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 --- fs/fuse/Makefile | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 fs/fuse/Makefile (limited to 'fs/fuse/Makefile') diff --git a/fs/fuse/Makefile b/fs/fuse/Makefile new file mode 100644 index 000000000..245e67852 --- /dev/null +++ b/fs/fuse/Makefile @@ -0,0 +1,22 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the FUSE filesystem. +# + +# Needed for trace events +ccflags-y = -I$(src) + +obj-$(CONFIG_FUSE_FS) += fuse.o +obj-$(CONFIG_CUSE) += cuse.o +obj-$(CONFIG_VIRTIO_FS) += virtiofs.o + +fuse-y := trace.o # put trace.o first so we see ftrace errors sooner +fuse-y += dev.o dir.o file.o inode.o control.o xattr.o acl.o readdir.o ioctl.o req_timeout.o req.o +fuse-y += poll.o notify.o +fuse-y += iomode.o +fuse-$(CONFIG_FUSE_DAX) += dax.o +fuse-$(CONFIG_FUSE_PASSTHROUGH) += passthrough.o backing.o +fuse-$(CONFIG_SYSCTL) += sysctl.o +fuse-$(CONFIG_FUSE_IO_URING) += dev_uring.o + +virtiofs-y := virtio_fs.o -- cgit v1.3.1