summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorDmitry Mastykin <dmastykin@astralinux.ru>2023-06-08 15:57:54 +0200
committerDavid S. Miller <davem@davemloft.net>2023-06-10 20:54:06 +0200
commitb403643d154d15176b060b82f7fc605210033edd (patch)
tree0197cdad58ee677b218e74f14cb5d62de5766cab
parentMerge branch 'octeontx2-af-fixes' (diff)
downloadlinux-b403643d154d15176b060b82f7fc605210033edd.tar.xz
linux-b403643d154d15176b060b82f7fc605210033edd.zip
netlabel: fix shift wrapping bug in netlbl_catmap_setlong()
There is a shift wrapping bug in this code on 32-bit architectures. NETLBL_CATMAP_MAPTYPE is u64, bitmap is unsigned long. Every second 32-bit word of catmap becomes corrupted. Signed-off-by: Dmitry Mastykin <dmastykin@astralinux.ru> Acked-by: Paul Moore <paul@paul-moore.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/netlabel/netlabel_kapi.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index 54c083003947..27511c90a26f 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -857,7 +857,8 @@ int netlbl_catmap_setlong(struct netlbl_lsm_catmap **catmap,
offset -= iter->startbit;
idx = offset / NETLBL_CATMAP_MAPSIZE;
- iter->bitmap[idx] |= bitmap << (offset % NETLBL_CATMAP_MAPSIZE);
+ iter->bitmap[idx] |= (NETLBL_CATMAP_MAPTYPE)bitmap
+ << (offset % NETLBL_CATMAP_MAPSIZE);
return 0;
}