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hv_netvsc: Allocate memory in netvsc_dma_map() with GFP_ATOMIC
author
Michael Kelley
<mikelley@microsoft.com>
Mon, 6 Feb 2023 20:11:57 +0000
(12:11 -0800)
committer
Greg Kroah-Hartman
<gregkh@linuxfoundation.org>
Tue, 14 Feb 2023 18:11:40 +0000
(19:11 +0100)
commit
c6aa9d3b43cd11ac13a8220368a3b0483c6751d4
upstream.
Memory allocations in the network transmit path must use GFP_ATOMIC
so they won't sleep.
Reported-by: Paolo Abeni <pabeni@redhat.com>
Link:
https://lore.kernel.org/lkml/8a4d08f94d3e6fe8b6da68440eaa89a088ad84f9.camel@redhat.com/
Fixes:
846da38de0e8
("net: netvsc: Add Isolation VM support for netvsc driver")
Cc: stable@vger.kernel.org
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link:
https://lore.kernel.org/r/1675714317-48577-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/net/hyperv/netvsc.c
patch
|
blob
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diff --git
a/drivers/net/hyperv/netvsc.c
b/drivers/net/hyperv/netvsc.c
index
e02d1e3
..
79f4e13
100644
(file)
--- 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;