diff options
| author | Benjamin Marzinski <bmarzins@redhat.com> | 2016-11-30 17:56:14 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-06 11:16:15 +0100 |
| commit | 701ec6e5cea7ed6508999a25934af807767fe545 (patch) | |
| tree | 80eb94a0453f04387a3a5bfdbd738ddbf31719bc /drivers/md | |
| parent | 85290a163b0661c2d7576c18ee49b32bf10ec32f (diff) | |
dm space map metadata: fix 'struct sm_metadata' leak on failed create
commit 314c25c56c1ee5026cf99c570bdfe01847927acb upstream.
In dm_sm_metadata_create() we temporarily change the dm_space_map
operations from 'ops' (whose .destroy function deallocates the
sm_metadata) to 'bootstrap_ops' (whose .destroy function doesn't).
If dm_sm_metadata_create() fails in sm_ll_new_metadata() or
sm_ll_extend(), it exits back to dm_tm_create_internal(), which calls
dm_sm_destroy() with the intention of freeing the sm_metadata, but it
doesn't (because the dm_space_map operations is still set to
'bootstrap_ops').
Fix this by setting the dm_space_map operations back to 'ops' if
dm_sm_metadata_create() fails when it is set to 'bootstrap_ops'.
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/persistent-data/dm-space-map-metadata.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/md/persistent-data/dm-space-map-metadata.c b/drivers/md/persistent-data/dm-space-map-metadata.c index 7e44005595c1..20557e2c60c6 100644 --- a/drivers/md/persistent-data/dm-space-map-metadata.c +++ b/drivers/md/persistent-data/dm-space-map-metadata.c @@ -775,17 +775,15 @@ int dm_sm_metadata_create(struct dm_space_map *sm, memcpy(&smm->sm, &bootstrap_ops, sizeof(smm->sm)); r = sm_ll_new_metadata(&smm->ll, tm); + if (!r) { + if (nr_blocks > DM_SM_METADATA_MAX_BLOCKS) + nr_blocks = DM_SM_METADATA_MAX_BLOCKS; + r = sm_ll_extend(&smm->ll, nr_blocks); + } + memcpy(&smm->sm, &ops, sizeof(smm->sm)); if (r) return r; - if (nr_blocks > DM_SM_METADATA_MAX_BLOCKS) - nr_blocks = DM_SM_METADATA_MAX_BLOCKS; - r = sm_ll_extend(&smm->ll, nr_blocks); - if (r) - return r; - - memcpy(&smm->sm, &ops, sizeof(smm->sm)); - /* * Now we need to update the newly created data structures with the * allocated blocks that they were built from. |