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From 3c7b1fd9bb63d74ecd38b71ffc876dca3ac87a8b Mon Sep 17 00:00:00 2001
From: shixuantong <shixuantong@h-partners.com>
Date: Sat, 7 May 2022 17:04:46 +0800
Subject: [PATCH 2/2] fix memory leak
---
lib/libtar.h | 1 +
lib/util.c | 9 ++++++++-
lib/wrapper.c | 11 +++++++++++
libtar/libtar.c | 3 +++
4 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/lib/libtar.h b/lib/libtar.h
index 08a8e0f..8b00e93 100644
--- a/lib/libtar.h
+++ b/lib/libtar.h
@@ -285,6 +285,7 @@ int oct_to_int(char *oct);
/* integer to string-octal conversion, no NULL */
void int_to_oct_nonull(int num, char *oct, size_t octlen);
+void free_longlink_longname(struct tar_header th_buf);
/***** wrapper.c **********************************************************/
diff --git a/lib/util.c b/lib/util.c
index 11438ef..8a42e62 100644
--- a/lib/util.c
+++ b/lib/util.c
@@ -15,6 +15,7 @@
#include <stdio.h>
#include <sys/param.h>
#include <errno.h>
+#include <stdlib.h>
#ifdef STDC_HEADERS
# include <string.h>
@@ -160,4 +161,10 @@ int_to_oct_nonull(int num, char *oct, size_t octlen)
oct[octlen - 1] = ' ';
}
-
+void free_longlink_longname(struct tar_header th_buf)
+{
+ if (th_buf.gnu_longname != NULL)
+ free(th_buf.gnu_longname);
+ if (th_buf.gnu_longlink !=NULL)
+ free(th_buf.gnu_longlink);
+}
diff --git a/lib/wrapper.c b/lib/wrapper.c
index 2d3f5b9..9d2f3bf 100644
--- a/lib/wrapper.c
+++ b/lib/wrapper.c
@@ -36,7 +36,10 @@ tar_extract_glob(TAR *t, char *globname, char *prefix)
if (fnmatch(globname, filename, FNM_PATHNAME | FNM_PERIOD))
{
if (TH_ISREG(t) && tar_skip_regfile(t))
+ {
+ free_longlink_longname(t->th_buf);
return -1;
+ }
continue;
}
if (t->options & TAR_VERBOSE)
@@ -46,9 +49,13 @@ tar_extract_glob(TAR *t, char *globname, char *prefix)
else
strlcpy(buf, filename, sizeof(buf));
if (tar_extract_file(t, buf) != 0)
+ {
+ free_longlink_longname(t->th_buf);
return -1;
+ }
}
+ free_longlink_longname(t->th_buf);
return (i == 1 ? 0 : -1);
}
@@ -82,9 +89,13 @@ tar_extract_all(TAR *t, char *prefix)
"\"%s\")\n", buf);
#endif
if (tar_extract_file(t, buf) != 0)
+ {
+ free_longlink_longname(t->th_buf);
return -1;
+ }
}
+ free_longlink_longname(t->th_buf);
return (i == 1 ? 0 : -1);
}
diff --git a/libtar/libtar.c b/libtar/libtar.c
index ac339e7..b992abb 100644
--- a/libtar/libtar.c
+++ b/libtar/libtar.c
@@ -197,6 +197,7 @@ list(char *tarfile)
{
fprintf(stderr, "tar_skip_regfile(): %s\n",
strerror(errno));
+ free_longlink_longname(t->th_buf);
return -1;
}
}
@@ -218,10 +219,12 @@ list(char *tarfile)
if (tar_close(t) != 0)
{
+ free_longlink_longname(t->th_buf);
fprintf(stderr, "tar_close(): %s\n", strerror(errno));
return -1;
}
+ free_longlink_longname(t->th_buf);
return 0;
}
--
2.37.1
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