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ktls: Zero out TLS_GET_RECORD control messages

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Otherwise we end up copying one uninitialized byte into the socket
buffer.

Reported by:	KMSAN
Reviewed by:	jhb
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D33953
This commit is contained in:
Mark Johnston 2022-01-20 15:42:46 -05:00
parent d91d2b513e
commit 6be8944d96
2 changed files with 2 additions and 0 deletions
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1
sys/dev/cxgbe/tom/t4_tls.c
View file

@ -1052,6 +1052,7 @@ do_rx_tls_cmp(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m)
tgr = (struct tls_get_record *)
CMSG_DATA(mtod(control, struct cmsghdr *));
memset(tgr, 0, sizeof(*tgr));
tgr->tls_type = tls_hdr_pkt->type;
tgr->tls_vmajor = be16toh(tls_hdr_pkt->version) >> 8;
tgr->tls_vminor = be16toh(tls_hdr_pkt->version) & 0xff;

1
sys/kern/uipc_ktls.c
View file

@ -2066,6 +2066,7 @@ ktls_decrypt(struct socket *so)
}
/* Allocate the control mbuf. */
memset(&tgr, 0, sizeof(tgr));
tgr.tls_type = record_type;
tgr.tls_vmajor = hdr->tls_vmajor;
tgr.tls_vminor = hdr->tls_vminor;