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-rw-r--r--fs/compat.c6
-rw-r--r--fs/exec.c10
-rw-r--r--fs/hugetlbfs/inode.c2
-rw-r--r--fs/namei.c6
-rw-r--r--fs/nfsd/vfs.c14
-rw-r--r--fs/proc/base.c6
6 files changed, 34 insertions, 10 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 681ed81e6be0..bb2a9b2e8173 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1488,7 +1488,7 @@ int compat_do_execve(char * filename,
if (!bprm)
goto out_files;
- retval = mutex_lock_interruptible(&current->cred_exec_mutex);
+ retval = mutex_lock_interruptible(&current->cred_guard_mutex);
if (retval < 0)
goto out_free;
current->in_execve = 1;
@@ -1550,7 +1550,7 @@ int compat_do_execve(char * filename,
/* execve succeeded */
current->fs->in_exec = 0;
current->in_execve = 0;
- mutex_unlock(&current->cred_exec_mutex);
+ mutex_unlock(&current->cred_guard_mutex);
acct_update_integrals(current);
free_bprm(bprm);
if (displaced)
@@ -1573,7 +1573,7 @@ out_unmark:
out_unlock:
current->in_execve = 0;
- mutex_unlock(&current->cred_exec_mutex);
+ mutex_unlock(&current->cred_guard_mutex);
out_free:
free_bprm(bprm);
diff --git a/fs/exec.c b/fs/exec.c
index 895823d0149d..a7fcd975c6b2 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1016,7 +1016,7 @@ void install_exec_creds(struct linux_binprm *bprm)
commit_creds(bprm->cred);
bprm->cred = NULL;
- /* cred_exec_mutex must be held at least to this point to prevent
+ /* cred_guard_mutex must be held at least to this point to prevent
* ptrace_attach() from altering our determination of the task's
* credentials; any time after this it may be unlocked */
@@ -1026,7 +1026,7 @@ EXPORT_SYMBOL(install_exec_creds);
/*
* determine how safe it is to execute the proposed program
- * - the caller must hold current->cred_exec_mutex to protect against
+ * - the caller must hold current->cred_guard_mutex to protect against
* PTRACE_ATTACH
*/
int check_unsafe_exec(struct linux_binprm *bprm)
@@ -1268,7 +1268,7 @@ int do_execve(char * filename,
if (!bprm)
goto out_files;
- retval = mutex_lock_interruptible(&current->cred_exec_mutex);
+ retval = mutex_lock_interruptible(&current->cred_guard_mutex);
if (retval < 0)
goto out_free;
current->in_execve = 1;
@@ -1331,7 +1331,7 @@ int do_execve(char * filename,
/* execve succeeded */
current->fs->in_exec = 0;
current->in_execve = 0;
- mutex_unlock(&current->cred_exec_mutex);
+ mutex_unlock(&current->cred_guard_mutex);
acct_update_integrals(current);
free_bprm(bprm);
if (displaced)
@@ -1354,7 +1354,7 @@ out_unmark:
out_unlock:
current->in_execve = 0;
- mutex_unlock(&current->cred_exec_mutex);
+ mutex_unlock(&current->cred_guard_mutex);
out_free:
free_bprm(bprm);
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index c1462d43e721..941c8425c10b 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -30,6 +30,7 @@
#include <linux/dnotify.h>
#include <linux/statfs.h>
#include <linux/security.h>
+#include <linux/ima.h>
#include <asm/uaccess.h>
@@ -986,6 +987,7 @@ struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag)
&hugetlbfs_file_operations);
if (!file)
goto out_dentry; /* inode is already attached */
+ ima_counts_get(file);
return file;
diff --git a/fs/namei.c b/fs/namei.c
index 967c3db92724..c82805d088e1 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -853,7 +853,8 @@ static int __link_path_walk(const char *name, struct nameidata *nd)
err = inode_permission(nd->path.dentry->d_inode,
MAY_EXEC);
if (!err)
- err = ima_path_check(&nd->path, MAY_EXEC);
+ err = ima_path_check(&nd->path, MAY_EXEC,
+ IMA_COUNT_UPDATE);
if (err)
break;
@@ -1515,7 +1516,8 @@ int may_open(struct path *path, int acc_mode, int flag)
return error;
error = ima_path_check(path,
- acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC));
+ acc_mode & (MAY_READ | MAY_WRITE | MAY_EXEC),
+ IMA_COUNT_UPDATE);
if (error)
return error;
/*
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index b660435978d2..bd584bcf1d9f 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -55,6 +55,7 @@
#include <linux/security.h>
#endif /* CONFIG_NFSD_V4 */
#include <linux/jhash.h>
+#include <linux/ima.h>
#include <asm/uaccess.h>
@@ -735,6 +736,8 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
flags, cred);
if (IS_ERR(*filp))
host_err = PTR_ERR(*filp);
+ else
+ ima_counts_get(*filp);
out_nfserr:
err = nfserrno(host_err);
out:
@@ -2024,6 +2027,7 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
struct dentry *dentry, int acc)
{
struct inode *inode = dentry->d_inode;
+ struct path path;
int err;
if (acc == NFSD_MAY_NOP)
@@ -2096,7 +2100,17 @@ nfsd_permission(struct svc_rqst *rqstp, struct svc_export *exp,
if (err == -EACCES && S_ISREG(inode->i_mode) &&
acc == (NFSD_MAY_READ | NFSD_MAY_OWNER_OVERRIDE))
err = inode_permission(inode, MAY_EXEC);
+ if (err)
+ goto nfsd_out;
+ /* Do integrity (permission) checking now, but defer incrementing
+ * IMA counts to the actual file open.
+ */
+ path.mnt = exp->ex_path.mnt;
+ path.dentry = dentry;
+ err = ima_path_check(&path, acc & (MAY_READ | MAY_WRITE | MAY_EXEC),
+ IMA_COUNT_LEAVE);
+nfsd_out:
return err? nfserrno(err) : 0;
}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 3326bbf9ab95..1539e630c47d 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2128,9 +2128,15 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
if (copy_from_user(page, buf, count))
goto out_free;
+ /* Guard against adverse ptrace interaction */
+ length = mutex_lock_interruptible(&task->cred_guard_mutex);
+ if (length < 0)
+ goto out_free;
+
length = security_setprocattr(task,
(char*)file->f_path.dentry->d_name.name,
(void*)page, count);
+ mutex_unlock(&task->cred_guard_mutex);
out_free:
free_page((unsigned long) page);
out:
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 05:06:18 +0100