DAOS-19495 object: fix segfault on max epoch query in a transaction (… - #18890
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DAOS-19495 object: fix segfault on max epoch query in a transaction (…#18890mchaarawi wants to merge 1 commit into
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…18858) daos_obj_query_max_epoch() has neither dkey nor akey, but dc_tx_attach() cached it as a read with nr=1, so dc_tx_add_read() left dcsr_nr=1 while dcr_iods stayed NULL. The commit then crashed dereferencing dcr_iods in dc_tx_cpd_sub_reqs_size(). Record it as an object level read (nr=0) and force nr=0 whenever no dkey is given. Add DTX42 regression test. Signed-off-by: Mohamad Chaarawi <mohamad.chaarawi@hpe.com>
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Ticket title is 'SEGV seen in DTX operation involving daos_obj_query_max_epoch' |
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August 20, 2026 00:04
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…#18858)
daos_obj_query_max_epoch() has neither dkey nor akey, but dc_tx_attach() cached it as a read with nr=1, so dc_tx_add_read() left dcsr_nr=1 while dcr_iods stayed NULL. The commit then crashed dereferencing dcr_iods in dc_tx_cpd_sub_reqs_size(). Record it as an object level read (nr=0) and force nr=0 whenever no dkey is given. Add DTX42 regression test.
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