dm raid: fix ctr memory leaks on error paths

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 109d698d17041703d014923a5a8be66ba9b7bda3..2fb5a9bff1bbd9113142ce421515154726ef0d04 100644 (file)
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -2738,7 +2738,7 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
         */
        r = rs_set_dev_and_array_sectors(rs, false);
        if (r)
-               return r;
+               goto bad;
 
        calculated_dev_sectors = rs->dev[0].rdev.sectors;
 
@@ -2769,20 +2769,23 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
                if (rs_is_raid6(rs) &&
                    test_bit(__CTR_FLAG_NOSYNC, &rs->ctr_flags)) {
                        ti->error = "'nosync' not allowed for new raid6 set";
-                       return -EINVAL;
+                       r = -EINVAL;
+                       goto bad;
                }
                rs_setup_recovery(rs, 0);
        } else if (rs_is_recovering(rs) || rs_is_reshaping(rs)) {
                /* Have to reject size change request during recovery/reshape */
                if (calculated_dev_sectors != rs->dev[0].rdev.sectors) {
                        ti->error = "Can't resize a recovering/reshaping raid set";
-                       return -EPERM;
+                       r = -EPERM;
+                       goto bad;
                }
                /* skip setup rs */
        } else if (rs_takeover_requested(rs)) {
                if (rs_is_reshaping(rs)) {
                        ti->error = "Can't takeover a reshaping raid set";
-                       return -EPERM;
+                       r = -EPERM;
+                       goto bad;
                }
 
                /*
@@ -2792,11 +2795,11 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
                 */
                r = rs_check_takeover(rs);
                if (r)
-                       return r;
+                       goto bad;
 
                r = rs_setup_takeover(rs);
                if (r)
-                       return r;
+                       goto bad;
 
                set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags);
                set_bit(RT_FLAG_KEEP_RS_FROZEN, &rs->runtime_flags);
@@ -2804,7 +2807,8 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
        } else if (rs_reshape_requested(rs)) {
                if (rs_is_reshaping(rs)) {
                        ti->error = "raid set already reshaping!";
-                       return -EPERM;
+                       r = -EPERM;
+                       goto bad;
                }
 
                if (rs_is_raid10(rs)) {
@@ -2820,7 +2824,8 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
                                 */
                                if (rs->raid_disks % rs->raid10_copies) {
                                        ti->error = "Can't reshape raid10 mirror groups";
-                                       return -EINVAL;
+                                       r = -EINVAL;
+                                       goto bad;
                                }
 
                                /* Userpace reordered disks to add/remove mirrors -> adjust raid_disk indexes */
@@ -2865,7 +2870,7 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
        /* If constructor requested it, change data and new_data offsets */
        r = rs_adjust_data_offsets(rs);
        if (r)
-               return r;
+               goto bad;
 
        /* Start raid set read-only and assumed clean to change in raid_resume() */
        rs->md.ro = 1;
@@ -2899,7 +2904,7 @@ static int raid_ctr(struct dm_target *ti, unsigned argc, char **argv)
        if (test_bit(RT_FLAG_RESHAPE_RS, &rs->runtime_flags)) {
                r = rs_check_reshape(rs);
                if (r)
-                       return r;
+                       goto bad_check_reshape;
 
                /* Restore new, ctr requested layout to perform check */
                rs_config_restore(rs, &rs_layout);