On Tue, Dec 11, 2018 at 1:41 AM syzbot <syzbot+c56449ed3652e6720...@syzkaller.appspotmail.com> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 3f06bda61398 kmsan: remove excessive KMSAN wrappers from a.. > git tree: https://github.com/google/kmsan.git/master > console output: https://syzkaller.appspot.com/x/log.txt?x=13ca6b05400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=9b071100dcf8e641 > dashboard link: https://syzkaller.appspot.com/bug?extid=c56449ed3652e6720f30 > compiler: clang version 8.0.0 (trunk 348261) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+c56449ed3652e6720...@syzkaller.appspotmail.com
This looks like a bug in TIPC, +TIPC maintainers. > Started in network mode > Own node identity fe8000000000000000000000000000bb, cluster identity 4711 > ================================================================== > BUG: KMSAN: uninit-value in __inet6_bind+0xb72/0x1ad0 > net/ipv6/af_inet6.c:340 > CPU: 0 PID: 8376 Comm: syz-executor3 Not tainted 4.20.0-rc5+ #111 > 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+0x284/0x3b0 lib/dump_stack.c:113 > kmsan_report+0x12d/0x290 mm/kmsan/kmsan.c:684 > __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:316 > __inet6_bind+0xb72/0x1ad0 net/ipv6/af_inet6.c:340 > inet6_bind+0x27f/0x390 net/ipv6/af_inet6.c:441 > kernel_bind+0xc6/0xf0 net/socket.c:3230 > udp_sock_create6+0x2ee/0x890 net/ipv6/ip6_udp_tunnel.c:39 > udp_sock_create include/net/udp_tunnel.h:61 [inline] > tipc_udp_enable+0x166f/0x1d70 net/tipc/udp_media.c:742 > tipc_enable_bearer net/tipc/bearer.c:302 [inline] > __tipc_nl_bearer_enable+0x1213/0x1da0 net/tipc/bearer.c:897 > tipc_nl_bearer_enable+0x6c/0xb0 net/tipc/bearer.c:905 > genl_family_rcv_msg net/netlink/genetlink.c:601 [inline] > genl_rcv_msg+0x185f/0x1a60 net/netlink/genetlink.c:626 > netlink_rcv_skb+0x444/0x640 net/netlink/af_netlink.c:2477 > genl_rcv+0x63/0x80 net/netlink/genetlink.c:637 > netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] > netlink_unicast+0xfc5/0x10a0 net/netlink/af_netlink.c:1336 > netlink_sendmsg+0x1298/0x13e0 net/netlink/af_netlink.c:1917 > sock_sendmsg_nosec net/socket.c:621 [inline] > sock_sendmsg net/socket.c:631 [inline] > ___sys_sendmsg+0xdbc/0x11d0 net/socket.c:2116 > __sys_sendmsg net/socket.c:2154 [inline] > __do_sys_sendmsg net/socket.c:2163 [inline] > __se_sys_sendmsg+0x305/0x460 net/socket.c:2161 > __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2161 > do_syscall_64+0xcd/0x110 arch/x86/entry/common.c:291 > entry_SYSCALL_64_after_hwframe+0x63/0xe7 > RIP: 0033:0x457659 > Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 > 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff > ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f82ebc52c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457659 > RDX: 0000000000000000 RSI: 00000000200008c0 RDI: 0000000000000003 > RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f82ebc536d4 > R13: 00000000004c421b R14: 00000000004d7160 R15: 00000000ffffffff > > Local variable description: ----udp6_addr@udp_sock_create6 > Variable was created at: > udp_sock_create6+0x80/0x890 net/ipv6/ip6_udp_tunnel.c:17 > udp_sock_create include/net/udp_tunnel.h:61 [inline] > tipc_udp_enable+0x166f/0x1d70 net/tipc/udp_media.c:742 > ================================================================== > > > --- > This bug is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkal...@googlegroups.com. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with > syzbot. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/0000000000001568af057cb456a8%40google.com. > For more options, visit https://groups.google.com/d/optout.
