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 --- include/dt-bindings/input/input.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 include/dt-bindings/input/input.h (limited to 'include/dt-bindings/input/input.h') diff --git a/include/dt-bindings/input/input.h b/include/dt-bindings/input/input.h new file mode 100644 index 000000000..bcf0ae100 --- /dev/null +++ b/include/dt-bindings/input/input.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * This header provides constants for most input bindings. + * + * Most input bindings include key code, matrix key code format. + * In most cases, key code and matrix key code format uses + * the standard values/macro defined in this header. + */ + +#ifndef _DT_BINDINGS_INPUT_INPUT_H +#define _DT_BINDINGS_INPUT_INPUT_H + +#include "linux-event-codes.h" + +#define MATRIX_KEY(row, col, code) \ + ((((row) & 0xFF) << 24) | (((col) & 0xFF) << 16) | ((code) & 0xFFFF)) + +#endif /* _DT_BINDINGS_INPUT_INPUT_H */ -- cgit v1.3.1