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audit mmap

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Normal syscall audit doesn't catch 5th argument of syscall.  It also
doesn't catch the contents of userland structures pointed to be
syscall argument, so for both old and new mmap(2) ABI it doesn't
record the descriptor we are mapping.  For old one it also misses
flags.

Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2010-10-30 02:54:44 -04:00
commit 120a795da0
4 changed files with 29 additions and 0 deletions
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2
mm/mmap.c
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@ -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);

2
mm/nommu.c
View file

@ -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)