Patch "crypto: chcr - Check device is allocated before use" has been added to the 4.9-stable tree

Patch "crypto: chcr - Check device is allocated before use" has been added to the 4.9-stable tree

[gregkh]

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

    crypto: chcr - Check device is allocated before use

to the 4.9-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:
     crypto-chcr-check-device-is-allocated-before-use.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From f5f7bebc91ab378dea5aad5277c4d283e46472d9 Mon Sep 17 00:00:00 2001
From: Harsh Jain <harsh@chelsio.com>
Date: Tue, 24 Jan 2017 10:34:33 +0530
Subject: crypto: chcr - Check device is allocated before use

From: Harsh Jain <harsh@chelsio.com>

commit f5f7bebc91ab378dea5aad5277c4d283e46472d9 upstream.

Ensure dev is allocated for crypto uld context before using the device
for crypto operations.

Signed-off-by: Atul Gupta <atul.gupta@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/crypto/chelsio/chcr_core.c |   18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)

--- a/drivers/crypto/chelsio/chcr_core.c
+++ b/drivers/crypto/chelsio/chcr_core.c
@@ -51,6 +51,7 @@ static struct cxgb4_uld_info chcr_uld_in
 int assign_chcr_device(struct chcr_dev **dev)
 {
 	struct uld_ctx *u_ctx;
+	int ret = -ENXIO;
 
 	/*
 	 * Which device to use if multiple devices are available TODO
@@ -58,15 +59,14 @@ int assign_chcr_device(struct chcr_dev *
 	 * must go to the same device to maintain the ordering.
 	 */
 	mutex_lock(&dev_mutex); /* TODO ? */
-	u_ctx = list_first_entry(&uld_ctx_list, struct uld_ctx, entry);
-	if (!u_ctx) {
-		mutex_unlock(&dev_mutex);
-		return -ENXIO;
+	list_for_each_entry(u_ctx, &uld_ctx_list, entry)
+		if (u_ctx && u_ctx->dev) {
+			*dev = u_ctx->dev;
+			ret = 0;
+			break;
 	}
-
-	*dev = u_ctx->dev;
 	mutex_unlock(&dev_mutex);
-	return 0;
+	return ret;
 }
 
 static int chcr_dev_add(struct uld_ctx *u_ctx)
@@ -203,10 +203,8 @@ static int chcr_uld_state_change(void *h
 
 static int __init chcr_crypto_init(void)
 {
-	if (cxgb4_register_uld(CXGB4_ULD_CRYPTO, &chcr_uld_info)) {
+	if (cxgb4_register_uld(CXGB4_ULD_CRYPTO, &chcr_uld_info))
 		pr_err("ULD register fail: No chcr crypto support in cxgb4");
-		return -1;
-	}
 
 	return 0;
 }


Patches currently in stable-queue which might be from harsh@chelsio.com are

queue-4.9/crypto-chcr-check-device-is-allocated-before-use.patch
queue-4.9/crypto-algif_aead-fix-kernel-panic-on-list_del.patch