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  1. Traffic Server
  2. TS-3248

5.2.0 Segmentation fault due to TS-3189

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: 5.2.0
    • Fix Version/s: 5.2.0
    • Component/s: Core
    • Labels:

      Description

      Segmentation fault sometime

      (gdb) bt
      #0  0x000000000073334a in operator IOBufferBlock* (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at ../../lib/ts/Ptr.h:326
      #1  first_write_block (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at ../../iocore/eventsystem/I_IOBuffer.h:920
      #2  read_from_net (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at UnixNetVConnection.cc:244
      #3  0x0000000000727a62 in NetHandler::mainNetEvent (this=0x2b4d9e1e8b50, event=<value optimized out>, e=<value optimized out>) at UnixNet.cc:399
      #4  0x00000000007538f5 in handleEvent (this=0x2b4d9e1e5010, e=0x2b4d9f806d80, calling_code=5) at I_Continuation.h:146
      #5  EThread::process_event (this=0x2b4d9e1e5010, e=0x2b4d9f806d80, calling_code=5) at UnixEThread.cc:144
      #6  0x000000000075404b in EThread::execute (this=0x2b4d9e1e5010) at UnixEThread.cc:268
      #7  0x0000000000752d3a in spawn_thread_internal (a=0x157a1b0) at Thread.cc:88
      #8  0x00002b4d9b0fa9d1 in start_thread () from /lib64/libpthread.so.0
      #9  0x00002b4d9c0f19dd in clone () from /lib64/libc.so.6
      (gdb) f 2
      #2  read_from_net (nh=0x2b4d9e1e8b50, vc=0x2aaac11114d0, thread=0x2b4d9e1e5010) at UnixNetVConnection.cc:244
      244	    IOBufferBlock *b = buf.writer()->first_write_block();
      (gdb) l
      239	  // read data
      240	  int64_t rattempted = 0, total_read = 0;
      241	  int niov = 0;
      242	  IOVec tiovec[NET_MAX_IOV];
      243	  if (toread) {
      244	    IOBufferBlock *b = buf.writer()->first_write_block();
      245	    do {
      246	      niov = 0;
      247	      rattempted = 0;
      248	      while (b && niov < NET_MAX_IOV) {
      (gdb) p buf
      $1 = (MIOBufferAccessor &) @0x2aaac1111608: {mbuf = 0x0, entry = 0x0}
      (gdb) p toread 
      $2 = 7768
      (gdb) 
      

      at line 244 ,mbuf = 0x0, so buf.writer() return NULL

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            • Assignee:
              sudheerv Sudheer Vinukonda
              Reporter:
              tufang14 Qiang Li
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              • Created:
                Updated:
                Resolved: