6:23 a.m.
This patchset is another minor respin of the series that I posted June
26th.
The main impetus of this series to to allow the audit_names
infrastructure to properly handle the situation where the lookup and
operation on a path-based syscall is retried.
Along with that, there are a number of bugfixes in this patch, as well
as a few minor optimizations.
This series is available via the "audit" branch of my git tree as well:
git://git.samba.org/jlayton/linux.git audit
I'd like to see this patchset go into 3.7 if at all possible.
Eric Paris (1):
audit: make audit_compare_dname_path use parent_len helper
Jeff Layton (9):
audit: remove unnecessary NULL ptr checks from do_path_lookup
audit: pass in dentry to audit_copy_inode wherever possible
audit: no need to walk list in audit_inode if name is NULL
audit: reverse arguments to audit_inode_child
audit: add a new "type" field to audit_names struct
audit: set the name_len in audit_inode for parent lookups
audit: remove dirlen argument to audit_compare_dname_path
audit: optimize audit_compare_dname_path
audit: overhaul __audit_inode_child to accomodate retrying
fs/btrfs/ioctl.c | 2 +-
fs/namei.c | 22 ++++-----
fs/open.c | 4 +-
fs/xattr.c | 8 ++--
include/linux/audit.h | 36 +++++++++-----
include/linux/fsnotify.h | 8 ++--
ipc/mqueue.c | 8 ++--
kernel/audit.h | 7 ++-
kernel/audit_watch.c | 3 +-
kernel/auditfilter.c | 65 +++++++++++++++++---------
kernel/auditsc.c | 119 +++++++++++++++++++++++++++++------------------
11 files changed, 170 insertions(+), 112 deletions(-)
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 01/10] audit: remove unnecessary NULL ptr checks from do_path_lookup
As best I can tell, whenever retval == 0, nd->path.dentry and nd->inode
are also non-NULL. Eliminate those checks and the superfluous
audit_context check.
Signed-off-by: Eric Paris <eparis(a)redhat.com>
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
fs/namei.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c
index dd1ed1b..e3661762 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1976,12 +1976,8 @@ static int do_path_lookup(int dfd, const char *name,
if (unlikely(retval == -ESTALE))
retval = path_lookupat(dfd, name, flags | LOOKUP_REVAL, nd);
- if (likely(!retval)) {
- if (unlikely(!audit_dummy_context())) {
- if (nd->path.dentry && nd->inode)
- audit_inode(name, nd->path.dentry);
- }
- }
+ if (likely(!retval))
+ audit_inode(name, nd->path.dentry);
return retval;
}
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 02/10] audit: pass in dentry to audit_copy_inode wherever possible
In some cases, we were passing in NULL even when we have a dentry.
Reported-by: Eric Paris <eparis(a)redhat.com>
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
kernel/auditsc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 4b96415..5c45b9b 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2226,7 +2226,7 @@ void __audit_inode_child(const struct dentry *dentry,
if (!strcmp(dname, n->name) ||
!audit_compare_dname_path(dname, n->name, &dirlen)) {
if (inode)
- audit_copy_inode(n, NULL, inode);
+ audit_copy_inode(n, dentry, inode);
else
n->ino = (unsigned long)-1;
found_child = n->name;
@@ -2258,7 +2258,7 @@ add_names:
}
if (inode)
- audit_copy_inode(n, NULL, inode);
+ audit_copy_inode(n, dentry, inode);
}
}
EXPORT_SYMBOL_GPL(__audit_inode_child);
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 03/10] audit: no need to walk list in audit_inode if name is NULL
If name is NULL then the condition in the loop will never be true. Also,
with this change, we can eliminate the check for n->name == NULL since
the equivalence check will never be true if it is.
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
kernel/auditsc.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 5c45b9b..4099440 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2161,11 +2161,15 @@ void __audit_inode(const char *name, const struct dentry *dentry)
if (!context->in_syscall)
return;
+ if (!name)
+ goto out_alloc;
+
list_for_each_entry_reverse(n, &context->names_list, list) {
- if (n->name && (n->name == name))
+ if (n->name == name)
goto out;
}
+out_alloc:
/* unable to find the name from a previous getname() */
n = audit_alloc_name(context);
if (!n)
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 04/10] audit: reverse arguments to audit_inode_child
Most of the callers get called with an inode and dentry in the reverse
order. The compiler then has to reshuffle the arg registers and/or
stack in order to pass them on to audit_inode_child.
Reverse those arguments for a micro-optimization.
