PWN-Hunter/android_kernel_xiaomi_sdm845
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[PATCH] complete message queue auditing

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Handle the edge cases for POSIX message queue auditing. Collect inode
info when opening an existing mq, and for send/receive operations. Remove
audit_inode_update() as it has really evolved into the equivalent of
audit_inode().

Signed-off-by: Amy Griffis <amy.griffis@hp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Amy Griffis 2007-02-13 14:15:01 -05:00 committed by Al Viro
parent 510f4006e7
commit 4fc03b9beb
4 changed files with 5 additions and 35 deletions
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2
fs/namei.c
View File

@ -1719,7 +1719,7 @@ int open_namei(int dfd, const char *pathname, int flag,
* It already exists.
*/
mutex_unlock(&dir->d_inode->i_mutex);
audit_inode_update(path.dentry->d_inode);
audit_inode(pathname, path.dentry->d_inode);
error = -EEXIST;
if (flag & O_EXCL)

7
include/linux/audit.h
View File

@ -355,7 +355,6 @@ extern void audit_putname(const char *name);
extern void __audit_inode(const char *name, const struct inode *inode);
extern void __audit_inode_child(const char *dname, const struct inode *inode,
const struct inode *parent);
extern void __audit_inode_update(const struct inode *inode);
extern void __audit_ptrace(struct task_struct *t);
static inline int audit_dummy_context(void)
@ -378,10 +377,6 @@ static inline void audit_inode_child(const char *dname,
if (unlikely(!audit_dummy_context()))
__audit_inode_child(dname, inode, parent);
}
static inline void audit_inode_update(const struct inode *inode) {
if (unlikely(!audit_dummy_context()))
__audit_inode_update(inode);
}
static inline void audit_ptrace(struct task_struct *t)
{
@ -470,10 +465,8 @@ extern int audit_signals;
#define audit_putname(n) do { ; } while (0)
#define __audit_inode(n,i) do { ; } while (0)
#define __audit_inode_child(d,i,p) do { ; } while (0)
#define __audit_inode_update(i) do { ; } while (0)
#define audit_inode(n,i) do { ; } while (0)
#define audit_inode_child(d,i,p) do { ; } while (0)
#define audit_inode_update(i) do { ; } while (0)
#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
#define audit_get_loginuid(c) ({ -1; })
#define audit_log_task_context(b) do { ; } while (0)

4
ipc/mqueue.c
View File

@ -681,6 +681,7 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
if (oflag & O_CREAT) {
if (dentry->d_inode) { /* entry already exists */
audit_inode(name, dentry->d_inode);
error = -EEXIST;
if (oflag & O_EXCL)
goto out;
@ -693,6 +694,7 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
error = -ENOENT;
if (!dentry->d_inode)
goto out;
audit_inode(name, dentry->d_inode);
filp = do_open(dentry, oflag);
}
@ -840,6 +842,7 @@ asmlinkage long sys_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
if (unlikely(filp->f_op != &mqueue_file_operations))
goto out_fput;
info = MQUEUE_I(inode);
audit_inode(NULL, inode);
if (unlikely(!(filp->f_mode & FMODE_WRITE)))
goto out_fput;
@ -923,6 +926,7 @@ asmlinkage ssize_t sys_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
if (unlikely(filp->f_op != &mqueue_file_operations))
goto out_fput;
info = MQUEUE_I(inode);
audit_inode(NULL, inode);
if (unlikely(!(filp->f_mode & FMODE_READ)))
goto out_fput;

27
kernel/auditsc.c
View File

@ -1475,33 +1475,6 @@ void __audit_inode_child(const char *dname, const struct inode *inode,
}
}
/**
* audit_inode_update - update inode info for last collected name
* @inode: inode being audited
*
* When open() is called on an existing object with the O_CREAT flag, the inode
* data audit initially collects is incorrect. This additional hook ensures
* audit has the inode data for the actual object to be opened.
*/
void __audit_inode_update(const struct inode *inode)
{
struct audit_context *context = current->audit_context;
int idx;
if (!context->in_syscall || !inode)
return;
if (context->name_count == 0) {
context->name_count++;
#if AUDIT_DEBUG
context->ino_count++;
#endif
}
idx = context->name_count - 1;
audit_copy_inode(&context->names[idx], inode);
}
/**
* auditsc_get_stamp - get local copies of audit_context values
* @ctx: audit_context for the task