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From bd609a59369574c95f7f31b15caae8bb86b71f39 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Tue, 12 Jun 2018 14:36:20 -0400
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Subject: [PATCH 04/17] Pacify some coverity nits.
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Coverity has trouble tracking data flow sometimes, and believes that
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sysfs_readlink() and read_sysfs_file() will sometimes return >= 0 when
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the buffer has not been filled out. This changes the check to also test
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for a NULL pointer, hopefully pacifying it.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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src/linux-pci.c | 2 +-
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src/linux.c | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/src/linux-pci.c b/src/linux-pci.c
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index 87878c39c94..0d2a90ab166 100644
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--- a/src/linux-pci.c
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+++ b/src/linux-pci.c
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@@ -166,7 +166,7 @@ parse_pci(struct device *dev, const char *current)
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tmp[devpart - current] = '\0';
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rc = sysfs_readlink(&linkbuf, "class/block/%s/driver", tmp);
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free(tmp);
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- if (rc < 0) {
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+ if (rc < 0 || !linkbuf) {
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efi_error("Could not find driver for pci device");
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return -1;
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}
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diff --git a/src/linux.c b/src/linux.c
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index c8d1b3a9285..fe45c6004b9 100644
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--- a/src/linux.c
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+++ b/src/linux.c
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@@ -356,7 +356,7 @@ struct device HIDDEN
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if (dev->part == -1) {
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rc = read_sysfs_file(&tmpbuf, "dev/block/%s/partition", dev->link);
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- if (rc < 0) {
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+ if (rc < 0 || !tmpbuf) {
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efi_error("device has no /partition node; not a partition");
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} else {
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rc = sscanf((char *)tmpbuf, "%d\n", &dev->part);
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--
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2.17.1
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