[PATCH 16/22] of: fdt: silence possible static analyzer false positive

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

clang-analyzer warns that aligning up newsize may end up causing an
overflow. Let's stop well before that by bailing out if the unaligned
size itself wouldn't fit into a malloc allocation anyway.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 drivers/of/fdt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 6c554af61f6f..43bb73b7a2df 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -378,6 +378,9 @@ static void *memalign_realloc(void *orig, size_t oldsize, size_t newsize)
 	int align;
 	void *newbuf;
 
+	if (newsize > MALLOC_MAX_SIZE)
+		return NULL;
+
 	/*
 	 * ARM Linux uses a single 1MiB section (with 1MiB alignment)
 	 * for mapping the devicetree, so we are not allowed to cross
-- 
2.39.5