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audit: set the name_len in audit_inode for parent lookups

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Currently, this gets set mostly by happenstance when we call into
audit_inode_child. While that might be a little more efficient, it seems
wrong. If the syscall ends up failing before audit_inode_child ever gets
called, then you'll have an audit_names record that shows the full path
but has the parent inode info attached.

Fix this by passing in a parent flag when we call audit_inode that gets
set to the value of LOOKUP_PARENT. We can then fix up the pathname for
the audit entry correctly from the get-go.

While we're at it, clean up the no-op macro for audit_inode in the
!CONFIG_AUDITSYSCALL case.

Signed-off-by: Jeff Layton <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Jeff Layton 2012-10-10 15:25:23 -04:00 • committed by Al Viro
commit bfcec70874
8 changed files with 87 additions and 34 deletions
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8
fs/xattr.c
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@ -412,7 +412,7 @@ SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name,
if (!f.file)
return error;
dentry = f.file->f_path.dentry;
audit_inode(NULL, dentry);
audit_inode(NULL, dentry, 0);
error = mnt_want_write_file(f.file);
if (!error) {
error = setxattr(dentry, name, value, size, flags);
@ -507,7 +507,7 @@ SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name,
if (!f.file)
return error;
audit_inode(NULL, f.file->f_path.dentry);
audit_inode(NULL, f.file->f_path.dentry, 0);
error = getxattr(f.file->f_path.dentry, name, value, size);
fdput(f);
return error;
@ -586,7 +586,7 @@ SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size)
if (!f.file)
return error;
audit_inode(NULL, f.file->f_path.dentry);
audit_inode(NULL, f.file->f_path.dentry, 0);
error = listxattr(f.file->f_path.dentry, list, size);
fdput(f);
return error;
@ -655,7 +655,7 @@ SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
if (!f.file)
return error;
dentry = f.file->f_path.dentry;
audit_inode(NULL, dentry);
audit_inode(NULL, dentry, 0);
error = mnt_want_write_file(f.file);
if (!error) {
error = removexattr(dentry, name);