diff options
| author | Justin T. Gibbs <[email protected]> | 2015-04-02 23:00:07 +1100 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2015-04-28 16:25:58 -0700 |
| commit | 6186e2975316e6693d576ab9eec8289c806e38a9 (patch) | |
| tree | 53b9a428499567c4a3ffa07cd0abbe1a4c4ec784 /module | |
| parent | 6ebebaceb1091142b81430291c610d79b6a3073e (diff) | |
Illumos 5592 - NULL pointer dereference in dsl_prop_notify_all_cb()
5592 NULL pointer dereference in dsl_prop_notify_all_cb()
Author: Justin T. Gibbs <[email protected]>
Reviewed by: Dan McDonald <[email protected]>
Reviewed by: Matthew Ahrens <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: Will Andrews <[email protected]>
Approved by: Robert Mustacchi <[email protected]>
References:
https://www.illumos.org/issues/5592
https://github.com/illumos/illumos-gate/commit/9d47dec
Ported-by: Chris Dunlop <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'module')
| -rw-r--r-- | module/zfs/dsl_dataset.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/module/zfs/dsl_dataset.c b/module/zfs/dsl_dataset.c index a5310edce..de2703868 100644 --- a/module/zfs/dsl_dataset.c +++ b/module/zfs/dsl_dataset.c @@ -354,8 +354,19 @@ dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx, boolean_t dsl_dataset_try_add_ref(dsl_pool_t *dp, dsl_dataset_t *ds, void *tag) { - return (dmu_buf_try_add_ref(ds->ds_dbuf, dp->dp_meta_objset, - ds->ds_object, DMU_BONUS_BLKID, tag)); + dmu_buf_t *dbuf = ds->ds_dbuf; + boolean_t result = B_FALSE; + + if (dbuf != NULL && dmu_buf_try_add_ref(dbuf, dp->dp_meta_objset, + ds->ds_object, DMU_BONUS_BLKID, tag)) { + + if (ds == dmu_buf_get_user(dbuf)) + result = B_TRUE; + else + dmu_buf_rele(dbuf, tag); + } + + return (result); } int |