COLL/UCC: Fix aborting with SIGSEGV when persistent request is failed #13440
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devreal
previously approved these changes
Oct 15, 2025
bosilca
previously approved these changes
Oct 15, 2025
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This requirements (aka |
Sergei-Lebedev
approved these changes
Oct 16, 2025
bosilca
approved these changes
Oct 16, 2025
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Please squash. |
Signed-off-by: Kento Hasegawa <hasegawa.kento@fujitsu.com>
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Thank you for your comment and reviews. |
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Would it be possible to create the corresponding PR for 5.x ? |
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Yes, we will create the corresponding PR for the 5.x version. |
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What
When non-blocking or persistent request is failed, MPI_Wait() aborts with SIGSEGV because .req_mpi_object.comm is NULL.
The ompi_errhandler_request_invoke() from the MPI_Wait() causes SIGSEGV by accessing
.req_mpi_object.comm->error_handler.How
Initialize .req_mpi_object.comm in COLL_UCC_GET_REQ() and COLL_UCC_GET_REQ_PERSISTENT() in coll_ucc_common.h.