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LoongArch: csum: Fix OoB access in IP checksum code for negative lengths

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Commit 69e3a6aa6b ("LoongArch: Add checksum optimization for 64-bit
system") would cause an undefined shift and an out-of-bounds read.

Commit 8bd795fedb ("arm64: csum: Fix OoB access in IP checksum code
for negative lengths") fixes the same issue on ARM64.

Fixes: 69e3a6aa6b ("LoongArch: Add checksum optimization for 64-bit system")
Co-developed-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Yuli Wang <wangyuli@uniontech.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Yuli Wang 2025-02-13 12:02:40 +08:00 • committed by Huacai Chen
parent 6b72cd9ef0
commit 6287f1a8c1
1 changed files with 1 additions and 1 deletions
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arch/loongarch/lib/csum.c
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@ -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;