import file-5.33-21.el8

SOURCES/file-5.33-fix-compression.patch

@@ -0,0 +1,42 @@
+diff --git a/src/compress.c b/src/compress.c
+index cb11303..5677412 100644
+--- a/src/compress.c
++++ b/src/compress.c
+@@ -723,25 +723,24 @@ uncompressbuf(int fd, size_t bytes_max, size_t method, const unsigned char *old,
+ 		rv = OKDATA;
+ 		if ((r = sread(fdp[STDOUT_FILENO][0], *newch, bytes_max, 0)) > 0)
+ 			break;
+-		DPRINTF("Read stdout failed %d (%s)\n", fdp[STDOUT_FILENO][0],
+-		    r != -1 ? strerror(errno) : "no data");
+-
+-		rv = ERRDATA;
+-		if (r == 0 &&
+-		    (r = sread(fdp[STDERR_FILENO][0], *newch, bytes_max, 0)) > 0)
+-		{
++		if (r < 0) {
++			rv = ERRDATA;
++			DPRINTF("Read stdout failed %d (%s)\n", fdp[STDOUT_FILENO][0],
++				strerror(errno));
++			goto err;
++		} else if ((r = sread(fdp[STDERR_FILENO][0], *newch, bytes_max, 0)) > 0){
++			rv = ERRDATA;
+ 			r = filter_error(*newch, r);
+ 			break;
+ 		}
+-		free(*newch);
+ 		if  (r == 0)
+-			rv = makeerror(newch, n, "Read failed, %s",
+-			    strerror(errno));
+-		else
+-			rv = makeerror(newch, n, "No data");
++			break;
++		free(*newch);
++		rv = ERRDATA;
++		rv = makeerror(newch, n, "Read stderr failed, %s",
++		    strerror(errno));
+ 		goto err;
+ 	}
+-
+ 	*n = r;
+ 	/* NUL terminate, as every buffer is handled here. */
+ 	(*newch)[*n] = '\0';

SPECS/file.spec

@@ -15,7 +15,7 @@
 Summary: A utility for determining file types
 Name: file
 Version: 5.33
-Release: 20%{?dist}
+Release: 21%{?dist}
 License: BSD
 Group: Applications/File
 Source0: ftp://ftp.astron.com/pub/file/file-%{version}.tar.gz
@@ -85,6 +85,9 @@ Patch21: file-5.33-other-languages.patch
 # fix heap-based buffer overflow in cdf_read_property_info() (CVE-2019-18218)
 Patch22: file-5.37-CVE-2019-18218.patch
 
+# not yet upstream (#2095828)
+Patch23: file-5.33-fix-compression.patch
+
 URL: http://www.darwinsys.com/file/
 Requires: file-libs = %{version}-%{release}
 BuildRequires: zlib-devel
@@ -255,6 +258,9 @@ cd %{py3dir}
 %endif
 
 %changelog
+* Wed Aug 17 2022 Vincent Mihalkovic <vmihalko@redhat.com> - 5.33-21
+- fix recognition (src/compress.c) of compressed empty files (#2095828)
+
 * Tue May 04 2021 Vincent Mihalkovic <vmihalko@redhat.com> - 5.33-20
 - rebuild (#1954434)