From: Huacai Chen Date: Sun, 3 Aug 2025 14:49:47 +0000 (+0800) Subject: LoongArch: Make relocate_new_kernel_size be a .quad value X-Git-Tag: io_uring-6.17-20250815~31^2~15 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=a1a81b5477196ca1290b367404a461e046e647d5;p=linux-block.git LoongArch: Make relocate_new_kernel_size be a .quad value 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 --- diff --git a/arch/loongarch/kernel/relocate_kernel.S b/arch/loongarch/kernel/relocate_kernel.S index 84e6de2fd973..8b5140ac9ea1 100644 --- a/arch/loongarch/kernel/relocate_kernel.S +++ b/arch/loongarch/kernel/relocate_kernel.S @@ -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)