SIGSEGV in CvDTreeTrainData::set_data

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Transferred from http://code.opencv.org/issues/3564

|| Greg Hazel on 2014-02-20 02:42
|| Priority: Normal
|| Affected: 2.4.8 (latest release)
|| Category: ml
|| Tracker: Bug
|| Difficulty: 
|| PR: 
|| Platform: x64 / Linux

SIGSEGV in CvDTreeTrainData::set_data

Particularly suspicious because of the "// TODO: memory corruption may be here" comment.

The data set is 31628 samples each with 99171 attributes. (it ran fine with 1000 samples, but sloowww)

Program received signal SIGSEGV, Segmentation fault.
<pre>
0x00007ffff774f663 in CvDTreeTrainData::set_data (this=0x63baf0, _train_data=0x7fffffffdb50, _tflag=<optimized out>, _responses=0x7fffffffdb80, 
    _var_idx=<optimized out>, _sample_idx=<optimized out>, _var_type=0x7fffffffdc10, _missing_mask=0x0, _params=..., _shared=true, _add_labels=false, 
    _update_data=false) at /home/ghazel/opencv-2.4.8/modules/ml/src/tree.cpp:557
557                         udst[i] = (unsigned short)i; // TODO: memory corruption may be here
(gdb) bt
#0  0x00007ffff774f663 in CvDTreeTrainData::set_data (this=0x63baf0, _train_data=0x7fffffffdb50, _tflag=<optimized out>, _responses=0x7fffffffdb80, 
    _var_idx=<optimized out>, _sample_idx=<optimized out>, _var_type=0x7fffffffdc10, _missing_mask=0x0, _params=..., _shared=true, _add_labels=false, 
    _update_data=false) at /home/ghazel/opencv-2.4.8/modules/ml/src/tree.cpp:557
opencv/opencv#1  0x00007ffff777d7b1 in CvRTrees::train (this=0x63ba90, _train_data=0x7fffffffdb50, _tflag=1, _responses=0x7fffffffdb80, _var_idx=0x0, _sample_idx=0x0, 
    _var_type=0x7fffffffdc10, _missing_mask=0x0, params=...) at /home/ghazel/opencv-2.4.8/modules/ml/src/rtrees.cpp:278
opencv/opencv#2  0x00007ffff777ce3b in CvRTrees::train (this=<optimized out>, _train_data=..., _tflag=<optimized out>, _responses=..., _var_idx=..., _sample_idx=..., 
    _var_type=..., _missing_mask=..., _params=...) at /home/ghazel/opencv-2.4.8/modules/ml/src/rtrees.cpp:846
opencv/opencv#3  0x00000000004017c0 in main (argc=2, argv=0x7fffffffe1f8) at rdf.cpp:116
</pre>

History

Alexander Karsakov on 2014-02-20 07:37

-   Description changed from Particularly suspicious because of the "//
    TODO: memory corruption may b... to Particularly suspicious because
    of the "// TODO: memory corruption may b... More
-   Assignee set to Maria Dimashova
-   Status changed from New to Open
-   Category set to ml