Date: Sat, 6 Apr 2013 11:54:42 +0000 (UTC) From: Martin Matuska <mm@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r249196 - head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs Message-ID: <201304061154.r36Bsg7A072677@svn.freebsd.org>
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Author: mm Date: Sat Apr 6 11:54:41 2013 New Revision: 249196 URL: http://svnweb.freebsd.org/changeset/base/249196 Log: Provide a fix for kernel panic if receiving recursive deduplicated streams. Problem reported to vendor. Illumos ZFS issues: 3692 Panic on zfs receive of a recursive deduplicated stream MFC after: 2 weeks Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c Sat Apr 6 10:39:38 2013 (r249195) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c Sat Apr 6 11:54:41 2013 (r249196) @@ -990,6 +990,7 @@ free_guid_map_onexit(void *arg) while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) { dsl_dataset_long_rele(gmep->gme_ds, gmep); + dsl_dataset_rele(gmep->gme_ds, gmep); kmem_free(gmep, sizeof (guid_map_entry_t)); } avl_destroy(ca); @@ -1691,15 +1692,15 @@ add_ds_to_guidmap(const char *name, avl_ err = dsl_pool_hold(name, FTAG, &dp); if (err != 0) return (err); - err = dsl_dataset_hold_obj(dp, snapobj, FTAG, &snapds); + gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP); + err = dsl_dataset_hold_obj(dp, snapobj, gmep, &snapds); if (err == 0) { - gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP); gmep->guid = snapds->ds_phys->ds_guid; gmep->gme_ds = snapds; avl_add(guid_map, gmep); dsl_dataset_long_hold(snapds, gmep); - dsl_dataset_rele(snapds, FTAG); - } + } else + kmem_free(gmep, sizeof (guid_map_entry_t)); dsl_pool_rele(dp, FTAG); return (err);
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