Reported-by: Eric Paris <eparis(a)redhat.com>
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
fs/btrfs/ioctl.c | 2 +-
fs/namei.c | 2 +-
include/linux/audit.h | 14 +++++++-------
include/linux/fsnotify.h | 8 ++++----
kernel/auditsc.c | 8 ++++----
5 files changed, 17 insertions(+), 17 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 7bb7556..ceff177 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -614,7 +614,7 @@ static int btrfs_may_delete(struct inode *dir,struct dentry
*victim,int isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(victim, dir);
+ audit_inode_child(dir, victim);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
diff --git a/fs/namei.c b/fs/namei.c
index e3661762..d431111 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2180,7 +2180,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int
isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(victim, dir);
+ audit_inode_child(dir, victim);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 36abf2a..2d8b761 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -462,8 +462,8 @@ extern void __audit_syscall_exit(int ret_success, long ret_value);
extern void __audit_getname(const char *name);
extern void audit_putname(const char *name);
extern void __audit_inode(const char *name, const struct dentry *dentry);
-extern void __audit_inode_child(const struct dentry *dentry,
- const struct inode *parent);
+extern void __audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry);
extern void __audit_seccomp(unsigned long syscall, long signr, int code);
extern void __audit_ptrace(struct task_struct *t);
@@ -502,10 +502,10 @@ static inline void audit_inode(const char *name, const struct dentry
*dentry) {
if (unlikely(!audit_dummy_context()))
__audit_inode(name, dentry);
}
-static inline void audit_inode_child(const struct dentry *dentry,
- const struct inode *parent) {
+static inline void audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry) {
if (unlikely(!audit_dummy_context()))
- __audit_inode_child(dentry, parent);
+ __audit_inode_child(parent, dentry);
}
void audit_core_dumps(long signr);
@@ -631,9 +631,9 @@ extern int audit_signals;
#define audit_getname(n) do { ; } while (0)
#define audit_putname(n) do { ; } while (0)
#define __audit_inode(n,d) do { ; } while (0)
-#define __audit_inode_child(i,p) do { ; } while (0)
+#define __audit_inode_child(p,d) do { ; } while (0)
#define audit_inode(n,d) do { (void)(d); } while (0)
-#define audit_inode_child(i,p) do { ; } while (0)
+#define audit_inode_child(p,d) do { ; } while (0)
#define audit_core_dumps(i) do { ; } while (0)
#define audit_seccomp(i,s,c) do { ; } while (0)
#define auditsc_get_stamp(c,t,s) (0)
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index a6dfe69..9c28471 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -109,7 +109,7 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode
*new_dir,
if (source)
fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
- audit_inode_child(moved, new_dir);
+ audit_inode_child(new_dir, moved);
}
/*
@@ -155,7 +155,7 @@ static inline void fsnotify_inoderemove(struct inode *inode)
*/
static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
{
- audit_inode_child(dentry, inode);
+ audit_inode_child(inode, dentry);
fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE,
dentry->d_name.name, 0);
}
@@ -168,7 +168,7 @@ static inline void fsnotify_create(struct inode *inode, struct dentry
*dentry)
static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry
*new_dentry)
{
fsnotify_link_count(inode);
- audit_inode_child(new_dentry, dir);
+ audit_inode_child(dir, new_dentry);
fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
}
@@ -181,7 +181,7 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry
*dentry)
__u32 mask = (FS_CREATE | FS_ISDIR);
struct inode *d_inode = dentry->d_inode;
- audit_inode_child(dentry, inode);
+ audit_inode_child(inode, dentry);
fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 4099440..ff58089 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2180,9 +2180,9 @@ out:
}
/**
- * audit_inode_child - collect inode info for created/removed objects
- * @dentry: dentry being audited
+ * __audit_inode_child - collect inode info for created/removed objects
* @parent: inode of dentry parent
+ * @dentry: dentry being audited
*
* For syscalls that create or remove filesystem objects, audit_inode
* can only collect information for the filesystem object's parent.
@@ -2192,8 +2192,8 @@ out:
* must be hooked prior, in order to capture the target inode during
* unsuccessful attempts.
*/
-void __audit_inode_child(const struct dentry *dentry,
- const struct inode *parent)
+void __audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry)
{
struct audit_context *context = current->audit_context;
const char *found_parent = NULL, *found_child = NULL;
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 05/10] audit: add a new "type" field to audit_names struct
For now, we just have two possibilities:
UNKNOWN: for a new audit_names record that we don't know anything about yet
NORMAL: for everything else
In later patches, we'll add other types so we can distinguish and update
records created under different circumstances.
