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authorTomas Mraz <tmraz@fedoraproject.org>2016-08-10 15:21:32 +0200
committerMatt Caswell <matt@openssl.org>2016-08-16 00:30:45 +0200
commite7e5d608fb6cef9929a2cf56d72fa7e236ca7573 (patch)
treed55b7a491b1a98cf2a6813950374d4523f408e58 /engines
parentFix af_alg engine failure on 32 bit architectures. (diff)
downloadopenssl-e7e5d608fb6cef9929a2cf56d72fa7e236ca7573.tar.xz
openssl-e7e5d608fb6cef9929a2cf56d72fa7e236ca7573.zip
Add a comment for the added cast with explanation.
Reviewed-by: Tim Hudson <tjh@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org>
Diffstat (limited to 'engines')
-rw-r--r--engines/afalg/e_afalg.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/engines/afalg/e_afalg.c b/engines/afalg/e_afalg.c
index 456ffda9aa..1766230ce8 100644
--- a/engines/afalg/e_afalg.c
+++ b/engines/afalg/e_afalg.c
@@ -230,6 +230,10 @@ 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;
cb->aio_offset = 0;
cb->aio_data = 0;