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selinux: log errors when loading new policy

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Adds error logging to the code paths which can fail when loading a new
policy in sel_write_load().  If the policy fails to be loaded from
userspace then a warning message is printed, whereas if a failure occurs
after loading policy from userspace an error message will be printed
with details on where policy loading failed (recreating one of /classes/,
/policy_capabilities/, /booleans/ in the SELinux fs).

Also, if sel_make_bools() fails to obtain an SID for an entry in
/booleans/* an error will be printed indicating the path of the
boolean.

Signed-off-by: Gary Tierney <gary.tierney@gmx.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Gary Tierney 2017-01-09 10:07:31 -05:00 committed by Paul Moore
parent b21507e272
commit 4262fb51c9
1 changed files with 16 additions and 5 deletions
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21
security/selinux/selinuxfs.c
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@ -508,20 +508,28 @@ static ssize_t sel_write_load(struct file *file, const char __user *buf,
goto out;
length = security_load_policy(data, count);
if (length)
if (length) {
pr_warn_ratelimited("SELinux: failed to load policy\n");
goto out;
}
length = sel_make_bools();
if (length)
if (length) {
pr_err("SELinux: failed to load policy booleans\n");
goto out1;
}
length = sel_make_classes();
if (length)
if (length) {
pr_err("SELinux: failed to load policy classes\n");
goto out1;
}
length = sel_make_policycap();
if (length)
if (length) {
pr_err("SELinux: failed to load policy capabilities\n");
goto out1;
}
length = count;
@ -1302,9 +1310,12 @@ static int sel_make_bools(void)
isec = (struct inode_security_struct *)inode->i_security;
ret = security_genfs_sid("selinuxfs", page, SECCLASS_FILE, &sid);
if (ret)
if (ret) {
pr_err("SELinux: failed to lookup sid for %s\n", page);
goto out;
}
isec->sid = sid;
isec->initialized = LABEL_INITIALIZED;
inode->i_fop = &sel_bool_ops;