Merge branch 'bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

* 'bugfixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  integrity: add ima_counts_put (updated)
  integrity: ima audit hash_exists fix
  integrity: ima mq_open imbalance msg fix
This commit is contained in:
Linus Torvalds 2009-06-29 09:44:44 -07:00
commit bb1e9b844b
5 changed files with 45 additions and 2 deletions

View File

@ -1761,6 +1761,10 @@ do_last:
goto exit;
}
filp = nameidata_to_filp(&nd, open_flag);
if (IS_ERR(filp))
ima_counts_put(&nd.path,
acc_mode & (MAY_READ | MAY_WRITE |
MAY_EXEC));
mnt_drop_write(nd.path.mnt);
if (nd.root.mnt)
path_put(&nd.root);
@ -1817,6 +1821,9 @@ ok:
goto exit;
}
filp = nameidata_to_filp(&nd, open_flag);
if (IS_ERR(filp))
ima_counts_put(&nd.path,
acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC));
/*
* It is now safe to drop the mnt write
* because the filp has had a write taken

View File

@ -24,6 +24,7 @@ extern int ima_path_check(struct path *path, int mask, int update_counts);
extern void ima_file_free(struct file *file);
extern int ima_file_mmap(struct file *file, unsigned long prot);
extern void ima_counts_get(struct file *file);
extern void ima_counts_put(struct path *path, int mask);
#else
static inline int ima_bprm_check(struct linux_binprm *bprm)
@ -60,5 +61,10 @@ static inline void ima_counts_get(struct file *file)
{
return;
}
static inline void ima_counts_put(struct path *path, int mask)
{
return;
}
#endif /* CONFIG_IMA_H */
#endif /* _LINUX_IMA_H */

View File

@ -32,6 +32,7 @@
#include <linux/nsproxy.h>
#include <linux/pid.h>
#include <linux/ipc_namespace.h>
#include <linux/ima.h>
#include <net/sock.h>
#include "util.h"
@ -733,6 +734,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, mode_t, mode,
error = PTR_ERR(filp);
goto out_putfd;
}
ima_counts_get(filp);
fd_install(fd, filp);
goto out_upsem;

View File

@ -238,7 +238,34 @@ out:
}
/*
* ima_opens_get - increment file counts
* ima_counts_put - decrement file counts
*
* File counts are incremented in ima_path_check. On file open
* error, such as ETXTBSY, decrement the counts to prevent
* unnecessary imbalance messages.
*/
void ima_counts_put(struct path *path, int mask)
{
struct inode *inode = path->dentry->d_inode;
struct ima_iint_cache *iint;
if (!ima_initialized || !S_ISREG(inode->i_mode))
return;
iint = ima_iint_find_insert_get(inode);
if (!iint)
return;
mutex_lock(&iint->mutex);
iint->opencount--;
if ((mask & MAY_WRITE) || (mask == 0))
iint->writecount--;
else if (mask & (MAY_READ | MAY_EXEC))
iint->readcount--;
mutex_unlock(&iint->mutex);
}
/*
* ima_counts_get - increment file counts
*
* - for IPC shm and shmat file.
* - for nfsd exported files.

View File

@ -134,7 +134,8 @@ int ima_add_template_entry(struct ima_template_entry *entry, int violation,
}
out:
mutex_unlock(&ima_extend_list_mutex);
integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, entry->template_name,
integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode,
entry->template.file_name,
op, audit_cause, result, audit_info);
return result;
}