Younes Akhouayri 5391b147d9 rust: dma: return zero for Coherent reads past EOF ...

Coherent<T>::write_to_slice() calculates a zero-byte copy when the file
offset is beyond the allocation, but still calls
UserSliceWriter::write_dma(). The latter rejects offsets beyond the
allocation even when the copy length is zero, so a debugfs read past EOF
returns -ERANGE.

Return before calling write_dma() when the offset is at or beyond the
allocation, matching simple_read_from_buffer() EOF semantics.

Fixes: 0168185139 ("rust: dma: implement BinaryWriter for Coherent<[u8]>")
Cc: stable@vger.kernel.org
Link: https://rust-for-linux.zulipchat.com/#narrow/channel/291566-Library/topic/.E2.9C.94.20Possible.20past-EOF.20bug.20in.20Coherent.3CT.3E.3A.3Awrite_to_slice/near/611677095
Signed-off-by: Younes Akhouayri <git@younes.io>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Onur Özkan <work@onurozkan.dev>
Link: https://patch.msgid.link/20260730-fix-dma-coherent-eof-v2-1-8aff21054afa@younes.io
Signed-off-by: Danilo Krummrich <dakr@kernel.org>

2026-08-03 22:48:03 +02:00

..

alloc

Merge tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core

2026-06-15 12:41:17 +05:30

block

rust: block: fix GenDisk cleanup paths

2026-05-31 19:45:06 -06:00

debugfs

rust: debugfs: remove unsafe blocks from traits impl for Vec

2026-07-31 11:08:29 +02:00

device

rust: device: replace kernel::c_str! with C-Strings

2025-12-22 17:30:24 +01:00

drm

rust/drm/gem: Use DeviceContext with GEM objects

2026-06-02 22:51:16 +02:00

fs

rust: fs: add file::Offset type alias

2025-11-05 00:05:38 +01:00

gpu

rust: gpu: Add GPU buddy allocator bindings

2026-03-23 21:41:47 +01:00

interop

rust: interop: Add list module for C linked list interface

2026-03-23 20:29:28 +01:00

io

rust: io: register: use path fragment for alias destination

2026-08-03 22:30:32 +02:00

iommu

rust: iommu: fix srctree link warning

2026-01-22 09:19:30 +01:00

irq

rust: irq: move 'static bounds to traits

2026-03-03 20:33:26 +01:00

list

Merge tag 'locking-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2026-04-14 12:36:25 -07:00

mm

mm: rename zap_page_range_single() to zap_vma_range()

2026-04-05 13:53:15 -07:00

net

rust: driver: remove $module_table_name from module_device_table

2026-07-30 22:50:15 +02:00

num

rust: make build_assert module the home of related macros

2026-06-10 09:07:13 +02:00

pci

Merge patch series "rust: I/O type generalization and projection"

2026-07-13 23:50:39 +02:00

ptr

rust: ptr: remove implicit index projection syntax

2026-06-05 10:16:47 +02:00

str

rust: str: add radix prefixed integer parsing functions

2025-11-03 14:40:45 +01:00

sync

Merge tag 'locking-core-2026-06-14' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip

2026-06-15 14:21:14 +05:30

time

hrtimer: add usage examples to documentation

2026-03-23 08:31:00 +01:00

types

rust: types: introduce ForLt base trait for CovariantForLt

2026-07-11 19:42:03 +02:00

.gitignore

rust: Add warn_on macro

2025-07-23 02:05:58 +02:00

acpi.rs

rust: driver: store pointers in DeviceId

2026-07-30 22:50:15 +02:00

alloc.rs

rust: alloc: cleanup imports and use "kernel vertical" style

2026-05-20 17:34:17 +02:00

auxiliary.rs

rust: driver: store pointers in DeviceId

2026-07-30 22:50:15 +02:00

bitfield.rs

rust: bitfield: mark Debug impl as #[inline]

