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authorNed Bass <[email protected]>2015-05-28 16:14:19 -0700
committerBrian Behlendorf <[email protected]>2015-06-05 12:41:17 -0700
commit5f8e1e850522ee5cd37366427da4b4101a71c8a8 (patch)
treee2d658d906c9287d008bc769ca7321e521d93f19 /include
parentd617648c7fc6904261f3ae8f2e3726c5c1838508 (diff)
dmu_objset_userquota_get_ids uses dn_bonus unsafely
The function dmu_objset_userquota_get_ids() checks and uses dn->dn_bonus outside of dn_struct_rwlock. If the dnode is being freed then the bonus dbuf may be in the process of getting evicted. In this case there is a race that may cause dmu_objset_userquota_get_ids() to access the dbuf after it has been destroyed. To prevent this, ensure that when we are using the bonus dbuf we are either holding a reference on it or have taken dn_struct_rwlock. Signed-off-by: Ned Bass <[email protected]> Signed-off-by: Brian Behlendorf <[email protected]> Closes #3443
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