================================
WARNING: inconsistent lock state
syzkaller #0 Not tainted
--------------------------------
inconsistent {INITIAL USE} -> {IN-NMI} usage.
syz.0.67/4610 [HC1[1]:SC0[0]:HE0:SE1] takes:
ffff88813fe24f20 (&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_update_elem+0x31e/0xe80 kernel/bpf/hashtab.c:1214
  bpf_map_update_value+0x59e/0x670 kernel/bpf/syscall.c:228
  map_update_elem+0x4d7/0x680 kernel/bpf/syscall.c:1473
  __sys_bpf+0x4ec/0x780 kernel/bpf/syscall.c:5019
  __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
irq event stamp: 1720
hardirqs last  enabled at (1719): [<ffffffff81bb1d11>] mod_lruvec_page_state include/linux/vmstat.h:563 [inline]
hardirqs last  enabled at (1719): [<ffffffff81bb1d11>] __kmalloc_large_node+0x101/0x1e0 mm/slab_common.c:1080
hardirqs last disabled at (1720): [<ffffffff8a2dc90e>] exc_debug_kernel arch/x86/kernel/traps.c:1039 [inline]
hardirqs last disabled at (1720): [<ffffffff8a2dc90e>] exc_debug+0x6e/0x130 arch/x86/kernel/traps.c:1175
softirqs last  enabled at (1644): [<ffffffff88e9bfa8>] sock_orphan include/net/sock.h:2204 [inline]
softirqs last  enabled at (1644): [<ffffffff88e9bfa8>] unix_release_sock+0x4e8/0xef0 net/unix/af_unix.c:598
softirqs last disabled at (1642): [<ffffffff88e9bf30>] sock_orphan include/net/sock.h:2200 [inline]
softirqs last disabled at (1642): [<ffffffff88e9bf30>] unix_release_sock+0x470/0xef0 net/unix/af_unix.c:598

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&htab->lockdep_key);
  <Interrupt>
    lock(&htab->lockdep_key);

 *** DEADLOCK ***

no locks held by syz.0.67/4610.

stack backtrace:
CPU: 1 PID: 4610 Comm: syz.0.67 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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+0xa/0x40 arch/x86/lib/copy_user_64.S:166
Code: ff c9 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
RSP: 0018:ffffc9000511f898 EFLAGS: 00050206
RAX: ffffffff840f3401 RBX: ffff88804a090040 RCX: 000000000000fa6f
RDX: 000000000000fdef RSI: 0000200000000380 RDI: ffff88804a0903c0
RBP: ffffc9000511f9d0 R08: ffff88804a09fe2e R09: 1ffff11009413fc5
R10: dffffc0000000000 R11: ffffed1009413fc6 R12: 1ffff92000a23fb7
R13: 0000200000000000 R14: 000000000000fdef R15: 00007ffffffef211
 </#DB>
 <TASK>
 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]
 copyin lib/iov_iter.c:183 [inline]
 _copy_from_iter+0x2a9/0x1130 lib/iov_iter.c:631
 copy_from_iter include/linux/uio.h:187 [inline]
 skb_copy_datagram_from_iter+0xef/0x690 net/core/datagram.c:561
 tun_get_user+0xb81/0x3c70 drivers/net/tun.c:1853
 tun_chr_write_iter+0x112/0x1f0 drivers/net/tun.c:2044
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x4b1/0xa30 fs/read_write.c:584
 ksys_write+0x14c/0x250 fs/read_write.c:637
 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: 0033:0x7f425699c819
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:00007f42578f7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4256c15fa0 RCX: 00007f425699c819
RDX: 000000000000fdef RSI: 0000200000000000 RDI: 00000000000000c8
RBP: 00007f4256a32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4256c16038 R14: 00007f4256c15fa0 R15: 00007fff1dd8e728
 </TASK>
----------------
Code disassembly (best guess):
   0:	ff c9                	dec    %ecx
   2:	75 f2                	jne    0xfffffff6
   4:	89 d1                	mov    %edx,%ecx
   6:	c1 e9 03             	shr    $0x3,%ecx
   9:	83 e2 07             	and    $0x7,%edx
   c:	f3 48 a5             	rep movsq %ds:(%rsi),%es:(%rdi)
   f:	89 d1                	mov    %edx,%ecx
  11:	f3 a4                	rep movsb %ds:(%rsi),%es:(%rdi)
  13:	31 c0                	xor    %eax,%eax
  15:	0f 01 ca             	clac
  18:	c3                   	ret
  19:	8d 0c ca             	lea    (%rdx,%rcx,8),%ecx
  1c:	89 ca                	mov    %ecx,%edx
  1e:	eb 20                	jmp    0x40
  20:	0f 01 cb             	stac
  23:	83 fa 40             	cmp    $0x40,%edx
  26:	72 38                	jb     0x60
  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:	89 ca                	mov    %ecx,%edx
  34:	eb 0a                	jmp    0x40
  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:	90                   	nop
  3f:	90                   	nop