diff options
Diffstat (limited to 'security')
| -rw-r--r-- | security/selinux/hooks.c | 35 | ||||
| -rw-r--r-- | security/selinux/include/av_perm_to_string.h | 2 | ||||
| -rw-r--r-- | security/selinux/include/av_permissions.h | 3 | ||||
| -rw-r--r-- | security/selinux/include/objsec.h | 1 |
4 files changed, 34 insertions, 7 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 13384fef0d6..0d8b27513bd 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1099,6 +1099,17 @@ static int may_create(struct inode *dir, FILESYSTEM__ASSOCIATE, &ad); } +/* Check whether a task can create a key. */ +static int may_create_key(u32 ksid, + struct task_struct *ctx) +{ + struct task_security_struct *tsec; + + tsec = ctx->security; + + return avc_has_perm(tsec->sid, ksid, SECCLASS_KEY, KEY__CREATE, NULL); +} + #define MAY_LINK 0 #define MAY_UNLINK 1 #define MAY_RMDIR 2 @@ -4150,6 +4161,8 @@ static int selinux_getprocattr(struct task_struct *p, sid = tsec->exec_sid; else if (!strcmp(name, "fscreate")) sid = tsec->create_sid; + else if (!strcmp(name, "keycreate")) + sid = tsec->keycreate_sid; else return -EINVAL; @@ -4182,6 +4195,8 @@ static int selinux_setprocattr(struct task_struct *p, error = task_has_perm(current, p, PROCESS__SETEXEC); else if (!strcmp(name, "fscreate")) error = task_has_perm(current, p, PROCESS__SETFSCREATE); + else if (!strcmp(name, "keycreate")) + error = task_has_perm(current, p, PROCESS__SETKEYCREATE); else if (!strcmp(name, "current")) error = task_has_perm(current, p, PROCESS__SETCURRENT); else @@ -4211,7 +4226,12 @@ static int selinux_setprocattr(struct task_struct *p, tsec->exec_sid = sid; else if (!strcmp(name, "fscreate")) tsec->create_sid = sid; - else if (!strcmp(name, "current")) { + else if (!strcmp(name, "keycreate")) { + error = may_create_key(sid, p); + if (error) + return error; + tsec->keycreate_sid = sid; + } else if (!strcmp(name, "current")) { struct av_decision avd; if (sid == 0) @@ -4275,7 +4295,10 @@ static int selinux_key_alloc(struct key *k, struct task_struct *tsk, return -ENOMEM; ksec->obj = k; - ksec->sid = tsec->sid; + if (tsec->keycreate_sid) + ksec->sid = tsec->keycreate_sid; + else + ksec->sid = tsec->sid; k->security = ksec; return 0; @@ -4514,10 +4537,10 @@ static __init int selinux_init(void) #ifdef CONFIG_KEYS /* Add security information to initial keyrings */ - security_key_alloc(&root_user_keyring, current, - KEY_ALLOC_NOT_IN_QUOTA); - security_key_alloc(&root_session_keyring, current, - KEY_ALLOC_NOT_IN_QUOTA); + selinux_key_alloc(&root_user_keyring, current, + KEY_ALLOC_NOT_IN_QUOTA); + selinux_key_alloc(&root_session_keyring, current, + KEY_ALLOC_NOT_IN_QUOTA); #endif return 0; diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h index bc020bde6c8..e777578ccd9 100644 --- a/security/selinux/include/av_perm_to_string.h +++ b/security/selinux/include/av_perm_to_string.h @@ -72,6 +72,7 @@ S_(SECCLASS_PROCESS, PROCESS__EXECMEM, "execmem") S_(SECCLASS_PROCESS, PROCESS__EXECSTACK, "execstack") S_(SECCLASS_PROCESS, PROCESS__EXECHEAP, "execheap") + S_(SECCLASS_PROCESS, PROCESS__SETKEYCREATE, "setkeycreate") S_(SECCLASS_MSGQ, MSGQ__ENQUEUE, "enqueue") S_(SECCLASS_MSG, MSG__SEND, "send") S_(SECCLASS_MSG, MSG__RECEIVE, "receive") @@ -248,3 +249,4 @@ S_(SECCLASS_KEY, KEY__SEARCH, "search") S_(SECCLASS_KEY, KEY__LINK, "link") S_(SECCLASS_KEY, KEY__SETATTR, "setattr") + S_(SECCLASS_KEY, KEY__CREATE, "create") diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h index 1205227a3a3..1e1678023b6 100644 --- a/security/selinux/include/av_permissions.h +++ b/security/selinux/include/av_permissions.h @@ -467,6 +467,7 @@ #define PROCESS__EXECMEM 0x02000000UL #define PROCESS__EXECSTACK 0x04000000UL #define PROCESS__EXECHEAP 0x08000000UL +#define PROCESS__SETKEYCREATE 0x10000000UL #define IPC__CREATE 0x00000001UL #define IPC__DESTROY 0x00000002UL @@ -966,4 +967,4 @@ #define KEY__SEARCH 0x00000008UL #define KEY__LINK 0x00000010UL #define KEY__SETATTR 0x00000020UL - +#define KEY__CREATE 0x00000040UL diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h index 8f5547ad185..191b3e4484c 100644 --- a/security/selinux/include/objsec.h +++ b/security/selinux/include/objsec.h @@ -32,6 +32,7 @@ struct task_security_struct { u32 sid; /* current SID */ u32 exec_sid; /* exec SID */ u32 create_sid; /* fscreate SID */ + u32 keycreate_sid; /* keycreate SID */ u32 ptrace_sid; /* SID of ptrace parent */ }; |