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Memory issue #36

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benoitblin opened this issue Feb 19, 2018 · 11 comments
Open

Memory issue #36

benoitblin opened this issue Feb 19, 2018 · 11 comments
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@mathiask88

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@benoitblin
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Thanks for this great wrapper. I use the client to read periodically DBs of PLCs in a loop. Unfortunately, I always have a memory issue after a random time (Ubuntu 16.04 platform, Node.JS v8.9.0), like :

  • Error in `node': double free or corruption (out): 0x00000000039d6a20
    or :
  • Error in `node': free(): invalid pointer: 0x0000000002e938a0

May it be a bug ? Or bad design of my app ?

Here an example of one of this trace :
*** Error in `node': free(): invalid pointer: 0x0000000002e938a0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7fb649f587e5]
/lib/x86_64-linux-gnu/libc.so.6(+0x8037a)[0x7fb649f6137a]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7fb649f6553c]
/path/to/my/app/node_modules/node-snap7/build/Release/node_snap7.node(_ZN10node_snap78IOWorker16HandleOKCallbackEv+0x398)[0x7fb645a8b508] /path/to/my/app/node_modules/node-snap7/build/Release/node_snap7.node(_ZN3Nan11AsyncWorker12WorkCompleteEv+0x83)[0x7fb645a8f8f3]
/path/to/my/app/node_modules/node-snap7/build/Release/node_snap7.node(_ZN3Nan20AsyncExecuteCompleteEP9uv_work_s+0x15)[0x7fb645a8f7a5]
node[0x14549d5]
node[0x1456a8b]
node[0x14685e8]
node(uv_run+0x156)[0x1457416]
node(_ZN4node5StartEP9uv_loopsiPKPKciS5+0xc75)[0x122a035]
node(_ZN4node5StartEiPPc+0x163)[0x1222c93]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7fb649f01830]
node[0x8ae4c1]

