From: Marc Kleine-Budde <mkl@pengutronix.de>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, kuba@kernel.org, linux-can@vger.kernel.org,
kernel@pengutronix.de, Cunhao Lu <1579567540@qq.com>,
stable@vger.kernel.org, Marc Kleine-Budde <mkl@pengutronix.de>
Subject: [PATCH net 03/22] can: skb: make CAN skb allocation failure paths IRQ-safe
Date: Mon, 28 Sep 2026 20:45:10 +0200 [thread overview]
Message-ID: <20260928193312.553632-4-mkl@pengutronix.de> (raw)
In-Reply-To: <20260928193312.553632-1-mkl@pengutronix.de>
From: Cunhao Lu <1579567540@qq.com>
The CAN skb allocation helpers are used from hardware interrupt receive
handlers. If can_skb_ext_add() fails, they release the newly allocated skb
with kfree_skb(), which is not safe in hardware interrupt context.
Use dev_kfree_skb_any() for the allocation failure paths in
alloc_can_skb(), alloc_canfd_skb(), and alloc_canxl_skb().
Fixes: 96ea3a1e2d31 ("can: add CAN skb extension infrastructure")
Cc: stable@vger.kernel.org
Signed-off-by: Cunhao Lu <1579567540@qq.com>
Link: https://patch.msgid.link/tencent_C825C17D442F801351CE2FBC4984064B4605@qq.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
drivers/net/can/dev/skb.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/can/dev/skb.c b/drivers/net/can/dev/skb.c
index e0eac3678a77..d1f797d3778d 100644
--- a/drivers/net/can/dev/skb.c
+++ b/drivers/net/can/dev/skb.c
@@ -224,7 +224,7 @@ struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf)
csx = can_skb_ext_add(skb);
if (!csx) {
- kfree_skb(skb);
+ dev_kfree_skb_any(skb);
goto out_error_cc;
}
@@ -255,7 +255,7 @@ struct sk_buff *alloc_canfd_skb(struct net_device *dev,
csx = can_skb_ext_add(skb);
if (!csx) {
- kfree_skb(skb);
+ dev_kfree_skb_any(skb);
goto out_error_fd;
}
@@ -293,7 +293,7 @@ struct sk_buff *alloc_canxl_skb(struct net_device *dev,
csx = can_skb_ext_add(skb);
if (!csx) {
- kfree_skb(skb);
+ dev_kfree_skb_any(skb);
goto out_error_xl;
}
--
2.53.0
next prev parent reply other threads:[~2026-09-28 19:33 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-28 18:45 [PATCH net 0/22] pull-request: can 2026-09-28 Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 01/22] can: dev: can_dropped_invalid_skb: drop CAN XL frames on non-CAN XL devices Marc Kleine-Budde
2026-09-28 19:36 ` netdev-bot+sinfo
2026-09-28 18:45 ` [PATCH net 02/22] can: skb: make echo skb freeing safe in any IRQ context Marc Kleine-Budde
2026-09-28 18:45 ` Marc Kleine-Budde [this message]
2026-09-28 18:45 ` [PATCH net 04/22] can: dev: can_put_echo_skb(): free skb on invalid echo index Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 05/22] can: dev: init_can_skb(): restore skb header initialization Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 06/22] can: j1939: j1939_sk_bind(): fix j1939_ecu leak when re-bind failed Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 07/22] can: isotp: check the frame type, not just the length Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 08/22] can: cc770: platform_get_irq(): propagate the error Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 09/22] can: cc770: fix the clock divider check on the platform bus Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 10/22] can: kvaser_pciefd: fix use-after-free in bec poll timer Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 11/22] can: m_can: pci: add missing pm_runtime_dont_use_autosuspend() call Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 12/22] can: m_can: m_can_class_suspend(): fix suspend deinit() error path Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 13/22] can: sun4i_can: sun4ican_probe(): fix clk leak Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 14/22] can: xilinx_can: set CAN FD flags on received frames Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 15/22] can: mcp251xfd: mcp251xfd_probe(): reject devices without match data Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 16/22] can: hi311x: drop hi3110_lock before free_irq() on open failure Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 17/22] can: ems_usb: use usb_kill_urb() to stop the intr URB Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 18/22] usb: f81604: fix struct f81604_int_data size mismatch Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 19/22] can: gs_usb: kill RX URBs before destroying the netdevs Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 20/22] can: gs_usb: add workarounds for HScanT USB to CAN adapter Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 21/22] can: kvaser_usb: validate command format before parsing in hydra receive path Marc Kleine-Budde
2026-09-28 18:45 ` [PATCH net 22/22] can: peak_usb: fix missing CAN_ERR_FLAG when reporting error counters Marc Kleine-Budde
2026-09-29 1:09 ` [PATCH net 0/22] pull-request: can 2026-09-28 Jakub Kicinski
2026-09-29 21:12 ` Marc Kleine-Budde
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