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From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Jerin Jacob <jerinj@marvell.com>,
	Kiran Kumar K <kirankumark@marvell.com>,
	Vamsi Attunuru <vattunuru@marvell.com>
Cc: Ferruh Yigit <ferruh.yigit@intel.com>, dev@dpdk.org, stable@dpdk.org
Subject: [dpdk-stable] [PATCH] kni: fix crash on userspace VA for segmented packets
Date: Tue, 22 Jun 2021 13:29:56 +0100
Message-ID: <20210622122956.3130231-1-ferruh.yigit@intel.com> (raw)

When IOVA=VA, address translation for segmented packets is wrong, it
assumes the address in the mbuf->next is physical address, not VA
address.

Fixing the address translation to work both PA & VA mode.

Fixes: e73831dc6c26 ("kni: support userspace VA")
Cc: stable@dpdk.org

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
Cc: vattunuru@marvell.com
---
 kernel/linux/kni/kni_net.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/linux/kni/kni_net.c b/kernel/linux/kni/kni_net.c
index f259327954b2..611719b5ee27 100644
--- a/kernel/linux/kni/kni_net.c
+++ b/kernel/linux/kni/kni_net.c
@@ -245,7 +245,7 @@ kni_fifo_trans_pa2va(struct kni_dev *kni,
 					break;
 
 				prev_kva = kva;
-				kva = pa2kva(kva->next);
+				kva = get_kva(kni, kva->next);
 				/* Convert physical address to virtual address */
 				prev_kva->next = pa2va(prev_kva->next, kva);
 			}
@@ -422,7 +422,7 @@ kni_net_rx_normal(struct kni_dev *kni)
 					break;
 
 				prev_kva = kva;
-				kva = pa2kva(kva->next);
+				kva = get_kva(kni, kva->next);
 				data_kva = kva2data_kva(kva);
 				/* Convert physical address to virtual address */
 				prev_kva->next = pa2va(prev_kva->next, kva);
@@ -501,7 +501,7 @@ kni_net_rx_lo_fifo(struct kni_dev *kni)
 			kni->va[i] = pa2va(kni->pa[i], kva);
 
 			while (kva->next) {
-				next_kva = pa2kva(kva->next);
+				next_kva = get_kva(kni, kva->next);
 				/* Convert physical address to virtual address */
 				kva->next = pa2va(kva->next, next_kva);
 				kva = next_kva;
-- 
2.31.1


             reply	other threads:[~2021-06-22 12:39 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-22 12:29 Ferruh Yigit [this message]
2021-06-24  1:57 ` [dpdk-stable] [dpdk-dev] " Ajit Khaparde
2021-06-24  7:48   ` Thomas Monjalon

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