======= Memory map: ========
00400000-01fa2000 r-xp 00000000 08:01 402502 /home/me/.nvm/versions/node/v8.9.0/bin/node
021a2000-021bd000 rw-p 01ba2000 08:01 402502 /home/me/.nvm/versions/node/v8.9.0/bin/node
021bd000-021d4000 rw-p 00000000 00:00 0 02c72000-034a4000 rw-p 00000000 00:00 0 [heap]
[...]
7fb645a62000-7fb645ac0000 r-xp 00000000 08:01 1072693 /path/to/my/app/node_modules/node-snap7/build/Release/node_snap7.node
7fb645ac0000-7fb645cbf000 ---p 0005e000 08:01 1072693 /path/to/my/app/node_modules/node-snap7/build/Release/node_snap7.node
7fb645cbf000-7fb645cc1000 r--p 0005d000 08:01 1072693 /path/to/my/app/node_modules/node-snap7/build/Release/node_snap7.node
7fb645cc1000-7fb645cc7000 rw-p 0005f000 08:01 1072693 /path/to/my/app/node_modules/node-snap7/build/Release/node_snap7.node
7fb645cc7000-7fb645cd2000 r-xp 00000000 08:01 786995 /lib/x86_64-linux-gnu/libnss_files-2.23.so
7fb645cd2000-7fb645ed1000 ---p 0000b000 08:01 786995 /lib/x86_64-linux-gnu/libnss_files-2.23.so
7fb645ed1000-7fb645ed2000 r--p 0000a000 08:01 786995 /lib/x86_64-linux-gnu/libnss_files-2.23.so
7fb645ed2000-7fb645ed3000 rw-p 0000b000 08:01 786995 /lib/x86_64-linux-gnu/libnss_files-2.23.so
[...]
7fb649ee1000-7fb64a0a1000 r-xp 00000000 08:01 786931 /lib/x86_64-linux-gnu/libc-2.23.so
7fb64a0a1000-7fb64a2a1000 ---p 001c0000 08:01 786931 /lib/x86_64-linux-gnu/libc-2.23.so
7fb64a2a1000-7fb64a2a5000 r--p 001c0000 08:01 786931 /lib/x86_64-linux-gnu/libc-2.23.so
7fb64a2a5000-7fb64a2a7000 rw-p 001c4000 08:01 786931 /lib/x86_64-linux-gnu/libc-2.23.so
7fb64a2a7000-7fb64a2ab000 rw-p 00000000 00:00 0
7fb64a2ab000-7fb64a2c3000 r-xp 00000000 08:01 787018 /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb64a2c3000-7fb64a4c2000 ---p 00018000 08:01 787018 /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb64a4c2000-7fb64a4c3000 r--p 00017000 08:01 787018 /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb64a4c3000-7fb64a4c4000 rw-p 00018000 08:01 787018 /lib/x86_64-linux-gnu/libpthread-2.23.so
7fb64a4c4000-7fb64a4c8000 rw-p 00000000 00:00 0
7fb64a4c8000-7fb64a4de000 r-xp 00000000 08:01 786957 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fb64a4de000-7fb64a6dd000 ---p 00016000 08:01 786957 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fb64a6dd000-7fb64a6de000 rw-p 00015000 08:01 786957 /lib/x86_64-linux-gnu/libgcc_s.so.1
7fb64a6de000-7fb64a7e6000 r-xp 00000000 08:01 786972 /lib/x86_64-linux-gnu/libm-2.23.so
7fb64a7e6000-7fb64a9e5000 ---p 00108000 08:01 786972 /lib/x86_64-linux-gnu/libm-2.23.so
7fb64a9e5000-7fb64a9e6000 r--p 00107000 08:01 786972 /lib/x86_64-linux-gnu/libm-2.23.so
7fb64a9e6000-7fb64a9e7000 rw-p 00108000 08:01 786972 /lib/x86_64-linux-gnu/libm-2.23.so
7fb64a9e7000-7fb64ab59000 r-xp 00000000 08:01 921735 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb64ab59000-7fb64ad59000 ---p 00172000 08:01 921735 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb64ad59000-7fb64ad63000 r--p 00172000 08:01 921735 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb64ad63000-7fb64ad65000 rw-p 0017c000 08:01 921735 /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.21
7fb64ad65000-7fb64ad69000 rw-p 00000000 00:00 0
7fb64ad69000-7fb64ad70000 r-xp 00000000 08:01 787024 /lib/x86_64-linux-gnu/librt-2.23.so
7fb64ad70000-7fb64af6f000 ---p 00007000 08:01 787024 /lib/x86_64-linux-gnu/librt-2.23.so
7fb64af6f000-7fb64af70000 r--p 00006000 08:01 787024 /lib/x86_64-linux-gnu/librt-2.23.so
7fb64af70000-7fb64af71000 rw-p 00007000 08:01 787024 /lib/x86_64-linux-gnu/librt-2.23.so
7fb64af71000-7fb64af74000 r-xp 00000000 08:01 786945 /lib/x86_64-linux-gnu/libdl-2.23.so
7fb64af74000-7fb64b173000 ---p 00003000 08:01 786945 /lib/x86_64-linux-gnu/libdl-2.23.so
7fb64b173000-7fb64b174000 r--p 00002000 08:01 786945 /lib/x86_64-linux-gnu/libdl-2.23.so
7fb64b174000-7fb64b175000 rw-p 00003000 08:01 786945 /lib/x86_64-linux-gnu/libdl-2.23.so
7fb64b175000-7fb64b19b000 r-xp 00000000 08:01 786907 /lib/x86_64-linux-gnu/ld-2.23.so
7fb64b39a000-7fb64b39b000 r--p 00025000 08:01 786907 /lib/x86_64-linux-gnu/ld-2.23.so
7fb64b39b000-7fb64b39c000 rw-p 00026000 08:01 786907 /lib/x86_64-linux-gnu/ld-2.23.so
7fb64b39c000-7fb64b39d000 rw-p 00000000 00:00 0
7ffd437d6000-7ffd437f7000 rw-p 00000000 00:00 0 [stack]
7ffd437fb000-7ffd437fd000 r--p 00000000 00:00 0 [vvar]
7ffd437fd000-7ffd437ff000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
@mathiask88
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Could be an issue in node-snap7 of course, but the code is kinda old and this is the first time someone got this error. Let's try to find out.. A minimal example to reproduce would be great. What function are you calling DBGet or ReadArea/ReadDB? Could you build node-snap7 from source with --debug configuration to get more infos like the actual LOC?

@mathiask88 mathiask88 self-assigned this Feb 19, 2018
@benoitblin
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benoitblin commented Feb 20, 2018 •
edited
Loading

Here is an example of my code. All 2s, I read all DBs of six 1511.
Everything is OK, but after a random time (5 minutes, 1 hour, 5 hours, ...), this code crash with error below.
I'll try to build node-snap7 with --debug.

const snap7 = require('node-snap7');

class Client
{
    constructor(host_ip)
    {
        this.s7client = new snap7.S7Client();
        this.host_ip = host_ip;
        this.connect();
    }

    /**
     * Connect to S7 server
     * @param integer time before reconnect (in ms)
     */
    connect(reconnect = 10000)
    {
        if(true == this.s7client.Connected() || null == this.host_ip) {
            return;
        }
        const self = this;
        this.s7client.ConnectTo(this.host_ip, 0, 0, function(err) {
            if(err) {
                console.error("[S7] Connection error on " + self.host_ip + " : " + self.s7client.ErrorText(err));
                setTimeout(() => self.connect(reconnect), reconnect);
            } else {
                console.log(' [*] S7 : connected to ' + self.host_ip);
            }
        });
    }

    /**
     * Update DB from S7 server
     * @param DB
     */
    update(db)
    {
        if(false == this.s7client.Connected()) {
            return;
        }
        const self = this;
        this.s7client.DBRead(db.num, 0, db.length, function (err, res) {
            if(err) {
                return;
            }
            db.buffer = res;
        });
    }
}

class DB
{
    /**
     * @param int n° of DB
     * @param int length of DB 
     */
    constructor(num, length)
    {
        this.num = num;
        this.length = length;
	this.buffer = null;
    }
    	
