fix many unclosed file opened by open_image_ro

Many image files opened by open_image_ro weren't closed before return, fix
them all in this patch.

Signed-off-by: Huang Qiang <h.huangqiang@huawei.com>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -1199,8 +1199,10 @@ static int prepare_mm(pid_t pid, struct task_restore_core_args *args)
 	if (fd < 0)
 		return -1;
 
-	if (pb_read_one(fd, &mm, PB_MM) < 0)
+	if (pb_read_one(fd, &mm, PB_MM) < 0) {
+		close_safe(&fd);
 		return -1;
+	}
 
 	args->mm = *mm;
 	args->mm.n_mm_saved_auxv = 0;
@@ -1349,7 +1351,7 @@ static int sigreturn_restore(pid_t pid, CoreEntry *core, struct list_head *tgt_v
 	fd_pages = open_image_ro(CR_FD_PAGES, pid);
 	if (fd_pages < 0) {
 		pr_perror("Can't open pages-%d", pid);
-		goto err;
+		goto free;
 	}
 
 	restore_task_vma_len   = round_up(sizeof(*task_args), PAGE_SIZE);
@@ -1587,6 +1589,8 @@ static int sigreturn_restore(pid_t pid, CoreEntry *core, struct list_head *tgt_v
 		: "rsp", "rdi", "rsi", "rbx", "rax", "memory");
 
 err:
+	close_safe(&fd_pages);
+free:
 	free_mappings(&self_vma_list);
 
 	/* Just to be sure */

cr-show.c

@@ -476,6 +476,7 @@ static int cr_show_all(struct cr_options *opts)
 				pr_msg("----------------------------------------\n");
 
 				show_core(fd_th, opts);
+				close_safe(&fd_th);
 
 				pr_msg("----------------------------------------\n");
 

files-reg.c

@@ -86,14 +86,14 @@ static int open_remap_ghost(struct reg_file_info *rfi,
 		goto err;
 
 	if (pb_read_one(ifd, &gfe, PB_GHOST_FILE) < 0)
-		goto err;
+		goto close_ifd;
 
 	snprintf(gf->remap.path, PATH_MAX, "%s.cr.%x.ghost", rfi->path, rfe->remap_id);
 
 	if (S_ISFIFO(gfe->mode)) {
 		if (mknod(gf->remap.path, gfe->mode, 0)) {
 			pr_perror("Can't create node for ghost file\n");
-			goto err;
+			goto close_ifd;
 		}
 		ghost_flags = O_RDWR; /* To not block */
 	} else
@@ -102,17 +102,17 @@ static int open_remap_ghost(struct reg_file_info *rfi,
 	gfd = open(gf->remap.path, ghost_flags, gfe->mode);
 	if (gfd < 0) {
 		pr_perror("Can't open ghost file");
-		goto err;
+		goto close_ifd;
 	}
 
 	if (fchown(gfd, gfe->uid, gfe->gid) < 0) {
 		pr_perror("Can't reset user/group on ghost %#x\n", rfe->remap_id);
-		goto err;
+		goto close_all;
 	}
 
 	if (S_ISREG(gfe->mode)) {
 		if (copy_file(ifd, gfd, 0) < 0)
-			goto err;
+			goto close_all;
 	}
 
 	ghost_file_entry__free_unpacked(gfe, NULL);
@@ -127,6 +127,10 @@ gf_found:
 	rfi->remap = &gf->remap;
 	return 0;
 
+close_all:
+	close_safe(&gfd);
+close_ifd:
+	close_safe(&ifd);
 err:
 	if (gfe)
 		ghost_file_entry__free_unpacked(gfe, NULL);

files.c

@@ -576,20 +576,21 @@ int prepare_fs(int pid)
 	if (ifd < 0)
 		return -1;
 
-	if (pb_read_one(ifd, &fe, PB_FS) < 0)
+	if (pb_read_one(ifd, &fe, PB_FS) < 0) {
+		close_safe(&ifd);
 		return -1;
+	}
 
 	cwd = open_reg_by_id(fe->cwd_id);
-	if (cwd < 0)
+	if (cwd < 0) {
-		goto err;
+		close_safe(&ifd);
-
-	if (fchdir(cwd) < 0) {
-		pr_perror("Can't change root");
 		goto err;
 	}
 
