FAILED: patch "[PATCH] crypto: omap-sham - fix crypto engine cleanup" failed to apply to 6.18-stable tree

FAILED: patch "[PATCH] crypto: omap-sham - fix crypto engine cleanup" failed to apply to 6.18-stable tree

[Sasha Levin]

The patch below does not apply to the 6.18-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-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x be51ea091c6563158531e8c74e040552fdb1e28c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '20261107050702-failed-6.18-be51ea091c65@kernel.org' --subject-prefix 'PATCH 6.18.y' 'HEAD^..'

Thanks,
Sasha

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

From be51ea091c6563158531e8c74e040552fdb1e28c Mon Sep 17 00:00:00 2001
From: Guangshuo Li <lgs201920130244@gmail.com>
Date: Sat, 12 Sep 2026 22:46:08 +0800
Subject: [PATCH] crypto: omap-sham - fix crypto engine cleanup

omap_sham_probe() allocates and starts a crypto engine, but the remove
path does not call the matching crypto_engine_exit(). The probe failure
path already performs this cleanup.

crypto_engine_alloc_init() creates a kthread worker for processing
requests. Without crypto_engine_exit() during driver removal, the
worker is left running after the device is removed.

Call crypto_engine_exit() after unregistering the algorithms and before
tearing down the remaining request handling resources. This stops the
engine and destroys its worker.

This issue was found by manual code inspection.

Fixes: 133c3d434d91 ("crypto: omap-sham - convert to use crypto engine")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/omap-sham.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 12d6dc68438a7..5e739415a0102 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -2129,6 +2129,7 @@ static void omap_sham_remove(struct platform_device *pdev)
 	list_del(&dd->list);
 	spin_unlock_bh(&sham.lock);
 	omap_sham_unregister_algs(dd->pdata);
+	crypto_engine_exit(dd->engine);
 	cancel_work_sync(&dd->done_task);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-- 
2.53.0

[PATCH 6.18.y 1/2] crypto: omap - add omap_sham_unregister_algs helper

[Sasha Levin]

From: Thorsten Blum <thorsten.blum@linux.dev>

[ Upstream commit c3494e6fbb35579a131de11369b658a59b1323e5 ]

Add a new helper omap_sham_unregister_algs() and replace two for loops
in omap_sham_probe() and omap_sham_remove(), which also ensure
->registered is reset to 0.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Stable-dep-of: be51ea091c65 ("crypto: omap-sham - fix crypto engine cleanup")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/omap-sham.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index ff8aac02994a4..7b3612d097700 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -2041,6 +2041,20 @@ static struct attribute *omap_sham_attrs[] = {
 };
 ATTRIBUTE_GROUPS(omap_sham);
 
+static void omap_sham_unregister_algs(const struct omap_sham_pdata *pdata)
+{
+	struct omap_sham_algs_info *alg_info;
+	int i;
+
+	for (i = pdata->algs_info_size - 1; i >= 0; i--) {
+		alg_info = &pdata->algs_info[i];
+
+		crypto_engine_unregister_ahashes(alg_info->algs_list,
+						 alg_info->registered);
+		alg_info->registered = 0;
+	}
+}
+
 static int omap_sham_probe(struct platform_device *pdev)
 {
 	struct omap_sham_dev *dd;
@@ -2158,10 +2172,7 @@ static int omap_sham_probe(struct platform_device *pdev)
 	return 0;
 
 err_algs:
-	for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
-		for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
-			crypto_engine_unregister_ahash(
-					&dd->pdata->algs_info[i].algs_list[j]);
+	omap_sham_unregister_algs(dd->pdata);
 err_engine_start:
 	crypto_engine_exit(dd->engine);
 err_engine:
@@ -2182,19 +2193,13 @@ static int omap_sham_probe(struct platform_device *pdev)
 static void omap_sham_remove(struct platform_device *pdev)
 {
 	struct omap_sham_dev *dd;
-	int i, j;
 
 	dd = platform_get_drvdata(pdev);
 
 	spin_lock_bh(&sham.lock);
 	list_del(&dd->list);
 	spin_unlock_bh(&sham.lock);
-	for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
-		for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) {
-			crypto_engine_unregister_ahash(
-					&dd->pdata->algs_info[i].algs_list[j]);
-			dd->pdata->algs_info[i].registered--;
-		}
+	omap_sham_unregister_algs(dd->pdata);
 	cancel_work_sync(&dd->done_task);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-- 
2.53.0

[PATCH 6.18.y 2/2] crypto: omap-sham - fix crypto engine cleanup

[Sasha Levin]

From: Guangshuo Li <lgs201920130244@gmail.com>

[ Upstream commit be51ea091c6563158531e8c74e040552fdb1e28c ]

omap_sham_probe() allocates and starts a crypto engine, but the remove
path does not call the matching crypto_engine_exit(). The probe failure
path already performs this cleanup.

crypto_engine_alloc_init() creates a kthread worker for processing
requests. Without crypto_engine_exit() during driver removal, the
worker is left running after the device is removed.

Call crypto_engine_exit() after unregistering the algorithms and before
tearing down the remaining request handling resources. This stops the
engine and destroys its worker.

This issue was found by manual code inspection.

Fixes: 133c3d434d91 ("crypto: omap-sham - convert to use crypto engine")
Cc: stable@vger.kernel.org
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/omap-sham.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/crypto/omap-sham.c b/drivers/crypto/omap-sham.c
index 7b3612d097700..2cda2e05ab42c 100644
--- a/drivers/crypto/omap-sham.c
+++ b/drivers/crypto/omap-sham.c
@@ -2200,6 +2200,7 @@ static void omap_sham_remove(struct platform_device *pdev)
 	list_del(&dd->list);
 	spin_unlock_bh(&sham.lock);
 	omap_sham_unregister_algs(dd->pdata);
+	crypto_engine_exit(dd->engine);
 	cancel_work_sync(&dd->done_task);
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-- 
2.53.0