Qwebkit crash occured while sending QNetworkRequest continuously

[shankarqt]

We are developing a in built browser in our application using Qwebkit. QNetworkAccessManager::CreateRequest API is used to send network requests to launch the sites.
The crash with following stacktrace is observed while switching rapidly between the browser tabs.

Crash reason: SIGSEGV
Crash address: 0x0
Process uptime: not available

Thread 55 (crashed)
0 libQt5Network.so.5.11.3!QHttpPart::setBody(QByteArray const&) + 0x6da5
r0 = 0x00000000 r1 = 0x00000000 r2 = 0x00000006 r3 = 0x2b098518
r4 = 0x318a1ac0 r5 = 0x00000090 r6 = 0x00000001 r7 = 0x00000000
r8 = 0x76f1b900 r9 = 0x2f80d170 r10 = 0x2b098488 r12 = 0x73594264
fp = 0xaaaaaaab sp = 0x342708b8 lr = 0x7438bc2d pc = 0x7438ca1a
Found by: given as instruction pointer in context
1 libQt5Network.so.5.11.3!QHttpPart::setBody(QByteArray const&) + 0x6294
sp = 0x342708d8 pc = 0x7438bf0b
Found by: stack scanning
2 libQt5Network.so.5.11.3!QHttpPart::setBody(QByteArray const&) + 0x1303e
sp = 0x34270910 pc = 0x74398cb5
Found by: stack scanning
3 libQt5Network.so.5.11.3!QUdpSocket::qt_metacall(QMetaObject::Call, int, void**) + 0x6d75
sp = 0x34270914 pc = 0x7441e958
Found by: stack scanning
4 libQt5Core.so.5.11.3 + 0x298392
sp = 0x3427094c pc = 0x76a36394
Found by: stack scanning
5 libQt5Core.so.5.11.3 + 0x298392
sp = 0x34270950 pc = 0x76a36394
Found by: stack scanning
6 libQt5Core.so.5.11.3 + 0x298392
sp = 0x34270954 pc = 0x76a36394
Found by: stack scanning
7 libQt5Widgets.so.5.11.3 + 0xfa16f
sp = 0x34270970 pc = 0x7635d171
Found by: stack scanning
8 libQt5Network.so.5.11.3!QHttpMultiPart::qt_metacall(QMetaObject::Call, int, void**) + 0x1454
sp = 0x34270980 pc = 0x7441447b
Found by: stack scanning
9 libQt5Network.so.5.11.3!QHttpMultiPart::qt_metacall(QMetaObject::Call, int, void**) + 0x42c
sp = 0x342709a0 pc = 0x74413453
Found by: stack scanning
10 libQt5Core.so.5.11.3 + 0x1d663d
sp = 0x342709c0 pc = 0x7697463f
Found by: stack scanning
11 EloApp + 0x296f9c
sp = 0x342709dc pc = 0x002a6f9e
Found by: stack scanning
12 libQt5Widgets.so.5.11.3 + 0xfa16f
sp = 0x34270a10 pc = 0x7635d171
Found by: stack scanning
13 libQt5Core.so.5.11.3 + 0x1f5919
sp = 0x34270a20 pc = 0x7699391b
Found by: stack scanning
14 libQt5Network.so.5.11.3!QSslSocket::setCiphers(QString const&) + 0x756
sp = 0x34270a24 pc = 0x743f8291
Found by: stack scanning
15 libQt5Network.so.5.11.3!QSslSocket::setCiphers(QString const&) + 0x91e
sp = 0x34270a28 pc = 0x743f8459
Found by: stack scanning
16 libQt5Core.so.5.11.3 + 0x1f4b4d
sp = 0x34270a50 pc = 0x76992b4f
Found by: stack scanning
17 libQt5Core.so.5.11.3 + 0x148349
sp = 0x34270a98 pc = 0x768e634b
Found by: stack scanning
18 libQt5Widgets.so.5.11.3 + 0xfa16f
sp = 0x34270b04 pc = 0x7635d171
Found by: stack scanning
19 libQt5Widgets.so.5.11.3 + 0xf4d69
sp = 0x34270b08 pc = 0x76357d6b
Found by: stack scanning
20 libQt5Widgets.so.5.11.3 + 0xfa797
sp = 0x34270b20 pc = 0x7635d799
Found by: stack scanning
21 libQt5Widgets.so.5.11.3 + 0xfa16f
sp = 0x34270b2c pc = 0x7635d171
Found by: stack scanning
22 libQt5Network.so.5.11.3!QTcpServer::incomingConnection(int) + 0x9cc2
sp = 0x34270b30 pc = 0x743dd4e9
Found by: stack scanning
23 libQt5Network.so.5.11.3!QTcpServer::incomingConnection(int) + 0x9c9e
sp = 0x34270b34 pc = 0x743dd4c5
Found by: stack scanning
24 libQt5Widgets.so.5.11.3 + 0xf4d69
sp = 0x34270b38 pc = 0x76357d6b
Found by: stack scanning
25 libQt5Core.so.5.11.3 + 0x1e18a1
sp = 0x34270b88 pc = 0x7697f8a3
