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| author | Hannes Reinecke <hare@suse.de> | 2012-04-16 15:06:25 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-18 15:39:52 -0700 |
| commit | a15d49fd3094cff90e5410ca454a870e0a722fe1 (patch) | |
| tree | f3e458fa4ce3524f756e0faa48d5ed2400c022bf /lib | |
| parent | 97ec448aeadff55234368a89c4a07a7ef290a084 (diff) | |
| download | linux-a15d49fd3094cff90e5410ca454a870e0a722fe1.tar.bz2 | |
driver core: check start node in klist_iter_init_node
klist_iter_init_node() takes a node as a start argument.
However, this node might not be valid anymore.
This patch updates the klist_iter_init_node() and
dependent functions to return an error if so.
All calling functions have been audited to check
for a return code here.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Cc: Greg Kroah-Hartmann <gregkh@linuxfoundation.org>
Cc: Kay Sievers <kay@vrfy.org>
Cc: Stable Kernel <stable@kernel.org>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/klist.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/klist.c b/lib/klist.c index 0874e41609a6..a2741a7d9784 100644 --- a/lib/klist.c +++ b/lib/klist.c @@ -278,13 +278,19 @@ EXPORT_SYMBOL_GPL(klist_node_attached); * Similar to klist_iter_init(), but starts the action off with @n, * instead of with the list head. */ -void klist_iter_init_node(struct klist *k, struct klist_iter *i, - struct klist_node *n) +int klist_iter_init_node(struct klist *k, struct klist_iter *i, + struct klist_node *n) { + if (n) { + kref_get(&n->n_ref); + if (!n->n_klist) { + kref_put(&n->n_ref); + return -ENODEV; + } + } i->i_klist = k; i->i_cur = n; - if (n) - kref_get(&n->n_ref); + return 0; } EXPORT_SYMBOL_GPL(klist_iter_init_node); |