From e873c74132f0c5f1452816cd9bb26208f0bba1e1 Mon Sep 17 00:00:00 2001 From: Shivank Garg Date: Sat, 22 Aug 2026 19:22:05 +0000 Subject: dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel() When dma_device_put() drops the last reference on chan->device->ref, dma_device_release() runs and may free the dma_device along with its channels. dma_chan_put() then still reads chan->device->owner via dma_chan_to_owner() for the trailing module_put(). KASAN catches it: slab-use-after-free in dma_chan_put+0x3e6/0x4c0 Read of size 8 by task insmod/6319 Freed by task 6319: kfree+0x225/0x470 dma_chan_put+0x395/0x4c0 dmaengine_put+0xf8/0x160 Cache the module owner in dma_chan_put() before the put so the trailing module_put() does not need chan->device. Fixes: 8ad342a86359 ("dmaengine: Add reference counting to dma_device struct") Suggested-by: Sashiko Link: https://sashiko.dev/#/patchset/20260518-dmaengine-kref-fix-v1-1-4d6125048fb7@amd.com Reviewed-by: Frank Li Reviewed-by: Logan Gunthorpe Signed-off-by: Shivank Garg Link: https://patch.msgid.link/20260822-dmaengine-kref-fix-v5-3-d4a4ee47d927@amd.com Signed-off-by: Vinod Koul --- drivers/rpmsg/Kconfig | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 drivers/rpmsg/Kconfig (limited to 'drivers/rpmsg/Kconfig') diff --git a/drivers/rpmsg/Kconfig b/drivers/rpmsg/Kconfig new file mode 100644 index 000000000..d3795860f --- /dev/null +++ b/drivers/rpmsg/Kconfig @@ -0,0 +1,84 @@ +# SPDX-License-Identifier: GPL-2.0 + +menu "Rpmsg drivers" + +# RPMSG always gets selected by whoever wants it +config RPMSG + tristate + +config RPMSG_CHAR + tristate "RPMSG device interface" + depends on RPMSG + depends on NET + help + Say Y here to export rpmsg endpoints as device files, usually found + in /dev. They make it possible for user-space programs to send and + receive rpmsg packets. + +config RPMSG_CTRL + tristate "RPMSG control interface" + depends on RPMSG && ( RPMSG_CHAR || RPMSG_CHAR=n ) + help + Say Y here to enable the support of the /dev/rpmsg_ctrlX API. This API + allows user-space programs to create endpoints with specific service name, + source and destination addresses. + +config RPMSG_NS + tristate "RPMSG name service announcement" + depends on RPMSG + help + Say Y here to enable the support of the name service announcement + channel that probes the associated RPMsg device on remote endpoint + service announcement. + +config RPMSG_MTK_SCP + tristate "MediaTek SCP" + depends on MTK_SCP + select RPMSG + help + Say y here to enable support providing communication channels to + remote processors in MediaTek platforms. + This use IPI and IPC to communicate with remote processors. + +config RPMSG_QCOM_GLINK + tristate + select RPMSG + +config RPMSG_QCOM_GLINK_RPM + tristate "Qualcomm RPM Glink driver" + select RPMSG_QCOM_GLINK + depends on HAS_IOMEM + depends on MAILBOX + help + Say y here to enable support for the GLINK RPM communication driver, + which serves as a channel for communication with the RPM in GLINK + enabled systems. + +config RPMSG_QCOM_GLINK_SMEM + tristate "Qualcomm SMEM Glink driver" + select RPMSG_QCOM_GLINK + depends on MAILBOX + depends on QCOM_SMEM + help + Say y here to enable support for the GLINK SMEM communication driver, + which provides support for using the GLINK communication protocol + over SMEM. + +config RPMSG_QCOM_SMD + tristate "Qualcomm Shared Memory Driver (SMD)" + depends on MAILBOX + depends on QCOM_SMEM + select RPMSG + help + Say y here to enable support for the Qualcomm Shared Memory Driver + providing communication channels to remote processors in Qualcomm + platforms. + +config RPMSG_VIRTIO + tristate "Virtio RPMSG bus driver" + depends on HAS_DMA + select RPMSG + select RPMSG_NS + select VIRTIO + +endmenu -- cgit v1.3.1