From: Bo YU <tsu.yubo@gmail.com>
Date: Tue, 30 Oct 2018 13:21:55 +0000 (-0400)
Subject: powerpc/boot: Fix missing check of lseek() return value
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=5d085ec04a000fefb5182d3b03ee46ca96d8389b;p=openwrt%2Fstaging%2Fblogic.git

powerpc/boot: Fix missing check of lseek() return value

This is detected by Coverity scan: CID: 1440481

Signed-off-by: Bo YU <tsu.yubo@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---

diff --git a/arch/powerpc/boot/addnote.c b/arch/powerpc/boot/addnote.c
index 9d9f6f334d3c..3da3e2b1b51b 100644
--- a/arch/powerpc/boot/addnote.c
+++ b/arch/powerpc/boot/addnote.c
@@ -223,7 +223,11 @@ main(int ac, char **av)
 	PUT_16(E_PHNUM, np + 2);
 
 	/* write back */
-	lseek(fd, (long) 0, SEEK_SET);
+	i = lseek(fd, (long) 0, SEEK_SET);
+	if (i < 0) {
+		perror("lseek");
+		exit(1);
+	}
 	i = write(fd, buf, n);
 	if (i < 0) {
 		perror("write");