diff options
| author | Andreas Gruenbacher <agruenba@redhat.com> | 2015-12-24 11:09:40 -0500 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2022-04-19 00:51:59 +0300 |
| commit | 0619b8efce135b87330419df704b17b221441158 (patch) | |
| tree | e2c15cd276289c9b617360c6d17ad0af3fd957c3 /security/selinux/hooks.c | |
| parent | db0ce4ad3621c4e5b573f8c748a6e0929b5ca2d0 (diff) | |
security: Add hook to invalidate inode security labels
Add a hook to invalidate an inode's security label when the cached
information becomes invalid.
Add the new hook in selinux: set a flag when a security label becomes
invalid.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: James Morris <james.l.morris@oracle.com>
Acked-by: Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Diffstat (limited to 'security/selinux/hooks.c')
| -rw-r--r-- | security/selinux/hooks.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 884da99fc3dc..aeb8fb840025 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -829,7 +829,7 @@ static int selinux_set_mnt_opts(struct super_block *sb, goto out; root_isec->sid = rootcontext_sid; - root_isec->initialized = 1; + root_isec->initialized = LABEL_INITIALIZED; } if (defcontext_sid) { @@ -1319,11 +1319,11 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent unsigned len = 0; int rc = 0; - if (isec->initialized) + if (isec->initialized == LABEL_INITIALIZED) goto out; mutex_lock(&isec->lock); - if (isec->initialized) + if (isec->initialized == LABEL_INITIALIZED) goto out_unlock; sbsec = inode->i_sb->s_security; @@ -1495,7 +1495,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent break; } - isec->initialized = 1; + isec->initialized = LABEL_INITIALIZED; out_unlock: mutex_unlock(&isec->lock); @@ -2812,7 +2812,7 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir, struct inode_security_struct *isec = inode->i_security; isec->sclass = inode_mode_to_security_class(inode->i_mode); isec->sid = newsid; - isec->initialized = 1; + isec->initialized = LABEL_INITIALIZED; } if (!ss_initialized || !(sbsec->flags & SBLABEL_MNT)) @@ -3114,7 +3114,7 @@ static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name, isec->sclass = inode_mode_to_security_class(inode->i_mode); isec->sid = newsid; - isec->initialized = 1; + isec->initialized = LABEL_INITIALIZED; return; } @@ -3208,7 +3208,7 @@ static int selinux_inode_setsecurity(struct inode *inode, const char *name, isec->sclass = inode_mode_to_security_class(inode->i_mode); isec->sid = newsid; - isec->initialized = 1; + isec->initialized = LABEL_INITIALIZED; return 0; } @@ -3818,7 +3818,7 @@ static void selinux_task_to_inode(struct task_struct *p, u32 sid = task_sid(p); isec->sid = sid; - isec->initialized = 1; + isec->initialized = LABEL_INITIALIZED; } /* Returns error only if unable to parse addresses */ @@ -4151,7 +4151,7 @@ static int selinux_socket_post_create(struct socket *sock, int family, return err; } - isec->initialized = 1; + isec->initialized = LABEL_INITIALIZED; if (sock->sk) { sksec = sock->sk->sk_security; @@ -4350,7 +4350,7 @@ static int selinux_socket_accept(struct socket *sock, struct socket *newsock) isec = inode_security(SOCK_INODE(sock)); newisec->sclass = isec->sclass; newisec->sid = isec->sid; - newisec->initialized = 1; + newisec->initialized = LABEL_INITIALIZED; return 0; } @@ -5863,6 +5863,15 @@ static void selinux_release_secctx(char *secdata, u32 seclen) kfree(secdata); } +static void selinux_inode_invalidate_secctx(struct inode *inode) +{ + struct inode_security_struct *isec = inode->i_security; + + mutex_lock(&isec->lock); + isec->initialized = LABEL_INVALID; + mutex_unlock(&isec->lock); +} + /* * called with inode->i_mutex locked */ @@ -6228,6 +6237,7 @@ static struct security_hook_list selinux_hooks[] = { LSM_HOOK_INIT(secid_to_secctx, selinux_secid_to_secctx), LSM_HOOK_INIT(secctx_to_secid, selinux_secctx_to_secid), LSM_HOOK_INIT(release_secctx, selinux_release_secctx), + LSM_HOOK_INIT(inode_invalidate_secctx, selinux_inode_invalidate_secctx), LSM_HOOK_INIT(inode_notifysecctx, selinux_inode_notifysecctx), LSM_HOOK_INIT(inode_setsecctx, selinux_inode_setsecctx), LSM_HOOK_INIT(inode_getsecctx, selinux_inode_getsecctx), |