gnu: ntfs-3g: Fix CVE-2019-9755.

* gnu/packages/patches/ntfs-3g-CVE-2019-9755.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/linux.scm (ntfs-3g)[source]: Use it.

3 files changed, 74 insertions, 0 deletions

diff --git a/gnu/local.mk b/gnu/local.mk
index 6c925f2328..586be80eb7 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1086,6 +1086,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/ngircd-handle-zombies.patch		\
   %D%/packages/patches/nss-increase-test-timeout.patch		\
   %D%/packages/patches/nss-pkgconfig.patch			\
+  %D%/packages/patches/ntfs-3g-CVE-2019-9755.patch		\
   %D%/packages/patches/nvi-assume-preserve-path.patch		\
   %D%/packages/patches/nvi-dbpagesize-binpower.patch		\
   %D%/packages/patches/nvi-db4.patch				\
diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index d547fb37b6..06bf8095be 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -3641,6 +3641,7 @@ from userspace.")
               (method url-fetch)
               (uri (string-append "https://tuxera.com/opensource/"
                                   "ntfs-3g_ntfsprogs-" version ".tgz"))
+              (patches (search-patches "ntfs-3g-CVE-2019-9755.patch"))
               (sha256
                (base32
                 "1mb228p80hv97pgk3myyvgp975r9mxq56c6bdn1n24kngcfh4niy"))
diff --git a/gnu/packages/patches/ntfs-3g-CVE-2019-9755.patch b/gnu/packages/patches/ntfs-3g-CVE-2019-9755.patch
new file mode 100644
index 0000000000..a7794aed47
--- /dev/null
+++ b/gnu/packages/patches/ntfs-3g-CVE-2019-9755.patch
@@ -0,0 +1,72 @@
+Fix CVE-2019-9755:
+
+https://security-tracker.debian.org/tracker/CVE-2019-9755
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9755
+
+Patch copied from upstream source repository:
+
+https://sourceforge.net/p/ntfs-3g/ntfs-3g/ci/85c1634a26faa572d3c558d4cf8aaaca5202d4e9/
+
+From 85c1634a26faa572d3c558d4cf8aaaca5202d4e9 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Jean-Pierre=20Andr=C3=A9?= <jean-pierre.andre@wanadoo.fr>
+Date: Wed, 19 Dec 2018 15:57:50 +0100
+Subject: [PATCH] Fixed reporting an error when failed to build the mountpoint
+
+The size check was inefficient because getcwd() uses an unsigned int
+argument.
+---
+ src/lowntfs-3g.c | 6 +++++-
+ src/ntfs-3g.c    | 6 +++++-
+ 2 files changed, 10 insertions(+), 2 deletions(-)
+
+diff --git a/src/lowntfs-3g.c b/src/lowntfs-3g.c
+index 993867fa..0660439b 100644
+--- a/src/lowntfs-3g.c
++++ b/src/lowntfs-3g.c
+@@ -4411,7 +4411,8 @@ int main(int argc, char *argv[])
+ 	else {
+ 		ctx->abs_mnt_point = (char*)ntfs_malloc(PATH_MAX);
+ 		if (ctx->abs_mnt_point) {
+-			if (getcwd(ctx->abs_mnt_point,
++			if ((strlen(opts.mnt_point) < PATH_MAX)
++			    && getcwd(ctx->abs_mnt_point,
+ 				     PATH_MAX - strlen(opts.mnt_point) - 1)) {
+ 				strcat(ctx->abs_mnt_point, "/");
+ 				strcat(ctx->abs_mnt_point, opts.mnt_point);
+@@ -4419,6 +4420,9 @@ int main(int argc, char *argv[])
+ 			/* Solaris also wants the absolute mount point */
+ 				opts.mnt_point = ctx->abs_mnt_point;
+ #endif /* defined(__sun) && defined (__SVR4) */
++			} else {
++				free(ctx->abs_mnt_point);
++				ctx->abs_mnt_point = (char*)NULL;
+ 			}
+ 		}
+ 	}
+diff --git a/src/ntfs-3g.c b/src/ntfs-3g.c
+index 6ce89fef..4e0912ae 100644
+--- a/src/ntfs-3g.c
++++ b/src/ntfs-3g.c
+@@ -4148,7 +4148,8 @@ int main(int argc, char *argv[])
+ 	else {
+ 		ctx->abs_mnt_point = (char*)ntfs_malloc(PATH_MAX);
+ 		if (ctx->abs_mnt_point) {
+-			if (getcwd(ctx->abs_mnt_point,
++			if ((strlen(opts.mnt_point) < PATH_MAX)
++			    && getcwd(ctx->abs_mnt_point,
+ 				     PATH_MAX - strlen(opts.mnt_point) - 1)) {
+ 				strcat(ctx->abs_mnt_point, "/");
+ 				strcat(ctx->abs_mnt_point, opts.mnt_point);
+@@ -4156,6 +4157,9 @@ int main(int argc, char *argv[])
+ 			/* Solaris also wants the absolute mount point */
+ 				opts.mnt_point = ctx->abs_mnt_point;
+ #endif /* defined(__sun) && defined (__SVR4) */
++			} else {
++				free(ctx->abs_mnt_point);
++				ctx->abs_mnt_point = (char*)NULL;
+ 			}
+ 		}
+ 	}
+-- 
+2.21.0
+