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lib: utils: fdt_fixup: avoid buffer overrun

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fdt_reserved_memory_fixup() uses filtered_order[PMP_COUNT]. The index
must not reach PMP_COUNT.

Fixes: 199189bd1c ("lib: utils: Mark only the largest region as reserved in FDT")
Addresses-Coverity-ID: 1536994 ("Out-of-bounds write")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Heinrich Schuchardt 2023-03-31 15:15:15 +02:00 • committed by Anup Patel
parent ee016a7bb0
commit 2868f26131
1 changed files with 1 additions and 1 deletions
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2
lib/utils/fdt/fdt_fixup.c
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@ -355,7 +355,7 @@ int fdt_reserved_memory_fixup(void *fdt)
if (reg->flags & SBI_DOMAIN_MEMREGION_SU_EXECUTABLE)
continue;
if (i > PMP_COUNT) {
if (i >= PMP_COUNT) {
sbi_printf("%s: Too many memory regions to fixup.\n",
__func__);
return SBI_ENOSPC;