From 81c1a15eb4a273eabedfcc28eb6afa4b50cb8a46 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 30 Sep 2025 16:08:34 +0800 Subject: [PATCH] crypto: zstd - Fix compression bug caused by truncation Use size_t for the return value of zstd_compress_cctx as otherwise negative errors will be truncated to a positive value. Reported-by: Han Xu Fixes: f5ad93ffb541 ("crypto: zstd - convert to acomp") Signed-off-by: Herbert Xu Reviewed-by: David Sterba Tested-by: Han Xu Signed-off-by: Herbert Xu --- crypto/zstd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/zstd.c b/crypto/zstd.c index c2a19cb0879d..ac318d333b68 100644 --- a/crypto/zstd.c +++ b/crypto/zstd.c @@ -83,7 +83,7 @@ static void zstd_exit(struct crypto_acomp *acomp_tfm) static int zstd_compress_one(struct acomp_req *req, struct zstd_ctx *ctx, const void *src, void *dst, unsigned int *dlen) { - unsigned int out_len; + size_t out_len; ctx->cctx = zstd_init_cctx(ctx->wksp, ctx->wksp_size); if (!ctx->cctx)