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
include/linux/audit.h | 5 +++++
kernel/auditsc.c | 15 ++++++++++-----
2 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 2d8b761..48c49eb 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -450,6 +450,11 @@ struct audit_field {
extern int __init audit_register_class(int class, unsigned *list);
extern int audit_classify_syscall(int abi, unsigned syscall);
extern int audit_classify_arch(int arch);
+
+/* audit_names->type values */
+#define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
+#define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
+
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
/* Public API */
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index ff58089..bd11d09 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -120,6 +120,7 @@ struct audit_names {
struct audit_cap_data fcap;
unsigned int fcap_ver;
int name_len; /* number of name's characters to log */
+ unsigned char type; /* record type */
bool name_put; /* call __putname() for this name */
/*
* This was an allocated audit_names and not from the array of
@@ -2009,7 +2010,8 @@ retry:
#endif
}
-static struct audit_names *audit_alloc_name(struct audit_context *context)
+static struct audit_names *audit_alloc_name(struct audit_context *context,
+ unsigned char type)
{
struct audit_names *aname;
@@ -2024,6 +2026,7 @@ static struct audit_names *audit_alloc_name(struct audit_context
*context)
}
aname->ino = (unsigned long)-1;
+ aname->type = type;
list_add_tail(&aname->list, &context->names_list);
context->name_count++;
@@ -2054,7 +2057,7 @@ void __audit_getname(const char *name)
return;
}
- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
if (!n)
return;
@@ -2171,12 +2174,13 @@ void __audit_inode(const char *name, const struct dentry *dentry)
out_alloc:
/* unable to find the name from a previous getname() */
- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
if (!n)
return;
out:
handle_path(dentry);
audit_copy_inode(n, dentry, inode);
+ n->type = AUDIT_TYPE_NORMAL;
}
/**
@@ -2233,6 +2237,7 @@ void __audit_inode_child(const struct inode *parent,
audit_copy_inode(n, dentry, inode);
else
n->ino = (unsigned long)-1;
+ n->type = AUDIT_TYPE_NORMAL;
found_child = n->name;
goto add_names;
}
@@ -2240,14 +2245,14 @@ void __audit_inode_child(const struct inode *parent,
add_names:
if (!found_parent) {
- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
if (!n)
return;
audit_copy_inode(n, NULL, parent);
}
if (!found_child) {
- n = audit_alloc_name(context);
+ n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
if (!n)
return;
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 06/10] audit: set the name_len in audit_inode for parent lookups
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 <jlayton(a)redhat.com>
---
fs/namei.c | 14 +++++++-------
fs/open.c | 4 ++--
fs/xattr.c | 8 ++++----
include/linux/audit.h | 13 ++++++++-----
ipc/mqueue.c | 8 ++++----
kernel/audit.h | 1 +
kernel/auditfilter.c | 30 ++++++++++++++++++++++++++++++
kernel/auditsc.c | 41 +++++++++++++++++++++++++++++------------
8 files changed, 85 insertions(+), 34 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c
index d431111..6c9d86d 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1977,7 +1977,7 @@ static int do_path_lookup(int dfd, const char *name,
retval = path_lookupat(dfd, name, flags | LOOKUP_REVAL, nd);
if (likely(!retval))
- audit_inode(name, nd->path.dentry);
+ audit_inode(name, nd->path.dentry, flags & LOOKUP_PARENT);
return retval;
}
@@ -2652,7 +2652,7 @@ static int do_last(struct nameidata *nd, struct path *path,
error = complete_walk(nd);
if (error)
return error;
- audit_inode(pathname, nd->path.dentry);
+ audit_inode(pathname, nd->path.dentry, 0);
if (open_flag & O_CREAT) {
error = -EISDIR;
goto out;
@@ -2662,7 +2662,7 @@ static int do_last(struct nameidata *nd, struct path *path,
error = complete_walk(nd);
if (error)
return error;
- audit_inode(pathname, dir);
+ audit_inode(pathname, dir, 0);
goto finish_open;
}
@@ -2691,7 +2691,7 @@ static int do_last(struct nameidata *nd, struct path *path,
if (error)
return error;
- audit_inode(pathname, dir);
+ audit_inode(pathname, dir, 0);
error = -EISDIR;
/* trailing slashes? */
if (nd->last.name[nd->last.len])
@@ -2721,7 +2721,7 @@ retry_lookup:
!S_ISREG(file->f_path.dentry->d_inode->i_mode))
will_truncate = false;
- audit_inode(pathname, file->f_path.dentry);
+ audit_inode(pathname, file->f_path.dentry, 0);
goto opened;
}
@@ -2738,7 +2738,7 @@ retry_lookup:
* create/update audit record if it already exists.
