Bug fix: Multi-session emulation was not recognized with non-zero partition offset

libisoburn/isofs_wrap.c

@@ -478,8 +478,8 @@ static int isoburn_inspect_partition(struct isoburn *o, uint32_t img_size,
    {ret= 2; goto ex;} /* No room for volume descriptors */
  offst/= 4;
  numsec/= 4;
- if(offst + numsec != img_size)
-   {ret= 2; goto ex;} /* Partition end does not match image end */
+ if(offst + numsec > img_size)
+   {ret= 2; goto ex;} /* Partition end exceeds image end */
 
  /* Is there a PVD at the partition start ? */
  ret = burn_read_data(o->drive, (off_t) (offst + 16) * (off_t) 2048,
@@ -493,8 +493,8 @@ static int isoburn_inspect_partition(struct isoburn *o, uint32_t img_size,
      || pvm->file_structure_version[0] != 1 )
    {ret= 2; goto ex;} /* failed sanity check */
 
- if(iso_read_lsb(pvm->vol_space_size, 4) + offst != img_size)
-   {ret= 2; goto ex;} /* Image ends do not match */
+ if(iso_read_lsb(pvm->vol_space_size, 4) + offst > img_size)
+   {ret= 2; goto ex;} /* Image ends do not match plausibly */
 
  /* Now it is credible. Not yet clear is whether it is acceptable. */
  o->loaded_partition_offset= offst;