================================================================== BUG: KMSAN: uninit-value in ip6_compressed_string+0x1de/0x1490 lib/vsprintf.c:1174 CPU: 1 PID: 13884 Comm: syz-executor.3 Not tainted 5.1.0-rc4+ #1 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+0x173/0x1d0 lib/dump_stack.c:113 kmsan_report+0x131/0x2a0 mm/kmsan/kmsan.c:619 __msan_warning+0x7a/0xf0 mm/kmsan/kmsan_instr.c:310 ip6_compressed_string+0x1de/0x1490 lib/vsprintf.c:1174 ip6_addr_string+0x165/0x2b0 lib/vsprintf.c:1263 pointer+0x10f2/0x1660 lib/vsprintf.c:2009 vsnprintf+0x1c24/0x3230 lib/vsprintf.c:2400 snprintf+0x246/0x290 lib/vsprintf.c:2529 rpc_ntop6_noscopeid net/sunrpc/addr.c:56 [inline] rpc_sockaddr2uaddr+0x4ec/0x730 net/sunrpc/addr.c:281 rpcb_getport_async+0xfbe/0x1790 net/sunrpc/rpcb_clnt.c:773 call_bind net/sunrpc/clnt.c:1879 [inline] call_encode+0xba0/0x1650 net/sunrpc/clnt.c:1832 call_allocate+0x1a5/0x920 net/sunrpc/clnt.c:1715 call_refreshresult+0x15d/0x580 net/sunrpc/clnt.c:1669 call_refresh net/sunrpc/clnt.c:1650 [inline] call_reserveresult+0x6b8/0x740 net/sunrpc/clnt.c:1582 call_reserve net/sunrpc/clnt.c:1559 [inline] call_start+0x73c/0x790 net/sunrpc/clnt.c:1543 __rpc_execute+0x968/0x1610 net/sunrpc/sched.c:832 rpc_execute+0x437/0x6d0 net/sunrpc/sched.c:900 rpc_run_task+0x8b8/0xbb0 net/sunrpc/clnt.c:1062 rpc_call_sync net/sunrpc/clnt.c:1091 [inline] rpc_ping net/sunrpc/clnt.c:2609 [inline] rpc_create_xprt+0x5a3/0xd50 net/sunrpc/clnt.c:479 rpc_create+0xaa6/0xb30 net/sunrpc/clnt.c:587 nfs_create_rpc_client+0x723/0x920 fs/nfs/client.c:517 nfs_init_client+0xb8/0x1d0 fs/nfs/client.c:629 nfs_get_client+0x1487/0x16a0 fs/nfs/client.c:419 nfs_init_server fs/nfs/client.c:665 [inline] nfs_create_server+0xb9a/0x3550 fs/nfs/client.c:949 nfs3_create_server+0x70/0x370 fs/nfs/nfs3client.c:51 nfs_try_mount+0x1134/0x1550 fs/nfs/super.c:1818 nfs_fs_mount+0x36b2/0x3a70 fs/nfs/super.c:2691 legacy_get_tree+0x163/0x2d0 fs/fs_context.c:584 vfs_get_tree+0x1ae/0x810 fs/super.c:1481 do_new_mount fs/namespace.c:2622 [inline] do_mount+0x31d4/0x65f0 fs/namespace.c:2942 ksys_mount+0x32e/0x3d0 fs/namespace.c:3151 __do_sys_mount fs/namespace.c:3165 [inline] __se_sys_mount+0xe5/0x110 fs/namespace.c:3162 __x64_sys_mount+0x62/0x80 fs/namespace.c:3162 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x458da9 Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f00117bdc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458da9 RDX: 000000002015bffc RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 000000000073bf00 R08: 0000000020000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f00117be6d4 R13: 00000000004c4da1 R14: 00000000004d8a08 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:205 [inline] kmsan_save_stack mm/kmsan/kmsan.c:220 [inline] kmsan_internal_chain_origin+0x134/0x230 mm/kmsan/kmsan.c:426 kmsan_memcpy_memmove_metadata+0x989/0xd60 mm/kmsan/kmsan.c:304 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:324 __msan_memcpy+0x58/0x70 mm/kmsan/kmsan_instr.c:139 ip6_compressed_string+0xbe/0x1490 lib/vsprintf.c:1170 ip6_addr_string+0x165/0x2b0 lib/vsprintf.c:1263 pointer+0x10f2/0x1660 lib/vsprintf.c:2009 vsnprintf+0x1c24/0x3230 lib/vsprintf.c:2400 snprintf+0x246/0x290 lib/vsprintf.c:2529 rpc_ntop6_noscopeid net/sunrpc/addr.c:56 [inline] rpc_sockaddr2uaddr+0x4ec/0x730 net/sunrpc/addr.c:281 rpcb_getport_async+0xfbe/0x1790 net/sunrpc/rpcb_clnt.c:773 call_bind net/sunrpc/clnt.c:1879 [inline] call_encode+0xba0/0x1650 net/sunrpc/clnt.c:1832 call_allocate+0x1a5/0x920 net/sunrpc/clnt.c:1715 call_refreshresult+0x15d/0x580 net/sunrpc/clnt.c:1669 call_refresh net/sunrpc/clnt.c:1650 [inline] call_reserveresult+0x6b8/0x740 net/sunrpc/clnt.c:1582 call_reserve net/sunrpc/clnt.c:1559 [inline] call_start+0x73c/0x790 net/sunrpc/clnt.c:1543 __rpc_execute+0x968/0x1610 net/sunrpc/sched.c:832 rpc_execute+0x437/0x6d0 net/sunrpc/sched.c:900 rpc_run_task+0x8b8/0xbb0 net/sunrpc/clnt.c:1062 rpc_call_sync net/sunrpc/clnt.c:1091 [inline] rpc_ping net/sunrpc/clnt.c:2609 [inline] rpc_create_xprt+0x5a3/0xd50 net/sunrpc/clnt.c:479 rpc_create+0xaa6/0xb30 net/sunrpc/clnt.c:587 nfs_create_rpc_client+0x723/0x920 fs/nfs/client.c:517 nfs_init_client+0xb8/0x1d0 fs/nfs/client.c:629 nfs_get_client+0x1487/0x16a0 fs/nfs/client.c:419 nfs_init_server fs/nfs/client.c:665 [inline] nfs_create_server+0xb9a/0x3550 fs/nfs/client.c:949 nfs3_create_server+0x70/0x370 fs/nfs/nfs3client.c:51 nfs_try_mount+0x1134/0x1550 fs/nfs/super.c:1818 nfs_fs_mount+0x36b2/0x3a70 fs/nfs/super.c:2691 legacy_get_tree+0x163/0x2d0 fs/fs_context.c:584 vfs_get_tree+0x1ae/0x810 fs/super.c:1481 do_new_mount fs/namespace.c:2622 [inline] do_mount+0x31d4/0x65f0 fs/namespace.c:2942 ksys_mount+0x32e/0x3d0 fs/namespace.c:3151 __do_sys_mount fs/namespace.c:3165 [inline] __se_sys_mount+0xe5/0x110 fs/namespace.c:3162 __x64_sys_mount+0x62/0x80 fs/namespace.c:3162 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Local variable description: ----addr@rpcb_getport_async Variable was created at: rpcb_getport_async+0xb3/0x1790 net/sunrpc/rpcb_clnt.c:673 call_bind net/sunrpc/clnt.c:1879 [inline] call_encode+0xba0/0x1650 net/sunrpc/clnt.c:1832 ==================================================================