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From 3cdcc7ef32e90c411d7f4e14a896f9bf7afa4f29 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Wed, 10 Sep 2014 16:56:49 -0400
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Subject: [PATCH 17/18] Check lseek() for errors.
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Covscan.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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src/lib/gpt.c | 8 ++++++--
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1 file changed, 6 insertions(+), 2 deletions(-)
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diff --git a/src/lib/gpt.c b/src/lib/gpt.c
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index 67a8c41..fc2acf3 100644
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--- a/src/lib/gpt.c
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+++ b/src/lib/gpt.c
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@@ -221,6 +221,7 @@ read_lba(int fd, uint64_t lba, void *buffer, size_t bytes)
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void *iobuf;
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size_t iobuf_size;
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int rc;
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+ off_t new_offset;
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iobuf_size = lcm(bytes, sector_size);
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rc = posix_memalign(&iobuf, sector_size, iobuf_size);
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@@ -228,8 +229,11 @@ read_lba(int fd, uint64_t lba, void *buffer, size_t bytes)
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return rc;
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memset(iobuf, 0, bytes);
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-
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- lseek(fd, offset, SEEK_SET);
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+ new_offset = lseek(fd, offset, SEEK_SET);
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+ if (new_offset == (off_t)-1) {
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+ free(iobuf);
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+ return 0;
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+ }
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bytesread = read(fd, iobuf, iobuf_size);
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memcpy(buffer, iobuf, bytes);
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free(iobuf);
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--
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1.9.3
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