When I introduced open perms policy didn't understand them and I implemented them as a policycap. When I added the checking of open perm to truncate I forgot to conditionalize it on the userspace defined policy capability. Running an old policy with a new kernel will not check open on open(2) but will check it on truncate. Conditionalize the truncate check the same as the open check. Signed-off-by: Eric Paris <eparis@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # 3.4.x --- security/selinux/hooks.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index e94349b..ac9e7099 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2709,7 +2709,7 @@ static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr) ATTR_ATIME_SET | ATTR_MTIME_SET | ATTR_TIMES_SET)) return dentry_has_perm(cred, dentry, FILE__SETATTR); - if (ia_valid & ATTR_SIZE) + if (selinux_policycap_openperm && (ia_valid & ATTR_SIZE)) av |= FILE__OPEN; return dentry_has_perm(cred, dentry, av); -- 1.7.10.4 -- This message was distributed to subscribers of the selinux mailing list. If you no longer wish to subscribe, send mail to majordomo@xxxxxxxxxxxxx with the words "unsubscribe selinux" without quotes as the message.
