io_uring: don't assume mm is constant across submits

[linux-2.6-microblaze.git] / lib / decompress_unzstd.c

diff --git a/lib/decompress_unzstd.c b/lib/decompress_unzstd.c
index 0ad2c15..790abc4 100644 (file)
--- a/lib/decompress_unzstd.c
+++ b/lib/decompress_unzstd.c
@@ -178,8 +178,13 @@ static int INIT __unzstd(unsigned char *in_buf, long in_len,
        int err;
        size_t ret;
 
+       /*
+        * ZSTD decompression code won't be happy if the buffer size is so big
+        * that its end address overflows. When the size is not provided, make
+        * it as big as possible without having the end address overflow.
+        */
        if (out_len == 0)
-               out_len = LONG_MAX; /* no limit */
+               out_len = UINTPTR_MAX - (uintptr_t)out_buf;
 
        if (fill == NULL && flush == NULL)
                /*