    /**
     * Get a part of buffer
     * @return Buffer
     */
    getBuffer(offset, length)
    {
        return this.buffer.slice(offset, offset + length);
    }
}

// Init DB objects
const dbs = new Map();
dbs.set(1, [ 
  new DB(6, 154), 
  new DB(16, 98), 
  new DB(1001, 34), 
  new DB(1003, 20000), 
  new DB(1004, 10000), 
  new DB(1005, 448), 
  new DB(1006, 327), 
  new DB(1030, 148), 
  new DB(1031, 12), 
  new DB(1500, 12), 
  new DB(1600, 1), 
  new DB(1606, 10), 
  new DB(1650, 26)
]);
dbs.set(2, [ 
  new DB(6, 154), 
  new DB(16, 98), 
  new DB(1001, 34), 
  new DB(1003, 20000), 
  new DB(1004, 10000), 
  new DB(1005, 448), 
  new DB(1006, 327), 
  new DB(1030, 148), 
  new DB(1031, 12), 
  new DB(1500, 12), 
  new DB(1600, 1), 
  new DB(1606, 10), 
  new DB(1650, 26)
]);
dbs.set(3, [ 
  new DB(6, 154), 
  new DB(16, 98), 
  new DB(1001, 34), 
  new DB(1003, 20000), 
  new DB(1004, 10000), 
  new DB(1005, 448), 
  new DB(1006, 327), 
  new DB(1030, 148), 
  new DB(1031, 12), 
  new DB(1500, 12), 
  new DB(1600, 1), 
  new DB(1606, 10), 
  new DB(1650, 26)
]);
dbs.set(4, [ 
  new DB(6, 154), 
  new DB(16, 98), 
  new DB(1001, 34), 
  new DB(1003, 20000), 
  new DB(1004, 10000), 
  new DB(1005, 448), 
  new DB(1006, 327), 
  new DB(1030, 148), 
  new DB(1031, 12), 
  new DB(1500, 12), 
  new DB(1600, 1), 
  new DB(1606, 10), 
  new DB(1650, 26)
]);
dbs.set(5, [ 
  new DB(6, 154), 
  new DB(16, 98), 
  new DB(1001, 34), 
  new DB(1003, 20000), 
  new DB(1004, 10000), 
  new DB(1005, 448), 
  new DB(1006, 327), 
  new DB(1030, 148), 
  new DB(1031, 12), 
  new DB(1500, 12), 
  new DB(1600, 1), 
  new DB(1606, 10), 
  new DB(1650, 26)
]);
dbs.set(6, [ 
  new DB(6, 154), 
  new DB(16, 98), 
  new DB(1001, 34), 
  new DB(1003, 20000), 
  new DB(1004, 10000), 
  new DB(1005, 448), 
  new DB(1006, 327), 
  new DB(1030, 148), 
  new DB(1031, 12), 
  new DB(1500, 12), 
  new DB(1600, 1), 
  new DB(1606, 10), 
  new DB(1650, 26)
]);

// Init clients
const clients = {
  1: new Client('192.168.0.11'),
  2: new Client('192.168.0.12'),
  3: new Client('192.168.0.13'),
  4: new Client('192.168.0.14'),
  5: new Client('192.168.0.15'),
  6: new Client('192.168.0.16')
};

// Loop on reading operation
function run() {
  
    for(let i in clients) {
        for(let db of dbs.get(parseInt(i))) {
            clients[i].update(db);
        }
    }

    setTimeout(run, 2000);
}

run();

@benoitblin
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I've built node-snap7 from source with --debug configuration, but I don't know how to get more infos than this backtrace.

*** Error in `node': corrupted size vs. prev_size: 0x0000000002d6bc00 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x777e5)[0x7f513c6ca7e5]
/lib/x86_64-linux-gnu/libc.so.6(+0x80dfb)[0x7f513c6d3dfb]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x4c)[0x7f513c6d753c]
/path/to/my/app/node_modules/node-snap7/build/Debug/node_snap7.node(_ZN10node_snap78IOWorkerD0Ev+0x24)[0x7f513a4025ae]
/path/to/my/app/node_modules/node-snap7/build/Debug/node_snap7.node(_ZN3Nan11AsyncWorker7DestroyEv+0x2a)[0x7f513a40194a]
/path/to/my/app/node_modules/node-snap7/build/Debug/node_snap7.node(_ZN3Nan20AsyncExecuteCompleteEP9uv_work_s+0x45)[0x7f513a401ae1]
node[0x14549d5]
node[0x1456a8b]
node[0x14685e8]
node(uv_run+0x156)[0x1457416]
node(ZN4node5StartEP9uv_loop_siPKPKciS5+0xc75)[0x122a035]
node(_ZN4node5StartEiPPc+0x163)[0x1222c93]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf0)[0x7f513c673830]
node[0x8ae4c1]

@mathiask88
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Is this still a thing? I got some spare time now and I can't repro this on my machine so I'll try to set up a VM for this. Sorry for the delay :/

@benoitblin
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Thank you for attention. Yes I still have this error. Let me know if I can help you.

