[PATCH AUTOSEL 4.14 015/167] powerpc/boot: Fix missing check of lseek() return value

[Sasha Levin]

From: Bo YU <tsu.y...@gmail.com>

[ Upstream commit 5d085ec04a000fefb5182d3b03ee46ca96d8389b ]

This is detected by Coverity scan: CID: 1440481

Signed-off-by: Bo YU <tsu.y...@gmail.com>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 arch/powerpc/boot/addnote.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/boot/addnote.c b/arch/powerpc/boot/addnote.c
index 9d9f6f334d3cc..3da3e2b1b51bc 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");
-- 
2.20.1