Fix a bug in Subfiling VFD vector I/O setup #4821
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jhendersonHDF
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Merge - To 1.14
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Fixes a bug where the vector I/O sizes weren't being extended when one of the entries in the array is 0. This caused an over-read of the I/O sizes buffer and on some machines would cause a memory allocation failure due to the calculated I/O vector size being too large.
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Will add a release note after checking testing on an HPC machine. The current testing in t_vfd.c wasn't generally catching this as the I/O sizes array was allocated on the stack and passed in. The buffer over-read was then usually reading valid memory for the process. Adding a test with an array allocated on the heap has a much better chance of triggering the issue. |
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MPI_TEST_t_vfd and 2930 other tests all passed on frontier, testing the subfiling_vector_io_bugfix branch with gcc-native/13.2 compiler: https://my.cdash.org/builds/2656168. The test has been failing consistently in this configuration. |
qkoziol
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Sep 11, 2024
lrknox
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Sep 12, 2024
lrknox
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Sep 13, 2024
Fixes a bug where the vector I/O sizes weren't being extended when one of the entries in the array is 0. This caused an over-read of the I/O sizes buffer and on some machines would cause a memory allocation failure due to the calculated I/O vector size being too large.
derobins
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Sep 16, 2024
* Convert exec_program to execute_process (#4819) * Fix a bug in Subfiling VFD vector I/O setup (#4821) Fixes a bug where the vector I/O sizes weren't being extended when one of the entries in the array is 0. This caused an over-read of the I/O sizes buffer and on some machines would cause a memory allocation failure due to the calculated I/O vector size being too large. * Add release note for signed binaries (#4826) * Draw attention to 3rd step in process to update so numbers for release. (#4825) * Update RESULT_VARIABLE
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Fixes a bug where the vector I/O sizes weren't being extended when one of the entries in the array is 0. This caused an overread of the I/O sizes buffer and on some machines would cause a memory allocation failure due to the calculated I/O vector size being too large.