@coojames1010
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coojames1010 commented Apr 2, 2019 •
edited
Loading

I have written a program that is also running into this problem after random amounts of time. I am attaching my error log below. What else can I do to help to pin point what is causing the issue here?

I am on CentOS 7.6, NodeJS 10.15.3, NPM 6.4.1, node-snap7 1.0.2.

When this error happens my system is generating core dump files each time if those would be useful to you.

*** Error in `node /home/CommandService': free(): invalid pointer: 0x0000000003f5a4d0 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x81489)[0x7f9793344489]
/home/CommandService/my_modules/plc-siemens/node_modules/node-snap7/build/Release/node_snap7.node(_ZN10node_snap78IOWorkerD0Ev+0xb7)[0x7f9790886207]
node /home/CommandService[0xa45565]
node /home/CommandService[0xa498df]
node /home/CommandService[0xa5a5c8]
node /home/CommandService(uv_run+0x14b)[0xa4a21b]
node /home/CommandService(ZN4node5StartEPN2v87IsolateEPNS_11IsolateDataERKSt6vectorISsSaISsEES9+0x565)[0x8e6f45]
node /home/CommandService(_ZN4node5StartEiPPc+0x469)[0x8e5239]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f97932e53d5]
node /home/CommandService[0x89ed85]
======= Memory map: ========
00400000-02296000 r-xp 00000000 fd:00 137437568 /usr/bin/node
02495000-02497000 r--p 01e95000 fd:00 137437568 /usr/bin/node
02497000-024ac000 rw-p 01e97000 fd:00 137437568 /usr/bin/node
024ac000-024c6000 rw-p 00000000 00:00 0
03ef8000-043c6000 rw-p 00000000 00:00 0 [heap]
5565300000-5565380000 rw-p 00000000 00:00 0
f9b8b80000-f9b8c00000 rw-p 00000000 00:00 0
13f9cb00000-13f9cb80000 rw-p 00000000 00:00 0
4444bb80000-4444bc00000 rw-p 00000000 00:00 0
5749fa80000-5749fb00000 rw-p 00000000 00:00 0
59aaa180000-59aaa200000 rw-p 00000000 00:00 0
64c5bc00000-64c5bc80000 rw-p 00000000 00:00 0
6731a700000-6731a703000 rw-p 00000000 00:00 0
7315fc00000-7315fc83000 rw-p 00000000 00:00 0
917b1480000-917b1500000 rw-p 00000000 00:00 0
96ebcf80000-96ebd000000 rw-p 00000000 00:00 0
a16e8a80000-a16e8b00000 rw-p 00000000 00:00 0
a2032a00000-a2032a80000 rw-p 00000000 00:00 0
a68cf100000-a68cf180000 rw-p 00000000 00:00 0
b3bb3c00000-b3bb3c80000 rw-p 00000000 00:00 0
b4a67b00000-b4a67b80000 rw-p 00000000 00:00 0
b8f56680000-b8f56700000 rw-p 00000000 00:00 0
bdd23a80000-bdd23b00000 rw-p 00000000 00:00 0
c8c9fd00000-c8c9fd80000 rw-p 00000000 00:00 0
d9f98580000-d9f98600000 rw-p 00000000 00:00 0
e5586280000-e5586300000 rw-p 00000000 00:00 0
ed26ae00000-ed26ae80000 rw-p 00000000 00:00 0
10edaee80000-10edaef00000 rw-p 00000000 00:00 0
112d47000000-112d47080000 rw-p 00000000 00:00 0
112f45080000-112f45100000 rw-p 00000000 00:00 0
113b48e00000-113b48e80000 rw-p 00000000 00:00 0
12221ea00000-12221ea03000 rw-p 00000000 00:00 0
12221ea03000-12221ea80000 r--p 00000000 00:00 0
122b65900000-122b65980000 rw-p 00000000 00:00 0
1298a4580000-1298a4600000 rw-p 00000000 00:00 0
13e531600000-13e531680000 rw-p 00000000 00:00 0
13fe66700000-13fe66780000 rw-p 00000000 00:00 0
149967c80000-149967d00000 rw-p 00000000 00:00 0
152870680000-152870700000 rw-p 00000000 00:00 0
1528d3f80000-1528d4000000 rw-p 00000000 00:00 0
1557e2f80000-1557e3000000 rw-p 00000000 00:00 0
