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layout.c: Validate _layout_entry_by_name() arguments before use

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It may be the case that a layout could not be derived which
would result in layout logic being fed a NULL pointer. Validate
this case and be defensive to validate the name argument as well.

BUG=b:247055486
TEST=builds

Change-Id: I2a19c0e586f8575b8b3c2c02b5afad312efacfc9
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/67722
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
This commit is contained in:
Edward O'Callaghan 2022-09-20 14:22:48 +10:00 committed by Edward O'Callaghan
parent 7ed1337309
commit be0538f654
1 changed files with 2 additions and 0 deletions
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2
layout.c
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@ -58,6 +58,8 @@ static struct romentry *_layout_entry_by_name(
const struct flashrom_layout *const layout, const char *name)
{
struct romentry *entry = NULL;
if (!layout || !name)
return NULL;
while ((entry = mutable_layout_next(layout, entry))) {
if (!strcmp(entry->name, name))
return entry;