Patch "fm10k: Use smp_rmb rather than read_barrier_depends" has been added to the 3.18-stable tree

This is a note to let you know that I've just added the patch titled

fm10k: Use smp_rmb rather than read_barrier_depends

to the 3.18-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:
fm10k-use-smp_rmb-rather-than-read_barrier_depends.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Brian King <[email protected]>
Date: Fri, 17 Nov 2017 11:05:48 -0600
Subject: fm10k: Use smp_rmb rather than read_barrier_depends

From: Brian King <[email protected]>

commit 7b8edcc685b5e2c3c37aa13dc50a88e84a5bfef8 upstream.

The original issue being fixed in this patch was seen with the ixgbe driver, but the same issue exists with fm10k as well, as the code is very similar. read_barrier_depends is not sufficient to ensure loads following it are not speculatively loaded out of order by the CPU, which can result in stale data being loaded, causing potential system crashes.

---
 drivers/net/ethernet/intel/fm10k/fm10k_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

@@ -1218,7 +1218,7 @@ static bool fm10k_clean_tx_irq(struct fm
 			break;
 
 		/* prevent any other reads prior to eop_desc */
-		read_barrier_depends();
+		smp_rmb();
 
 		/* if DD is not set pending work has not been completed */
 		if (!(eop_desc->flags & FM10K_TXD_FLAG_DONE))

Patches currently in stable-queue which might be from [email protected] are

queue-3.18/i40evf-use-smp_rmb-rather-than-read_barrier_depends.patch queue-3.18/igb-use-smp_rmb-rather-than-read_barrier_depends.patch queue-3.18/ixgbevf-use-smp_rmb-rather-than-read_barrier_depends.patch queue-3.18/igbvf-use-smp_rmb-rather-than-read_barrier_depends.patch queue-3.18/fm10k-use-smp_rmb-rather-than-read_barrier_depends.patch queue-3.18/ixgbe-fix-skb-list-corruption-on-power-systems.patch queue-3.18/i40e-use-smp_rmb-rather-than-read_barrier_depends.patch