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| author | Eric Paris <eparis@redhat.com> | 2009-11-03 16:35:32 +1100 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-11-10 09:33:46 +1100 |
| commit | dd8dbf2e6880e30c00b18600c962d0cb5a03c555 (patch) | |
| tree | 24835aaf40cec5ceb2aeecccde9240ee173f70f1 /security | |
| parent | 6e65f92ff0d6f18580737321718d09035085a3fb (diff) | |
| download | lwn-dd8dbf2e6880e30c00b18600c962d0cb5a03c555.tar.gz lwn-dd8dbf2e6880e30c00b18600c962d0cb5a03c555.zip | |
security: report the module name to security_module_request
For SELinux to do better filtering in userspace we send the name of the
module along with the AVC denial when a program is denied module_request.
Example output:
type=SYSCALL msg=audit(11/03/2009 10:59:43.510:9) : arch=x86_64 syscall=write success=yes exit=2 a0=3 a1=7fc28c0d56c0 a2=2 a3=7fffca0d7440 items=0 ppid=1727 pid=1729 auid=unset uid=root gid=root euid=root suid=root fsuid=root egid=root sgid=root fsgid=root tty=(none) ses=unset comm=rpc.nfsd exe=/usr/sbin/rpc.nfsd subj=system_u:system_r:nfsd_t:s0 key=(null)
type=AVC msg=audit(11/03/2009 10:59:43.510:9) : avc: denied { module_request } for pid=1729 comm=rpc.nfsd kmod="net-pf-10" scontext=system_u:system_r:nfsd_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=system
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/capability.c | 2 | ||||
| -rw-r--r-- | security/lsm_audit.c | 4 | ||||
| -rw-r--r-- | security/security.c | 4 | ||||
| -rw-r--r-- | security/selinux/hooks.c | 13 |
4 files changed, 18 insertions, 5 deletions
diff --git a/security/capability.c b/security/capability.c index 4f3ab476937f..5c700e1a4fd3 100644 --- a/security/capability.c +++ b/security/capability.c @@ -421,7 +421,7 @@ static int cap_kernel_create_files_as(struct cred *new, struct inode *inode) return 0; } -static int cap_kernel_module_request(void) +static int cap_kernel_module_request(char *kmod_name) { return 0; } diff --git a/security/lsm_audit.c b/security/lsm_audit.c index 3bb90b6f1dd3..51bd0fd9c9f0 100644 --- a/security/lsm_audit.c +++ b/security/lsm_audit.c @@ -354,6 +354,10 @@ static void dump_common_audit_data(struct audit_buffer *ab, } break; #endif + case LSM_AUDIT_DATA_KMOD: + audit_log_format(ab, " kmod="); + audit_log_untrustedstring(ab, a->u.kmod_name); + break; } /* switch (a->type) */ } diff --git a/security/security.c b/security/security.c index aad71b2ca195..24e060be9fa5 100644 --- a/security/security.c +++ b/security/security.c @@ -764,9 +764,9 @@ int security_kernel_create_files_as(struct cred *new, struct inode *inode) return security_ops->kernel_create_files_as(new, inode); } -int security_kernel_module_request(void) +int security_kernel_module_request(char *kmod_name) { - return security_ops->kernel_module_request(); + return security_ops->kernel_module_request(kmod_name); } int security_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index a29d6612a328..c96d63ec4753 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -3337,9 +3337,18 @@ static int selinux_kernel_create_files_as(struct cred *new, struct inode *inode) return 0; } -static int selinux_kernel_module_request(void) +static int selinux_kernel_module_request(char *kmod_name) { - return task_has_system(current, SYSTEM__MODULE_REQUEST); + u32 sid; + struct common_audit_data ad; + + sid = task_sid(current); + + COMMON_AUDIT_DATA_INIT(&ad, KMOD); + ad.u.kmod_name = kmod_name; + + return avc_has_perm(sid, SECINITSID_KERNEL, SECCLASS_SYSTEM, + SYSTEM__MODULE_REQUEST, &ad); } static int selinux_task_setpgid(struct task_struct *p, pid_t pgid) |