------------[ cut here ]------------
WARNING: CPU: 0 PID: 4275 at net/core/flow_dissector.c:1027 __skb_flow_dissect+0xade/0x6d50 net/core/flow_dissector.c:1022
Modules linked in:
CPU: 0 PID: 4275 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__skb_flow_dissect+0xade/0x6d50 net/core/flow_dissector.c:1027
Code: c6 e8 06 ca 4d f9 85 db 0f 84 5b 06 00 00 80 3d a8 cb d7 05 01 0f 85 81 06 00 00 e8 8c c6 4d f9 e9 e7 f9 ff ff e8 82 c6 4d f9 <0f> 0b e8 db 21 fe 01 89 c3 31 ff 89 c6 e8 d0 c9 4d f9 85 db 74 18
RSP: 0018:ffffc90000006800 EFLAGS: 00010246
RAX: ffffffff88346c5e RBX: 0000000000000000 RCX: ffff88802f0dbc00
RDX: 0000000000000100 RSI: ffffffff8adf6880 RDI: ffffffff8adf6840
RBP: ffffc90000006dc8 R08: dffffc0000000000 R09: 1ffffffff2161e48
R10: dffffc0000000000 R11: fffffbfff2161e49 R12: ffffffff8e2125bc
R13: 1ffffffff1c424b8 R14: ffffffff8e2125c2 R15: dffffc0000000000
FS:  000055558225b500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555582276a38 CR3: 000000005c590000 CR4: 00000000003506f0
DR0: 0000000000010000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 skb_flow_dissect_flow_keys include/linux/skbuff.h:1531 [inline]
 ___skb_get_hash+0x55/0x6e0 net/core/flow_dissector.c:1713
 __skb_get_hash+0xd2/0x270 net/core/flow_dissector.c:1778
 skb_get_hash include/linux/skbuff.h:1573 [inline]
 nft_trace_init+0x1e0/0x430 net/netfilter/nf_tables_trace.c:292
 nft_do_chain+0x1612/0x16d0 net/netfilter/nf_tables_core.c:243
 nft_do_chain_ipv4+0x156/0x220 net/netfilter/nft_chain_filter.c:23
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xb9/0x200 net/netfilter/core.c:614
 nf_hook+0x224/0x390 include/linux/netfilter.h:257
 __ip_local_out+0x49c/0x5d0 net/ipv4/ip_output.c:115
 ip_local_out+0x26/0x120 net/ipv4/ip_output.c:124
 iptunnel_xmit+0x4a1/0x880 net/ipv4/ip_tunnel_core.c:82
 udp_tunnel_xmit_skb+0x22b/0x380 net/ipv4/udp_tunnel_core.c:172
 tipc_udp_xmit+0x85d/0xb40 net/tipc/udp_media.c:198
 tipc_udp_send_msg+0x27a/0x3e0 net/tipc/udp_media.c:271
 tipc_bearer_xmit_skb+0x2a9/0x3f0 net/tipc/bearer.c:578
 tipc_disc_timeout+0x5e1/0x740 net/tipc/discover.c:340
 call_timer_fn+0x1ac/0x670 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x56c/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:lock_acquire+0x225/0x4a0 kernel/locking/lockdep.c:5682
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04
RSP: 0018:ffffc90003e774c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 59efdfed23a93800
RDX: 0000000000000000 RSI: ffffffff8a8c2a20 RDI: ffffffff8adf68a0
RBP: ffffc90003e775d8 R08: dffffc0000000000 R09: 1ffffffff2161e5c
R10: dffffc0000000000 R11: fffffbfff2161e5d R12: 0000000000000000
R13: 1ffff920007ceea4 R14: 0000000000000246 R15: dffffc0000000000
 down_write+0x36/0x60 kernel/locking/rwsem.c:1573
 inode_lock include/linux/fs.h:764 [inline]
 process_measurement+0x3af/0x1c40 security/integrity/ima/ima_main.c:242
 ima_file_check+0xc8/0x110 security/integrity/ima/ima_main.c:534
 do_open fs/namei.c:3679 [inline]
 path_openat+0x272b/0x2f10 fs/namei.c:3834
 do_filp_open+0x1ee/0x420 fs/namei.c:3861
 do_sys_openat2+0x14b/0x4f0 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1347
 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: 0033:0x7fcfbe35e98e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007ffcaaf08f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055558225b500 RCX: 00007fcfbe35e98e
RDX: 0000000000000000 RSI: 00007ffcaaf090d0 RDI: ffffffffffffff9c
RBP: 00007ffcaaf0907c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000006fc
R13: 00000000000927c0 R14: 00000000000e6f9e R15: 00007ffcaaf090d0
 </TASK>
----------------
Code disassembly (best guess):
   0:	f7 84 24 80 00 00 00 	testl  $0x200,0x80(%rsp)
   7:	00 02 00 00
   b:	43 c6 44 3d 04 f8    	movb   $0xf8,0x4(%r13,%r15,1)
  11:	0f 85 f0 00 00 00    	jne    0x107
  17:	41 f7 c6 00 02 00 00 	test   $0x200,%r14d
  1e:	74 01                	je     0x21
  20:	fb                   	sti
  21:	48 c7 44 24 60 0e 36 	movq   $0x45e0360e,0x60(%rsp)
  28:	e0 45
* 2a:	4b c7 44 3d 00 00 00 	movq   $0x0,0x0(%r13,%r15,1) <-- trapping instruction
  31:	00 00
  33:	43 c7 44 3d 08 00 00 	movl   $0x0,0x8(%r13,%r15,1)
  3a:	00 00
  3c:	65                   	gs
  3d:	48                   	rex.W
  3e:	8b                   	.byte 0x8b
  3f:	04                   	.byte 0x4