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Mutex leak in dsl_dataset_hold_obj()

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In addition to dsl_dataset_evict_async() releasing a hold, there is
an error case in dsl_dataset_hold_obj() which had missed 4 additional
release calls.  This was introduced in a1d477c24.

openzfsonosx-commit: https://github.com/openzfsonosx/zfs/commit/63ff7f1c

Authored by: Jorgen Lundman <lundman@lundman.net>
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Ported-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #8517
This commit is contained in:
Jorgen Lundman 2019-03-19 12:34:30 +09:00 committed by Brian Behlendorf
parent 45001b949c
commit d10b2f1d35
1 changed files with 4 additions and 0 deletions
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4
module/zfs/dsl_dataset.c
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@ -650,10 +650,14 @@ dsl_dataset_hold_obj(dsl_pool_t *dp, uint64_t dsobj, void *tag,
if (ds->ds_prev)
dsl_dataset_rele(ds->ds_prev, ds);
dsl_dir_rele(ds->ds_dir, ds);
list_destroy(&ds->ds_prop_cbs);
list_destroy(&ds->ds_sendstreams);
mutex_destroy(&ds->ds_lock);
mutex_destroy(&ds->ds_opening_lock);
mutex_destroy(&ds->ds_sendstream_lock);
mutex_destroy(&ds->ds_remap_deadlist_lock);
zfs_refcount_destroy(&ds->ds_longholds);
rrw_destroy(&ds->ds_bp_rwlock);
kmem_free(ds, sizeof (dsl_dataset_t));
if (err != 0) {
dmu_buf_rele(dbuf, tag);