This is a note to let you know that I've just added the patch titled
sfc: check for NULL efx->ptp_data in efx_ptp_event
to the 3.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sfc-check-for-null-efx-ptp_data-in-efx_ptp_event.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Mar 19 23:31:33 Local time zone must be set--see zic manual page 2014
From: Edward Cree <ecree@xxxxxxxxxxxxxx>
Date: Tue, 25 Feb 2014 13:17:59 +0000
Subject: sfc: check for NULL efx->ptp_data in efx_ptp_event
From: Edward Cree <ecree@xxxxxxxxxxxxxx>
[ Upstream commit 8f355e5cee63c2c0c145d8206c4245d0189f47ff ]
If we receive a PTP event from the NIC when we haven't set up PTP state
in the driver, we attempt to read through a NULL pointer efx->ptp_data,
triggering a panic.
Signed-off-by: Edward Cree <ecree@xxxxxxxxxxxxxx>
Acked-by: Shradha Shah <sshah@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/sfc/ptp.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -1360,6 +1360,13 @@ void efx_ptp_event(struct efx_nic *efx,
struct efx_ptp_data *ptp = efx->ptp_data;
int code = EFX_QWORD_FIELD(*ev, MCDI_EVENT_CODE);
+ if (!ptp) {
+ if (net_ratelimit())
+ netif_warn(efx, drv, efx->net_dev,
+ "Received PTP event but PTP not set up\n");
+ return;
+ }
+
if (!ptp->enabled)
return;
Patches currently in stable-queue which might be from ecree@xxxxxxxxxxxxxx are
queue-3.13/sfc-check-for-null-efx-ptp_data-in-efx_ptp_event.patch
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