summaryrefslogtreecommitdiffstats
path: root/fs/exec.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c41
1 files changed, 37 insertions, 4 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 99d33a1371e9..c62efcb959c7 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -164,7 +164,26 @@ out:
#ifdef CONFIG_MMU
-static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
+void acct_arg_size(struct linux_binprm *bprm, unsigned long pages)
+{
+ struct mm_struct *mm = current->mm;
+ long diff = (long)(pages - bprm->vma_pages);
+
+ if (!mm || !diff)
+ return;
+
+ bprm->vma_pages = pages;
+
+#ifdef SPLIT_RSS_COUNTING
+ add_mm_counter(mm, MM_ANONPAGES, diff);
+#else
+ spin_lock(&mm->page_table_lock);
+ add_mm_counter(mm, MM_ANONPAGES, diff);
+ spin_unlock(&mm->page_table_lock);
+#endif
+}
+
+struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
int write)
{
struct page *page;
@@ -186,6 +205,8 @@ static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
unsigned long size = bprm->vma->vm_end - bprm->vma->vm_start;
struct rlimit *rlim;
+ acct_arg_size(bprm, size / PAGE_SIZE);
+
/*
* We've historically supported up to 32 pages (ARG_MAX)
* of argument strings even with small stacks
@@ -254,6 +275,11 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
vma->vm_flags = VM_STACK_FLAGS | VM_STACK_INCOMPLETE_SETUP;
vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
INIT_LIST_HEAD(&vma->anon_vma_chain);
+
+ err = security_file_mmap(NULL, 0, 0, 0, vma->vm_start, 1);
+ if (err)
+ goto err;
+
err = insert_vm_struct(mm, vma);
if (err)
goto err;
@@ -276,7 +302,11 @@ static bool valid_arg_len(struct linux_binprm *bprm, long len)
#else
-static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
+void acct_arg_size(struct linux_binprm *bprm, unsigned long pages)
+{
+}
+
+struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
int write)
{
struct page *page;
@@ -1003,6 +1033,7 @@ int flush_old_exec(struct linux_binprm * bprm)
/*
* Release all of the old mmap stuff
*/
+ acct_arg_size(bprm, 0);
retval = exec_mmap(bprm->mm);
if (retval)
goto out;
@@ -1426,8 +1457,10 @@ int do_execve(const char * filename,
return retval;
out:
- if (bprm->mm)
- mmput (bprm->mm);
+ if (bprm->mm) {
+ acct_arg_size(bprm, 0);
+ mmput(bprm->mm);
+ }
out_file:
if (bprm->file) {