================================================================== BUG: KMSAN: uninit-value in ebt_stp_mt_check+0x24b/0x460 net/bridge/netfilter/ebt_stp.c:162 CPU: 0 PID: 7610 Comm: syz-executor6 Not tainted 4.17.0-rc5+ #103 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+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x149/0x260 mm/kmsan/kmsan.c:1084 __msan_warning_32+0x6e/0xc0 mm/kmsan/kmsan_instr.c:686 ebt_stp_mt_check+0x24b/0x460 net/bridge/netfilter/ebt_stp.c:162 xt_check_match+0x13fb/0x1610 net/netfilter/x_tables.c:500 ebt_check_match net/bridge/netfilter/ebtables.c:372 [inline] ebt_check_entry net/bridge/netfilter/ebtables.c:702 [inline] translate_table+0x4bb5/0x60f0 net/bridge/netfilter/ebtables.c:943 do_replace_finish+0x1258/0x2ea0 net/bridge/netfilter/ebtables.c:999 do_replace+0x719/0x780 net/bridge/netfilter/ebtables.c:1138 do_ebt_set_ctl+0x2ab/0x3c0 net/bridge/netfilter/ebtables.c:1517 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x476/0x4d0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x24b/0x2b0 net/ipv4/ip_sockglue.c:1253 tcp_setsockopt+0x1bb/0x1f0 net/ipv4/tcp.c:2891 sock_common_setsockopt+0x136/0x170 net/core/sock.c:3039 __sys_setsockopt+0x4af/0x560 net/socket.c:1903 __do_sys_setsockopt net/socket.c:1914 [inline] __se_sys_setsockopt net/socket.c:1911 [inline] __x64_sys_setsockopt+0x15c/0x1c0 net/socket.c:1911 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x455a09 RSP: 002b:00007f4ed8175c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f4ed81766d4 RCX: 0000000000455a09 RDX: 0000000000000080 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000000000348 R09: 0000000000000000 R10: 0000000020000340 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000005f4 R14: 00000000006fdf80 R15: 0000000000000000 Local variable description: ----mtpar.i@translate_table Variable was created at: translate_table+0xbc/0x60f0 net/bridge/netfilter/ebtables.c:831 do_replace_finish+0x1258/0x2ea0 net/bridge/netfilter/ebtables.c:999 ==================================================================