================================================================== BUG: KMSAN: uninit-value in ip6_compressed_string+0x1a9/0x1460 lib/vsprintf.c:1161 CPU: 1 PID: 21380 Comm: syz-executor5 Not tainted 4.20.0-rc3+ #93 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Sensor A: ================= START STATUS ================= Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x32d/0x480 lib/dump_stack.c:113 kmsan_report+0x19f/0x300 mm/kmsan/kmsan.c:831 __msan_warning+0x76/0xc0 mm/kmsan/kmsan_instr.c:410 Sensor A: Test Pattern: 75% Colorbar ip6_compressed_string+0x1a9/0x1460 lib/vsprintf.c:1161 Sensor A: Vertical Flip: false Sensor A: Horizontal Flip: false ip6_addr_string+0x165/0x2b0 lib/vsprintf.c:1247 Sensor A: Brightness: 128 pointer+0x110e/0x1520 lib/vsprintf.c:1911 vsnprintf+0xabf/0x3110 lib/vsprintf.c:2300 Sensor A: Contrast: 128 snprintf+0x246/0x290 lib/vsprintf.c:2429 Sensor A: Hue: 0 rpc_ntop6_noscopeid net/sunrpc/addr.c:56 [inline] rpc_sockaddr2uaddr+0x3aa/0x6f0 net/sunrpc/addr.c:281 rpcb_getport_async+0x10d4/0x1770 net/sunrpc/rpcb_clnt.c:773 Sensor A: Saturation: 128 Sensor A: ================== END STATUS ================== call_bind+0x1a8/0x260 net/sunrpc/clnt.c:1802 __rpc_execute+0xacb/0x19c0 net/sunrpc/sched.c:832 rpc_execute+0x6ad/0x940 net/sunrpc/sched.c:900 rpc_run_task+0xc42/0xe70 net/sunrpc/clnt.c:1065 rpc_call_sync net/sunrpc/clnt.c:1094 [inline] rpc_ping net/sunrpc/clnt.c:2516 [inline] rpc_create_xprt+0x6a9/0xe80 net/sunrpc/clnt.c:480 rpc_create+0xa78/0xb30 net/sunrpc/clnt.c:588 nfs_create_rpc_client+0x752/0x860 fs/nfs/client.c:523 nfs_init_client+0xb8/0x1d0 fs/nfs/client.c:634 nfs_get_client+0x14fc/0x1720 fs/nfs/client.c:425 nfs_init_server fs/nfs/client.c:670 [inline] nfs_create_server+0xbd7/0x3290 fs/nfs/client.c:954 nfs_try_mount+0x4de/0x14b0 fs/nfs/super.c:1884 nfs_fs_mount+0x393d/0x4000 fs/nfs/super.c:2695 mount_fs+0x282/0x790 fs/super.c:1261 vfs_kern_mount+0x231/0x8c0 fs/namespace.c:961 do_new_mount fs/namespace.c:2469 [inline] do_mount+0xd1f/0x5ac0 fs/namespace.c:2801 ksys_mount+0x32e/0x3d0 fs/namespace.c:3017 __do_sys_mount fs/namespace.c:3031 [inline] __se_sys_mount+0xe5/0x110 fs/namespace.c:3028 __x64_sys_mount+0x62/0x80 fs/namespace.c:3028 do_syscall_64+0xcf/0x110 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457569 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:00007f9a8dba6c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569 RDX: 0000000020000180 RSI: 0000000020000140 RDI: 00000000200001c0 RBP: 000000000072bf00 R08: 000000002000a000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9a8dba76d4 R13: 00000000004c2bcc R14: 00000000004d48e8 R15: 00000000ffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:258 [inline] kmsan_save_stack mm/kmsan/kmsan.c:273 [inline] kmsan_internal_chain_origin+0x13d/0x240 mm/kmsan/kmsan.c:486 kmsan_memcpy_memmove_metadata+0x1a9/0xf70 mm/kmsan/kmsan.c:357 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:375 __msan_memcpy+0x61/0x70 mm/kmsan/kmsan_instr.c:236 ip6_compressed_string+0x89/0x1460 lib/vsprintf.c:1154 ip6_addr_string+0x165/0x2b0 lib/vsprintf.c:1247 pointer+0x110e/0x1520 lib/vsprintf.c:1911 vsnprintf+0xabf/0x3110 lib/vsprintf.c:2300 snprintf+0x246/0x290 lib/vsprintf.c:2429 rpc_ntop6_noscopeid net/sunrpc/addr.c:56 [inline] rpc_sockaddr2uaddr+0x3aa/0x6f0 net/sunrpc/addr.c:281 rpcb_getport_async+0x10d4/0x1770 net/sunrpc/rpcb_clnt.c:773 call_bind+0x1a8/0x260 net/sunrpc/clnt.c:1802 __rpc_execute+0xacb/0x19c0 net/sunrpc/sched.c:832 rpc_execute+0x6ad/0x940 net/sunrpc/sched.c:900 rpc_run_task+0xc42/0xe70 net/sunrpc/clnt.c:1065 rpc_call_sync net/sunrpc/clnt.c:1094 [inline] rpc_ping net/sunrpc/clnt.c:2516 [inline] rpc_create_xprt+0x6a9/0xe80 net/sunrpc/clnt.c:480 rpc_create+0xa78/0xb30 net/sunrpc/clnt.c:588 nfs_create_rpc_client+0x752/0x860 fs/nfs/client.c:523 nfs_init_client+0xb8/0x1d0 fs/nfs/client.c:634 nfs_get_client+0x14fc/0x1720 fs/nfs/client.c:425 nfs_init_server fs/nfs/client.c:670 [inline] nfs_create_server+0xbd7/0x3290 fs/nfs/client.c:954 nfs_try_mount+0x4de/0x14b0 fs/nfs/super.c:1884 nfs_fs_mount+0x393d/0x4000 fs/nfs/super.c:2695 mount_fs+0x282/0x790 fs/super.c:1261 vfs_kern_mount+0x231/0x8c0 fs/namespace.c:961 do_new_mount fs/namespace.c:2469 [inline] do_mount+0xd1f/0x5ac0 fs/namespace.c:2801 ksys_mount+0x32e/0x3d0 fs/namespace.c:3017 __do_sys_mount fs/namespace.c:3031 [inline] __se_sys_mount+0xe5/0x110 fs/namespace.c:3028 __x64_sys_mount+0x62/0x80 fs/namespace.c:3028 do_syscall_64+0xcf/0x110 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+0xb3/0x1770 net/sunrpc/rpcb_clnt.c:673 call_bind+0x1a8/0x260 net/sunrpc/clnt.c:1802 ==================================================================