A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

[PATCH] Don't map the same page too much

Browse source 
Refuse to install a page into a mapping if the mapping count is already
ridiculously large.

You probably cannot trigger this on 32-bit architectures, but on a
64-bit setup we should protect against it.

Signed-off-by: Hugh Dickins <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Hugh Dickins 2005-10-11 19:16:26 +01:00 • committed by Linus Torvalds
commit f5154a98a1
1 changed files with 3 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
mm/fremap.c
View file

@ -89,6 +89,9 @@ int install_page(struct mm_struct *mm, struct vm_area_struct *vma,
size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
if (!page->mapping || page->index >= size)
goto err_unlock;
err = -ENOMEM;
if (page_mapcount(page) > INT_MAX/2)
goto err_unlock;
zap_pte(mm, vma, addr, pte);