diff options
Diffstat (limited to 'sys-kernel/grsec-sources/files/2.4.28-grsec-2.1.0-pax-mmap-pgtables.patch')
| -rw-r--r-- | sys-kernel/grsec-sources/files/2.4.28-grsec-2.1.0-pax-mmap-pgtables.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/sys-kernel/grsec-sources/files/2.4.28-grsec-2.1.0-pax-mmap-pgtables.patch b/sys-kernel/grsec-sources/files/2.4.28-grsec-2.1.0-pax-mmap-pgtables.patch new file mode 100644 index 000000000000..baf4907aba34 --- /dev/null +++ b/sys-kernel/grsec-sources/files/2.4.28-grsec-2.1.0-pax-mmap-pgtables.patch @@ -0,0 +1,44 @@ +--- mm/mmap.c.orig 2005-03-05 13:29:06.000000000 -0500 ++++ mm/mmap.c 2005-03-05 13:33:51.000000000 -0500 +@@ -1014,7 +1014,7 @@ + * we just free'd - but there's no telling how much before. + */ + static void free_pgtables(struct mm_struct * mm, struct vm_area_struct *prev, +- unsigned long start, unsigned long end) ++ struct vm_area_struct *mpnt, unsigned long start, unsigned long end) + { + unsigned long first = start & PGDIR_MASK; + unsigned long last = end + PGDIR_SIZE - 1; +@@ -1046,6 +1046,14 @@ + break; + } + no_mmaps: ++ while (mpnt && first < last) { ++ if ((mpnt->vm_end > first) &&(last > mpnt->vm_start)) { ++ first = mpnt->vm_end + PGDIR_SIZE - 1; ++ last = mpnt->vm_start; ++ } ++ mpnt = mpnt->vm_next; ++ } ++ + if (last < first) + return; + /* +@@ -1106,7 +1114,7 @@ + extra = unmap_vma(mm, addr, len, mpnt, extra); + } + +- free_pgtables(mm, prev, addr, addr+len); ++ free_pgtables(mm, prev, NULL, addr, addr+len); + + return extra; + } +@@ -1130,7 +1138,7 @@ + find_vma_prev(mm, mpnt->vm_start, &prev); + extra_m = unmap_vma(mm, addr_m, len, mpnt, extra_m); + +- free_pgtables(mm, prev, start, end); ++ free_pgtables(mm, prev, free_m, start, end); + } + + return extra_m; |