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-rw-r--r--include/linux/audit.h9
-rw-r--r--kernel/auditsc.c16
-rw-r--r--mm/mmap.c2
-rw-r--r--mm/nommu.c2
4 files changed, 29 insertions, 0 deletions
diff --git a/include/linux/audit.h b/include/linux/audit.h
index e24afabc548..8b5c0620abf 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -102,6 +102,7 @@
#define AUDIT_EOE 1320 /* End of multi-record event */
#define AUDIT_BPRM_FCAPS 1321 /* Information about fcaps increasing perms */
#define AUDIT_CAPSET 1322 /* Record showing argument to sys_capset */
+#define AUDIT_MMAP 1323 /* Record showing descriptor and flags in mmap */
#define AUDIT_AVC 1400 /* SE Linux avc denial or grant */
#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
@@ -478,6 +479,7 @@ 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_mmap_fd(int fd, int flags);
static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
{
@@ -531,6 +533,12 @@ static inline void audit_log_capset(pid_t pid, const struct cred *new,
__audit_log_capset(pid, new, old);
}
+static inline void audit_mmap_fd(int fd, int flags)
+{
+ if (unlikely(!audit_dummy_context()))
+ __audit_mmap_fd(fd, flags);
+}
+
extern int audit_n_rules;
extern int audit_signals;
#else
@@ -564,6 +572,7 @@ extern int audit_signals;
#define audit_mq_getsetattr(d,s) ((void)0)
#define audit_log_bprm_fcaps(b, ncr, ocr) ({ 0; })
#define audit_log_capset(pid, ncr, ocr) ((void)0)
+#define audit_mmap_fd(fd, flags) ((void)0)
#define audit_ptrace(t) ((void)0)
#define audit_n_rules 0
#define audit_signals 0
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 1b31c130d03..f49a0318c2e 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -241,6 +241,10 @@ struct audit_context {
pid_t pid;
struct audit_cap_data cap;
} capset;
+ struct {
+ int fd;
+ int flags;
+ } mmap;
};
int fds[2];
@@ -1305,6 +1309,10 @@ static void show_special(struct audit_context *context, int *call_panic)
audit_log_cap(ab, "cap_pp", &context->capset.cap.permitted);
audit_log_cap(ab, "cap_pe", &context->capset.cap.effective);
break; }
+ case AUDIT_MMAP: {
+ audit_log_format(ab, "fd=%d flags=0x%x", context->mmap.fd,
+ context->mmap.flags);
+ break; }
}
audit_log_end(ab);
}
@@ -2476,6 +2484,14 @@ void __audit_log_capset(pid_t pid,
context->type = AUDIT_CAPSET;
}
+void __audit_mmap_fd(int fd, int flags)
+{
+ struct audit_context *context = current->audit_context;
+ context->mmap.fd = fd;
+ context->mmap.flags = flags;
+ context->type = AUDIT_MMAP;
+}
+
/**
* audit_core_dumps - record information about processes that end abnormally
* @signr: signal value
diff --git a/mm/mmap.c b/mm/mmap.c
index 00161a48a45..b179abb1474 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -28,6 +28,7 @@
#include <linux/rmap.h>
#include <linux/mmu_notifier.h>
#include <linux/perf_event.h>
+#include <linux/audit.h>
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
@@ -1108,6 +1109,7 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
unsigned long retval = -EBADF;
if (!(flags & MAP_ANONYMOUS)) {
+ audit_mmap_fd(fd, flags);
if (unlikely(flags & MAP_HUGETLB))
return -EINVAL;
file = fget(fd);
diff --git a/mm/nommu.c b/mm/nommu.c
index 30b5c20eec1..3613517c759 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -29,6 +29,7 @@
#include <linux/personality.h>
#include <linux/security.h>
#include <linux/syscalls.h>
+#include <linux/audit.h>
#include <asm/uaccess.h>
#include <asm/tlb.h>
@@ -1458,6 +1459,7 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
struct file *file = NULL;
unsigned long retval = -EBADF;
+ audit_mmap_fd(fd, flags);
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file)