From 1466e065a94b3cd242f945f16c916a7f7da02985 Mon Sep 17 00:00:00 2001
From: WHR <whr@rivoreo.one>
Date: Wed, 1 May 2024 00:40:38 +0800
Subject: [PATCH] zfs: fix function 'zlib_decompress' pointlessly calling
 itself

In order to prevent crashing due to infinite recursion and actually
decompress the requested data, call the zlib function 'uncompress'
instead.

Signed-off-by: WHR <msl0000023508@gmail.com>
---
 fs/zfs/zfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/zfs/zfs.c b/fs/zfs/zfs.c
index 06221e68b3..9906d553fa 100644
--- a/fs/zfs/zfs.c
+++ b/fs/zfs/zfs.c
@@ -16,6 +16,7 @@
 #include <linux/time.h>
 #include <linux/ctype.h>
 #include <asm/byteorder.h>
+#include <u-boot/zlib.h>
 #include "zfs_common.h"
 #include "div64.h"
 
@@ -182,7 +183,8 @@ static int
 zlib_decompress(void *s, void *d,
 				uint32_t slen, uint32_t dlen)
 {
-	if (zlib_decompress(s, d, slen, dlen) < 0)
+	uLongf z_dest_len = dlen;
+	if (uncompress(d, &z_dest_len, s, slen) != Z_OK)
 		return ZFS_ERR_BAD_FS;
 	return ZFS_ERR_NONE;
 }
-- 
2.39.5