kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Fix VM_MAYEXEC calculation

Browse source 
.. and clean up the file mapping code while at it.  No point in having a
"if (file)" repeated twice, and generally doing similar checks in two
different sections of the same code

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Linus Torvalds 2006-10-15 14:09:55 -07:00
parent a7a0d86f5a
commit 80c5606c3b
1 changed files with 10 additions and 11 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
mm/mmap.c
View file

@ -900,17 +900,6 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
int accountable = 1;
unsigned long charged = 0, reqprot = prot;
if (file) {
if (is_file_hugepages(file))
accountable = 0;
if (!file->f_op || !file->f_op->mmap)
return -ENODEV;
if ((prot & PROT_EXEC) &&
(file->f_vfsmnt->mnt_flags & MNT_NOEXEC))
return -EPERM;
}
/*
* Does the application expect PROT_READ to imply PROT_EXEC?
*
@ -1000,6 +989,16 @@ unsigned long do_mmap_pgoff(struct file * file, unsigned long addr,
case MAP_PRIVATE:
if (!(file->f_mode & FMODE_READ))
return -EACCES;
if (file->f_vfsmnt->mnt_flags & MNT_NOEXEC) {
if (vm_flags & VM_EXEC)
return -EPERM;
vm_flags &= ~VM_MAYEXEC;
}
if (is_file_hugepages(file))
accountable = 0;
if (!file->f_op || !file->f_op->mmap)
return -ENODEV;
break;
default: