[PATCH 5.4 034/141] sctp: Fix out-of-bounds warning in sctp_process_asconf_param()
From: Greg Kroah-Hartman
Date: Mon May 17 2021 - 10:54:42 EST
From: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
[ Upstream commit e5272ad4aab347dde5610c0aedb786219e3ff793 ]
Fix the following out-of-bounds warning:
net/sctp/sm_make_chunk.c:3150:4: warning: 'memcpy' offset [17, 28] from the object at 'addr' is out of the bounds of referenced subobject 'v4' with type 'struct sockaddr_in' at offset 0 [-Warray-bounds]
This helps with the ongoing efforts to globally enable -Warray-bounds
and get us closer to being able to tighten the FORTIFY_SOURCE routines
on memcpy().
Link: https://github.com/KSPP/linux/issues/109
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Gustavo A. R. Silva <gustavoars@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/sctp/sm_make_chunk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index d5eda966a706..4ffb9116b6f2 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -3134,7 +3134,7 @@ static __be16 sctp_process_asconf_param(struct sctp_association *asoc,
* primary.
*/
if (af->is_any(&addr))
- memcpy(&addr.v4, sctp_source(asconf), sizeof(addr));
+ memcpy(&addr, sctp_source(asconf), sizeof(addr));
if (security_sctp_bind_connect(asoc->ep->base.sk,
SCTP_PARAM_SET_PRIMARY,
--
2.30.2