queue-4.4/powerpc-boot-fix-missing-check-of-lseek-return-value.patch

   1 From 4dd85d768a56ed9a0a1a531d805329304a556600 Mon Sep 17 00:00:00 2001
   2 From: Bo YU <tsu.yubo@gmail.com>
   3 Date: Tue, 30 Oct 2018 09:21:55 -0400
   4 Subject: powerpc/boot: Fix missing check of lseek() return value
   5
   6 [ Upstream commit 5d085ec04a000fefb5182d3b03ee46ca96d8389b ]
   7
   8 This is detected by Coverity scan: CID: 1440481
   9
  10 Signed-off-by: Bo YU <tsu.yubo@gmail.com>
  11 Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
  12 Signed-off-by: Sasha Levin <sashal@kernel.org>
  13 ---
  14  arch/powerpc/boot/addnote.c | 6 +++++-
  15  1 file changed, 5 insertions(+), 1 deletion(-)
  16
  17 diff --git a/arch/powerpc/boot/addnote.c b/arch/powerpc/boot/addnote.c
  18 index 9d9f6f334d3cc..3da3e2b1b51bc 100644
  19 --- a/arch/powerpc/boot/addnote.c
  20 +++ b/arch/powerpc/boot/addnote.c
  21 @@ -223,7 +223,11 @@ main(int ac, char **av)
  22         PUT_16(E_PHNUM, np + 2);
  23
  24         /* write back */
  25 -       lseek(fd, (long) 0, SEEK_SET);
  26 +       i = lseek(fd, (long) 0, SEEK_SET);
  27 +       if (i < 0) {
  28 +               perror("lseek");
  29 +               exit(1);
  30 +       }
  31         i = write(fd, buf, n);
  32         if (i < 0) {
  33                 perror("write");
  34 --
  35 2.20.1
  36