From: Tomas Mraz <tmraz@fedoraproject.org>
Date: Mon, 15 Aug 2016 10:02:06 +0000 (+0200)
Subject: Avoid truncating the pointer on x32 platform.
X-Git-Tag: OpenSSL_1_1_0~189
X-Git-Url: https://git.openssl.org/?p=openssl.git;a=commitdiff_plain;h=40c60b0d7389aa479cf7474a080737e901944d0d

Avoid truncating the pointer on x32 platform.

The 64 bit pointer must not be cast to 32bit unsigned long on
x32 platform.

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
---

diff --git a/engines/afalg/e_afalg.c b/engines/afalg/e_afalg.c
index 1766230ce8..2ea5ba5232 100644
--- a/engines/afalg/e_afalg.c
+++ b/engines/afalg/e_afalg.c
@@ -230,11 +230,15 @@ int afalg_fin_cipher_aio(afalg_aio *aio, int sfd, unsigned char *buf,
     memset(cb, '\0', sizeof(*cb));
     cb->aio_fildes = sfd;
     cb->aio_lio_opcode = IOCB_CMD_PREAD;
-    /*
-     * The pointer has to be converted to unsigned value first to avoid
-     * sign extension on cast to 64 bit value
-     */
-    cb->aio_buf = (uint64_t)(unsigned long)buf;
+    if (sizeof(buf) != sizeof(cb->aio_buf)) {
+        /*
+         * The pointer has to be converted to 32 bit unsigned value first
+         * to avoid sign extension on cast to 64 bit value
+         */
+        cb->aio_buf = (uint64_t)(unsigned long)buf;
+    } else {
+        cb->aio_buf = (uint64_t)buf;
+    }
     cb->aio_offset = 0;
     cb->aio_data = 0;
     cb->aio_nbytes = len;