linux-kernel - [PATCH 6/9] firewire: ohci: allocate isoc context header by kvmalloc()

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260117142823.440811-7-o-takashi@sakamocchi.jp>
Date: Sat, 17 Jan 2026 23:28:19 +0900
From: Takashi Sakamoto <o-takashi@...amocchi.jp>
To: linux1394-devel@...ts.sourceforge.net
Cc: linux-kernel@...r.kernel.org,
	linux-sound@...r.kernel.org
Subject: [PATCH 6/9] firewire: ohci: allocate isoc context header by kvmalloc()

Isochronous packet handling now runs in a workqueue context, where page
faults is acceptable.

This commit replaces __get_free_page() with kvmalloc() when allocating the
isochronous context header buffer.

Signed-off-by: Takashi Sakamoto <o-takashi@...amocchi.jp>
---
 drivers/firewire/ohci.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 8bba70b65ad7..888c43940999 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -2958,7 +2958,7 @@ static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
 				int type, int channel, size_t header_size)
 {
 	struct fw_ohci *ohci = fw_ohci(card);
-	void *header __free(free_page) = NULL;
+	void *header __free(kvfree) = NULL;
 	struct iso_context *ctx;
 	descriptor_callback_t callback;
 	u64 *channels;
@@ -3016,7 +3016,7 @@ static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
 
 	if (type != FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) {
 		ctx->sc.header_length = 0;
-		header = (void *) __get_free_page(GFP_KERNEL);
+		header = kvmalloc(PAGE_SIZE, GFP_KERNEL);
 		if (!header) {
 			ret = -ENOMEM;
 			goto out;
@@ -3137,7 +3137,7 @@ static void ohci_free_iso_context(struct fw_iso_context *base)
 	context_release(&ctx->context);
 
 	if (base->type != FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL) {
-		free_page((unsigned long)ctx->sc.header);
+		kvfree(ctx->sc.header);
 		ctx->sc.header = NULL;
 	}
 
-- 
2.51.0