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authorLinus Torvalds <torvalds@g5.osdl.org>2006-10-15 14:09:55 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-15 14:09:55 -0700
commit80c5606c3b45e0176c32d3108ade1e1cb0b954f3 (patch)
tree441944cc1c2e47e2d34cabb5313c25e03f3284d3
parenta7a0d86f5aa40a2215e36fe21d7911cf718ba428 (diff)
downloadlinux-80c5606c3b45e0176c32d3108ade1e1cb0b954f3.tar.bz2
Fix VM_MAYEXEC calculation
.. 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>
-rw-r--r--mm/mmap.c21
1 files changed, 10 insertions, 11 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index eea8eefd51a8..497e502dfd6b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -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: