Commit 6287f1a8 authored by Yuli Wang's avatar Yuli Wang Committed by Huacai Chen
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LoongArch: csum: Fix OoB access in IP checksum code for negative lengths 



Commit 69e3a6aa ("LoongArch: Add checksum optimization for 64-bit
system") would cause an undefined shift and an out-of-bounds read.

Commit 8bd795fe ("arm64: csum: Fix OoB access in IP checksum code
for negative lengths") fixes the same issue on ARM64.

Fixes: 69e3a6aa ("LoongArch: Add checksum optimization for 64-bit system")
Co-developed-by: default avatarWentao Guan <guanwentao@uniontech.com>
Signed-off-by: default avatarWentao Guan <guanwentao@uniontech.com>
Signed-off-by: default avatarYuli Wang <wangyuli@uniontech.com>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 6b72cd9e

arch/loongarch/lib/csum.c

+1 −1
Original line number Diff line number Diff line
@@ -25,7 +25,7 @@ unsigned int __no_sanitize_address do_csum(const unsigned char *buff, int len) 
	const u64 *ptr;

	u64 data, sum64 = 0;



	if (unlikely(len == 0))

	if (unlikely(len <= 0))

		return 0;



	offset = (unsigned long)buff & 7;