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/sunrpc/Makefile | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 net/sunrpc/Makefile (limited to 'net/sunrpc/Makefile') diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile new file mode 100644 index 000000000..96727df3a --- /dev/null +++ b/net/sunrpc/Makefile @@ -0,0 +1,21 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Makefile for Linux kernel SUN RPC +# + + +obj-$(CONFIG_SUNRPC) += sunrpc.o +obj-$(CONFIG_SUNRPC_GSS) += auth_gss/ +obj-$(CONFIG_SUNRPC_XPRT_RDMA) += xprtrdma/ + +sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \ + auth.o auth_null.o auth_tls.o auth_unix.o \ + svc.o svcsock.o svcauth.o svcauth_unix.o \ + addr.o rpcb_clnt.o timer.o xdr.o \ + sunrpc_syms.o cache.o rpc_pipe.o sysfs.o \ + svc_xprt.o \ + xprtmultipath.o netlink.o +sunrpc-$(CONFIG_SUNRPC_DEBUG) += debugfs.o +sunrpc-$(CONFIG_SUNRPC_BACKCHANNEL) += backchannel_rqst.o +sunrpc-$(CONFIG_PROC_FS) += stats.o +sunrpc-$(CONFIG_SYSCTL) += sysctl.o -- cgit v1.3.1