Most of the callers get called with an inode and dentry in the reverse
order. The compiler then has to reshuffle the arg registers and/or
stack in order to pass them on to audit_inode_child.
Reverse those arguments for a micro-optimization.
Reported-by: Eric Paris <eparis@xxxxxxxxxx>
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
fs/btrfs/ioctl.c | 2 +-
fs/namei.c | 2 +-
include/linux/audit.h | 14 +++++++-------
include/linux/fsnotify.h | 8 ++++----
kernel/auditsc.c | 8 ++++----
5 files changed, 17 insertions(+), 17 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 0e92e57..90c67b0 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -592,7 +592,7 @@ static int btrfs_may_delete(struct inode *dir,struct dentry *victim,int isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(victim, dir);
+ audit_inode_child(dir, victim);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
diff --git a/fs/namei.c b/fs/namei.c
index 5f6a34d..8539f8f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1998,7 +1998,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(victim, dir);
+ audit_inode_child(dir, victim);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 22f292a..51eca54 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -461,8 +461,8 @@ extern void __audit_syscall_exit(int ret_success, long ret_value);
extern void __audit_getname(const char *name);
extern void audit_putname(const char *name);
extern void __audit_inode(const char *name, const struct dentry *dentry);
-extern void __audit_inode_child(const struct dentry *dentry,
- const struct inode *parent);
+extern void __audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry);
extern void __audit_seccomp(unsigned long syscall, long signr, int code);
extern void __audit_ptrace(struct task_struct *t);
@@ -501,10 +501,10 @@ static inline void audit_inode(const char *name, const struct dentry *dentry) {
if (unlikely(!audit_dummy_context()))
__audit_inode(name, dentry);
}
-static inline void audit_inode_child(const struct dentry *dentry,
- const struct inode *parent) {
+static inline void audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry) {
if (unlikely(!audit_dummy_context()))
- __audit_inode_child(dentry, parent);
+ __audit_inode_child(parent, dentry);
}
void audit_core_dumps(long signr);
@@ -630,9 +630,9 @@ extern int audit_signals;
#define audit_getname(n) do { ; } while (0)
#define audit_putname(n) do { ; } while (0)
#define __audit_inode(n,d) do { ; } while (0)
-#define __audit_inode_child(i,p) do { ; } while (0)
+#define __audit_inode_child(p,d) do { ; } while (0)
#define audit_inode(n,d) do { (void)(d); } while (0)
-#define audit_inode_child(i,p) do { ; } while (0)
+#define audit_inode_child(p,d) do { ; } while (0)
#define audit_core_dumps(i) do { ; } while (0)
#define audit_seccomp(i,s,c) do { ; } while (0)
#define auditsc_get_stamp(c,t,s) (0)
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index a6dfe69..9c28471 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -109,7 +109,7 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
if (source)
fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
- audit_inode_child(moved, new_dir);
+ audit_inode_child(new_dir, moved);
}
/*
@@ -155,7 +155,7 @@ static inline void fsnotify_inoderemove(struct inode *inode)
*/
static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
{
- audit_inode_child(dentry, inode);
+ audit_inode_child(inode, dentry);
fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}
@@ -168,7 +168,7 @@ static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
{
fsnotify_link_count(inode);
- audit_inode_child(new_dentry, dir);
+ audit_inode_child(dir, new_dentry);
fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
}
@@ -181,7 +181,7 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
__u32 mask = (FS_CREATE | FS_ISDIR);
struct inode *d_inode = dentry->d_inode;
- audit_inode_child(dentry, inode);
+ audit_inode_child(inode, dentry);
fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 5c45b9b..12b007b 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2176,9 +2176,9 @@ out:
}
/**
- * audit_inode_child - collect inode info for created/removed objects
- * @dentry: dentry being audited
+ * __audit_inode_child - collect inode info for created/removed objects
* @parent: inode of dentry parent
+ * @dentry: dentry being audited
*
* For syscalls that create or remove filesystem objects, audit_inode
* can only collect information for the filesystem object's parent.
@@ -2188,8 +2188,8 @@ out:
* must be hooked prior, in order to capture the target inode during
* unsuccessful attempts.
*/
-void __audit_inode_child(const struct dentry *dentry,
- const struct inode *parent)
+void __audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry)
{
struct audit_context *context = current->audit_context;
const char *found_parent = NULL, *found_child = NULL;
--
1.7.7.6
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