15d70d680000-15d70d700000 rw-p 00000000 00:00 0
163334100000-163334180000 rw-p 00000000 00:00 0
16a71ff80000-16a720000000 rw-p 00000000 00:00 0
16bbcbc00000-16bbcbc80000 rw-p 00000000 00:00 0
17265be00000-17265be80000 rw-p 00000000 00:00 0
17b58f000000-17b58f080000 rw-p 00000000 00:00 0
1825d6980000-1825d6a00000 rw-p 00000000 00:00 0
183ded5bc000-183ded5c4000 rw-p 00000000 00:00 0
189832780000-189832800000 rw-p 00000000 00:00 0
1a67ea281000-1a67ea300000 ---p 00000000 00:00 0
1a67ea300000-1a67ea303000 rw-p 00000000 00:00 0
1a67ea303000-1a67ea304000 ---p 00000000 00:00 0
1a67ea304000-1a67ea37f000 r-xp 00000000 00:00 0
1a67ea37f000-1a67ea380000 ---p 00000000 00:00 0
1a67ea380000-1a67ea383000 rw-p 00000000 00:00 0
1a67ea383000-1a67ea384000 ---p 00000000 00:00 0
1a67ea384000-1a67ea3ff000 r-xp 00000000 00:00 0
1a67ea3ff000-1a67ea400000 ---p 00000000 00:00 0
1a67ea400000-1a67ea403000 rw-p 00000000 00:00 0
1a67ea403000-1a67ea404000 ---p 00000000 00:00 0
1a67ea404000-1a67ea419000 r-xp 00000000 00:00 0
1a67ea419000-1a67ea480000 ---p 00000000 00:00 0
1a67ea480000-1a67ea483000 rw-p 00000000 00:00 0
1a67ea483000-1a67ea484000 ---p 00000000 00:00 0
1a67ea484000-1a67ea499000 r-xp 00000000 00:00 0
1a67ea499000-1a67ea500000 ---p 00000000 00:00 0
1a67ea500000-1a67ea503000 rw-p 00000000 00:00 0
1a67ea503000-1a67ea504000 ---p 00000000 00:00 0
1a67ea504000-1a67ea519000 r-xp 00000000 00:00 0
1a67ea519000-1a67ea580000 ---p 00000000 00:00 0
1a67ea580000-1a67ea583000 rw-p 00000000 00:00 0
1a67ea583000-1a67ea584000 ---p 00000000 00:00 0
1a67ea584000-1a67ea5ff000 r-xp 00000000 00:00 0
1a67ea5ff000-1a67f2281000 ---p 00000000 00:00 0
1a8a6c380000-1a8a6c400000 rw-p 00000000 00:00 0
1abba3480000-1abba3500000 rw-p 00000000 00:00 0
1add8c800000-1add8c880000 rw-p 00000000 00:00 0
1b40aa200000-1b40aa280000 rw-p 00000000 00:00 0
1bd78a500000-1bd78a580000 rw-p 00000000 00:00 0
1c5f45380000-1c5f45400000 rw-p 00000000 00:00 0
1d4ff5180000-1d4ff5200000 rw-p 00000000 00:00 0
1dd2cb080000-1dd2cb100000 rw-p 00000000 00:00 0
1de971780000-1de971800000 rw-p 00000000 00:00 0
1e5544c80000-1e5544d00000 rw-p 00000000 00:00 0
1ecc6aa00000-1ecc6aa80000 rw-p 00000000 00:00 0
1ff574200000-1ff574280000 rw-p 00000000 00:00 0
20b0e6380000-20b0e6400000 rw-p 00000000 00:00 0
2199cbb00000-2199cbb80000 rw-p 00000000 00:00 0
230789080000-230789100000 rw-p 00000000 00:00 0
23136a380000-23136a400000 rw-p 00000000 00:00 0
231dd8380000-231dd8400000 rw-p 00000000 00:00 0
2339b9b80000-2339b9c00000 rw-p 00000000 00:00 0
23e3e0900000-23e3e0980000 rw-p 00000000 00:00 0
24958e800000-24958e880000 rw-p 00000000 00:00 0
251d1c500000-251d1c580000 rw-p 00000000 00:00 0
2569a0b00000-2569a0b39000 rw-p 00000000 00:00 0
271863c80000-271863d00000 rw-p 00000000 00:00 0
2720edf80000-2720ee000000 rw-p 00000000 00:00 0
278b98b80000-278b98c00000 rw-p 00000000 00:00 0
299d3b880000-299d3b900000 rw-p 00000000 00:00 0
2a3569c80000-2a3569d00000 rw-p 00000000 00:00 0
2b9da9a00000-2b9da9a80000 rw-p 00000000 00:00 0
2ba420e80000-2ba420f00000 rw-p 00000000 00:00 0
2c0611e00000-2c0611e80000 rw-p 00000000 00:00 0
2de961c00000-2de961c80000 rw-p 00000000 00:00 0
2f0fd1d80000-2f0fd1e00000 rw-p 00000000 00:00 0
