Assert failed in buffer.h

[Lucas Yan]

Hi,

When running my program, i've got the following error:

assert failed. cond="m_current >= m_dataStart && m_current < m_dataEnd", msg="You have attempted to read beyond the bounds of the available buffer space. This usually indicates that a Header::Deserialize or Trailer::Deserialize method is trying to read data which was not written by a Header::Serialize or Trailer::Serialize method. In short: check the code of your Serialize and Deserialize methods.", file=./ns3/buffer.h, line=1002

Running the scenario under debugger, the backtrace shows the following result:

(gdb) backtrace

#0  0x00007fffeaa1f428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54

#1  0x00007fffeaa2102a in __GI_abort () at abort.c:89

#2  0x00007fffeb57f84d in __gnu_cxx::__verbose_terminate_handler() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

#3  0x00007fffeb57d6b6 in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

#4  0x00007fffeb57d701 in std::terminate() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6

#5  0x00007ffff7b76930 in ns3::Buffer::Iterator::PeekU8 (this=0x7fffffffbcd0) at ./ns3/buffer.h:1000

#6  0x00007ffff7b769fa in ns3::Buffer::Iterator::ReadU8 (this=0x7fffffffbcd0) at ./ns3/buffer.h:1023

#7  0x00007ffff7650236 in ns3::Buffer::Iterator::ReadU16 (this=0x7fffffffbcd0) at ./ns3/buffer.h:1031

#8  0x00007ffff380d341 in ns3::DsaRsp::Deserialize (this=0x7fffffffc580, start=...) at ../src/wimax/model/mac-messages.cc:767

#9  0x00007fffef4c2ffe in ns3::Packet::RemoveHeader (this=0x80ebb0, header=...) at ../src/network/model/packet.cc:282

#10 0x00007ffff37f37a5 in ns3::SubscriberStationNetDevice::DoReceive (this=0x7691d0, packet=...) at ../src/wimax/model/ss-net-device.cc:973

#11 0x00007ffff37bd427 in ns3::WimaxNetDevice::Receive (this=0x7691d0, burst=...) at ../src/wimax/model/wimax-net-device.cc:527

#12 0x00007ffff37cc940 in ns3::MemPtrCallbackImpl<ns3::WimaxNetDevice*, void (ns3::WimaxNetDevice::*)(ns3::Ptr<ns3::PacketBurst const>), void, ns3::Ptr<ns3::PacketBurst const>, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty>::operator()

    (this=0x76a5c0, a1=...) at ./ns3/callback.h:612

#13 0x00007ffff5445add in ns3::Callback<void, ns3::Ptr<ns3::PacketBurst const>, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty, ns3::empty>::operator() (this=0x7fffffffc840, a1=...) at ./ns3/callback.h:1291

#14 0x00007ffff38191c1 in ns3::SimpleOfdmWimaxPhy::EndReceive (this=0x6d5540, burst=...) at ../src/wimax/model/simple-ofdm-wimax-phy.cc:480

#15 0x00007ffff381fa14 in ns3::EventImpl* ns3::MakeEvent<void (ns3::SimpleOfdmWimaxPhy::*)(ns3::Ptr<ns3::PacketBurst const>), ns3::SimpleOfdmWimaxPhy*, ns3::Ptr<ns3::PacketBurst> >(void (ns3::SimpleOfdmWimaxPhy::*)(ns3::Ptr<ns3::PacketBurst const>), ns3::SimpleOfdmWimaxPhy*, ns3::Ptr<ns3::PacketBurst>)::EventMemberImpl1::Notify() (this=0x813cf0) at ./ns3/make-event.h:406

#16 0x00007fffeed30c2f in ns3::EventImpl::Invoke (this=0x813cf0) at ../src/core/model/event-impl.cc:51

#17 0x00007fffeed360bf in ns3::DefaultSimulatorImpl::ProcessOneEvent (this=0x6ca0a0) at ../src/core/model/default-simulator-impl.cc:149

#18 0x00007fffeed364d3 in ns3::DefaultSimulatorImpl::Run (this=0x6ca0a0) at ../src/core/model/default-simulator-impl.cc:202

#19 0x00007fffeed31e63 in ns3::Simulator::Run () at ../src/core/model/simulator.cc:230

#20 0x0000000000410b09 in main (argc=1, argv=0x7fffffffdd68) at ../scratch/final.cc:194

I can not figure out what's going wrong, I would really appreaciate any kind of help

Thanks

[pdbarnes]

The backtrace says the error is being detected in DsaRsp::Deserialize(), but that's almost certainly not where the error occurs, unless you modified it.  The error occurs because some object is serializing and deserializing a different number of bytes than claimed by the GetSerializedSize function for that object.  Look at the places you do this in your code, or have modified upstream code.

Peter