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29 lines
1.0 KiB
Diff
29 lines
1.0 KiB
Diff
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From 0e4edc3a01f179337bb0bd0d31855dbce338a23e Mon Sep 17 00:00:00 2001
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From: Samuel Holland <samuel@sholland.org>
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Date: Sun, 30 Oct 2022 14:53:45 -0500
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Subject: [PATCH 22/90] fdt: Fix bounds check in devfdt_get_addr_index
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reg must contain enough cells for the entire next address/size pair
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after skipping `index` pairs. The previous code allows an out-of-bounds
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read when na + ns > 1.
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Series-to: Simon Glass <sjg@chromium.org>
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Fixes: 69b41388ba45 ("dm: core: Add a new api to get indexed device address")
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Signed-off-by: Samuel Holland <samuel@sholland.org>
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---
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drivers/core/fdtaddr.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/core/fdtaddr.c
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+++ b/drivers/core/fdtaddr.c
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@@ -43,7 +43,7 @@ fdt_addr_t devfdt_get_addr_index(const s
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}
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reg = fdt_getprop(gd->fdt_blob, offset, "reg", &len);
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- if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
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+ if (!reg || (len < ((index + 1) * sizeof(fdt32_t) * (na + ns)))) {
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debug("Req index out of range\n");
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return FDT_ADDR_T_NONE;
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}
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