Audit: fix audit watch use after free
When an audit watch is added to a parent the temporary watch inside the
original krule from userspace is freed. Yet the original watch is used after
the real watch was created in audit_add_rules()
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index 713098e..19c0a0a 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -1320,6 +1320,8 @@
mutex_unlock(&audit_filter_mutex);
goto error;
}
+ /* entry->rule.watch may have changed during audit_add_watch() */
+ watch = entry->rule.watch;
h = audit_hash_ino((u32)watch->ino);
list = &audit_inode_hash[h];
}