2026-06-17 01:32:56 +02:00

bitmap.rs

rust: tests: add Kconfig for KUnit test

2026-06-08 02:30:33 +02:00

bits.rs

rust: bits: always inline functions using build_assert with arguments

2026-01-18 20:40:11 +01:00

block.rs

rust: block: add block related constants

2025-09-02 05:23:56 -06:00

bug.rs

rust: bug: Support DEBUG_BUGVERBOSE_DETAILED option

2026-01-30 05:18:17 +01:00

build_assert.rs

rust: make build_assert module the home of related macros

2026-06-10 09:07:13 +02:00

clk.rs

rust: clk: implement Send and Sync

2026-04-03 11:57:35 +02:00

configfs.rs

rust: configfs: replace kernel::c_str! with C-Strings

2026-01-15 09:26:49 +01:00

cpu.rs

rust: kernel: cpu: mark CpuId::current() inline

2025-09-14 23:58:45 +02:00

cpufreq.rs

Merge tag 'driver-core-7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/driver-core/driver-core

2026-06-15 12:41:17 +05:30

cpumask.rs

rust: cpumask: rename methods of Cpumask for clarity and consistency

2026-01-27 11:21:23 +05:30

cred.rs

Merge tag 'char-misc-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2025-10-04 16:26:32 -07:00

