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/tty/Makefile | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 drivers/tty/Makefile (limited to 'drivers/tty/Makefile') diff --git a/drivers/tty/Makefile b/drivers/tty/Makefile new file mode 100644 index 000000000..c6a063a54 --- /dev/null +++ b/drivers/tty/Makefile @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_TTY) += tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o \ + tty_buffer.o tty_port.o tty_mutex.o \ + tty_ldsem.o tty_baudrate.o tty_jobctrl.o \ + n_null.o +obj-$(CONFIG_LEGACY_PTYS) += pty.o +obj-$(CONFIG_UNIX98_PTYS) += pty.o +obj-$(CONFIG_AUDIT) += tty_audit.o +obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o +obj-$(CONFIG_N_HDLC) += n_hdlc.o +obj-$(CONFIG_N_GSM) += n_gsm.o + +obj-y += vt/ +obj-$(CONFIG_HVC_DRIVER) += hvc/ +obj-y += serial/ +obj-$(CONFIG_SERIAL_DEV_BUS) += serdev/ + +# tty drivers +obj-$(CONFIG_AMIGA_BUILTIN_SERIAL) += amiserial.o +obj-$(CONFIG_MOXA_INTELLIO) += moxa.o +obj-$(CONFIG_MOXA_SMARTIO) += mxser.o +obj-$(CONFIG_NOZOMI) += nozomi.o +obj-$(CONFIG_NULL_TTY) += ttynull.o +obj-$(CONFIG_PPC_EPAPR_HV_BYTECHAN) += ehv_bytechan.o +obj-$(CONFIG_GOLDFISH_TTY) += goldfish.o +obj-$(CONFIG_MIPS_EJTAG_FDC_TTY) += mips_ejtag_fdc.o +obj-$(CONFIG_VCC) += vcc.o +obj-$(CONFIG_RPMSG_TTY) += rpmsg_tty.o -- cgit v1.3.1