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common/ompio: fix division by zero problem with empty fview #6705

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Merged
merged 1 commit into from
Jun 4, 2019
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common/ompio: fix division by zero problem with empty fview #6705

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11 changes: 9 additions & 2 deletions ompi/mca/common/ompio/common_ompio_file_open.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,8 @@
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2008-2017 University of Houston. All rights reserved.
* Copyright (c) 2015-2017 Research Organization for Information Science
* Copyright (c) 2008-2019 University of Houston. All rights reserved.
* Copyright (c) 2015-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2016 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2017 IBM Corporation. All rights reserved.
Expand Down Expand Up @@ -381,6 +381,13 @@ int mca_common_ompio_file_get_position (mca_io_ompio_file_t *fh,
{
OMPI_MPI_OFFSET_TYPE off;

if ( 0 == fh->f_view_extent ||
0 == fh->f_view_size ||
0 == fh->f_etype_size ) {
*offset = 0;
return OMPI_SUCCESS;
}

/* No. of copies of the entire file view */
off = (fh->f_offset - fh->f_disp)/fh->f_view_extent;

Expand Down