-	close(cwd);
+	if (fchdir(cwd) < 0) {
-	close(ifd);
+		pr_perror("Can't change root");
+		goto close;
+	}
 
 	/*
 	 * FIXME: restore task's root. Don't want to do it now, since
@@ -601,6 +602,9 @@ int prepare_fs(int pid)
 	 */
 
 	ret = 0;
+close:
+	close_safe(&cwd);
+	close_safe(&ifd);
 err:
 	fs_entry__free_unpacked(fe, NULL);
 	return ret;

ipc_ns.c

@@ -611,7 +611,7 @@ static int prepare_ipc_sem_desc(int fd, const IpcSemEntry *entry)
 
 static int prepare_ipc_sem(int pid)
 {
-	int fd;
+	int fd, ret;
 
 	pr_info("Restoring IPC semaphores sets\n");
 	fd = open_image_ro(CR_FD_IPCNS_SEM, pid);
@@ -619,12 +619,13 @@ static int prepare_ipc_sem(int pid)
 		return -1;
 
 	while (1) {
-		int ret;
 		IpcSemEntry *entry;
 
 		ret = pb_read_one_eof(fd, &entry, PB_IPCNS_SEM);
-		if (ret < 0)
+		if (ret < 0) {
-			return -EIO;
+			ret = -EIO;
+			goto err;
+		}
 		if (ret == 0)
 			break;
 
@@ -635,10 +636,14 @@ static int prepare_ipc_sem(int pid)
 
 		if (ret < 0) {
 			pr_err("Failed to prepare semaphores set\n");
-			return ret;
+			goto err;
 		}
 	}
+
 	return close_safe(&fd);
+err:
+	close_safe(&fd);
+	return ret;
 }
 
 static int prepare_ipc_msg_queue_messages(int fd, const IpcMsgEntry *entry)
@@ -728,7 +733,7 @@ static int prepare_ipc_msg_queue(int fd, const IpcMsgEntry *entry)
 
 static int prepare_ipc_msg(int pid)
 {
-	int fd;
+	int fd, ret;
 
 	pr_info("Restoring IPC message queues\n");
 	fd = open_image_ro(CR_FD_IPCNS_MSG, pid);
@@ -736,13 +741,13 @@ static int prepare_ipc_msg(int pid)
 		return -1;
 
 	while (1) {
-		int ret;
 		IpcMsgEntry *entry;
 
 		ret = pb_read_one_eof(fd, &entry, PB_IPCNS_MSG_ENT);
 		if (ret < 0) {
 			pr_err("Failed to read IPC messages queue\n");
-			return -EIO;
+			ret = -EIO;
+			goto err;
 		}
 		if (ret == 0)
 			break;
@@ -754,10 +759,13 @@ static int prepare_ipc_msg(int pid)
 
 		if (ret < 0) {
 			pr_err("Failed to prepare messages queue\n");
-			return ret;
+			goto err;
 		}
 	}
 	return close_safe(&fd);
+err:
+	close_safe(&fd);
+	return ret;
 }
 
 static int prepare_ipc_shm_pages(int fd, const IpcShmEntry *shm)
@@ -822,7 +830,7 @@ static int prepare_ipc_shm_seg(int fd, const IpcShmEntry *shm)
 
 static int prepare_ipc_shm(int pid)
 {
-	int fd;
+	int fd, ret;
 
 	pr_info("Restoring IPC shared memory\n");
 	fd = open_image_ro(CR_FD_IPCNS_SHM, pid);
@@ -830,13 +838,13 @@ static int prepare_ipc_shm(int pid)
 		return -1;
 
 	while (1) {
-		int ret;
 		IpcShmEntry *shm;
 
 		ret = pb_read_one_eof(fd, &shm, PB_IPCNS_SHM);
 		if (ret < 0) {
 			pr_err("Failed to read IPC shared memory segment\n");
-			return -EIO;
+			ret = -EIO;
+			goto err;
 		}
 		if (ret == 0)
 			break;
@@ -848,10 +856,13 @@ static int prepare_ipc_shm(int pid)
 
 		if (ret < 0) {
 			pr_err("Failed to prepare shm segment\n");
-			return ret;
+			goto err;
 		}
 	}
 	return close_safe(&fd);
+err:
+	close_safe(&fd);
+	return ret;
 }
 
 static int prepare_ipc_var(int pid)
@@ -867,7 +878,8 @@ static int prepare_ipc_var(int pid)
 	ret = pb_read_one(fd, &var, PB_IPCNS_VAR);
 	if (ret <= 0) {
 		pr_err("Failed to read IPC namespace variables\n");
-		return -EFAULT;
+		ret = -EFAULT;
+		goto err;
 	}
 
 	ipc_sysctl_req(var, CTL_PRINT);
@@ -877,9 +889,13 @@ static int prepare_ipc_var(int pid)
 
 	if (ret < 0) {
 		pr_err("Failed to prepare IPC namespace variables\n");
-		return -EFAULT;
+		ret = -EFAULT;
+		goto err;
 	}
 	return close_safe(&fd);
+err:
+	close_safe(&fd);
+	return ret;
 }
 
 int prepare_ipc_ns(int pid)

mount.c

@@ -646,22 +646,22 @@ static int populate_mnt_ns(int ns_pid)
 		pr_debug("\t\tGetting root for %d\n", pm->mnt_id);
 		pm->root = xstrdup(me->root);
 		if (!pm->root)
-			return -1;
+			goto err;
 
 		pr_debug("\t\tGetting mpt for %d\n", pm->mnt_id);
 		pm->mountpoint = xstrdup(me->mountpoint);
 		if (!pm->mountpoint)
-			return -1;
+			goto err;
 
 		pr_debug("\t\tGetting source for %d\n", pm->mnt_id);
 		pm->source = xstrdup(me->source);
 		if (!pm->source)
-			return -1;
+			goto err;
 
 		pr_debug("\t\tGetting opts for %d\n", pm->mnt_id);
 		pm->options = xstrdup(me->options);
 		if (!pm->options)
-			return -1;
+			goto err;
 
 		pr_debug("\tRead %d mp @ %s\n", pm->mnt_id, pm->mountpoint);
 		pm->next = pms;
@@ -679,6 +679,9 @@ static int populate_mnt_ns(int ns_pid)
 		return -1;
 
 	return mnt_tree_for_each(pms, do_mount_one);
+err:
+	close_safe(&img);
+	return -1;
 }
 
 int prepare_mnt_ns(int ns_pid)

net.c

@@ -265,6 +265,7 @@ static int restore_links(int pid)
 	nlsk = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
 	if (nlsk < 0) {
 		pr_perror("Can't create nlk socket");
+		close_safe(&fd);
 		return -1;
 	}
 

sk-queue.c

@@ -227,28 +227,28 @@ int restore_sk_queue(int fd, unsigned int peer_id)
 
 		buf = xmalloc(entry->length);
 		if (buf ==NULL)
-			return -1;
+			goto err;
 
 		if (lseek(img_fd, pkt->img_off, SEEK_SET) == -1) {
 			pr_perror("lseek() failed");
 			xfree(buf);
-			return -1;
+			goto err;
 		}
 		if (read_img_buf(img_fd, buf, entry->length) != 1) {
 			xfree(buf);
-			return -1;
+			goto err;
 		}
 
 		ret = write(fd, buf, entry->length);
 		xfree(buf);
 		if (ret < 0) {
 			pr_perror("Failed to send packet");
-			return -1;
+			goto err;
 		}
 		if (ret != entry->length) {
 			pr_err("Restored skb trimmed to %d/%d\n",
 			       ret, (unsigned int)entry->length);
-			return -1;
+			goto err;
 		}
 		list_del(&pkt->list);
 		sk_packet_entry__free_unpacked(entry, NULL);
@@ -257,9 +257,12 @@ int restore_sk_queue(int fd, unsigned int peer_id)
 
 	if (fcntl(fd, F_SETFL, flags) ) {
 		pr_perror("Unable to restore flags for %d", fd);
-		return -1;
+		goto err;
 	}
 
 	close(img_fd);
 	return 0;
+err:
+	close_safe(&img_fd);
+	return -1;
 }