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dm vdo: don't refer to dedupe_context after releasing it

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Clear the dedupe_context pointer in a data_vio whenever ownership of
the context is lost, so that vdo can't examine it accidentally.

Signed-off-by: Ken Raeburn <raeburn@redhat.com>
Signed-off-by: Matthew Sakai <msakai@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Ken Raeburn 2024-07-26 15:08:53 -04:00 committed by Mikulas Patocka
parent 47ac09b91b
commit 0808ebf2f8
1 changed files with 3 additions and 0 deletions
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3
drivers/md/dm-vdo/dedupe.c
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@ -729,6 +729,7 @@ static void process_update_result(struct data_vio *agent)
!change_context_state(context, DEDUPE_CONTEXT_COMPLETE, DEDUPE_CONTEXT_IDLE))
return;
agent->dedupe_context = NULL;
release_context(context);
}
@ -1648,6 +1649,7 @@ static void process_query_result(struct data_vio *agent)
if (change_context_state(context, DEDUPE_CONTEXT_COMPLETE, DEDUPE_CONTEXT_IDLE)) {
agent->is_duplicate = decode_uds_advice(context);
agent->dedupe_context = NULL;
release_context(context);
}
}
@ -2321,6 +2323,7 @@ static void timeout_index_operations_callback(struct vdo_completion *completion)
* send its requestor on its way.
*/
list_del_init(&context->list_entry);
context->requestor->dedupe_context = NULL;
continue_data_vio(context->requestor);
timed_out++;
}