*/
if (path->dentry->d_inode)
- audit_inode(pathname, path->dentry);
+ audit_inode(pathname, path->dentry, 0);
/*
* If atomic_open() acquired write access it is dropped now due to
@@ -2803,7 +2803,7 @@ finish_lookup:
error = -ENOTDIR;
if ((nd->flags & LOOKUP_DIRECTORY) && !nd->inode->i_op->lookup)
goto out;
- audit_inode(pathname, nd->path.dentry);
+ audit_inode(pathname, nd->path.dentry, 0);
finish_open:
if (!S_ISREG(nd->inode->i_mode))
will_truncate = false;
diff --git a/fs/open.c b/fs/open.c
index e1f2cdb..ec06921 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -481,7 +481,7 @@ SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
file = fget(fd);
if (file) {
- audit_inode(NULL, file->f_path.dentry);
+ audit_inode(NULL, file->f_path.dentry, 0);
err = chmod_common(&file->f_path, mode);
fput(file);
}
@@ -594,7 +594,7 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
if (error)
goto out_fput;
dentry = file->f_path.dentry;
- audit_inode(NULL, dentry);
+ audit_inode(NULL, dentry, 0);
error = chown_common(&file->f_path, user, group);
mnt_drop_write_file(file);
out_fput:
diff --git a/fs/xattr.c b/fs/xattr.c
index 4d45b71..588455b 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -408,7 +408,7 @@ SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name,
if (!f)
return error;
dentry = f->f_path.dentry;
- audit_inode(NULL, dentry);
+ audit_inode(NULL, dentry, 0);
error = mnt_want_write_file(f);
if (!error) {
error = setxattr(dentry, name, value, size, flags);
@@ -502,7 +502,7 @@ SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name,
f = fget_light(fd, &fput_needed);
if (!f)
return error;
- audit_inode(NULL, f->f_path.dentry);
+ audit_inode(NULL, f->f_path.dentry, 0);
error = getxattr(f->f_path.dentry, name, value, size);
fput_light(f, fput_needed);
return error;
@@ -583,7 +583,7 @@ SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t,
size)
f = fget_light(fd, &fput_needed);
if (!f)
return error;
- audit_inode(NULL, f->f_path.dentry);
+ audit_inode(NULL, f->f_path.dentry, 0);
error = listxattr(f->f_path.dentry, list, size);
fput_light(f, fput_needed);
return error;
@@ -654,7 +654,7 @@ SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
if (!f)
return error;
dentry = f->f_path.dentry;
- audit_inode(NULL, dentry);
+ audit_inode(NULL, dentry, 0);
error = mnt_want_write_file(f);
if (!error) {
error = removexattr(dentry, name);
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 48c49eb..155524b 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -454,6 +454,7 @@ extern int audit_classify_arch(int arch);
/* audit_names->type values */
#define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
#define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
+#define AUDIT_TYPE_PARENT 2 /* a parent audit record */
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
@@ -466,7 +467,8 @@ extern void __audit_syscall_entry(int arch,
extern void __audit_syscall_exit(int ret_success, long ret_value);
extern void __audit_getname(const char *name);
extern void audit_putname(const char *name);
-extern void __audit_inode(const char *name, const struct dentry *dentry);
+extern void __audit_inode(const char *name, const struct dentry *dentry,
+ unsigned int parent);
extern void __audit_inode_child(const struct inode *parent,
const struct dentry *dentry);
extern void __audit_seccomp(unsigned long syscall, long signr, int code);
@@ -503,9 +505,10 @@ static inline void audit_getname(const char *name)
if (unlikely(!audit_dummy_context()))
__audit_getname(name);
}
-static inline void audit_inode(const char *name, const struct dentry *dentry) {
+static inline void audit_inode(const char *name, const struct dentry *dentry,
+ unsigned int parent) {
if (unlikely(!audit_dummy_context()))
- __audit_inode(name, dentry);
+ __audit_inode(name, dentry, parent);
}
static inline void audit_inode_child(const struct inode *parent,
const struct dentry *dentry) {
@@ -635,9 +638,9 @@ extern int audit_signals;
#define audit_dummy_context() 1
#define audit_getname(n) do { ; } while (0)
#define audit_putname(n) do { ; } while (0)
-#define __audit_inode(n,d) do { ; } while (0)
+#define __audit_inode(n,d,p) do { ; } while (0)
#define __audit_inode_child(p,d) do { ; } while (0)
-#define audit_inode(n,d) do { (void)(d); } while (0)
+#define audit_inode(n,d,p) do { ; } while (0)
#define audit_inode_child(p,d) do { ; } while (0)
#define audit_core_dumps(i) do { ; } while (0)
#define audit_seccomp(i,s,c) do { ; } while (0)
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 9a08acc..69cb5fe 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -805,7 +805,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag,
umode_t, mode,
if (oflag & O_CREAT) {
if (path.dentry->d_inode) { /* entry already exists */
- audit_inode(name, path.dentry);
+ audit_inode(name, path.dentry, 0);
if (oflag & O_EXCL) {
error = -EEXIST;
goto out;
@@ -825,7 +825,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag,
