Handle truncation in the middle of a GNU long linkname (#2422)

Thanks to gbdngb12 김동건 for reporting this.

Resolves Issue #2415

(cherry picked from commit 82912103214506316bd9990d73f33d743d55f570)

diff --git a/libarchive/archive_read_support_format_tar.c b/libarchive/archive_read_support_format_tar.c
index 4aaf1b90cebb4b177d8ec45c8f35366ecd876476..b1344ae57d4a1bd4d89dbaca5eab814bc308cd98 100644 (file)
--- a/libarchive/archive_read_support_format_tar.c
+++ b/libarchive/archive_read_support_format_tar.c
@@ -1146,7 +1146,9 @@ header_gnu_longlink(struct archive_read *a, struct tar *tar,
        struct archive_string linkpath;
        archive_string_init(&linkpath);
        err = read_body_to_string(a, tar, &linkpath, h, unconsumed);
-       archive_entry_set_link(entry, linkpath.s);
+       if (err == ARCHIVE_OK) {
+               archive_entry_set_link(entry, linkpath.s);
+       }
        archive_string_free(&linkpath);
        return (err);
 }