4.19-stable review patch. If anyone has any objections, please let me know.
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From: Geert Uytterhoeven geert+renesas@glider.be
[ 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.172415612... Signed-off-by: Rob Herring (Arm) robh@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/of/irq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/of/irq.c b/drivers/of/irq.c index f06c9df60e34d..35d83888071ea 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -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);
/* Prevent out-of-bounds read in case of longer interrupt parent address size */ - if (addr_len > (3 * sizeof(__be32))) - addr_len = 3 * sizeof(__be32); + if (addr_len > sizeof(addr_buf)) + addr_len = sizeof(addr_buf); if (addr) memcpy(addr_buf, addr, addr_len);