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/mtd/maps/Makefile | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 drivers/mtd/maps/Makefile (limited to 'drivers/mtd/maps/Makefile') diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile new file mode 100644 index 000000000..01745eca1 --- /dev/null +++ b/drivers/mtd/maps/Makefile @@ -0,0 +1,37 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# linux/drivers/maps/Makefile +# + +ifeq ($(CONFIG_MTD_COMPLEX_MAPPINGS),y) +obj-$(CONFIG_MTD) += map_funcs.o +endif + +# Chip mappings +obj-$(CONFIG_MTD_CFI_FLAGADM) += cfi_flagadm.o +obj-$(CONFIG_MTD_DC21285) += dc21285.o +obj-$(CONFIG_MTD_L440GX) += l440gx.o +obj-$(CONFIG_MTD_AMD76XROM) += amd76xrom.o +obj-$(CONFIG_MTD_ESB2ROM) += esb2rom.o +obj-$(CONFIG_MTD_ICHXROM) += ichxrom.o +obj-$(CONFIG_MTD_CK804XROM) += ck804xrom.o +obj-$(CONFIG_MTD_TSUNAMI) += tsunami_flash.o +obj-$(CONFIG_MTD_PXA2XX) += pxa2xx-flash.o +obj-$(CONFIG_MTD_PHYSMAP) += physmap.o +physmap-y := physmap-core.o +physmap-$(CONFIG_MTD_PHYSMAP_VERSATILE) += physmap-versatile.o +physmap-$(CONFIG_MTD_PHYSMAP_GEMINI) += physmap-gemini.o +physmap-$(CONFIG_MTD_PHYSMAP_IXP4XX) += physmap-ixp4xx.o +obj-$(CONFIG_MTD_PISMO) += pismo.o +obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o +obj-$(CONFIG_MTD_SA1100) += sa1100-flash.o +obj-$(CONFIG_MTD_SBC_GXX) += sbc_gxx.o +obj-$(CONFIG_MTD_SUN_UFLASH) += sun_uflash.o +obj-$(CONFIG_MTD_SCx200_DOCFLASH)+= scx200_docflash.o +obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o +obj-$(CONFIG_MTD_PCI) += pci.o +obj-$(CONFIG_MTD_UCLINUX) += uclinux.o +obj-$(CONFIG_MTD_SCB2_FLASH) += scb2_flash.o +obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o +obj-$(CONFIG_MTD_VMU) += vmu-flash.o +obj-$(CONFIG_MTD_LANTIQ) += lantiq-flash.o -- cgit v1.3.1