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new helper: audit_file()

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... for situations when we don't have any candidate in pathnames - basically,
in descriptor-based syscalls.

[Folded the build fix for !CONFIG_AUDITSYSCALL configs from Chen Gang]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-10-31 17:44:57 -04:00
parent 6f4e0d5aaa
commit 9f45f5bf30
5 changed files with 24 additions and 14 deletions
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4
fs/open.c
View file

@ -516,7 +516,7 @@ SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
int err = -EBADF;
if (f.file) {
audit_inode(NULL, f.file->f_path.dentry, 0);
audit_file(f.file);
err = chmod_common(&f.file->f_path, mode);
fdput(f);
}
@ -642,7 +642,7 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
error = mnt_want_write_file(f.file);
if (error)
goto out_fput;
audit_inode(NULL, f.file->f_path.dentry, 0);
audit_file(f.file);
error = chown_common(&f.file->f_path, user, group);
mnt_drop_write_file(f.file);
out_fput:

16
fs/xattr.c
View file

@ -405,16 +405,14 @@ SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name,
const void __user *,value, size_t, size, int, flags)
{
struct fd f = fdget(fd);
struct dentry *dentry;
int error = -EBADF;
if (!f.file)
return error;
dentry = f.file->f_path.dentry;
audit_inode(NULL, dentry, 0);
audit_file(f.file);
error = mnt_want_write_file(f.file);
if (!error) {
error = setxattr(dentry, name, value, size, flags);
error = setxattr(f.file->f_path.dentry, name, value, size, flags);
mnt_drop_write_file(f.file);
}
fdput(f);
@ -509,7 +507,7 @@ SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name,
if (!f.file)
return error;
audit_inode(NULL, f.file->f_path.dentry, 0);
audit_file(f.file);
error = getxattr(f.file->f_path.dentry, name, value, size);
fdput(f);
return error;
@ -590,7 +588,7 @@ SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size)
if (!f.file)
return error;
audit_inode(NULL, f.file->f_path.dentry, 0);
audit_file(f.file);
error = listxattr(f.file->f_path.dentry, list, size);
fdput(f);
return error;
@ -651,16 +649,14 @@ SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
{
struct fd f = fdget(fd);
struct dentry *dentry;
int error = -EBADF;
if (!f.file)
return error;
dentry = f.file->f_path.dentry;
audit_inode(NULL, dentry, 0);
audit_file(f.file);
error = mnt_want_write_file(f.file);
if (!error) {
error = removexattr(dentry, name);
error = removexattr(f.file->f_path.dentry, name);
mnt_drop_write_file(f.file);
}
fdput(f);

9
include/linux/audit.h
View file

@ -130,6 +130,7 @@ extern void audit_putname(struct filename *name);
#define AUDIT_INODE_HIDDEN 2 /* audit record should be hidden */
extern void __audit_inode(struct filename *name, const struct dentry *dentry,
unsigned int flags);
extern void __audit_file(const struct file *);
extern void __audit_inode_child(const struct inode *parent,
const struct dentry *dentry,
const unsigned char type);
@ -183,6 +184,11 @@ static inline void audit_inode(struct filename *name,
__audit_inode(name, dentry, flags);
}
}
static inline void audit_file(struct file *file)
{
if (unlikely(!audit_dummy_context()))
__audit_file(file);
}
static inline void audit_inode_parent_hidden(struct filename *name,
const struct dentry *dentry)
{
@ -357,6 +363,9 @@ static inline void audit_inode(struct filename *name,
const struct dentry *dentry,
unsigned int parent)
{ }
static inline void audit_file(struct file *file)
{
}
static inline void audit_inode_parent_hidden(struct filename *name,
const struct dentry *dentry)
{ }

4
ipc/mqueue.c
View file

@ -990,7 +990,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr,
goto out_fput;
}
info = MQUEUE_I(inode);
audit_inode(NULL, f.file->f_path.dentry, 0);
audit_file(f.file);
if (unlikely(!(f.file->f_mode & FMODE_WRITE))) {
ret = -EBADF;
@ -1106,7 +1106,7 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
goto out_fput;
}
info = MQUEUE_I(inode);
audit_inode(NULL, f.file->f_path.dentry, 0);
audit_file(f.file);
if (unlikely(!(f.file->f_mode & FMODE_READ))) {
ret = -EBADF;

5
kernel/auditsc.c
View file

@ -1897,6 +1897,11 @@ void __audit_inode(struct filename *name, const struct dentry *dentry,
audit_copy_inode(n, dentry, inode);
}
void __audit_file(const struct file *file)
{
__audit_inode(NULL, file->f_path.dentry, 0);
}
/**
* __audit_inode_child - collect inode info for created/removed objects
* @parent: inode of dentry parent