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| author | Jeff Layton | 2012-10-10 21:25:28 +0200 |
|---|---|---|
| committer | Al Viro | 2012-10-13 02:15:08 +0200 |
| commit | 7ac86265dc8f665cc49d6e60a125e608cd2fca14 (patch) | |
| tree | 9e7941e2d8dfb2106c5fb28504531dafc72e14e6 /kernel/auditsc.c | |
| parent | vfs: define struct filename and have getname() return it (diff) | |
| download | kernel-qcow2-linux-7ac86265dc8f665cc49d6e60a125e608cd2fca14.tar.gz kernel-qcow2-linux-7ac86265dc8f665cc49d6e60a125e608cd2fca14.tar.xz kernel-qcow2-linux-7ac86265dc8f665cc49d6e60a125e608cd2fca14.zip | |
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/auditsc.c')
| -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 * |