===================================================== BUG: KMSAN: uninit-value in update_stack_state+0x1ee/0xb40 arch/x86/kernel/unwind_frame.c:202 CPU: 0 PID: 23233 Comm: syz-executor.1 Not tainted 5.8.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __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+0x1ee/0xb40 arch/x86/kernel/unwind_frame.c:202 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_v6_conn_request+0x27f/0x330 net/ipv6/tcp_ipv6.c:1162 tcp_rcv_state_process+0x2de/0x45b0 net/ipv4/tcp_input.c:6213 tcp_v6_do_rcv+0x11cb/0x1fe0 net/ipv6/tcp_ipv6.c:1474 tcp_v6_rcv+0x4967/0x5a80 net/ipv6/tcp_ipv6.c:1670 ip6_protocol_deliver_rcu+0x14a2/0x2660 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+0x2dd/0x370 net/ipv6/ip6_input.c:483 dst_input include/net/dst.h:449 [inline] ip6_rcv_finish+0x5fc/0x7f0 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:307 [inline] ipv6_rcv+0x3bb/0x460 net/ipv6/ip6_input.c:307 __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 __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:virt_to_page_or_null+0x0/0xf0 mm/kmsan/kmsan_shadow.c:128 Code: 0f af c8 48 09 d9 48 b8 00 00 00 00 80 88 ff ff e9 fd fe ff ff 31 c0 5b 41 5e 41 5f 5d c3 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 48 89 f8 48 2d 00 00 00 80 0f 83 c3 00 00 00 48 ba 00 RSP: 0018:ffff8880ba112f38 EFLAGS: 00000297 RAX: 00000000007fffc4 RBX: ffff8880ba112fb0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880ba112fb0 RBP: ffff8880ba112f58 R08: ffffea000000000f R09: ffff88812fffa000 R10: 0000000000000004 R11: 0000000000000000 R12: ffff888099e289d8 R13: 0000000000000286 R14: 0000000000000000 R15: 0000000000000000 kmsan_get_shadow_origin_ptr+0x6c/0xb0 mm/kmsan/kmsan_shadow.c:149 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 native_save_fl arch/x86/include/asm/irqflags.h:35 [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+0x107/0x1d0 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] ip6_finish_output2+0x24b4/0x2a70 net/ipv6/ip6_output.c:118 __ip6_finish_output+0x9c0/0xa90 net/ipv6/ip6_output.c:143 ip6_finish_output+0x14b/0x4b0 net/ipv6/ip6_output.c:153 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x68d/0x7f0 net/ipv6/ip6_output.c:176 dst_output include/net/dst.h:443 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ip6_xmit+0x2475/0x2b40 net/ipv6/ip6_output.c:280 inet6_csk_xmit+0x47f/0x5a0 net/ipv6/inet6_connection_sock.c:135 __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_v6_connect+0x2be8/0x2d40 net/ipv6/tcp_ipv6.c:334 __inet_stream_connect+0x14fe/0x16f0 net/ipv4/af_inet.c:658 inet_stream_connect+0x101/0x180 net/ipv4/af_inet.c:722 __sys_connect_file net/socket.c:1854 [inline] __sys_connect+0x7a3/0x8a0 net/socket.c:1871 __do_sys_connect net/socket.c:1882 [inline] __se_sys_connect+0x8d/0xb0 net/socket.c:1879 __ia32_sys_connect+0x4a/0x70 net/socket.c:1879 do_syscall_32_irqs_on arch/x86/entry/common.c:430 [inline] __do_fast_syscall_32+0x2af/0x480 arch/x86/entry/common.c:477 do_fast_syscall_32+0x6b/0xd0 arch/x86/entry/common.c:505 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:554 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f0f549 Code: Bad RIP value. RSP: 002b:00000000f77090cc EFLAGS: 00000296 ORIG_RAX: 000000000000016a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000000 RDX: 000000000000001c RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Local variable ----acpar@ip6t_do_table created at: ip6t_do_table+0xc7/0x2f20 net/ipv6/netfilter/ip6_tables.c:263 ip6t_do_table+0xc7/0x2f20 net/ipv6/netfilter/ip6_tables.c:263 =====================================================