2fc899c80000-2fc899d00000 rw-p 00000000 00:00 0
306824900000-306824980000 rw-p 00000000 00:00 0
30ce7d880000-30ce7d900000 rw-p 00000000 00:00 0
312072400000-312072480000 rw-p 00000000 00:00 0
336c1a500000-336c1a580000 rw-p 00000000 00:00 0
33821b980000-33821ba00000 rw-p 00000000 00:00 0
343e9c200000-343e9c280000 rw-p 00000000 00:00 0
34a74e280000-34a74e300000 rw-p 00000000 00:00 0
34e99fa00000-34e99fa80000 rw-p 00000000 00:00 0
385f14d80000-385f14e00000 rw-p 00000000 00:00 0
387fdbb80000-387fdbc00000 rw-p 00000000 00:00 0
38c220c80000-38c220d00000 rw-p 00000000 00:00 0
392dc1800000-392dc1880000 rw-p 00000000 00:00 0
3945b1280000-3945b1300000 rw-p 00000000 00:00 0
395054280000-395054300000 rw-p 00000000 00:00 0
3a2e06c00000-3a2e06c80000 rw-p 00000000 00:00 0
3a62ab700000-3a62ab780000 rw-p 00000000 00:00 0
3a6b46800000-3a6b46880000 rw-p 00000000 00:00 0
3b1011500000-3b1011580000 rw-p 00000000 00:00 0
3b6382080000-3b6382100000 rw-p 00000000 00:00 0
3c2600300000-3c2600380000 rw-p 00000000 00:00 0
3d2015f00000-3d2015f80000 rw-p 00000000 00:00 0
3dc15b500000-3dc15b580000 rw-p 00000000 00:00 0
3ed37ee00000-3ed37ee80000 rw-p 00000000 00:00 0
3fa27fa80000-3fa27fb00000 rw-p 00000000 00:00 0
7f9774000000-7f9774021000 rw-p 00000000 00:00 0
7f9774021000-7f9778000000 ---p 00000000 00:00 0
7f977a7fd000-7f977a7fe000 ---p 00000000 00:00 0
7f977a7fe000-7f977affe000 rw-p 00000000 00:00 0
7f977affe000-7f977afff000 ---p 00000000 00:00 0
7f977afff000-7f977b7ff000 rw-p 00000000 00:00 0
7f977b7ff000-7f977b800000 ---p 00000000 00:00 0
7f977b800000-7f977c000000 rw-p 00000000 00:00 0
7f977c000000-7f977c19b000 rw-p 00000000 00:00 0
7f977c19b000-7f9780000000 ---p 00000000 00:00 0
7f9780000000-7f9780165000 rw-p 00000000 00:00 0
7f9780165000-7f9784000000 ---p 00000000 00:00 0
7f9784000000-7f97840b6000 rw-p 00000000 00:00 0
7f97840b6000-7f9788000000 ---p 00000000 00:00 0
7f9788000000-7f9788143000 rw-p 00000000 00:00 0
7f9788143000-7f978c000000 ---p 00000000 00:00 0
7f978c000000-7f978c021000 rw-p 00000000 00:00 0
7f978c021000-7f9790000000 ---p 00000000 00:00 0
7f9790056000-7f9790057000 ---p 00000000 00:00 0
7f9790057000-7f9790857000 rw-p 00000000 00:00 0
7f9790857000-7f97908b7000 r-xp 00000000 fd:02 1611106922 /home/CommandService/my_modules/plc-siemens/node_modules/node-snap7/build/Release/node_snap7.node
7f97908b7000-7f9790ab6000 ---p 00060000 fd:02 1611106922 /home/CommandService/my_modules/plc-siemens/node_modules/node-snap7/build/Release/node_snap7.node
7f9790ab6000-7f9790ab8000 r--p 0005f000 fd:02 1611106922 /home/CommandService/my_modules/plc-siemens/node_modules/node-snap7/build/Release/node_snap7.node
7f9790ab8000-7f9790abe000 rw-p 00061000 fd:02 1611106922 /home/CommandService/my_modules/plc-siemens/node_modules/node-snap7/build/Release/node_snap7.node
7f9790abe000-7f9790abf000 ---p 00000000 00:00 0
7f9790abf000-7f97912bf000 rw-p 00000000 00:00 0
7f97912bf000-7f97912c0000 ---p 00000000 00:00 0
7f97912c0000-7f9791ac0000 rw-p 00000000 00:00 0
7f9791ac0000-7f9791ac1000 ---p 00000000 00:00 0
7f9791ac1000-7f97922c1000 rw-p 00000000 00:00 0
7f97922c1000-7f97922c2000 ---p 00000000 00:00 0
7f97922c2000-7f9792ac2000 rw-p 00000000 00:00 0
7f9792ac2000-7f9792ac3000 ---p 00000000 00:00 0
