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of/irq: Refer to actual buffer size in of_irq_parse_one()

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[ Upstream commit 39ab331ab5d377a18fbf5a0e0b228205edfcc7f4 ]

Replace two open-coded calculations of the buffer size by invocations of
sizeof() on the buffer itself, to make sure the code will always use the
actual buffer size.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/817c0b9626fd30790fc488c472a3398324cfcc0c.1724156125.git.geert+renesas@glider.be
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Geert Uytterhoeven
2024-08-20 14:16:53 +02:00
committed by Greg Kroah-Hartman
parent 7d91358e81
commit 64bf240f2d
1 changed files with 2 additions and 2 deletions
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4
drivers/of/irq.c
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@@ -302,8 +302,8 @@ int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_ar
addr = of_get_property(device, "reg", &addr_len); addr = of_get_property(device, "reg", &addr_len);
/* Prevent out-of-bounds read in case of longer interrupt parent address size */ /* Prevent out-of-bounds read in case of longer interrupt parent address size */
if (addr_len > (3 * sizeof(__be32))) if (addr_len > sizeof(addr_buf))
addr_len = 3 * sizeof(__be32); addr_len = sizeof(addr_buf);
if (addr) if (addr)
memcpy(addr_buf, addr, addr_len); memcpy(addr_buf, addr, addr_len);