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BUG: KMSAN: uninit-value in update_stack_state+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
CPU: 1 PID: 21 Comm: kworker/u4:1 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: krdsd rds_connect_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1df/0x240 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 update_stack_state+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
 unwind_next_frame+0x8c6/0xed0 arch/x86/kernel/unwind_frame.c:305
 arch_stack_walk+0x33e/0x3e0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:123
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline]
 kmsan_internal_chain_origin+0xad/0x130 mm/kmsan/kmsan.c:310
 kmsan_memcpy_memmove_metadata+0x272/0x2e0 mm/kmsan/kmsan.c:247
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:267
 __msan_memcpy+0x43/0x50 mm/kmsan/kmsan_instr.c:116
 kstrdup+0x140/0x1a0 mm/util.c:62
 security_netlbl_sid_to_secattr+0x2f3/0x5d0 security/selinux/ss/services.c:3708
 selinux_netlbl_inet_conn_request+0x126/0x520 security/selinux/netlabel.c:333
 selinux_inet_conn_request+0x580/0x620 security/selinux/hooks.c:5372
 security_inet_conn_request+0x111/0x200 security/security.c:2215
 tcp_conn_request+0x1b23/0x4d10 net/ipv4/tcp_input.c:6676
 tcp_v6_conn_request+0x242/0x2d0 net/ipv6/tcp_ipv6.c:1162
 tcp_rcv_state_process+0x26b/0x71c0 net/ipv4/tcp_input.c:6213
 tcp_v6_do_rcv+0xed3/0x1d00 net/ipv6/tcp_ipv6.c:1474
 tcp_v6_rcv+0x4062/0x4cb0 net/ipv6/tcp_ipv6.c:1670
 ip6_protocol_deliver_rcu+0x13c3/0x22c0 net/ipv6/ip6_input.c:433
 ip6_input_finish net/ipv6/ip6_input.c:474 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip6_input+0x2af/0x340 net/ipv6/ip6_input.c:483
 dst_input include/net/dst.h:449 [inline]
 ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ipv6_rcv+0x683/0x710 net/ipv6/ip6_input.c:307
 __netif_receive_skb_one_core net/core/dev.c:5281 [inline]
 __netif_receive_skb net/core/dev.c:5395 [inline]
 process_backlog+0x72c/0x14e0 net/core/dev.c:6239
 napi_poll net/core/dev.c:6684 [inline]
 net_rx_action+0x746/0x1aa0 net/core/dev.c:6752
 __do_softirq+0x311/0x83d kernel/softirq.c:293
 asm_call_on_stack+0x12/0x20 arch/x86/entry/entry_64.S:711
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:23 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:50 [inline]
 do_softirq_own_stack+0x7c/0xa0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:390 [inline]
 __irq_exit_rcu+0x226/0x270 kernel/softirq.c:420
 irq_exit_rcu+0xe/0x10 kernel/softirq.c:432
 sysvec_call_function_single+0x107/0x130 arch/x86/kernel/smp.c:243
 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:601
RIP: 0010:__msan_poison_alloca+0x0/0x120 mm/kmsan/kmsan_instr.c:172
Code: 2e ff 4c 89 7d e0 ff 75 e0 9d 89 d8 48 83 c4 10 5b 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 ea 03 0a ad 31 c0 e8 f5 f7 44 ff 0f 1f 00 <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 f0 48 83 ec 50 80
RSP: 0018:ffff9f5000d0ae70 EFLAGS: 00000202
RAX: 0000000080000008 RBX: ffff9f5000d0ae88 RCX: ffff9277adfc1e80
RDX: ffffffffad68adf0 RSI: 0000000000000008 RDI: ffff9f5000d0ae88
RBP: ffff9f5000d0aec0 R08: ffffdfccc000000f R09: ffff9277afffb000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff9277adfc2858
R13: 0000000000000200 R14: 0000000000000000 R15: 0000000000000000
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip6_finish_output2+0x2111/0x2620 net/ipv6/ip6_output.c:118
 __ip6_finish_output+0x824/0x8e0 net/ipv6/ip6_output.c:143
 ip6_finish_output+0x166/0x410 net/ipv6/ip6_output.c:153
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x60a/0x770 net/ipv6/ip6_output.c:176
 dst_output include/net/dst.h:443 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip6_xmit+0x1f67/0x2710 net/ipv6/ip6_output.c:280
 inet6_csk_xmit+0x42b/0x570 net/ipv6/inet6_connection_sock.c:135
 __tcp_transmit_skb+0x440e/0x6090 net/ipv4/tcp_output.c:1240
 tcp_transmit_skb net/ipv4/tcp_output.c:1256 [inline]
 tcp_connect+0x4208/0x6830 net/ipv4/tcp_output.c:3673
 tcp_v6_connect+0x259c/0x2780 net/ipv6/tcp_ipv6.c:334
 __inet_stream_connect+0x2fb/0x1340 net/ipv4/af_inet.c:658
 inet_stream_connect+0x101/0x180 net/ipv4/af_inet.c:722
 rds_tcp_conn_path_connect+0x8a7/0xb70 net/rds/tcp_connect.c:172
 rds_connect_worker+0x2a6/0x470 net/rds/threads.c:176
 process_one_work+0x1540/0x1f30 kernel/workqueue.c:2269
 worker_thread+0xed2/0x23f0 kernel/workqueue.c:2415
 kthread+0x515/0x550 kernel/kthread.c:292
 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:293

Local variable ----ad@selinux_ip_postroute created at:
 selinux_ip_postroute+0xe2/0x1c90 security/selinux/hooks.c:5691
 selinux_ip_postroute+0xe2/0x1c90 security/selinux/hooks.c:5691
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