bianbu-repo-mirror/bianbu-linux-6.6
1
0
Fork 0
mirror of https://gitee.com/bianbu-linux/linux-6.6 synced 2025-04-24 14:07:52 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

netlabel: fix shift wrapping bug in netlbl_catmap_setlong()

Browse source 
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>
This commit is contained in:
Dmitry Mastykin 2023-06-08 16:57:54 +03:00 • committed by David S. Miller
parent 14df952604
commit b403643d15
1 changed files with 2 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

3
net/netlabel/netlabel_kapi.c
View file

@ -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;
}