Possible infinite loop in v.in.dxf (present in 6.4.3RC2)

[RikSaunderson]

Hi there,

In the file dxf_to_vect.c, which is part of v.in.dxf, there is a potential infinite loop. The code is as follows (lines 23-29, in function int dxf_to_vect(struct dxf_file *dxf, struct Map_info *Map)):

while (code != 0) {

if (code == -2) /* EOF */

return -1;

/* only looking for header groups (code == 9) */

if (code != 9)

continue;

...

value of code is modified down here

}

This snippet is looking for the Id of a header section of a DXF file. An Id of 9 denotes the header of the file, other Ids represent other things.

If a corrupted DXF file is input, or a completely different type of file which is not a DXF file but superficially looks like one, then this could result in an infinite loop. If the value of code is, for example, 5 the first time we enter this loop, then the loop will never terminate.

[hcho]

Fixed in trunk r55641 and r55642.

[neteler]

Fixed in trunk r55641 and r55642.

There is furthermore also r55644. Reopening since backport is needed.

[hcho]

Fixed in develbranch_6 (r58720) and releasebranch_6_4 (r58721).