FAILED: patch "[PATCH] crypto: nx - fix bounce buffer leaks in" failed to apply to 6.12-stable tree

gregkh
2026-05-04T08:48:42Z

The patch below does not apply to the 6.12-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-6.12.y
git checkout FETCH_HEAD
git cherry-pick -x adb3faf2db1a66d0f015b44ac909a32dfc7f2f9c
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<stable@vger.kernel.org>' --in-reply-to '2026050439-baggie-overstep-db93@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

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

From adb3faf2db1a66d0f015b44ac909a32dfc7f2f9c Mon Sep 17 00:00:00 2001
From: Thorsten Blum <thorsten.blum@linux.dev>
Date: Wed, 11 Mar 2026 16:56:47 +0100
Subject: [PATCH] crypto: nx - fix bounce buffer leaks in
nx842_crypto_{alloc,free}_ctx

The bounce buffers are allocated with __get_free_pages() using
BOUNCE_BUFFER_ORDER (order 2 = 4 pages), but both the allocation error
path and nx842_crypto_free_ctx() release the buffers with free_page().
Use free_pages() with the matching order instead.

Fixes: ed70b479c2c0 ("crypto: nx - add hardware 842 crypto comp alg")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c
index b61f2545e165..661568ce47f0 100644
--- a/drivers/crypto/nx/nx-842.c
+++ b/drivers/crypto/nx/nx-842.c
@@ -116,8 +116,8 @@ void *nx842_crypto_alloc_ctx(struct nx842_driver *driver)
ctx->dbounce = (u8 *)__get_free_pages(GFP_KERNEL, BOUNCE_BUFFER_ORDER);
if (!ctx->wmem || !ctx->sbounce || !ctx->dbounce) {
kfree(ctx->wmem);
- free_page((unsigned long)ctx->sbounce);
- free_page((unsigned long)ctx->dbounce);
+ free_pages((unsigned long)ctx->sbounce, BOUNCE_BUFFER_ORDER);
+ free_pages((unsigned long)ctx->dbounce, BOUNCE_BUFFER_ORDER);
kfree(ctx);
return ERR_PTR(-ENOMEM);
}
@@ -131,8 +131,8 @@ void nx842_crypto_free_ctx(void *p)
struct nx842_crypto_ctx *ctx = p;

kfree(ctx->wmem);
- free_page((unsigned long)ctx->sbounce);
- free_page((unsigned long)ctx->dbounce);
+ free_pages((unsigned long)ctx->sbounce, BOUNCE_BUFFER_ORDER);
+ free_pages((unsigned long)ctx->dbounce, BOUNCE_BUFFER_ORDER);
}
EXPORT_SYMBOL_GPL(nx842_crypto_free_ctx);