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ieee1275: fix signed comparison

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This commit is contained in:
Vladimir Serbinenko
2016-02-23 08:57:31 +01:00
parent 1b782e902e
commit 94c56a4c65
1 changed files with 1 additions and 1 deletions
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2
grub-core/kern/ieee1275/mmap.c
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@@ -49,7 +49,7 @@ grub_machine_mmap_iterate (grub_memory_hook_t hook, void *hook_data)
sizeof available, &available_size))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"couldn't examine /memory/available property");
if (available_size > sizeof (available))
if (available_size < 0 || (grub_size_t) available_size > sizeof (available))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE,
"/memory response buffer exceeded");