debugfs.rs

rust: debugfs: Use kernel Atomic type in docs example

2026-01-19 15:02:46 +01:00

device_id.rs

rust: driver: remove duplicate ID table

2026-07-30 22:50:15 +02:00

device.rs

rust: device: make lifetime on Core and CoreInternal invariant

2026-07-21 00:46:17 +02:00

devres.rs

rust: devres: use cast_pin_init instead of manual reimplementation

2026-07-27 22:29:34 +02:00

dma.rs

rust: dma: return zero for Coherent reads past EOF

2026-08-03 22:48:03 +02:00

driver.rs

rust: driver: remove open-coded matching logic

2026-07-30 22:50:15 +02:00

error.rs

rust: error: replace match + panic in const context with const expect

2026-05-28 11:08:27 +02:00

faux.rs

rust: faux: use "kernel vertical" style for imports

2026-01-07 19:56:00 +01:00

firmware.rs

rust: firmware: avoid UB in example by passing parameter

2026-07-17 15:44:44 +02:00

fmt.rs

rust: fmt: use vertical import style

2026-05-20 00:47:24 +02:00

fs.rs

rust: fs: add Kiocb struct

2025-09-06 13:27:20 +02:00

generated_arch_reachable_asm.rs.S

rust: Add warn_on macro

2025-07-23 02:05:58 +02:00

generated_arch_static_branch_asm.rs.S

…

generated_arch_warn_asm.rs.S

rust: Add warn_on macro

2025-07-23 02:05:58 +02:00

gpu.rs

rust: gpu: Add GPU buddy allocator bindings

2026-03-23 21:41:47 +01:00

i2c.rs

rust: driver: remove open-coded matching logic

2026-07-30 22:50:15 +02:00

id_pool.rs

rust: id_pool: do not immediately acquire new ids

2025-12-02 14:17:09 -05:00

impl_flags.rs

rust: add impl_flags! macro for defining common bitflag operations

2026-02-02 08:09:11 +01:00

init.rs

rust: inline some init methods

2026-06-09 04:13:21 +02:00

interop.rs

rust: interop: Add list module for C linked list interface

2026-03-23 20:29:28 +01:00

io.rs

rust: io: document const-offset requirement for infallible accessors

2026-07-21 00:48:25 +02:00

ioctl.rs

rust: make build_assert module the home of related macros

2026-06-10 09:07:13 +02:00

iov.rs

rust: iov: add iov_iter abstractions for ITER_DEST

2025-09-06 13:27:20 +02:00

irq.rs

rust: irq: fix C header path in module docs

2026-07-21 00:48:45 +02:00

jump_label.rs

…

Kconfig.test

rust: bitfield: Add KUnit tests for bitfield

2026-06-09 04:13:07 +02:00

kunit.rs

rust: tests: add Kconfig for KUnit test

2026-06-08 02:30:33 +02:00

lib.rs

rust: add basic serial device bus abstractions

2026-07-23 22:48:24 +02:00

list.rs

rust: list: hide macros from top-level kernel doc

2026-03-27 12:15:47 +01:00

maple_tree.rs

rust: maple_tree: rcu_read_lock() in destructor to silence lockdep

2025-12-23 11:23:15 -08:00

miscdevice.rs

rust: miscdevice: remove redundant imports

2026-05-23 13:47:32 +02:00

mm.rs

rust: mm: update ARef and AlwaysRefCounted imports from sync::aref

2025-09-13 16:55:15 -07:00

module_param.rs

rust: module_param: add missing newline to pr_warn_once

2026-06-04 16:42:34 +00:00

net.rs

…

num.rs

rust: num: add Bounded integer wrapping type

2025-11-19 00:22:24 +01:00

of.rs

rust: driver: store pointers in DeviceId

2026-07-30 22:50:15 +02:00

opp.rs

opp: rust: mark OPP methods as inline

2026-05-25 09:40:52 +05:30

page.rs

Merge tag 'mm-stable-2026-06-18-09-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-06-19 10:14:34 -07:00

pci.rs

rust: driver: store pointers in DeviceId

2026-07-30 22:50:15 +02:00

pid_namespace.rs

rust: pid_namespace: update AlwaysRefCounted imports from sync::aref

2025-08-19 13:08:41 +02:00

platform.rs

rust: driver: remove open-coded matching logic

2026-07-30 22:50:15 +02:00

prelude.rs

rust: prelude: add zerocopy{,_derive}::IntoBytes

2026-06-17 00:32:42 +02:00

print.rs

rust: print: Add pr_*_once macros

2026-01-30 05:47:05 +01:00

processor.rs

rust: Add cpu_relax() helper

2025-08-21 16:58:07 +02:00

ptr.rs

rust: io: add dynamically-sized Region type

2026-07-11 17:42:56 +02:00

pwm.rs

rust: pwm: Simplify to_result call sites and unsafe blocks

2026-01-20 18:49:58 +01:00

rbtree.rs

Merge tag 'rust-6.20-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux

2026-02-10 11:53:01 -08:00

regulator.rs

rust: regulator: do not assume that regulator_get() returns non-null

2026-03-24 13:08:21 +00:00

revocable.rs

Merge tag 'rust-6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux

2025-08-03 13:49:10 -07:00

safety.rs

rust: safety: introduce unsafe_precondition_assert! macro

2026-02-02 08:10:48 +01:00

scatterlist.rs

rust: scatterlist: Update ARef imports to use sync::aref

2025-12-18 17:25:45 +01:00

security.rs

rust_binder: add Rust Binder driver

2025-09-19 09:40:46 +02:00

seq_file.rs

rust: seq_file: replace kernel::c_str! with C-Strings

2026-01-29 15:32:40 +01:00

serdev.rs

rust: driver: remove open-coded matching logic

2026-07-30 22:50:15 +02:00

sizes.rs

rust: sizes: add SizeConstants trait for device address space constants

2026-04-07 12:57:50 +02:00

soc.rs

rust: Add soc_device support

2025-12-28 12:43:56 +01:00

std_vendor.rs

…

str.rs

rust: str: clean unused import for Rust >= 1.98

2026-06-10 09:07:13 +02:00

sync.rs

rust: sync: Replace kernel::c_str! with C-Strings

2026-01-28 09:25:44 +01:00

task.rs

Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2026-04-24 13:23:50 -07:00

time.rs

rust: time: make ClockSource unsafe trait

2026-03-23 08:29:48 +01:00

tracepoint.rs

…

transmute.rs

rust: transmute: simplify code with Rust 1.80.0 split_at_*checked()

2026-04-07 10:00:24 +02:00

types.rs

rust: types: introduce ForLt base trait for CovariantForLt

2026-07-11 19:42:03 +02:00

uaccess.rs

Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2026-04-24 13:23:50 -07:00

usb.rs

rust: driver: store pointers in DeviceId

2026-07-30 22:50:15 +02:00

workqueue.rs

rust: workqueue: use new sync::aref path for imports

2026-03-26 15:45:34 +00:00

xarray.rs

rust: make build_assert module the home of related macros

2026-06-10 09:07:13 +02:00