FAILED: patch "[PATCH] i40e: fix validation of VF state in get resources" failed to apply to 5.15-stable tree

FAILED: patch "[PATCH] i40e: fix validation of VF state in get resources" failed to apply to 5.15-stable tree

[gregkh]

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 877b7e6ffc23766448236e8732254534c518ba42
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2025092911-washed-tubby-340f@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:



thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 877b7e6ffc23766448236e8732254534c518ba42 Mon Sep 17 00:00:00 2001
From: Lukasz Czapnik <lukasz.czapnik@intel.com>
Date: Wed, 13 Aug 2025 12:45:15 +0200
Subject: [PATCH] i40e: fix validation of VF state in get resources

VF state I40E_VF_STATE_ACTIVE is not the only state in which
VF is actually active so it should not be used to determine
if a VF is allowed to obtain resources.

Use I40E_VF_STATE_RESOURCES_LOADED that is set only in
i40e_vc_get_vf_resources_msg() and cleared during reset.

Fixes: 61125b8be85d ("i40e: Fix failed opcode appearing if handling messages from VF")
Cc: stable@vger.kernel.org
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index c85715f75435..5ef3dc43a8a0 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1464,6 +1464,7 @@ static void i40e_trigger_vf_reset(struct i40e_vf *vf, bool flr)
 	 * functions that may still be running at this point.
 	 */
 	clear_bit(I40E_VF_STATE_INIT, &vf->vf_states);
+	clear_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states);
 
 	/* In the case of a VFLR, the HW has already reset the VF and we
 	 * just need to clean up, so don't hit the VFRTRIG register.
@@ -2130,7 +2131,10 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 	size_t len = 0;
 	int ret;
 
-	if (!i40e_sync_vf_state(vf, I40E_VF_STATE_INIT)) {
+	i40e_sync_vf_state(vf, I40E_VF_STATE_INIT);
+
+	if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states) ||
+	    test_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states)) {
 		aq_ret = -EINVAL;
 		goto err;
 	}
@@ -2233,6 +2237,7 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 				vf->default_lan_addr.addr);
 	}
 	set_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states);
+	set_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states);
 
 err:
 	/* send the response back to the VF */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 5cf74f16f433..f558b45725c8 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -41,7 +41,8 @@ enum i40e_vf_states {
 	I40E_VF_STATE_MC_PROMISC,
 	I40E_VF_STATE_UC_PROMISC,
 	I40E_VF_STATE_PRE_ENABLE,
-	I40E_VF_STATE_RESETTING
+	I40E_VF_STATE_RESETTING,
+	I40E_VF_STATE_RESOURCES_LOADED,
 };
 
 /* VF capabilities */

[PATCH 5.15.y] i40e: fix validation of VF state in get resources

[Sasha Levin]

From: Lukasz Czapnik <lukasz.czapnik@intel.com>

[ Upstream commit 877b7e6ffc23766448236e8732254534c518ba42 ]

VF state I40E_VF_STATE_ACTIVE is not the only state in which
VF is actually active so it should not be used to determine
if a VF is allowed to obtain resources.

Use I40E_VF_STATE_RESOURCES_LOADED that is set only in
i40e_vc_get_vf_resources_msg() and cleared during reset.

Fixes: 61125b8be85d ("i40e: Fix failed opcode appearing if handling messages from VF")
Cc: stable@vger.kernel.org
Signed-off-by: Lukasz Czapnik <lukasz.czapnik@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
[ Adjust context ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 7 ++++++-
 drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h | 3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 7673ce2be1c02..a1547fdc147f4 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -1455,6 +1455,7 @@ static void i40e_trigger_vf_reset(struct i40e_vf *vf, bool flr)
 	 * functions that may still be running at this point.
 	 */
 	clear_bit(I40E_VF_STATE_INIT, &vf->vf_states);
+	clear_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states);
 
 	/* In the case of a VFLR, the HW has already reset the VF and we
 	 * just need to clean up, so don't hit the VFRTRIG register.
@@ -2121,7 +2122,10 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 	size_t len = 0;
 	int ret;
 
-	if (!i40e_sync_vf_state(vf, I40E_VF_STATE_INIT)) {
+	i40e_sync_vf_state(vf, I40E_VF_STATE_INIT);
+
+	if (!test_bit(I40E_VF_STATE_INIT, &vf->vf_states) ||
+	    test_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states)) {
 		aq_ret = I40E_ERR_PARAM;
 		goto err;
 	}
@@ -2224,6 +2228,7 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg)
 				vf->default_lan_addr.addr);
 	}
 	set_bit(I40E_VF_STATE_ACTIVE, &vf->vf_states);
+	set_bit(I40E_VF_STATE_RESOURCES_LOADED, &vf->vf_states);
 
 err:
 	/* send the response back to the VF */
diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
index 97e9c34d7c6cd..3b841fbaffa67 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.h
@@ -39,7 +39,8 @@ enum i40e_vf_states {
 	I40E_VF_STATE_MC_PROMISC,
 	I40E_VF_STATE_UC_PROMISC,
 	I40E_VF_STATE_PRE_ENABLE,
-	I40E_VF_STATE_RESETTING
+	I40E_VF_STATE_RESETTING,
+	I40E_VF_STATE_RESOURCES_LOADED,
 };
 
 /* VF capabilities */
-- 
2.51.0