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 --- net/bluetooth/Makefile | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 net/bluetooth/Makefile (limited to 'net/bluetooth/Makefile') diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile new file mode 100644 index 000000000..ff466ea97 --- /dev/null +++ b/net/bluetooth/Makefile @@ -0,0 +1,29 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for the Linux Bluetooth subsystem. +# + +obj-$(CONFIG_BT) += bluetooth.o +obj-$(CONFIG_BT_RFCOMM) += rfcomm/ +obj-$(CONFIG_BT_BNEP) += bnep/ +obj-$(CONFIG_BT_HIDP) += hidp/ +obj-$(CONFIG_BT_6LOWPAN) += bluetooth_6lowpan.o + +bluetooth_6lowpan-y := 6lowpan.o + +bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \ + hci_sock.o hci_sysfs.o l2cap_core.o l2cap_sock.o smp.o lib.o \ + ecdh_helper.o mgmt_util.o mgmt_config.o hci_codec.o eir.o hci_sync.o \ + hci_drv.o + +bluetooth-$(CONFIG_DEV_COREDUMP) += coredump.o + +bluetooth-$(CONFIG_BT_BREDR) += sco.o +bluetooth-$(CONFIG_BT_LE) += iso.o +bluetooth-$(CONFIG_BT_LEDS) += leds.o +bluetooth-$(CONFIG_BT_MSFTEXT) += msft.o +bluetooth-$(CONFIG_BT_AOSPEXT) += aosp.o +bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o +bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o + +CONTEXT_ANALYSIS := y -- cgit v1.3.1