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LoongArch: Make relocate_new_kernel_size be a .quad value

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Now relocate_new_kernel_size is a .long value, which means 32bit, so its
high 32bit is undefined. This causes memcpy((void *)reboot_code_buffer,
relocate_new_kernel, relocate_new_kernel_size) in machine_kexec_prepare()
access out of range memories in some cases, and then end up with an ADE
exception.

So make relocate_new_kernel_size be a .quad value, which means 64bit, to
avoid such errors.

Cc: stable@vger.kernel.org
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: maoxiaochuan <maoxiaochuan@loongson.cn>
This commit is contained in:
Huacai Chen
2025-11-10 08:55:33 +08:00
committed by maoxiaochuan
parent 43798dfb4a
commit 6309b1b0b6
1 changed files with 1 additions and 1 deletions
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arch/loongarch/kernel/relocate_kernel.S
+1 -1
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@@ -109,4 +109,4 @@ SYM_CODE_END(kexec_smp_wait)
relocate_new_kernel_end:
.section ".data"
SYM_DATA(relocate_new_kernel_size, .long relocate_new_kernel_end - relocate_new_kernel)
SYM_DATA(relocate_new_kernel_size, .quad relocate_new_kernel_end - relocate_new_kernel)