umode_t, mode,
error = -ENOENT;
goto out;
}
- audit_inode(name, path.dentry);
+ audit_inode(name, path.dentry, 0);
filp = do_open(&path, oflag);
}
@@ -979,7 +979,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *,
u_msg_ptr,
goto out_fput;
}
info = MQUEUE_I(inode);
- audit_inode(NULL, filp->f_path.dentry);
+ audit_inode(NULL, filp->f_path.dentry, 0);
if (unlikely(!(filp->f_mode & FMODE_WRITE))) {
ret = -EBADF;
@@ -1096,7 +1096,7 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *,
u_msg_ptr,
goto out_fput;
}
info = MQUEUE_I(inode);
- audit_inode(NULL, filp->f_path.dentry);
+ audit_inode(NULL, filp->f_path.dentry, 0);
if (unlikely(!(filp->f_mode & FMODE_READ))) {
ret = -EBADF;
diff --git a/kernel/audit.h b/kernel/audit.h
index 8167668..276ca88 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -76,6 +76,7 @@ static inline int audit_hash_ino(u32 ino)
extern int audit_match_class(int class, unsigned syscall);
extern int audit_comparator(const u32 left, const u32 op, const u32 right);
+extern int parent_len(const char *path);
extern int audit_compare_dname_path(const char *dname, const char *path,
int *dirlen);
extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index a6c3f1a..29b167b 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1198,6 +1198,36 @@ int audit_comparator(u32 left, u32 op, u32 right)
}
}
+/**
+ * parent_len - find the length of the parent portion of a pathname
+ * @path: pathname of which to determine length
+ */
+int parent_len(const char *path)
+{
+ int plen;
+ const char *p;
+
+ plen = strlen(path);
+
+ if (plen == 0)
+ return plen;
+
+ /* disregard trailing slashes */
+ p = path + plen - 1;
+ while ((*p == '/') && (p > path))
+ p--;
+
+ /* walk backward until we find the next slash or hit beginning */
+ while ((*p != '/') && (p > path))
+ p--;
+
+ /* did we find a slash? Then increment to include it in path */
+ if (*p == '/')
+ p++;
+
+ return p - path;
+}
+
/* Compare given dentry name with last component in given path,
* return of 0 indicates a match. */
int audit_compare_dname_path(const char *dname, const char *path,
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index bd11d09..011e923 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2149,13 +2149,13 @@ static void audit_copy_inode(struct audit_names *name, const
struct dentry *dent
}
/**
- * audit_inode - store the inode and device from a lookup
+ * __audit_inode - store the inode and device from a lookup
* @name: name being audited
* @dentry: dentry being audited
- *
- * Called from fs/namei.c:path_lookup().
+ * @parent: does this dentry represent the parent?
*/
-void __audit_inode(const char *name, const struct dentry *dentry)
+void __audit_inode(const char *name, const struct dentry *dentry,
+ unsigned int parent)
{
struct audit_context *context = current->audit_context;
const struct inode *inode = dentry->d_inode;
@@ -2168,19 +2168,38 @@ void __audit_inode(const char *name, const struct dentry *dentry)
goto out_alloc;
list_for_each_entry_reverse(n, &context->names_list, list) {
- if (n->name == name)
- goto out;
+ /* does the name pointer match? */
+ if (n->name != name)
+ continue;
+
+ /* match the correct record type */
+ if (parent) {
+ if (n->type == AUDIT_TYPE_PARENT ||
+ n->type == AUDIT_TYPE_UNKNOWN)
+ goto out;
+ } else {
+ if (n->type != AUDIT_TYPE_PARENT)
+ goto out;
+ }
}
out_alloc:
- /* unable to find the name from a previous getname() */
+ /* unable to find the name from a previous getname(). Allocate a new
+ * anonymous entry.
+ */
n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
if (!n)
return;
out:
+ if (parent) {
+ n->name_len = n->name ? parent_len(n->name) : AUDIT_NAME_FULL;
+ n->type = AUDIT_TYPE_PARENT;
+ } else {
+ n->name_len = AUDIT_NAME_FULL;
+ n->type = AUDIT_TYPE_NORMAL;
+ }
handle_path(dentry);
audit_copy_inode(n, dentry, inode);
- n->type = AUDIT_TYPE_NORMAL;
}
/**
@@ -2204,7 +2223,6 @@ void __audit_inode_child(const struct inode *parent,
const struct inode *inode = dentry->d_inode;
const char *dname = dentry->d_name.name;
struct audit_names *n;
- int dirlen = 0;
if (!context->in_syscall)
return;
@@ -2218,8 +2236,7 @@ void __audit_inode_child(const struct inode *parent,
continue;
if (n->ino == parent->i_ino &&
- !audit_compare_dname_path(dname, n->name, &dirlen)) {
- n->name_len = dirlen; /* update parent data in place */
+ !audit_compare_dname_path(dname, n->name, NULL)) {
found_parent = n->name;
goto add_names;
}
@@ -2232,7 +2249,7 @@ void __audit_inode_child(const struct inode *parent,
/* strcmp() is the more likely scenario */
if (!strcmp(dname, n->name) ||
- !audit_compare_dname_path(dname, n->name, &dirlen)) {
+ !audit_compare_dname_path(dname, n->name, NULL)) {
if (inode)
audit_copy_inode(n, dentry, inode);
else
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 07/10] audit: remove dirlen argument to audit_compare_dname_path
All the callers set this to NULL now.
