This is a note to let you know that I've just added the patch titled
hv_netvsc: Allocate memory in netvsc_dma_map() with GFP_ATOMIC
to the 6.1-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:
hv_netvsc-allocate-memory-in-netvsc_dma_map-with-gfp_atomic.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c6aa9d3b43cd11ac13a8220368a3b0483c6751d4 Mon Sep 17 00:00:00 2001
From: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Date: Mon, 6 Feb 2023 12:11:57 -0800
Subject: hv_netvsc: Allocate memory in netvsc_dma_map() with GFP_ATOMIC
From: Michael Kelley <mikelley@xxxxxxxxxxxxx>
commit c6aa9d3b43cd11ac13a8220368a3b0483c6751d4 upstream.
Memory allocations in the network transmit path must use GFP_ATOMIC
so they won't sleep.
Reported-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Link: https://lore.kernel.org/lkml/8a4d08f94d3e6fe8b6da68440eaa89a088ad84f9.camel@xxxxxxxxxx/
Fixes: 846da38de0e8 ("net: netvsc: Add Isolation VM support for netvsc driver")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/1675714317-48577-1-git-send-email-mikelley@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/hyperv/netvsc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index e02d1e3ef672..79f4e13620a4 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -1034,7 +1034,7 @@ static int netvsc_dma_map(struct hv_device *hv_dev,
packet->dma_range = kcalloc(page_count,
sizeof(*packet->dma_range),
- GFP_KERNEL);
+ GFP_ATOMIC);
if (!packet->dma_range)
return -ENOMEM;
--
2.39.1
Patches currently in stable-queue which might be from mikelley@xxxxxxxxxxxxx are
queue-6.1/hv_netvsc-allocate-memory-in-netvsc_dma_map-with-gfp_atomic.patch
