tar: fix handling of tarballs with symlinks with size field != 0

1 files changed, 3 insertions, 1 deletions

diff --git a/archival/libunarchive/seek_by_jump.c b/archival/libunarchive/seek_by_jump.c
index 031598e7a..0a259c963 100644
--- a/archival/libunarchive/seek_by_jump.c
+++ b/archival/libunarchive/seek_by_jump.c
@@ -8,7 +8,9 @@
 
 void FAST_FUNC seek_by_jump(const archive_handle_t *archive_handle, unsigned amount)
 {
-        if (lseek(archive_handle->src_fd, (off_t) amount, SEEK_CUR) == (off_t) -1) {
+        if (amount
+         && lseek(archive_handle->src_fd, (off_t) amount, SEEK_CUR) == (off_t) -1
+        ) {
                 if (errno == ESPIPE)
                         seek_by_read(archive_handle, amount);
                 else