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
kernel/audit.h | 3 +--
kernel/audit_watch.c | 2 +-
kernel/auditfilter.c | 6 +-----
kernel/auditsc.c | 4 ++--
4 files changed, 5 insertions(+), 10 deletions(-)
diff --git a/kernel/audit.h b/kernel/audit.h
index 276ca88..ee31316 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -77,8 +77,7 @@ static inline int audit_hash_ino(u32 ino)
extern int audit_match_class(int class, unsigned syscall);
extern int audit_comparator(const u32 left, const u32 op, const u32 right);
extern int parent_len(const char *path);
-extern int audit_compare_dname_path(const char *dname, const char *path,
- int *dirlen);
+extern int audit_compare_dname_path(const char *dname, const char *path);
extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
int done, int multi,
const void *payload, int size);
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 3823281..b6a873a 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -265,7 +265,7 @@ static void audit_update_watch(struct audit_parent *parent,
/* Run all of the watches on this parent looking for the one that
* matches the given dname */
list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
- if (audit_compare_dname_path(dname, owatch->path, NULL))
+ if (audit_compare_dname_path(dname, owatch->path))
continue;
/* If the update involves invalidating rules, do the inode-based
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 29b167b..f9c48d0 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1230,8 +1230,7 @@ int parent_len(const char *path)
/* Compare given dentry name with last component in given path,
* return of 0 indicates a match. */
-int audit_compare_dname_path(const char *dname, const char *path,
- int *dirlen)
+int audit_compare_dname_path(const char *dname, const char *path)
{
int dlen, plen;
const char *p;
@@ -1260,9 +1259,6 @@ int audit_compare_dname_path(const char *dname, const char *path,
p++;
}
- /* return length of path's directory component */
- if (dirlen)
- *dirlen = p - path;
return strncmp(p, dname, dlen);
}
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 011e923..b03ef6a 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2236,7 +2236,7 @@ void __audit_inode_child(const struct inode *parent,
continue;
if (n->ino == parent->i_ino &&
- !audit_compare_dname_path(dname, n->name, NULL)) {
+ !audit_compare_dname_path(dname, n->name)) {
found_parent = n->name;
goto add_names;
}
@@ -2249,7 +2249,7 @@ void __audit_inode_child(const struct inode *parent,
/* strcmp() is the more likely scenario */
if (!strcmp(dname, n->name) ||
- !audit_compare_dname_path(dname, n->name, NULL)) {
+ !audit_compare_dname_path(dname, n->name)) {
if (inode)
audit_copy_inode(n, dentry, inode);
else
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 08/10] audit: make audit_compare_dname_path use parent_len helper
From: Eric Paris <eparis(a)redhat.com>
Signed-off-by: Eric Paris <eparis(a)redhat.com>
---
kernel/auditfilter.c | 27 +++++++--------------------
1 file changed, 7 insertions(+), 20 deletions(-)
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index f9c48d0..f47ba18 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1232,32 +1232,19 @@ int parent_len(const char *path)
* return of 0 indicates a match. */
int audit_compare_dname_path(const char *dname, const char *path)
{
- int dlen, plen;
+ int dlen, pathlen, parentlen;
const char *p;
- if (!dname || !path)
- return 1;
-
dlen = strlen(dname);
- plen = strlen(path);
- if (plen < dlen)
+ pathlen = strlen(path);
+ if (pathlen < dlen)
return 1;
- /* disregard trailing slashes */
- p = path + plen - 1;
- while ((*p == '/') && (p > path))
- p--;
-
- /* find last path component */
- p = p - dlen + 1;
- if (p < path)
+ parentlen = parent_len(path);
+ if (pathlen - parentlen != dlen)
return 1;
- else if (p > path) {
- if (*--p != '/')
- return 1;
- else
- p++;
- }
+
+ p = path + parentlen;
return strncmp(p, dname, dlen);
}
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 09/10] audit: optimize audit_compare_dname_path
In the cases where we already know the length of the parent, pass it as
a parm so we don't need to recompute it. In the cases where we don't
know the length, pass in AUDIT_NAME_FULL (-1) to indicate that it should
be determined.
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
kernel/audit.h | 5 ++++-
kernel/audit_watch.c | 3 ++-
kernel/auditfilter.c | 16 +++++++++++-----
kernel/auditsc.c | 8 +++-----
4 files changed, 20 insertions(+), 12 deletions(-)
diff --git a/kernel/audit.h b/kernel/audit.h
index ee31316..34af33c 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -74,10 +74,13 @@ static inline int audit_hash_ino(u32 ino)
return (ino & (AUDIT_INODE_BUCKETS-1));
}
+/* Indicates that audit should log the full pathname. */
+#define AUDIT_NAME_FULL -1
+
extern int audit_match_class(int class, unsigned syscall);
extern int audit_comparator(const u32 left, const u32 op, const u32 right);
extern int parent_len(const char *path);
-extern int audit_compare_dname_path(const char *dname, const char *path);
+extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
int done, int multi,
const void *payload, int size);
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index b6a873a..f8e9353 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -265,7 +265,8 @@ static void audit_update_watch(struct audit_parent *parent,
/* Run all of the watches on this parent looking for the one that
* matches the given dname */
list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
- if (audit_compare_dname_path(dname, owatch->path))
+ if (audit_compare_dname_path(dname, owatch->path,
+ AUDIT_NAME_FULL))
continue;
/* If the update involves invalidating rules, do the inode-based
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index f47ba18..1e0899d 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1228,11 +1228,17 @@ int parent_len(const char *path)
return p - path;
}
-/* Compare given dentry name with last component in given path,
- * return of 0 indicates a match. */
-int audit_compare_dname_path(const char *dname, const char *path)
+/**
+ * audit_compare_dname_path - compare given dentry name with last component in
+ * given path. Return of 0 indicates a match.
