tree 929e03789ee2191bbebe45fbd9b6c50865c5f9ca parent e234f35c54a30d040313e40833dcf623d14629b4 author Hugh Dickins <[EMAIL PROTECTED]> Fri, 05 Aug 2005 03:07:09 -0700 committer Linus Torvalds <[EMAIL PROTECTED]> Fri, 05 Aug 2005 03:11:15 -0700
[PATCH] fix VmSize and VmData after mremap mremap's move_vma is applying __vm_stat_account to the old vma which may have already been freed: move it to just before the do_munmap. mremapping to and fro with CONFIG_DEBUG_SLAB=y showed /proc/<pid>/status VmSize and VmData wrapping just like in kernel bugzilla #4842, and fixed by this patch - worth including in 2.6.13, though not yet confirmed that it fixes that specific report from Frank van Maarseveen. Signed-off-by: Hugh Dickins <[EMAIL PROTECTED]> Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]> mm/mremap.c | 2 +- 1 files changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/mremap.c b/mm/mremap.c --- a/mm/mremap.c +++ b/mm/mremap.c @@ -229,6 +229,7 @@ static unsigned long move_vma(struct vm_ * since do_munmap() will decrement it by old_len == new_len */ mm->total_vm += new_len >> PAGE_SHIFT; + __vm_stat_account(mm, vma->vm_flags, vma->vm_file, new_len>>PAGE_SHIFT); if (do_munmap(mm, old_addr, old_len) < 0) { /* OOM: unable to split vma, just get accounts right */ @@ -243,7 +244,6 @@ static unsigned long move_vma(struct vm_ vma->vm_next->vm_flags |= VM_ACCOUNT; } - __vm_stat_account(mm, vma->vm_flags, vma->vm_file, new_len>>PAGE_SHIFT); if (vm_flags & VM_LOCKED) { mm->locked_vm += new_len >> PAGE_SHIFT; if (new_len > old_len) - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html