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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-23 14:25:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-23 14:25:45 -0700
commite94f8ccde4710f9a3e51dd3bc6134c96e33f29b3 (patch)
tree15dd4e776cb92e486c7a0eb1168347de5a87402c /security/smack
parent9f7582d15f82e86b2041ab22327b7d769e061c1f (diff)
parente5bfad3d7acc5702f32aafeb388362994f4d7bd0 (diff)
downloadlinux-e94f8ccde4710f9a3e51dd3bc6134c96e33f29b3.tar.gz
Merge tag 'smack-for-5.4-rc1' of git://github.com/cschaufler/smack-next
Pull smack updates from Casey Schaufler: "Four patches for v5.4. Nothing is major. All but one are in response to mechanically detected potential issues. The remaining patch cleans up kernel-doc notations" * tag 'smack-for-5.4-rc1' of git://github.com/cschaufler/smack-next: smack: use GFP_NOFS while holding inode_smack::smk_lock security: smack: Fix possible null-pointer dereferences in smack_socket_sock_rcv_skb() smack: fix some kernel-doc notations Smack: Don't ignore other bprm->unsafe flags if LSM_UNSAFE_PTRACE is set
Diffstat (limited to 'security/smack')
-rw-r--r--security/smack/smack_access.c6
-rw-r--r--security/smack/smack_lsm.c40
2 files changed, 23 insertions, 23 deletions
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index f1c93a7be9ec..38ac3da4e791 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -465,7 +465,7 @@ char *smk_parse_smack(const char *string, int len)
if (i == 0 || i >= SMK_LONGLABEL)
return ERR_PTR(-EINVAL);
- smack = kzalloc(i + 1, GFP_KERNEL);
+ smack = kzalloc(i + 1, GFP_NOFS);
if (smack == NULL)
return ERR_PTR(-ENOMEM);
@@ -500,7 +500,7 @@ int smk_netlbl_mls(int level, char *catset, struct netlbl_lsm_secattr *sap,
if ((m & *cp) == 0)
continue;
rc = netlbl_catmap_setbit(&sap->attr.mls.cat,
- cat, GFP_KERNEL);
+ cat, GFP_NOFS);
if (rc < 0) {
netlbl_catmap_free(sap->attr.mls.cat);
return rc;
@@ -536,7 +536,7 @@ struct smack_known *smk_import_entry(const char *string, int len)
if (skp != NULL)
goto freeout;
- skp = kzalloc(sizeof(*skp), GFP_KERNEL);
+ skp = kzalloc(sizeof(*skp), GFP_NOFS);
if (skp == NULL) {
skp = ERR_PTR(-ENOMEM);
goto freeout;
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 4c5e5a438f8b..abeb09c30633 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -288,7 +288,7 @@ static struct smack_known *smk_fetch(const char *name, struct inode *ip,
if (!(ip->i_opflags & IOP_XATTR))
return ERR_PTR(-EOPNOTSUPP);
- buffer = kzalloc(SMK_LONGLABEL, GFP_KERNEL);
+ buffer = kzalloc(SMK_LONGLABEL, GFP_NOFS);
if (buffer == NULL)
return ERR_PTR(-ENOMEM);
@@ -307,7 +307,7 @@ static struct smack_known *smk_fetch(const char *name, struct inode *ip,
/**
* init_inode_smack - initialize an inode security blob
- * @isp: the blob to initialize
+ * @inode: inode to extract the info from
* @skp: a pointer to the Smack label entry to use in the blob
*
*/
@@ -509,7 +509,7 @@ static int smack_ptrace_traceme(struct task_struct *ptp)
/**
* smack_syslog - Smack approval on syslog
- * @type: message type
+ * @typefrom_file: unused
*
* Returns 0 on success, error code otherwise.
*/
@@ -765,7 +765,7 @@ static int smack_sb_eat_lsm_opts(char *options, void **mnt_opts)
/**
* smack_set_mnt_opts - set Smack specific mount options
* @sb: the file system superblock
- * @opts: Smack mount options
+ * @mnt_opts: Smack mount options
* @kern_flags: mount option from kernel space or user space
* @set_kern_flags: where to store converted mount opts
*
@@ -937,7 +937,8 @@ static int smack_bprm_set_creds(struct linux_binprm *bprm)
if (rc != 0)
return rc;
- } else if (bprm->unsafe)
+ }
+ if (bprm->unsafe & ~LSM_UNSAFE_PTRACE)
return -EPERM;
bsp->smk_task = isp->smk_task;
@@ -958,7 +959,7 @@ static int smack_bprm_set_creds(struct linux_binprm *bprm)
* smack_inode_alloc_security - allocate an inode blob
* @inode: the inode in need of a blob
*
- * Returns 0 if it gets a blob, -ENOMEM otherwise
+ * Returns 0
*/
static int smack_inode_alloc_security(struct inode *inode)
{
@@ -1164,7 +1165,7 @@ static int smack_inode_rename(struct inode *old_inode,
*
* This is the important Smack hook.