7f9792ac3000-7f97932c3000 rw-p 00000000 00:00 0
7f97932c3000-7f9793485000 r-xp 00000000 fd:00 201327384 /usr/lib64/libc-2.17.so
7f9793485000-7f9793685000 ---p 001c2000 fd:00 201327384 /usr/lib64/libc-2.17.so
7f9793685000-7f9793689000 r--p 001c2000 fd:00 201327384 /usr/lib64/libc-2.17.so
7f9793689000-7f979368b000 rw-p 001c6000 fd:00 201327384 /usr/lib64/libc-2.17.so
7f979368b000-7f9793690000 rw-p 00000000 00:00 0
7f9793690000-7f97936a7000 r-xp 00000000 fd:00 203032079 /usr/lib64/libpthread-2.17.so
7f97936a7000-7f97938a6000 ---p 00017000 fd:00 203032079 /usr/lib64/libpthread-2.17.so
7f97938a6000-7f97938a7000 r--p 00016000 fd:00 203032079 /usr/lib64/libpthread-2.17.so
7f97938a7000-7f97938a8000 rw-p 00017000 fd:00 203032079 /usr/lib64/libpthread-2.17.so
7f97938a8000-7f97938ac000 rw-p 00000000 00:00 0
7f97938ac000-7f97938c1000 r-xp 00000000 fd:00 204907957 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f97938c1000-7f9793ac0000 ---p 00015000 fd:00 204907957 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f9793ac0000-7f9793ac1000 r--p 00014000 fd:00 204907957 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f9793ac1000-7f9793ac2000 rw-p 00015000 fd:00 204907957 /usr/lib64/libgcc_s-4.8.5-20150702.so.1
7f9793ac2000-7f9793bc3000 r-xp 00000000 fd:00 201327990 /usr/lib64/libm-2.17.so
7f9793bc3000-7f9793dc2000 ---p 00101000 fd:00 201327990 /usr/lib64/libm-2.17.so
7f9793dc2000-7f9793dc3000 r--p 00100000 fd:00 201327990 /usr/lib64/libm-2.17.so
7f9793dc3000-7f9793dc4000 rw-p 00101000 fd:00 201327990 /usr/lib64/libm-2.17.so
7f9793dc4000-7f9793ead000 r-xp 00000000 fd:00 201331475 /usr/lib64/libstdc++.so.6.0.19
7f9793ead000-7f97940ac000 ---p 000e9000 fd:00 201331475 /usr/lib64/libstdc++.so.6.0.19
7f97940ac000-7f97940b4000 r--p 000e8000 fd:00 201331475 /usr/lib64/libstdc++.so.6.0.19
7f97940b4000-7f97940b6000 rw-p 000f0000 fd:00 201331475 /usr/lib64/libstdc++.so.6.0.19
7f97940b6000-7f97940cb000 rw-p 00000000 00:00 0
7f97940cb000-7f97940d2000 r-xp 00000000 fd:00 203032083 /usr/lib64/librt-2.17.so
7f97940d2000-7f97942d1000 ---p 00007000 fd:00 203032083 /usr/lib64/librt-2.17.so
7f97942d1000-7f97942d2000 r--p 00006000 fd:00 203032083 /usr/lib64/librt-2.17.so
7f97942d2000-7f97942d3000 rw-p 00007000 fd:00 203032083 /usr/lib64/librt-2.17.so
7f97942d3000-7f97942d5000 r-xp 00000000 fd:00 201327988 /usr/lib64/libdl-2.17.so
7f97942d5000-7f97944d5000 ---p 00002000 fd:00 201327988 /usr/lib64/libdl-2.17.so
7f97944d5000-7f97944d6000 r--p 00002000 fd:00 201327988 /usr/lib64/libdl-2.17.so
7f97944d6000-7f97944d7000 rw-p 00003000 fd:00 201327988 /usr/lib64/libdl-2.17.so
7f97944d7000-7f97944f9000 r-xp 00000000 fd:00 201327621 /usr/lib64/ld-2.17.so
7f97946e9000-7f97946f0000 rw-p 00000000 00:00 0
7f97946f1000-7f97946f2000 rw-p 00000000 00:00 0
7f97946f2000-7f97946f3000 ---p 00000000 00:00 0
7f97946f3000-7f97946f8000 rw-p 00000000 00:00 0
7f97946f8000-7f97946f9000 r--p 00021000 fd:00 201327621 /usr/lib64/ld-2.17.so
7f97946f9000-7f97946fa000 rw-p 00022000 fd:00 201327621 /usr/lib64/ld-2.17.so
7f97946fa000-7f97946fb000 rw-p 00000000 00:00 0
7ffe4f730000-7ffe4f751000 rw-p 00000000 00:00 0 [stack]
7ffe4f7a7000-7ffe4f7a9000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]

