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 --- io_uring/Makefile | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 io_uring/Makefile (limited to 'io_uring/Makefile') diff --git a/io_uring/Makefile b/io_uring/Makefile new file mode 100644 index 000000000..c54e328d1 --- /dev/null +++ b/io_uring/Makefile @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for io_uring + +ifdef CONFIG_GCOV_PROFILE_URING +GCOV_PROFILE := y +endif + +obj-$(CONFIG_IO_URING) += io_uring.o opdef.o kbuf.o rsrc.o notif.o \ + tctx.o filetable.o rw.o poll.o \ + tw.o wait.o eventfd.o uring_cmd.o \ + openclose.o sqpoll.o xattr.o nop.o \ + fs.o splice.o sync.o msg_ring.o \ + advise.o openclose.o statx.o timeout.o \ + cancel.o waitid.o register.o \ + truncate.o memmap.o alloc_cache.o \ + query.o loop.o + +obj-$(CONFIG_IO_URING_ZCRX) += zcrx.o +obj-$(CONFIG_IO_WQ) += io-wq.o +obj-$(CONFIG_FUTEX) += futex.o +obj-$(CONFIG_EPOLL) += epoll.o +obj-$(CONFIG_NET_RX_BUSY_POLL) += napi.o +obj-$(CONFIG_NET) += net.o cmd_net.o +obj-$(CONFIG_PROC_FS) += fdinfo.o +obj-$(CONFIG_IO_URING_MOCK_FILE) += mock_file.o +obj-$(CONFIG_IO_URING_BPF) += bpf_filter.o +obj-$(CONFIG_IO_URING_BPF_OPS) += bpf-ops.o -- cgit v1.3.1