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 --- rust/zerocopy/rustdoc/style.css | 56 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 rust/zerocopy/rustdoc/style.css (limited to 'rust/zerocopy/rustdoc') diff --git a/rust/zerocopy/rustdoc/style.css b/rust/zerocopy/rustdoc/style.css new file mode 100644 index 000000000..d2d55ad2e --- /dev/null +++ b/rust/zerocopy/rustdoc/style.css @@ -0,0 +1,56 @@ +/* SPDX-License-Identifier: (BSD-2-Clause OR Apache-2.0) OR MIT */ +/* +Copyright 2026 The Fuchsia Authors + +Licensed under a BSD-style license , Apache License, Version 2.0 +, or the MIT +license , at your option. +This file may not be copied, modified, or distributed except according to +those terms. +*/ + +.codegen-tabs { + display: grid; + grid-template-columns: repeat(var(--arity), minmax(200px, 1fr)); + grid-template-rows: auto 1fr; + column-gap: 1rem; +} + +.codegen-tabs:not(:has(> details[open]))::after { + grid-column: 1/-1; + content: 'Click one of the above headers to expand its contents.'; + font-style: italic; + font-size: small; + text-align: center; +} + +.codegen-tabs details { + display: grid; + grid-column: 1 / -1; + grid-row: 1 / span 2; + grid-template-columns: subgrid; + grid-template-rows: subgrid; +} + +.codegen-tabs summary { + display: grid; + grid-column: var(--n) / span 1; + grid-row: 1; + z-index: 1; + border-bottom: 2px solid var(--headings-border-bottom-color); + cursor: pointer; +} + +.codegen-tabs details[open] > summary { + background-color: var(--code-block-background-color); + border-bottom-color: var(--target-border-color); +} + +.codegen-tabs details::details-content { + grid-column: 1 / -1; + grid-row: 2; +} + +.codegen-tabs details:not([open])::details-content { + display: none; +} -- cgit v1.3.1