@coojames1010
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After reading this thread I have also run this command:
npm install node-snap7 --build-from-source --debug

If I get anymore useful logs after having run that I will report back with them.

@coojames1010
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After having built node-snap7 from source with the --debug flag my backtrace error looks like this:

  • corrupted size vs. prev_size:

*** Error in `node /home/CommandService': corrupted size vs. prev_size: 0x0000000003ac2e20 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x80d97)[0x7f2307555d97]
/lib64/libc.so.6(+0x82295)[0x7f2307557295]
/lib64/libc.so.6(__libc_malloc+0x4c)[0x7f230755a1ac]
node /home/CommandService(_ZN4node14StreamListener13OnStreamAllocEm+0x20)[0x9a5700]
node /home/CommandService[0x9ad1ac]
node /home/CommandService[0xa547ac]
node /home/CommandService[0xa54fa0]
node /home/CommandService[0xa5a5c8]
node /home/CommandService(uv_run+0x14b)[0xa4a21b]
node /home/CommandService(ZN4node5StartEPN2v87IsolateEPNS_11IsolateDataERKSt6vectorISsSaISsEES9+0x565)[0x8e6f45]
node /home/CommandService(_ZN4node5StartEiPPc+0x469)[0x8e5239]
/lib64/libc.so.6(__libc_start_main+0xf5)[0x7f23074f73d5]
node /home/CommandService[0x89ed85]
======= Memory map: ========

@mathiask88
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Owner

Sorry for having not much time at the moment. Unfortunately I can't reproduce this. A minimal example on a fresh VM would help, so that I am able to reproduce this error and investigate the cause. Would also be nice if you can test if this happens for all non EOL major stable node versions.

@SherryHolmes
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I have the same problem.
*** buffer overflow detected ***: node terminated ======= Backtrace: ========= /lib64/libc.so.6(__fortify_fail+0x37)[0x7f964d8416e7] /lib64/libc.so.6(+0x116862)[0x7f964d83f862] /lib64/libc.so.6(+0x118647)[0x7f964d841647] /home/sherry/smydProject/plcServer/B/node_modules/[email protected]@node-snap7/build/Release/node_snap7.node(_ZN10TMsgSocket10SckConnectEv+0x119)[0x7f964950bbd9] /home/sherry/smydProject/plcServer/B/node_modules/[email protected]@node-snap7/build/Release/node_snap7.node(_ZN13TIsoTcpSocket10isoConnectEv+0x48)[0x7f96494f8f88] /home/sherry/smydProject/plcServer/B/node_modules/[email protected]@node-snap7/build/Release/node_snap7.node(_ZN10TSnap7Peer11PeerConnectEv+0x19)[0x7f96494fbe59] /home/sherry/smydProject/plcServer/B/node_modules/[email protected]@node-snap7/build/Release/node_snap7.node(_ZN17TSnap7MicroClient7ConnectEv+0x1d)[0x7f964950a0ad] /home/sherry/smydProject/plcServer/B/node_modules/[email protected]@node-snap7/build/Release/node_snap7.node(_ZN10node_snap78IOWorker7ExecuteEv+0x117)[0x7f96494d9857] node[0x15a8ec1] /lib64/libpthread.so.0(+0x7e25)[0x7f964dafde25] /lib64/libc.so.6(clone+0x6d)[0x7f964d827bad] ======= Memory map: ======== 00400000-0205e000 r-xp 00000000 fd:02 100875731 /home/sherry/node-v8.4.0-linux-x64/bin/node 0225d000-02279000 rw-p 01c5d000 fd:02 100875731 /home/sherry/node-v8.4.0-linux-x64/bin/node 02279000-02291000 rw-p 00000000 00:00 0 03842000-03ee6000 rw-p 00000000 00:00 0 [heap] 2c05d00000-2c05d80000 ---p 00000000 00:00 0 340b900000-340b980000 ---p 00000000 00:00 0 3ab0500000-3ab0580000 ---p 00000000 00:00 0 7efd280000-7efd300000 rw-p 00000000 00:00 0 ae4a000000-ae4a080000 ---p 00000000 00:00 0 c852f00000-c852f80000 ---p 00000000 00:00 0 c905c80000-c905d5a000 rw-p 00000000 00:00 0 de3bc00000-de3bcac000 rw-p 00000000 00:00 0 216c4900000-216c4980000 ---p 00000000 00:00 0 2dec5880000-2dec5900000 ---p 00000000 00:00 0 37083b00000-37083b80000 rw-p 00000000 00:00 0 3aa40880000-3aa40900000 ---p 00000000 00:00 0

@BrkDalkiran
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BrkDalkiran commented Aug 1, 2023 •
edited
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hi @mathiask88,
i caught when the error occuring,

If there is an error in the code 655470, one of the following errors will definitely appear in the next db reading. I tested this 20 times

  1. free(): invalid next size (fast)
  2. corrupted size vs. prev_size
  3. free(): invalid pointer
  4. malloc(): unaligned tcache chunk detected
  5. corrupted double-linked list
clients[deviceId]
  .DBRead(parseInt(dbNumber), 0, blocks[deviceId][dbNumber]['amount'], function (err, res) {
    if (err) {
      console.log(`DBRead error`, err, clients[deviceId].ErrorText(err))
    } else {
    }
  })

DBRead error 655470 ISO : An error occurred during recv TCP : Connection timed out

Edit:

To avoid this error, I did something like this:
If an error is returned from the DBRead function, I terminate the client connection and connect again. It's been 6 hours and it's been working fine. Previously the error occurred every 5 minutes.

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@mathiask88 @BrkDalkiran @benoitblin @SherryHolmes @coojames1010