[PATCH v2] CIPSO: Fix unaligned memory access in cipso_v4_gentag_hdr
From: Sergey Nazarov <hidden>
Date: 2021-03-05 08:07:41
Also in:
linux-security-module
Subsystem:
networking [general], networking [labeled] (netlabel, labeled ipsec, secmark), the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Paul Moore, Linus Torvalds
We need to use put_unaligned when writing 32-bit DOI value in cipso_v4_gentag_hdr to avoid unaligned memory access. v2: unneeded type cast removed as Ondrej Mosnacek suggested. Signed-off-by: Sergey Nazarov <redacted> --- net/ipv4/cipso_ipv4.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 471d33a..6e59902 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c@@ -1162,7 +1162,7 @@ static void cipso_v4_gentag_hdr(const structcipso_v4_doi *doi_def,
{
buf[0] = IPOPT_CIPSO;
buf[1] = CIPSO_V4_HDR_LEN + len;
- *(__be32 *)&buf[2] = htonl(doi_def->doi);
+ put_unaligned_be32(doi_def->doi, &buf[2]);
}
/**
--
1.8.3.1