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audit: Simplify and correct audit_log_capset 

- Always report the current process as capset now always only works on
  the current process.  This prevents reporting 0 or a random pid in
  a random pid namespace.

- Don't bother to pass the pid as is available.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
(cherry picked from commit bcc85f0af31af123e32858069eb2ad8f39f90e67)
(cherry picked from commit f911cac4556a7a23e0b3ea850233d13b32328692)

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[eparis: fix build error when audit disabled]
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric W. Biederman 2013-03-19 00:02:25 -07:00 committed by Eric Paris
parent fc582aef7d
commit ca24a23ebc
3 changed files with 8 additions and 10 deletions
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10
include/linux/audit.h
View File

@ -220,7 +220,7 @@ extern void __audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat);
extern int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
const struct cred *new,
const struct cred *old);
extern void __audit_log_capset(pid_t pid, const struct cred *new, const struct cred *old);
extern void __audit_log_capset(const struct cred *new, const struct cred *old);
extern void __audit_mmap_fd(int fd, int flags);
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
@ -285,11 +285,11 @@ static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
return 0;
}
static inline void audit_log_capset(pid_t pid, const struct cred *new,
static inline void audit_log_capset(const struct cred *new,
const struct cred *old)
{
if (unlikely(!audit_dummy_context()))
__audit_log_capset(pid, new, old);
__audit_log_capset(new, old);
}
static inline void audit_mmap_fd(int fd, int flags)
@ -397,8 +397,8 @@ static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
{
return 0;
}
static inline void audit_log_capset(pid_t pid, const struct cred *new,
const struct cred *old)
static inline void audit_log_capset(const struct cred *new,
const struct cred *old)
{ }
static inline void audit_mmap_fd(int fd, int flags)
{ }

6
kernel/auditsc.c
View File

@ -2321,18 +2321,16 @@ int __audit_log_bprm_fcaps(struct linux_binprm *bprm,
/**
* __audit_log_capset - store information about the arguments to the capset syscall
* @pid: target pid of the capset call
* @new: the new credentials
* @old: the old (current) credentials
*
* Record the aguments userspace sent to sys_capset for later printing by the
* audit system if applicable
*/
void __audit_log_capset(pid_t pid,
const struct cred *new, const struct cred *old)
void __audit_log_capset(const struct cred *new, const struct cred *old)
{
struct audit_context *context = current->audit_context;
context->capset.pid = pid;
context->capset.pid = task_pid_nr(current);
context->capset.cap.effective = new->cap_effective;
context->capset.cap.inheritable = new->cap_effective;
context->capset.cap.permitted = new->cap_permitted;

2
kernel/capability.c
View File

@ -277,7 +277,7 @@ SYSCALL_DEFINE2(capset, cap_user_header_t, header, const cap_user_data_t, data)
if (ret < 0)
goto error;
audit_log_capset(pid, new, current_cred());
audit_log_capset(new, current_cred());
return commit_creds(new);