[2.2] head_errlog: fix use-after-free #16306
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In the commit of the head_errlog feature we introduced a bug in dsl_dataset_promote_sync(): we may dereference origin_head and hds, both dereferencing ddpa after calling promote_sync() on ddpa. Closes: openzfs#16272 Signed-off-by: George Amanakis <[email protected]>
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Backport of #16273 for 2.2.
Motivation and Context
In the commit of the head_errlog feature we introduced a bug in dsl_dataset_promote_sync(): we may dereference origin_head and hds, both dereferencing ddpa after calling promote_sync() on ddpa.
Closes: #16272
Description
How Has This Been Tested?
Types of changes
Checklist:
Signed-off-by.