/0x140 arch/x86/kernel/traps.c:1199 softirqs last enabled at (7592): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (7592): [] xfrm_state_walk+0x8a1/0xa50 net/xfrm/xfrm_state.c:2435 softirqs last disabled at (7590): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (7590): [] xfrm_state_walk+0xb1/0xa50 net/xfrm/xfrm_state.c:2409 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.3.6286/23363. stack backtrace: CPU: 0 PID: 23363 Comm: syz.3.6286 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 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_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: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+0x17/0x90 arch/x86/lib/copy_user_64.S:45 Code: 24 4c 8b 64 24 08 48 83 c4 10 c3 cc cc cc cc cc cc cc cc f3 0f 1e fa 48 83 f9 40 73 40 83 f9 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 RSP: 0018:ffffc900038a7bb0 EFLAGS: 00040202 RAX: ffffffff842a2210 RBX: 0000000000000004 RCX: 0000000000000004 RDX: 0000000000000000 RSI: ffff88802e7e1340 RDI: 0000200000000300 RBP: ffffc900038a7d20 R08: ffff88802e7e1343 R09: 1ffff11005cfc268 R10: dffffc0000000000 R11: ffffed1005cfc269 R12: 0000200000000304 R13: 1ffff92000714f90 R14: 0000200000000300 R15: ffff88802e7e1340 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] generic_map_lookup_batch+0x860/0xc60 kernel/bpf/syscall.c:1878 bpf_map_do_batch+0x2cb/0x610 kernel/bpf/syscall.c:5006 __sys_bpf+0x7d7/0x890 kernel/bpf/syscall.c:-1 __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+0x55/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f609b59c819 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:00007f609c41a028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f609b815fa0 RCX: 00007f609b59c819 RDX: 0000000000000038 RSI: 00002000000003c0 RDI: 0000000000000018 RBP: 00007f609b632c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f609b816038 R14: 00007f609b815fa0 R15: 00007ffe870c60d8 ---------------- Code disassembly (best guess): 0: 24 4c and $0x4c,%al 2: 8b 64 24 08 mov 0x8(%rsp),%esp 6: 48 83 c4 10 add $0x10,%rsp a: c3 ret b: cc int3 c: cc int3 d: cc int3 e: cc int3 f: cc int3 10: cc int3 11: cc int3 12: cc int3 13: f3 0f 1e fa endbr64 17: 48 83 f9 40 cmp $0x40,%rcx 1b: 73 40 jae 0x5d 1d: 83 f9 08 cmp $0x8,%ecx 20: 73 21 jae 0x43 22: 85 c9 test %ecx,%ecx 24: 74 0f je 0x35 26: 8a 06 mov (%rsi),%al 28: 88 07 mov %al,(%rdi) * 2a: 48 ff c7 inc %rdi <-- trapping instruction 2d: 48 ff c6 inc %rsi 30: 48 ff c9 dec %rcx 33: 75 f1 jne 0x26 35: c3 ret 36: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 3d: 00 00 00