diff options
| author | Jeff Layton <jlayton@redhat.com> | 2012-10-10 15:25:28 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-12 20:15:08 -0400 |
| commit | 7ac86265dc8f665cc49d6e60a125e608cd2fca14 (patch) | |
| tree | 9e7941e2d8dfb2106c5fb28504531dafc72e14e6 /kernel | |
| parent | 91a27b2a756784714e924e5e854b919273082d26 (diff) | |
audit: allow audit code to satisfy getname requests from its names_list
Currently, if we call getname() on a userland string more than once,
we'll get multiple copies of the string and multiple audit_names
records.
Add a function that will allow the audit_names code to satisfy getname
requests using info from the audit_names list, avoiding a new allocation
and audit_names records.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/auditsc.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/auditsc.c b/kernel/auditsc.c index d4d82319eed5..521163a5d65f 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -2021,6 +2021,29 @@ static struct audit_names *audit_alloc_name(struct audit_context *context, } /** + * audit_reusename - fill out filename with info from existing entry + * @uptr: userland ptr to pathname + * + * Search the audit_names list for the current audit context. If there is an + * existing entry with a matching "uptr" then return the filename + * associated with that audit_name. If not, return NULL. + */ +struct filename * +__audit_reusename(const __user char *uptr) +{ + struct audit_context *context = current->audit_context; + struct audit_names *n; + + list_for_each_entry(n, &context->names_list, list) { + if (!n->name) + continue; + if (n->name->uptr == uptr) + return n->name; + } + return NULL; +} + +/** * audit_getname - add a name to the list * @name: name to add * |