[osgeo4w-dev] [osgeo4w] #551: libnetcdf 4.4.1.1 crashes on netcdf v4 files with attributes of type string

[OSGeo4W]

#551: libnetcdf 4.4.1.1 crashes on netcdf v4 files with attributes of type string
--------------------+---------------------------
Reporter:  rouault  |      Owner:  osgeo4w-dev@…
    Type:  defect   |     Status:  new
Priority:  major    |  Component:  Package
 Version:           |   Keywords:
--------------------+---------------------------
 From https://trac.osgeo.org/gdal/ticket/7172

 There is a crash specific to the latest netcdf version in OSGeo4W
 (4.4.1.1), but cannot be reproduced with the previous one (4.3.0). It is
 also specific of netcdf v4 files that have at least one attribute of type
 "string"

 Given test.c

 {{{
 #include <netcdf.h>

 int main(int argc, char* argv[])
 {
     int cdfid = -1;
     nc_open(argv[1], NC_NOWRITE, &cdfid);
     nc_close(cdfid);
     return 0;
 }
 }}}

 compiled with "cl minimal.c /Ie:\osgeo4W64\include
 e:\OSGeo4W64\lib\netcdf.lib" (with VS 2015 64bit) and minimal.nc
 (attached) being a netcdf 4 file with just a variable of type string

 {{{
 $ ncdump /tmp/minimum.nc
 netcdf minimum {

 // global attributes:
                 string :Conventions = "CF-1.6" ;
 }
 }}}

 "minimum.exe minimal.nc" crashes. DrMemory output is

 {{{
 Error #1: INVALID HEAP ARGUMENT to free 0x00000000029c2830
 # 0 replace_free
 [d:\drmemory_package\common\alloc_replace.c:2706]
 # 1 hdf5.dll!H5Aexists                       +0xf8     (0x000007fef3219b59
 <hdf5.dll+0x9b59>)
 # 2 hdf5.dll!H5I_dec_ref                     +0xaf     (0x000007fef339f600
 <hdf5.dll+0x18f600>)
 # 3 netcdf.dll!nc_set_var_chunk_cache_ints   +0x9695   (0x000007feee823f86
 <netcdf.dll+0x43f86>)
 # 4 netcdf.dll!NC4_sync                      +0xb9d    (0x000007feee814a2e
 <netcdf.dll+0x34a2e>)
 # 5 netcdf.dll!nc_set_var_chunk_cache_ints   +0x215    (0x000007feee81ab06
 <netcdf.dll+0x3ab06>)
 # 6 netcdf.dll!cdRel2Iso                     +0x41d    (0x000007feee7f073e
 <netcdf.dll+0x1073e>)
 # 7 netcdf.dll!nc_set_var_chunk_cache_ints   +0x146b   (0x000007feee81bd5c
 <netcdf.dll+0x3bd5c>)
 # 8 netcdf.dll!nc_set_var_chunk_cache_ints   +0xe99    (0x000007feee81b78a
 <netcdf.dll+0x3b78a>)
 # 9 netcdf.dll!NC4_sync                      +0xab     (0x000007feee813f3c
 <netcdf.dll+0x33f3c>)
 #10 netcdf.dll!NC4_close                     +0x3c     (0x000007feee813aed
 <netcdf.dll+0x33aed>)
 #11 netcdf.dll!nc_close                      +0x23     (0x000007feee7e2994
 <netcdf.dll+0x2994>)
 #12 minimal.exe!?                            +0x0      (0x000000013f32103c
 <minimal.exe+0x103c>)
 #13 minimal.exe!?                            +0x0      (0x000000013f321255
 <minimal.exe+0x1255>)
 #14 KERNEL32.dll!BaseThreadInitThunk         +0xc      (0x0000000077a3652d
 <KERNEL32.dll+0x1652d>)
 Note: @0:00:00.491 in thread 3780
 Note: refers to -7 byte(s) beyond last valid byte in prior malloc
 Note: prev lower malloc:  0x00000000029c2830-0x00000000029c2837
 }}}

--
Ticket URL: <https://trac.osgeo.org/osgeo4w/ticket/551>
OSGeo4W <http://trac.osgeo.org/osgeo4w>
OSGeo4W is the Windows installer and package environment for the OSGeo stack.