linux-kernel - [PATCH 5.4 027/102] riscv: Fix range looking for kernel image memblock

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Date:   Tue, 24 Mar 2020 14:10:19 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Alexandre Ghiti <alex@...ti.fr>,
        Anup Patel <anup@...infault.org>,
        Palmer Dabbelt <palmerdabbelt@...gle.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 027/102] riscv: Fix range looking for kernel image memblock

From: Alexandre Ghiti <alex@...ti.fr>

[ Upstream commit a160eed4b783d7b250a32f7e5787c9867abc5686 ]

When looking for the memblock where the kernel lives, we should check
that the memory range associated to the memblock entirely comprises the
kernel image and not only intersects with it.

Signed-off-by: Alexandre Ghiti <alex@...ti.fr>
Reviewed-by: Anup Patel <anup@...infault.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/riscv/mm/init.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 573463d1c799a..f5d813c1304da 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -98,7 +98,7 @@ void __init setup_bootmem(void)
 	for_each_memblock(memory, reg) {
 		phys_addr_t end = reg->base + reg->size;
 
-		if (reg->base <= vmlinux_end && vmlinux_end <= end) {
+		if (reg->base <= vmlinux_start && vmlinux_end <= end) {
 			mem_size = min(reg->size, (phys_addr_t)-PAGE_OFFSET);
 
 			/*
-- 
2.20.1