From: David Howells <[email protected]>
Use find_vma() in the NOMMU version of access_process_vm() rather than
reimplementing it.
Signed-Off-By: David Howells <[email protected]>
---
mm/nommu.c | 11 +++--------
1 files changed, 3 insertions(+), 8 deletions(-)
diff --git a/mm/nommu.c b/mm/nommu.c
index 663ec1c..51e17b9 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1039,6 +1039,7 @@ unsigned long do_mremap(unsigned long ad
/*
* Look up the first VMA which satisfies addr < vm_end, NULL if none
+ * - should be called with mm->mmap_sem at least readlocked
*/
struct vm_area_struct *find_vma(struct mm_struct *mm, unsigned long addr)
{
@@ -1213,7 +1214,6 @@ struct page *filemap_nopage(struct vm_ar
*/
int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int len, int write)
{
- struct vm_list_struct *vml;
struct vm_area_struct *vma;
struct mm_struct *mm;
@@ -1227,13 +1227,8 @@ int access_process_vm(struct task_struct
down_read(&mm->mmap_sem);
/* the access must start within one of the target process's mappings */
- for (vml = mm->context.vmlist; vml; vml = vml->next)
- if (addr >= vml->vma->vm_start && addr < vml->vma->vm_end)
- break;
-
- if (vml) {
- vma = vml->vma;
-
+ vma = find_vma(mm, addr);
+ if (vma) {
/* don't overrun this mapping */
if (addr + len >= vma->vm_end)
len = vma->vm_end - addr;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
