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dm era: Fix bitset memory leaks 

commit 904e6b266619c2da5c58b5dce14ae30629e39645 upstream.

Deallocate the memory allocated for the in-core bitsets when destroying
the target and in error paths.

Fixes: eec40579d8 ("dm: add era target")
Cc: stable@vger.kernel.org # v3.15+
Signed-off-by: Nikos Tsironis <ntsironis@arrikto.com>
Reviewed-by: Ming-Hung Tsai <mtsai@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nikos Tsironis 2021-01-22 17:25:54 +02:00 committed by Greg Kroah-Hartman
parent 8ca89085fe
commit fead0c8e5c
1 changed files with 6 additions and 0 deletions
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6
drivers/md/dm-era-target.c
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@ -47,6 +47,7 @@ struct writeset {
static void writeset_free(struct writeset *ws)
{
vfree(ws->bits);
ws->bits = NULL;
}
static int setup_on_disk_bitset(struct dm_disk_bitset *info,
@ -811,6 +812,8 @@ static struct era_metadata *metadata_open(struct block_device *bdev,
static void metadata_close(struct era_metadata *md)
{
writeset_free(&md->writesets[0]);
writeset_free(&md->writesets[1]);
destroy_persistent_data_objects(md);
kfree(md);
}
@ -848,6 +851,7 @@ static int metadata_resize(struct era_metadata *md, void *arg)
r = writeset_alloc(&md->writesets[1], *new_size);
if (r) {
DMERR("%s: writeset_alloc failed for writeset 1", __func__);
writeset_free(&md->writesets[0]);
return r;
}
@ -858,6 +862,8 @@ static int metadata_resize(struct era_metadata *md, void *arg)
&value, &md->era_array_root);
if (r) {
DMERR("%s: dm_array_resize failed", __func__);
writeset_free(&md->writesets[0]);
writeset_free(&md->writesets[1]);
return r;
}