Found by: stack scanning
26 libQt5Core.so.5.11.3 + 0x1e6793
sp = 0x34270b94 pc = 0x76984795
Found by: stack scanning
27 libQt5Core.so.5.11.3 + 0x1e6a33
sp = 0x34270b98 pc = 0x76984a35
Found by: stack scanning
28 libQt5Core.so.5.11.3 + 0x1e3ce1
sp = 0x34270bc0 pc = 0x76981ce3
Found by: stack scanning
29 libQt5Network.so.5.11.3!QHostInfo::fromName(QString const&) + 0x1062
sp = 0x34270be8 pc = 0x743bcfb9
Found by: stack scanning
30 libQt5Network.so.5.11.3!QHostInfo::fromName(QString const&) + 0xfe2
sp = 0x34270bec pc = 0x743bcf39
Found by: stack scanning
31 libQt5Core.so.5.11.3 + 0x88e33
sp = 0x34270c30 pc = 0x76826e35
Found by: stack scanning
32 libsquishqtwrapper.so + 0x202f5b
sp = 0x34270c38 pc = 0x6d3d5f5d
Found by: stack scanning
33 libsquishqtpre.so + 0x3977
sp = 0x34270c54 pc = 0x76edf979
Found by: stack scanning
34 libQt5Quick.so.5.11.3 + 0xb6ffe
sp = 0x34270c58 pc = 0x738e7000
Found by: stack scanning
35 zero (deleted) + 0x42dc39a
sp = 0x34270c5c pc = 0x3fdce39c
Found by: stack scanning
36 zero (deleted) + 0x420d3fc
sp = 0x34270c64 pc = 0x3fcff3fe
Found by: stack scanning
37 libQt5Widgets.so.5.11.3 + 0xfa16f
sp = 0x34270c88 pc = 0x7635d171
Found by: stack scanning
38 libQt5Core.so.5.11.3 + 0x1d3e4d
sp = 0x34270c98 pc = 0x76971e4f
Found by: stack scanning
39 EloApp + 0x6cdb8e
sp = 0x34270ca0 pc = 0x006ddb90
Found by: stack scanning
40 libQt5Core.so.5.11.3 + 0x1d6173
sp = 0x34270cd0 pc = 0x76974175
Found by: stack scanning
41 libQt5Core.so.5.11.3 + 0x211cfb
sp = 0x34270d00 pc = 0x769afcfd
Found by: stack scanning
42 EloApp + 0x30030
sp = 0x34270d0c pc = 0x00040032
Found by: stack scanning
43 libQt5Core.so.5.11.3 + 0x211d4b
sp = 0x34270d30 pc = 0x769afd4d
Found by: stack scanning
44 libQt5Core.so.5.11.3 + 0x298392
sp = 0x34270d6c pc = 0x76a36394
Found by: stack scanning
45 libQt5Core.so.5.11.3 + 0x298392
sp = 0x34270d70 pc = 0x76a36394
Found by: stack scanning
46 libQt5Core.so.5.11.3 + 0x298392
sp = 0x34270d7c pc = 0x76a36394
Found by: stack scanning
47 libQt5Core.so.5.11.3 + 0x1d2a2f
sp = 0x34270da0 pc = 0x76970a31
Found by: stack scanning
48 libQt5Core.so.5.11.3 + 0x1d26a5
sp = 0x34270dc0 pc = 0x769706a7
Found by: stack scanning
49 libQt5Core.so.5.11.3 + 0x217967
sp = 0x34270dc4 pc = 0x769b5969
Found by: stack scanning
50 libQt5Core.so.5.11.3 + 0x89625
sp = 0x34270df0 pc = 0x76827627
Found by: stack scanning
51 libQt5Core.so.5.11.3 + 0x91215
sp = 0x34270e20 pc = 0x7682f217
Found by: stack scanning
52 libQt5Network.so.5.11.3!QUdpSocket::qt_metacall(QMetaObject::Call, int, void**) + 0x5a5
sp = 0x34270e2c pc = 0x74418188
Found by: stack scanning
53 libQt5Network.so.5.11.3!QUdpSocket::qt_metacall(QMetaObject::Call, int, void**) + 0x5a5
sp = 0x34270e30 pc = 0x74418188
Found by: stack scanning
54 libpthread-2.28.so + 0x5bb9
sp = 0x34270e50 pc = 0x76ebcbbb
Found by: stack scanning
55 libQt5Quick.so.5.11.3 + 0xb6ffe
sp = 0x34270e8c pc = 0x738e7000
Found by: stack scanning
56 zero (deleted) + 0x42dc39a
sp = 0x34270e90 pc = 0x3fdce39c
Found by: stack scanning
57 zero (deleted) + 0x420d3fc
sp = 0x34270e98 pc = 0x3fcff3fe
Found by: stack scanning

The crash occurs while sending the QNetworkRequest through QNetworkAccessManager. Kindly let us know if any prerequisites needs to be met (in QNetworkRequest) to prevent this crash.

QT version used : QT 5.11.3

[Konstantin Tokarev]

Hard to tell anything from this backtrace, seems like it's from release build. Crash happens inside Qt and it's probably caused by your implementation of createRequest