*
- * Returns 0 if access is permitted, -EACCES otherwise
+ * Returns 0 if access is permitted, an error code otherwise
*/
static int smack_inode_permission(struct inode *inode, int mask)
{
@@ -1222,8 +1223,7 @@ static int smack_inode_setattr(struct dentry *dentry, struct iattr *iattr)
/**
* smack_inode_getattr - Smack check for getting attributes
- * @mnt: vfsmount of the object
- * @dentry: the object
+ * @path: path to extract the info from
*
* Returns 0 if access is permitted, an error code otherwise
*/
@@ -1870,14 +1870,13 @@ static int smack_file_receive(struct file *file)
/**
* smack_file_open - Smack dentry open processing
* @file: the object
- * @cred: task credential
*
* Set the security blob in the file structure.
* Allow the open only if the task has read access. There are
* many read operations (e.g. fstat) that you can do with an
* fd even if you have the file open write-only.
*
- * Returns 0
+ * Returns 0 if current has access, error code otherwise
*/
static int smack_file_open(struct file *file)
{
@@ -1900,7 +1899,7 @@ static int smack_file_open(struct file *file)
/**
* smack_cred_alloc_blank - "allocate" blank task-level security credentials
- * @new: the new credentials
+ * @cred: the new credentials
* @gfp: the atomicity of any memory allocations
*
* Prepare a blank set of credentials for modification. This must allocate all
@@ -1983,7 +1982,7 @@ static void smack_cred_transfer(struct cred *new, const struct cred *old)
/**
* smack_cred_getsecid - get the secid corresponding to a creds structure
- * @c: the object creds
+ * @cred: the object creds
* @secid: where to put the result
*
* Sets the secid to contain a u32 version of the smack label.
@@ -2140,8 +2139,6 @@ static int smack_task_getioprio(struct task_struct *p)
/**
* smack_task_setscheduler - Smack check on setting scheduler
* @p: the task object
- * @policy: unused
- * @lp: unused
*
* Return 0 if read access is permitted
*/
@@ -2611,8 +2608,9 @@ static void smk_ipv6_port_label(struct socket *sock, struct sockaddr *address)
/**
* smk_ipv6_port_check - check Smack port access
- * @sock: socket
+ * @sk: socket
* @address: address
+ * @act: the action being taken
*
* Create or update the port list entry
*/
@@ -2782,7 +2780,7 @@ static int smack_socket_post_create(struct socket *sock, int family,
*
* Cross reference the peer labels for SO_PEERSEC
*
- * Returns 0 on success, and error code otherwise
+ * Returns 0
*/
static int smack_socket_socketpair(struct socket *socka,
struct socket *sockb)
@@ -3014,13 +3012,13 @@ static int smack_shm_shmctl(struct kern_ipc_perm *isp, int cmd)
*
* Returns 0 if current has the requested access, error code otherwise
*/
-static int smack_shm_shmat(struct kern_ipc_perm *ipc, char __user *shmaddr,
+static int smack_shm_shmat(struct kern_ipc_perm *isp, char __user *shmaddr,
int shmflg)
{
int may;
may = smack_flags_to_may(shmflg);
- return smk_curacc_shm(ipc, may);
+ return smk_curacc_shm(isp, may);
}
/**
@@ -3925,6 +3923,8 @@ access_check:
skp = smack_ipv6host_label(&sadd);
if (skp == NULL)
skp = smack_net_ambient;
+ if (skb == NULL)
+ break;
#ifdef CONFIG_AUDIT
smk_ad_init_net(&ad, __func__, LSM_AUDIT_DATA_NET, &net);
ad.a.u.net->family = family;
@@ -4762,7 +4762,7 @@ static __init void init_smack_known_list(void)
/**
* smack_init - initialize the smack system
*
- * Returns 0
+ * Returns 0 on success, -ENOMEM is there's no memory
*/
static __init int smack_init(void)
{