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-rw-r--r--security/security.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/security/security.c b/security/security.c
index 18b35c6..a0442b2 100644
--- a/security/security.c
+++ b/security/security.c
@@ -726,16 +726,15 @@ static inline unsigned long mmap_prot(struct file *file, unsigned long prot)
return prot | PROT_EXEC;
/*
* ditto if it's not on noexec mount, except that on !MMU we need
- * BDI_CAP_EXEC_MMAP (== VM_MAYEXEC) in this case
+ * NOMMU_MAP_EXEC (== VM_MAYEXEC) in this case
*/
if (!(file->f_path.mnt->mnt_flags & MNT_NOEXEC)) {
#ifndef CONFIG_MMU
- unsigned long caps = 0;
- struct address_space *mapping = file->f_mapping;
- if (mapping && mapping->backing_dev_info)
- caps = mapping->backing_dev_info->capabilities;
- if (!(caps & BDI_CAP_EXEC_MAP))
- return prot;
+ if (file->f_op->mmap_capabilities) {
+ unsigned caps = file->f_op->mmap_capabilities(file);
+ if (!(caps & NOMMU_MAP_EXEC))
+ return prot;
+ }
#endif
return prot | PROT_EXEC;
}
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