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| author | Alexander Usyskin | 2016-04-17 18:16:03 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2016-04-30 23:08:08 +0200 |
| commit | 6a8d648c8d1824117a9e9edb948ed1611fb013c0 (patch) | |
| tree | d0db8401ceee131be91539da604aa9a5af9a6176 /drivers/misc/mei/client.c | |
| parent | mei: drop global me_client_index (diff) | |
| download | kernel-qcow2-linux-6a8d648c8d1824117a9e9edb948ed1611fb013c0.tar.gz kernel-qcow2-linux-6a8d648c8d1824117a9e9edb948ed1611fb013c0.tar.xz kernel-qcow2-linux-6a8d648c8d1824117a9e9edb948ed1611fb013c0.zip | |
mei: fix NULL dereferencing during FW initiated disconnection
In the case when disconnection is initiated from the FW
the driver is flushing items from the write control list while
iterating over it:
mei_irq_write_handler()
list_for_each_entry_safe(ctrl_wr_list) <-- outer loop
mei_cl_irq_disconnect_rsp()
mei_cl_set_disconnected()
mei_io_list_flush(ctrl_wr_list) <-- destorying list
We move the list flushing to the completion routine.
Cc: <stable@vger.kernel.org> #4.2+
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/mei/client.c')
| -rw-r--r-- | drivers/misc/mei/client.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index bab17e4197b6..09f5280fa021 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -1767,6 +1767,10 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb) wake_up(&cl->wait); break; + case MEI_FOP_DISCONNECT_RSP: + mei_io_cb_free(cb); + mei_cl_set_disconnected(cl); + break; default: BUG_ON(0); } |