[PATCH] imsm: Fix possible memory leaks and refactor freeing struct dl

[Mateusz Grzonka <mateusz.grzonka@intel.com>]

Free memory allocated by structs dl and intel_super.
Allow __free_imsm_disk to decide if fd has to be closed and propagate it
across code instead of direct struct dl freeing.

Signed-off-by: Mateusz Grzonka <mateusz.grzonka@intel.com>
---
 super-intel.c | 39 +++++++++++++++++++--------------------
 1 file changed, 19 insertions(+), 20 deletions(-)

diff --git a/super-intel.c b/super-intel.c
index fe45d933..09e784d6 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -4535,9 +4535,9 @@ load_and_parse_mpb(int fd, struct intel_super *super, char *devname, int keep_fd
 	return err;
 }
 
-static void __free_imsm_disk(struct dl *d)
+static void __free_imsm_disk(struct dl *d, int close_fd)
 {
-	if (d->fd >= 0)
+	if (close_fd && d->fd > -1)
 		close(d->fd);
 	if (d->devname)
 		free(d->devname);
@@ -4554,17 +4554,17 @@ static void free_imsm_disks(struct intel_super *super)
 	while (super->disks) {
 		d = super->disks;
 		super->disks = d->next;
-		__free_imsm_disk(d);
+		__free_imsm_disk(d, 1);
 	}
 	while (super->disk_mgmt_list) {
 		d = super->disk_mgmt_list;
 		super->disk_mgmt_list = d->next;
-		__free_imsm_disk(d);
+		__free_imsm_disk(d, 1);
 	}
 	while (super->missing) {
 		d = super->missing;
 		super->missing = d->next;
-		__free_imsm_disk(d);
+		__free_imsm_disk(d, 1);
 	}
 
 }
@@ -5279,10 +5279,13 @@ static int load_super_imsm(struct supertype *st, int fd, char *devname)
 	free_super_imsm(st);
 
 	super = alloc_super();
-	if (!get_dev_sector_size(fd, NULL, &super->sector_size))
-		return 1;
 	if (!super)
 		return 1;
+
+	if (!get_dev_sector_size(fd, NULL, &super->sector_size)) {
+		free_imsm(super);
+		return 1;
+	}
 	/* Load hba and capabilities if they exist.
 	 * But do not preclude loading metadata in case capabilities or hba are
 	 * non-compliant and ignore_hw_compat is set.
@@ -5920,9 +5923,7 @@ static int add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
 	rv = imsm_read_serial(fd, devname, dd->serial, MAX_RAID_SERIAL_LEN);
 	if (rv) {
 		pr_err("failed to retrieve scsi serial, aborting\n");
-		if (dd->devname)
-			free(dd->devname);
-		free(dd);
+		__free_imsm_disk(dd, 0);
 		abort();
 	}
 
@@ -5936,10 +5937,7 @@ static int add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
 		if (!diskfd_to_devpath(fd, 2, pci_dev_path) ||
 		    !diskfd_to_devpath(fd, 1, cntrl_path)) {
 			pr_err("failed to get dev paths, aborting\n");
-
-			if (dd->devname)
-				free(dd->devname);
-			free(dd);
+			__free_imsm_disk(dd, 0);
 			return 1;
 		}
 
@@ -5975,15 +5973,16 @@ static int add_to_super_imsm(struct supertype *st, mdu_disk_info_t *dk,
 		    !imsm_orom_has_tpv_support(super->orom)) {
 			pr_err("\tPlatform configuration does not support non-Intel NVMe drives.\n"
 			       "\tPlease refer to Intel(R) RSTe/VROC user guide.\n");
-			free(dd->devname);
-			free(dd);
+			__free_imsm_disk(dd, 0);
 			return 1;
 		}
 	}
 
 	get_dev_size(fd, NULL, &size);
-	if (!get_dev_sector_size(fd, NULL, &member_sector_size))
+	if (!get_dev_sector_size(fd, NULL, &member_sector_size)) {
+		__free_imsm_disk(dd, 0);
 		return 1;
+	}
 
 	if (super->sector_size == 0) {
 		/* this a first device, so sector_size is not set yet */
@@ -9296,7 +9295,7 @@ static int remove_disk_super(struct intel_super *super, int major, int minor)
 			else
 				super->disks = dl->next;
 			dl->next = NULL;
-			__free_imsm_disk(dl);
+			__free_imsm_disk(dl, 1);
 			dprintf("removed %x:%x\n", major, minor);
 			break;
 		}
@@ -9346,7 +9345,7 @@ static int add_remove_disk_update(struct intel_super *super)
 				}
 			}
 			/* release allocate disk structure */
-			__free_imsm_disk(disk_cfg);
+			__free_imsm_disk(disk_cfg, 1);
 		}
 	}
 	return check_degraded;
@@ -10547,7 +10546,7 @@ static void imsm_delete(struct intel_super *super, struct dl **dlp, unsigned ind
 		struct dl *dl = *dlp;
 
 		*dlp = (*dlp)->next;
-		__free_imsm_disk(dl);
+		__free_imsm_disk(dl, 1);
 	}
 }
 
-- 
2.26.2

Intel Technology Poland sp. z o.o.
ul. Sowackiego 173 | 80-298 Gdask | Sd Rejonowy Gdask Pnoc | VII Wydzia Gospodarczy Krajowego Rejestru Sdowego - KRS 101882 | NIP 957-07-52-316 | Kapita zakadowy 200.000 PLN.
Ta wiadomo wraz z zacznikami jest przeznaczona dla okrelonego adresata i moe zawiera informacje poufne. W razie przypadkowego otrzymania tej wiadomoci, prosimy o powiadomienie nadawcy oraz trwae jej usunicie; jakiekolwiek przegldanie lub rozpowszechnianie jest zabronione.
This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited.