File 0001-Complain-if-an-inc-recursive-path-is-not-right-for-i.patch of Package rsync.37809

From 962f8b90045ab331fc04c9e65f80f1a53e68243b Mon Sep 17 00:00:00 2001
From: Wayne Davison <wayned@samba.org>
Date: Wed, 31 Dec 2014 12:41:03 -0800
Subject: [PATCH] Complain if an inc-recursive path is not right for its dir.
 This ensures that a malicious sender can't use a just-sent symlink as a
 trasnfer path.

---
 NEWS    |  7 ++++++-
 flist.c | 22 ++++++++++++++++++++--
 io.c    |  2 +-
 main.c  |  4 ++--
 rsync.c |  2 +-
 5 files changed, 30 insertions(+), 7 deletions(-)

Index: rsync-3.1.0/flist.c
===================================================================
--- rsync-3.1.0.orig/flist.c	2016-01-04 14:40:05.107024736 +0100
+++ rsync-3.1.0/flist.c	2016-01-04 14:40:08.628079436 +0100
@@ -2425,8 +2425,9 @@ struct file_list *send_file_list(int f,
 	return flist;
 }
 
-struct file_list *recv_file_list(int f)
+struct file_list *recv_file_list(int f, int dir_ndx)
 {
+	const char *good_dirname = NULL;
 	struct file_list *flist;
 	int dstart, flags;
 	int64 start_read;
@@ -2482,6 +2483,23 @@ struct file_list *recv_file_list(int f)
 		flist_expand(flist, 1);
 		file = recv_file_entry(f, flist, flags);
 
+		if (inc_recurse) {
+			static const char empty_dir[] = "\0";
+			const char *cur_dir = file->dirname ? file->dirname : empty_dir;
+			if (relative_paths && *cur_dir == '/')
+				cur_dir++;
+			if (cur_dir != good_dirname) {
+				const char *d = dir_ndx >= 0 ? f_name(dir_flist->files[dir_ndx], NULL) : empty_dir;
+				if (strcmp(cur_dir, d) != 0) {
+					rprintf(FERROR,
+						"ABORTING due to invalid dir prefix from sender: %s (should be: %s)\n",
+						cur_dir, d);
+					exit_cleanup(RERR_PROTOCOL);
+				}
+				good_dirname = cur_dir;
+			}
+		}
+
 		if (S_ISREG(file->mode)) {
 			/* Already counted */
 		} else if (S_ISDIR(file->mode)) {
@@ -2602,7 +2620,7 @@ void recv_additional_file_list(int f)
 			rprintf(FINFO, "[%s] receiving flist for dir %d\n",
 				who_am_i(), ndx);
 		}
-		flist = recv_file_list(f);
+		flist = recv_file_list(f, ndx);
 		flist->parent_ndx = ndx;
 	}
 }
Index: rsync-3.1.0/io.c
===================================================================
--- rsync-3.1.0.orig/io.c	2016-01-04 14:40:05.107024736 +0100
+++ rsync-3.1.0/io.c	2016-01-04 14:40:08.629079451 +0100
@@ -1694,7 +1694,7 @@ void wait_for_receiver(void)
 				rprintf(FINFO, "[%s] receiving flist for dir %d\n",
 					who_am_i(), ndx);
 			}
-			flist = recv_file_list(iobuf.in_fd);
+			flist = recv_file_list(iobuf.in_fd, ndx);
 			flist->parent_ndx = ndx;
 #ifdef SUPPORT_HARD_LINKS
 			if (preserve_hard_links)
Index: rsync-3.1.0/main.c
===================================================================
--- rsync-3.1.0.orig/main.c	2016-01-04 14:40:05.108024751 +0100
+++ rsync-3.1.0/main.c	2016-01-04 14:40:08.629079451 +0100
@@ -1009,7 +1009,7 @@ static void do_server_recv(int f_in, int
 		filesfrom_fd = -1;
 	}
 
-	flist = recv_file_list(f_in);
+	flist = recv_file_list(f_in, -1);
 	if (!flist) {
 		rprintf(FERROR,"server_recv: recv_file_list error\n");
 		exit_cleanup(RERR_FILESELECT);
@@ -1183,7 +1183,7 @@ int client_run(int f_in, int f_out, pid_
 
 	if (write_batch && !am_server)
 		start_write_batch(f_in);
-	flist = recv_file_list(f_in);
+	flist = recv_file_list(f_in, -1);
 	if (inc_recurse && file_total == 1)
 		recv_additional_file_list(f_in);
 
Index: rsync-3.1.0/rsync.c
===================================================================
--- rsync-3.1.0.orig/rsync.c	2016-01-04 14:40:05.108024751 +0100
+++ rsync-3.1.0/rsync.c	2016-01-04 14:40:08.629079451 +0100
@@ -364,7 +364,7 @@ int read_ndx_and_attrs(int f_in, int f_o
 		}
 		/* Send all the data we read for this flist to the generator. */
 		start_flist_forward(ndx);
-		flist = recv_file_list(f_in);
+		flist = recv_file_list(f_in, ndx);
 		flist->parent_ndx = ndx;
 		stop_flist_forward();
 	}