From 32614c9f026be20f0336df3053b91090dc53297f Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers3@gmail.com>
Date: Mon, 4 Aug 2014 21:16:46 -0500
Subject: [PATCH] read_wim_header(): Check return value of lseek()

---
 src/header.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/header.c b/src/header.c
index 57cea04f..e223ce9f 100644
--- a/src/header.c
+++ b/src/header.c
@@ -96,7 +96,9 @@ read_wim_header(WIMStruct *wim, struct wim_header *hdr)
 			/* Pipable WIM:  Use header at end instead, unless
 			 * actually reading from a pipe.  */
 			if (!in_fd->is_pipe) {
-				lseek(in_fd->fd, -WIM_HEADER_DISK_SIZE, SEEK_END);
+				ret = WIMLIB_ERR_READ;
+				if (-1 == lseek(in_fd->fd, -WIM_HEADER_DISK_SIZE, SEEK_END))
+					goto read_error;
 				ret = full_read(in_fd, &disk_hdr, sizeof(disk_hdr));
 				if (ret)
 					goto read_error;
-- 
2.43.0