File tgt-Fix-gcc7-string-truncation-warnings.patch of Package tgt

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File tgt-Fix-gcc7-string-truncation-warnings.patch of Package tgt (Revision bc7eb50b5c8cc4f401cb17f3c2562eb6)

Currently displaying revision bc7eb50b5c8cc4f401cb17f3c2562eb6 , Show latest

From 2de8bebe132e3b998bf4848d0bd22b50367ad4b8 Mon Sep 17 00:00:00 2001
From: Lee Duncan <lduncan@suse.com>
Date: Sat, 16 Feb 2019 10:29:19 -0800
Subject: [PATCH] Fix gcc7 string truncation warnings.

Mostly, this is fixed by checking the legnth
of strings to be copied, making sure they will
fit where they are being copied to, and
erroring out if the copy will not fit. Then
we can just use strcpy(). We also use
scsi_sprintf() for copying to SCSI structures,
with their special requirements.
---
 usr/mgmt.c   | 9 +++++++--
 usr/smc.c    | 9 +++++++--
 usr/spc.c    | 9 ++++++---
 usr/tgtadm.c | 6 +++++-
 4 files changed, 25 insertions(+), 8 deletions(-)

diff --git a/usr/mgmt.c b/usr/mgmt.c
index de23f1469494..00a4e08c01dc 100644
--- a/usr/mgmt.c
+++ b/usr/mgmt.c
@@ -797,11 +797,16 @@ int ipc_init(void)
 		goto close_lock_fd;
 	}
 
-	snprintf(mgmt_path, sizeof(mgmt_path), "%s.%d", path, control_port);
+	snprintf(mgmt_path, sizeof(mgmt_path) - 1, "%s.%d", path, control_port);
+	if (strlen(mgmt_path) > (sizeof(addr.sun_path) - 1)) {
+		eprintf("managment path too long: %s\n", mgmt_path);
+		goto close_ipc_fd;
+	}
 	unlink(mgmt_path);
 	memset(&addr, 0, sizeof(addr));
 	addr.sun_family = AF_LOCAL;
-	strncpy(addr.sun_path, mgmt_path, sizeof(addr.sun_path));
+	/* no need for strncpy because we already checked length */
+	strcpy(addr.sun_path, mgmt_path);
 
 	err = bind(fd, (struct sockaddr *) &addr, sizeof(addr));
 	if (err) {
diff --git a/usr/smc.c b/usr/smc.c
index b80aba272909..bbc7b7fc7b88 100644
--- a/usr/smc.c
+++ b/usr/smc.c
@@ -732,8 +732,13 @@ static tgtadm_err config_slot(struct scsi_lu *lu, struct tmp_param *tmp)
 			adm_err = TGTADM_SUCCESS;
 			break;
 		}
-		strncpy(s->barcode, tmp->barcode, sizeof(s->barcode));
-		strncpy(s->volume_tag, tmp->volume_tag, sizeof(s->volume_tag));
+		if (strlen(tmp->barcode) > sizeof(s->barcode) ||
+		    strlen(tmp->volume_tag) > sizeof(s->volume_tag)) {
+			eprintf("barcode or volume tag too large?");
+			break;
+		}
+		strcpy(s->barcode, tmp->barcode);
+		strcpy(s->volume_tag, tmp->volume_tag);
 		set_slot_full(s, 0, NULL);
 		adm_err = TGTADM_SUCCESS;
 		break;
diff --git a/usr/spc.c b/usr/spc.c
index 82a6ec9ee863..902d5bf4a60b 100644
--- a/usr/spc.c
+++ b/usr/spc.c
@@ -289,9 +289,12 @@ int spc_inquiry(int host_no, struct scsi_cmd *cmd)
 		data[7] = 0x02;
 
 		memset(data + 8, 0x20, 28);
-		strncpy((char *)data + 8, attrs->vendor_id, VENDOR_ID_LEN);
-		strncpy((char *)data + 16, attrs->product_id, PRODUCT_ID_LEN);
-		strncpy((char *)data + 32, attrs->product_rev, PRODUCT_REV_LEN);
+		scsi_sprintf((char *)data + 8, VENDOR_ID_LEN, "%-*s",
+			     VENDOR_ID_LEN, attrs->vendor_id);
+		scsi_sprintf((char *)data + 16, PRODUCT_ID_LEN, "%-*s",
+			     PRODUCT_ID_LEN, attrs->product_id);
+		scsi_sprintf((char *)data + 32, PRODUCT_REV_LEN, "%-*s",
+			     PRODUCT_REV_LEN, attrs->product_rev);
 
 		desc = (uint16_t *)(data + 58);
 		for (i = 0; i < ARRAY_SIZE(attrs->version_desc); i++)
diff --git a/usr/tgtadm.c b/usr/tgtadm.c
index 5572c3888a80..cb3eb1cd126f 100644
--- a/usr/tgtadm.c
+++ b/usr/tgtadm.c
@@ -224,7 +224,11 @@ static int ipc_mgmt_connect(int *fd)
 	snprintf(mgmt_path, sizeof(mgmt_path), "%s.%d",
 			 path, control_port);
 
-	strncpy(addr.sun_path, mgmt_path, sizeof(addr.sun_path));
+	if (strlen(mgmt_path) > (sizeof(addr.sun_path) - 1)) {
+		eprintf("management path too long: %s\n", mgmt_path);
+		return EINVAL;
+	}
+	strcpy(addr.sun_path, mgmt_path);
 
 	err = connect(*fd, (struct sockaddr *) &addr, sizeof(addr));
 	if (err < 0)
-- 
2.16.4

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File tgt-Fix-gcc7-string-truncation-warnings.patch of Package tgt (Revision bc7eb50b5c8cc4f401cb17f3c2562eb6)

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