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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-03 08:38:48 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-03 08:38:48 +0400
commit88265322c14cce39f7afbc416726ef4fac413298 (patch)
treee4956f905ef617971f87788d8f8a09dbb66b70a3 /kernel
parent65b99c74fdd325d1ffa2e5663295888704712604 (diff)
parentbf5308344527d015ac9a6d2bda4ad4d40fd7d943 (diff)
downloadlinux-88265322c14cce39f7afbc416726ef4fac413298.tar.xz
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
Pull security subsystem updates from James Morris: "Highlights: - Integrity: add local fs integrity verification to detect offline attacks - Integrity: add digital signature verification - Simple stacking of Yama with other LSMs (per LSS discussions) - IBM vTPM support on ppc64 - Add new driver for Infineon I2C TIS TPM - Smack: add rule revocation for subject labels" Fixed conflicts with the user namespace support in kernel/auditsc.c and security/integrity/ima/ima_policy.c. * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (39 commits) Documentation: Update git repository URL for Smack userland tools ima: change flags container data type Smack: setprocattr memory leak fix Smack: implement revoking all rules for a subject label Smack: remove task_wait() hook. ima: audit log hashes ima: generic IMA action flag handling ima: rename ima_must_appraise_or_measure audit: export audit_log_task_info tpm: fix tpm_acpi sparse warning on different address spaces samples/seccomp: fix 31 bit build on s390 ima: digital signature verification support ima: add support for different security.ima data types ima: add ima_inode_setxattr/removexattr function and calls ima: add inode_post_setattr call ima: replace iint spinblock with rwlock/read_lock ima: allocating iint improvements ima: add appraise action keywords and default rules ima: integrity appraisal extension vfs: move ima_file_free before releasing the file ...
Diffstat (limited to 'kernel')
-rw-r--r--kernel/auditsc.c85
-rw-r--r--kernel/ptrace.c3
2 files changed, 42 insertions, 46 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ff4798fcb488..29e090cc0e46 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1146,13 +1146,44 @@ error_path:
EXPORT_SYMBOL(audit_log_task_context);
-static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
+void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk)
{
+ const struct cred *cred;
char name[sizeof(tsk->comm)];
struct mm_struct *mm = tsk->mm;
struct vm_area_struct *vma;
+ char *tty;
+
+ if (!ab)
+ return;
/* tsk == current */
+ cred = current_cred();
+
+ spin_lock_irq(&tsk->sighand->siglock);
+ if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
+ tty = tsk->signal->tty->name;
+ else
+ tty = "(none)";
+ spin_unlock_irq(&tsk->sighand->siglock);
+
+
+ audit_log_format(ab,
+ " ppid=%ld pid=%d auid=%u uid=%u gid=%u"
+ " euid=%u suid=%u fsuid=%u"
+ " egid=%u sgid=%u fsgid=%u ses=%u tty=%s",
+ sys_getppid(),
+ tsk->pid,
+ from_kuid(&init_user_ns, tsk->loginuid),
+ from_kuid(&init_user_ns, cred->uid),
+ from_kgid(&init_user_ns, cred->gid),
+ from_kuid(&init_user_ns, cred->euid),
+ from_kuid(&init_user_ns, cred->suid),
+ from_kuid(&init_user_ns, cred->fsuid),
+ from_kgid(&init_user_ns, cred->egid),
+ from_kgid(&init_user_ns, cred->sgid),
+ from_kgid(&init_user_ns, cred->fsgid),
+ tsk->sessionid, tty);
get_task_comm(name, tsk);
audit_log_format(ab, " comm=");
@@ -1175,6 +1206,8 @@ static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk
audit_log_task_context(ab);
}
+EXPORT_SYMBOL(audit_log_task_info);
+
static int audit_log_pid_context(struct audit_context *context, pid_t pid,
kuid_t auid, kuid_t uid, unsigned int sessionid,
u32 sid, char *comm)
@@ -1580,26 +1613,12 @@ static void audit_log_name(struct audit_context *context, struct audit_names *n,
static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
{
- const struct cred *cred;
int i, call_panic = 0;
struct audit_buffer *ab;
struct audit_aux_data *aux;
- const char *tty;
struct audit_names *n;
/* tsk == current */
- context->pid = tsk->pid;
- if (!context->ppid)
- context->ppid = sys_getppid();
- cred = current_cred();
- context->uid = cred->uid;
- context->gid = cred->gid;
- context->euid = cred->euid;
- context->suid = cred->suid;
- context->fsuid = cred->fsuid;
- context->egid = cred->egid;
- context->sgid = cred->sgid;
- context->fsgid = cred->fsgid;
context->personality = tsk->personality;
ab = audit_log_start(context, GFP_KERNEL, AUDIT_SYSCALL);
@@ -1614,37 +1633,13 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
(context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
context->return_code);
- spin_lock_irq(&tsk->sighand->siglock);
- if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
- tty = tsk->signal->tty->name;
- else
- tty = "(none)";
- spin_unlock_irq(&tsk->sighand->siglock);
-
audit_log_format(ab,
- " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
- " ppid=%d pid=%d auid=%u uid=%u gid=%u"
- " euid=%u suid=%u fsuid=%u"
- " egid=%u sgid=%u fsgid=%u tty=%s ses=%u",
- context->argv[0],
- context->argv[1],
- context->argv[2],
- context->argv[3],
- context->name_count,
- context->ppid,
- context->pid,
- from_kuid(&init_user_ns, tsk->loginuid),
- from_kuid(&init_user_ns, context->uid),
- from_kgid(&init_user_ns, context->gid),
- from_kuid(&init_user_ns, context->euid),
- from_kuid(&init_user_ns, context->suid),
- from_kuid(&init_user_ns, context->fsuid),
- from_kgid(&init_user_ns, context->egid),
- from_kgid(&init_user_ns, context->sgid),
- from_kgid(&init_user_ns, context->fsgid),
- tty,
- tsk->sessionid);
-
+ " a0=%lx a1=%lx a2=%lx a3=%lx items=%d",
+ context->argv[0],
+ context->argv[1],
+ context->argv[2],
+ context->argv[3],
+ context->name_count);
audit_log_task_info(ab, tsk);
audit_log_key(ab, context->filterkey);
diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index a232bb59d93f..1f5e55dda955 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -180,7 +180,8 @@ static int ptrace_has_cap(struct user_namespace *ns, unsigned int mode)
return has_ns_capability(current, ns, CAP_SYS_PTRACE);
}
-int __ptrace_may_access(struct task_struct *task, unsigned int mode)
+/* Returns 0 on success, -errno on denial. */
+static int __ptrace_may_access(struct task_struct *task, unsigned int mode)
{
const struct cred *cred = current_cred(), *tcred;