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nvmet-fc: check successful reference in nvmet_fc_find_target_assoc 

When searching for an association based on an association id, when there
is a match, the code takes a reference. However, it is not validating
that the reference taking was successful.

Check the status of the reference. If unsuccessful, the device is being
deleted and should be ignored.

Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
James Smart 2020-07-24 09:40:00 -07:00 committed by Christoph Hellwig
parent 237480760c
commit 34efa23234
1 changed files with 2 additions and 1 deletions
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3
drivers/nvme/target/fc.c
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@ -1243,7 +1243,8 @@ nvmet_fc_find_target_assoc(struct nvmet_fc_tgtport *tgtport,
list_for_each_entry(assoc, &tgtport->assoc_list, a_list) {
if (association_id == assoc->association_id) {
ret = assoc;
nvmet_fc_tgt_a_get(assoc);
if (!nvmet_fc_tgt_a_get(assoc))
ret = NULL;
break;
}
}