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From bc11451222cc77d8c1b4e752167adabd3c7f64c9 Mon Sep 17 00:00:00 2001
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From: Peter Jones <pjones@redhat.com>
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Date: Thu, 21 Jun 2018 13:33:26 -0400
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Subject: [PATCH 21/24] efiboot: Make the device node skipping code pass
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coverity.
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Signed-off-by: Peter Jones <pjones@redhat.com>
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---
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src/linux.c | 31 ++++++++++++++++++-------------
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1 file changed, 18 insertions(+), 13 deletions(-)
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diff --git a/src/linux.c b/src/linux.c
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index f919dee5b67..6d20c2dbe25 100644
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--- a/src/linux.c
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+++ b/src/linux.c
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@@ -308,7 +308,8 @@ struct device HIDDEN
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{
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struct device *dev;
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char *linkbuf = NULL, *tmpbuf = NULL;
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- unsigned int i, n = 0;
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+ int i = 0;
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+ unsigned int n = 0;
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int rc;
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size_t nmemb = (sizeof(dev_probes)
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@@ -432,9 +433,11 @@ struct device HIDDEN
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int last_successful_probe = -1;
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debug("searching for device nodes in %s", dev->link);
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- for (i = 0; dev_probes[i] && dev_probes[i]->parse; i++) {
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+ for (i = 0;
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+ dev_probes[i] && dev_probes[i]->parse && *current;
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+ i++) {
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struct dev_probe *probe = dev_probes[i];
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- ssize_t pos;
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+ int pos;
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if (!needs_root &&
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(probe->flags & DEV_PROVIDES_ROOT)) {
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@@ -471,24 +474,26 @@ struct device HIDDEN
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debug("dev_probes[i+1]: %p dev->interface_type: %d\n",
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dev_probes[i+1], dev->interface_type);
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if (dev_probes[i+1] == NULL && dev->interface_type == unknown) {
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- int new_pos = 0;
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- rc = sscanf(current, "%*[^/]/%n", &new_pos);
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+ pos = 0;
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+ rc = sscanf(current, "%*[^/]/%n", &pos;;
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if (rc < 0) {
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- efi_error(
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- "Cannot parse device link segment \"%s\"",
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- current);
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+slash_err:
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+ efi_error("Cannot parse device link segment \"%s\"", current);
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goto err;
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}
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+
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+ while (current[pos] == '/')
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+ pos += 1;
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+
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+ if (!current[pos])
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+ goto slash_err;
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+
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debug("Cannot parse device link segment \"%s\"", current);
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debug("Skipping to \"%s\"", current + pos);
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debug("This means we can only create abbreviated paths");
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- if (rc < 0)
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- goto err;
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- if (new_pos == 0)
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- goto err;
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dev->flags |= DEV_ABBREV_ONLY;
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i = last_successful_probe;
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- current += new_pos;
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+ current += pos;
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}
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}
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--
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2.17.1
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