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BUG: KMSAN: uninit-value in update_stack_state+0x974/0xb40 arch/x86/kernel/unwind_frame.c:238
CPU: 1 PID: 21306 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+0x21c/0x280 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+0x338/0x3d0 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+0x29b/0x620 security/selinux/ss/services.c:3708
 selinux_netlbl_inet_conn_request+0x158/0x610 security/selinux/netlabel.c:333
 selinux_inet_conn_request+0x640/0x6e0 security/selinux/hooks.c:5372
 security_inet_conn_request+0x10c/0x210 security/security.c:2215
 tcp_conn_request+0x1e00/0x4c30 net/ipv4/tcp_input.c:6676
 tcp_v4_conn_request+0x201/0x290 net/ipv4/tcp_ipv4.c:1473
 tcp_v6_conn_request+0xeb/0x330 net/ipv6/tcp_ipv6.c:1157
 tcp_rcv_state_process+0x2de/0x45b0 net/ipv4/tcp_input.c:6213
 tcp_v4_do_rcv+0xbfc/0xff0 net/ipv4/tcp_ipv4.c:1663
 tcp_v4_rcv+0x4ad1/0x5c10 net/ipv4/tcp_ipv4.c:2011
 ip_protocol_deliver_rcu+0x572/0xc50 net/ipv4/ip_input.c:204
 ip_local_deliver_finish net/ipv4/ip_input.c:231 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_local_deliver+0x727/0x8d0 net/ipv4/ip_input.c:252
 dst_input include/net/dst.h:449 [inline]
 ip_rcv_finish net/ipv4/ip_input.c:428 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip_rcv+0x795/0x810 net/ipv4/ip_input.c:539
 __netif_receive_skb_one_core net/core/dev.c:5281 [inline]
 __netif_receive_skb+0x265/0x670 net/core/dev.c:5395
 process_backlog+0x50d/0xba0 net/core/dev.c:6239
 napi_poll+0x43b/0xfd0 net/core/dev.c:6684
 net_rx_action+0x35c/0xd40 net/core/dev.c:6752
 __do_softirq+0x2ea/0x7f5 kernel/softirq.c:293
 asm_call_on_stack+0xf/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+0xe3/0x120 mm/kmsan/kmsan_instr.c:191
Code: 00 e8 21 fe b2 03 65 44 0f c1 3d 48 29 cc 7d 41 ff cf 75 34 89 c3 e8 0c d5 14 ff 48 8b 44 24 08 48 89 44 24 10 ff 74 24 10 9d <4c> 89 e7 44 89 f6 89 da e8 10 f5 ff ff 48 8d 65 d8 5b 41 5c 41 5d
RSP: 0018:ffff8880300f6e70 EFLAGS: 00000246
RAX: 0000000000000246 RBX: 0000000006d30008 RCX: ffffffff81693fda
RDX: 0000000000000a20 RSI: 0000000000093380 RDI: 0000000003bb34cf
RBP: ffff8880300f6ee8 R08: 0000000000000002 R09: ffff8880300f6ea8
R10: 0000000000000004 R11: ffff8880354f0000 R12: ffff8880300f6f08
R13: 0000000000000001 R14: 0000000000000008 R15: 0000000000000000
 native_save_fl kernel/softirq.c:169 [inline]
 arch_local_save_flags arch/x86/include/asm/irqflags.h:79 [inline]
 arch_local_irq_save arch/x86/include/asm/irqflags.h:120 [inline]
 do_softirq kernel/softirq.c:333 [inline]
 __local_bh_enable_ip+0xea/0x1d0 kernel/softirq.c:190
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:723 [inline]
 ip_finish_output2+0x2459/0x2930 net/ipv4/ip_output.c:229
 __ip_finish_output+0xeb5/0xfd0 net/ipv4/ip_output.c:306
 ip_finish_output+0x14b/0x4b0 net/ipv4/ip_output.c:316
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip_output+0x5f2/0x6e0 net/ipv4/ip_output.c:430
 dst_output include/net/dst.h:443 [inline]
 ip_local_out net/ipv4/ip_output.c:125 [inline]
 __ip_queue_xmit+0x1eac/0x23c0 net/ipv4/ip_output.c:530
 ip_queue_xmit+0xcc/0xf0 include/net/ip.h:237
 __tcp_transmit_skb+0x4b9e/0x5d70 net/ipv4/tcp_output.c:1240
 tcp_transmit_skb net/ipv4/tcp_output.c:1256 [inline]
 tcp_connect+0x153f/0x3bb0 net/ipv4/tcp_output.c:3673
 tcp_v4_connect+0x2532/0x26c0 net/ipv4/tcp_ipv4.c:311
 __inet_stream_connect+0x14fe/0x16f0 net/ipv4/af_inet.c:658
 inet_stream_connect+0x101/0x180 net/ipv4/af_inet.c:722
 rds_tcp_conn_path_connect+0x93d/0xcc0 net/rds/tcp_connect.c:172
 rds_connect_worker+0x36b/0x550 net/rds/threads.c:176
 process_one_work+0x1688/0x2140 kernel/workqueue.c:2269
 worker_thread+0x10bc/0x2730 kernel/workqueue.c:2415
 kthread+0x551/0x590 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Local variable ----ad@selinux_ip_postroute created at:
 selinux_ip_postroute+0xee/0x22b0 security/selinux/hooks.c:5691
 selinux_ip_postroute+0xee/0x22b0 security/selinux/hooks.c:5691
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