+ * @dname: dentry name that we're comparing
+ * @path: full pathname that we're comparing
+ * @parentlen: length of the parent if known. Passing in AUDIT_NAME_FULL
+ * here indicates that we must compute this value.
+ */
+int audit_compare_dname_path(const char *dname, const char *path, int parentlen)
{
- int dlen, pathlen, parentlen;
+ int dlen, pathlen;
const char *p;
dlen = strlen(dname);
@@ -1240,7 +1246,7 @@ int audit_compare_dname_path(const char *dname, const char *path)
if (pathlen < dlen)
return 1;
- parentlen = parent_len(path);
+ parentlen = parentlen == AUDIT_NAME_FULL ? parent_len(path) : parentlen;
if (pathlen - parentlen != dlen)
return 1;
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index b03ef6a..52d1f0f 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -81,9 +81,6 @@
* a name dynamically and also add those to the list anchored by names_list. */
#define AUDIT_NAMES 5
-/* Indicates that audit should log the full pathname. */
-#define AUDIT_NAME_FULL -1
-
/* no execve audit message should be longer than this (userspace limits) */
#define MAX_EXECVE_AUDIT_LEN 7500
@@ -2236,7 +2233,7 @@ void __audit_inode_child(const struct inode *parent,
continue;
if (n->ino == parent->i_ino &&
- !audit_compare_dname_path(dname, n->name)) {
+ !audit_compare_dname_path(dname, n->name, n->name_len)) {
found_parent = n->name;
goto add_names;
}
@@ -2249,7 +2246,8 @@ void __audit_inode_child(const struct inode *parent,
/* strcmp() is the more likely scenario */
if (!strcmp(dname, n->name) ||
- !audit_compare_dname_path(dname, n->name)) {
+ !audit_compare_dname_path(dname, n->name,
+ AUDIT_NAME_FULL)) {
if (inode)
audit_copy_inode(n, dentry, inode);
else
--
1.7.11.4
6:23 a.m.
New subject: [PATCH v6 10/10] audit: overhaul __audit_inode_child to accomodate retrying
In order to accomodate retrying path-based syscalls, we need to add a
new "type" argument to audit_inode_child. This will tell us whether
we're looking for a child entry that represents a create or a delete.
If we find a parent, don't automatically assume that we need to create a
new entry. Instead, use the information we have to try to find an
existing entry first. Update it if one is found and create a new one if
not.
Signed-off-by: Jeff Layton <jlayton(a)redhat.com>
---
fs/btrfs/ioctl.c | 2 +-
fs/namei.c | 2 +-
include/linux/audit.h | 12 ++++++----
include/linux/fsnotify.h | 8 +++----
kernel/auditsc.c | 57 +++++++++++++++++++++++++-----------------------
5 files changed, 44 insertions(+), 37 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index ceff177..35c7ccd 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -614,7 +614,7 @@ static int btrfs_may_delete(struct inode *dir,struct dentry
*victim,int isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(dir, victim);
+ audit_inode_child(dir, victim, AUDIT_TYPE_CHILD_DELETE);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
diff --git a/fs/namei.c b/fs/namei.c
index 6c9d86d..64f7350 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2180,7 +2180,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int
isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(dir, victim);
+ audit_inode_child(dir, victim, AUDIT_TYPE_CHILD_DELETE);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 155524b..0f7284a 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -455,6 +455,8 @@ extern int audit_classify_arch(int arch);
#define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
#define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
#define AUDIT_TYPE_PARENT 2 /* a parent audit record */
+#define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
+#define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
@@ -470,7 +472,8 @@ extern void audit_putname(const char *name);
extern void __audit_inode(const char *name, const struct dentry *dentry,
unsigned int parent);
extern void __audit_inode_child(const struct inode *parent,
- const struct dentry *dentry);
+ const struct dentry *dentry,
+ const unsigned char type);
extern void __audit_seccomp(unsigned long syscall, long signr, int code);
extern void __audit_ptrace(struct task_struct *t);
@@ -511,9 +514,10 @@ static inline void audit_inode(const char *name, const struct dentry
*dentry,
__audit_inode(name, dentry, parent);
}
static inline void audit_inode_child(const struct inode *parent,
- const struct dentry *dentry) {
+ const struct dentry *dentry,
+ const unsigned char type) {
if (unlikely(!audit_dummy_context()))
- __audit_inode_child(parent, dentry);
+ __audit_inode_child(parent, dentry, type);
}
void audit_core_dumps(long signr);
@@ -641,7 +645,7 @@ extern int audit_signals;
#define __audit_inode(n,d,p) do { ; } while (0)
#define __audit_inode_child(p,d) do { ; } while (0)
#define audit_inode(n,d,p) do { ; } while (0)
-#define audit_inode_child(p,d) do { ; } while (0)
