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| author | Stephen Smalley <sds@tycho.nsa.gov> | 2019-09-04 10:32:48 -0400 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2019-09-04 18:41:12 -0400 |
| commit | 169ce0c081cd85f78388bb6c1638c1ad7b81bde7 (patch) | |
| tree | 7683ec34dd5af93084fe9ecf1effaf0ab73f67bd /security | |
| parent | 116f21bb967fcef1fa360fe591a2947481788020 (diff) | |
| download | lwn-169ce0c081cd85f78388bb6c1638c1ad7b81bde7.tar.gz lwn-169ce0c081cd85f78388bb6c1638c1ad7b81bde7.zip | |
selinux: fix residual uses of current_security() for the SELinux blob
We need to use selinux_cred() to fetch the SELinux cred blob instead
of directly using current->security or current_security(). There
were a couple of lingering uses of current_security() in the SELinux code
that were apparently missed during the earlier conversions. IIUC, this
would only manifest as a bug if multiple security modules including
SELinux are enabled and SELinux is not first in the lsm order. After
this change, there appear to be no other users of current_security()
in-tree; perhaps we should remove it altogether.
Fixes: bbd3662a8348 ("Infrastructure management of the cred security blob")
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/selinux/hooks.c | 2 | ||||
| -rw-r--r-- | security/selinux/include/objsec.h | 20 |
2 files changed, 11 insertions, 11 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index d55571c585ff..f1b763eceef9 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3435,7 +3435,7 @@ static int selinux_inode_copy_up_xattr(const char *name) static int selinux_kernfs_init_security(struct kernfs_node *kn_dir, struct kernfs_node *kn) { - const struct task_security_struct *tsec = current_security(); + const struct task_security_struct *tsec = selinux_cred(current_cred()); u32 parent_sid, newsid, clen; int rc; char *context; diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h index 231262d8eac9..d2e00c7595dd 100644 --- a/security/selinux/include/objsec.h +++ b/security/selinux/include/objsec.h @@ -40,16 +40,6 @@ struct task_security_struct { u32 sockcreate_sid; /* fscreate SID */ }; -/* - * get the subjective security ID of the current task - */ -static inline u32 current_sid(void) -{ - const struct task_security_struct *tsec = current_security(); - - return tsec->sid; -} - enum label_initialized { LABEL_INVALID, /* invalid or not initialized */ LABEL_INITIALIZED, /* initialized */ @@ -188,4 +178,14 @@ static inline struct ipc_security_struct *selinux_ipc( return ipc->security + selinux_blob_sizes.lbs_ipc; } +/* + * get the subjective security ID of the current task + */ +static inline u32 current_sid(void) +{ + const struct task_security_struct *tsec = selinux_cred(current_cred()); + + return tsec->sid; +} + #endif /* _SELINUX_OBJSEC_H_ */ |