[PATCH] drivers/net/slip: prevent data alignment fault

From 594e53fa4913b1cb6232dbcc73d905a94c0cae73 Mon Sep 17 00:00:00 2001
From: William Tambe <[email protected]>
Date: Sun, 1 Oct 2023 21:38:15 -0500
Subject: [PATCH] drivers/net/slip: prevent data alignment fault

Prevent data alignment fault on architectures which cannot
do unaligned memory access.
---
 drivers/net/slip/slhc.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/slip/slhc.c b/drivers/net/slip/slhc.c
index ba93bab948e0..08fd570a6d40 100644
--- a/drivers/net/slip/slhc.c
+++ b/drivers/net/slip/slhc.c
@@ -459,8 +459,8 @@ slhc_compress(struct slcompress *comp, unsigned
char *icp, int isize,
         *cpp = ocp;
         *cp++ = changes;
     }
-    *(__sum16 *)cp = csum;
-    cp += 2;
+    *cp++ = (char)(csum&0xff);
+    *cp++ = (char)((csum>>8)&0xff);
 /* deltaS is now the size of the change section of the compressed header */
     memcpy(cp,new_seq,deltaS);    /* Write list of deltas */
     memcpy(cp+deltaS,icp+hlen,isize-hlen);
@@ -534,7 +534,7 @@ slhc_uncompress(struct slcompress *comp, unsigned
char *icp, int isize)
     thp = &cs->cs_tcp;
     ip = &cs->cs_ip;

-    thp->check = *(__sum16 *)cp;
+    thp->check = (((__sum16)*cp)|(((__sum16)*(cp+1))<<8));
     cp += 2;

     thp->psh = (changes & TCP_PUSH_BIT) ? 1 : 0;
-- 
2.34.1