+#define audit_inode_child(p,d,t) do { ; } while (0)
#define audit_core_dumps(i) do { ; } while (0)
#define audit_seccomp(i,s,c) do { ; } while (0)
#define auditsc_get_stamp(c,t,s) (0)
diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h
index 9c28471..0fbfb46 100644
--- a/include/linux/fsnotify.h
+++ b/include/linux/fsnotify.h
@@ -109,7 +109,7 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode
*new_dir,
if (source)
fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
- audit_inode_child(new_dir, moved);
+ audit_inode_child(new_dir, moved, AUDIT_TYPE_CHILD_CREATE);
}
/*
@@ -155,7 +155,7 @@ static inline void fsnotify_inoderemove(struct inode *inode)
*/
static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
{
- audit_inode_child(inode, dentry);
+ audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE,
dentry->d_name.name, 0);
}
@@ -168,7 +168,7 @@ static inline void fsnotify_create(struct inode *inode, struct dentry
*dentry)
static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry
*new_dentry)
{
fsnotify_link_count(inode);
- audit_inode_child(dir, new_dentry);
+ audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
}
@@ -181,7 +181,7 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry
*dentry)
__u32 mask = (FS_CREATE | FS_ISDIR);
struct inode *d_inode = dentry->d_inode;
- audit_inode_child(inode, dentry);
+ audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 52d1f0f..2f20b97 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2203,6 +2203,7 @@ out:
* __audit_inode_child - collect inode info for created/removed objects
* @parent: inode of dentry parent
* @dentry: dentry being audited
+ * @type: AUDIT_TYPE_* value that we're looking for
*
* For syscalls that create or remove filesystem objects, audit_inode
* can only collect information for the filesystem object's parent.
@@ -2213,13 +2214,13 @@ out:
* unsuccessful attempts.
*/
void __audit_inode_child(const struct inode *parent,
- const struct dentry *dentry)
+ const struct dentry *dentry,
+ const unsigned char type)
{
struct audit_context *context = current->audit_context;
- const char *found_parent = NULL, *found_child = NULL;
const struct inode *inode = dentry->d_inode;
const char *dname = dentry->d_name.name;
- struct audit_names *n;
+ struct audit_names *n, *found_parent = NULL, *found_child = NULL;
if (!context->in_syscall)
return;
@@ -2227,63 +2228,65 @@ void __audit_inode_child(const struct inode *parent,
if (inode)
handle_one(inode);
- /* parent is more likely, look for it first */
+ /* look for a parent entry first */
list_for_each_entry(n, &context->names_list, list) {
- if (!n->name)
+ if (!n->name || n->type != AUDIT_TYPE_PARENT)
continue;
if (n->ino == parent->i_ino &&
!audit_compare_dname_path(dname, n->name, n->name_len)) {
- found_parent = n->name;
- goto add_names;
+ found_parent = n;
+ break;
}
}
- /* no matching parent, look for matching child */
+ /* is there a matching child entry? */
list_for_each_entry(n, &context->names_list, list) {
- if (!n->name)
+ /* can only match entries that have a name */
+ if (!n->name || n->type != type)
+ continue;
+
+ /* if we found a parent, make sure this one is a child of it */
+ if (found_parent && (n->name != found_parent->name))
continue;
- /* strcmp() is the more likely scenario */
if (!strcmp(dname, n->name) ||
!audit_compare_dname_path(dname, n->name,
+ found_parent ?
+ found_parent->name_len :
AUDIT_NAME_FULL)) {
- if (inode)
- audit_copy_inode(n, dentry, inode);
- else
- n->ino = (unsigned long)-1;
- n->type = AUDIT_TYPE_NORMAL;
- found_child = n->name;
- goto add_names;
+ found_child = n;
+ break;
}
}
-add_names:
if (!found_parent) {
- n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
+ /* create a new, "anonymous" parent record */
+ n = audit_alloc_name(context, AUDIT_TYPE_PARENT);
if (!n)
return;
audit_copy_inode(n, NULL, parent);
}
if (!found_child) {
- n = audit_alloc_name(context, AUDIT_TYPE_NORMAL);
- if (!n)
+ found_child = audit_alloc_name(context, type);
+ if (!found_child)
return;
/* Re-use the name belonging to the slot for a matching parent
* directory. All names for this context are relinquished in
* audit_free_names() */
if (found_parent) {
- n->name = found_parent;
- n->name_len = AUDIT_NAME_FULL;
+ found_child->name = found_parent->name;
+ found_child->name_len = AUDIT_NAME_FULL;
/* don't call __putname() */
- n->name_put = false;
+ found_child->name_put = false;
}
-
- if (inode)
- audit_copy_inode(n, dentry, inode);
}
+ if (inode)
+ audit_copy_inode(found_child, dentry, inode);
+ else
+ found_child->ino = (unsigned long)-1;
}
EXPORT_SYMBOL_GPL(__audit_inode_child);
--
1.7.11.4
4488
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4488
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linux-audit@lists.linux-audit.osci.io
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Jeff Layton