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Jens Axboe e0ee967630 io_uring/kbuf: sanitize peek buffer setup
Harden the buffer peeking a bit, by adding a sanity check for it having
a valid size. Outside of that, arg->max_len is a size_t, though it's
only ever set to a 32-bit value (as it's governed by MAX_RW_COUNT).
Bump our needed check to a size_t so we know it fits. Finally, cap the
calculated needed iov value to the PEEK_MAX_IMPORT, which is the
maximum number of segments that should be peeked.

Fixes: 35c8711c8f ("io_uring/kbuf: add helpers for getting/peeking multiple buffers")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2024-08-21 07:16:38 -06:00
arch RISC-V Patches for the 6.11 Merge Window, Part 1 2024-07-20 09:11:27 -07:00
block SCSI misc on 20240718 2024-07-19 10:56:58 -07:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto crypto: testmgr - generate power-of-2 lengths more often 2024-07-13 11:50:28 +12:00
Documentation RISC-V Patches for the 6.11 Merge Window, Part 1 2024-07-20 09:11:27 -07:00
drivers RISC-V Patches for the 6.11 Merge Window, Part 1 2024-07-20 09:11:27 -07:00
fs for-6.11-tag 2024-07-19 14:34:52 -07:00
include io_uring: fix user_data field name in comment 2024-08-16 12:31:26 -06:00
init init/Kconfig: remove CONFIG_GCC_ASM_GOTO_OUTPUT_WORKAROUND 2024-07-18 10:33:14 -07:00
io_uring io_uring/kbuf: sanitize peek buffer setup 2024-08-21 07:16:38 -06:00
ipc slab updates for 6.11 2024-07-18 15:08:12 -07:00
kernel pci-v6.11-changes 2024-07-19 19:03:18 -07:00
lib Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm NFS Client Updates for Linux 6.11 2024-07-18 17:17:30 -07:00
net Notably this includes fixes for a s390 build breakage. 2024-07-19 14:58:12 -07:00
rust slab updates for 6.11 2024-07-18 15:08:12 -07:00
samples Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
scripts powerpc updates for 6.11 2024-07-19 21:00:33 -07:00
security This update includes the following changes: 2024-07-19 08:52:58 -07:00
sound Char/Misc and other driver changes for 6.11-rc1 2024-07-19 15:55:08 -07:00
tools RISC-V Patches for the 6.11 Merge Window, Part 1 2024-07-20 09:11:27 -07:00
usr kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
virt KVM fixes for 6.10 2024-06-21 08:03:55 -04:00
.clang-format Docs: Move clang-format from process/ to dev-tools/ 2024-06-26 16:36:00 -06:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap soc: dt updates for 6.11 2024-07-16 11:43:51 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING
CREDITS tracing: Update of MAINTAINERS and CREDITS file 2024-07-18 14:08:42 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS - added support for Realtek RTL9302C 2024-07-20 09:03:36 -07:00
Makefile asm-generic updates for 6.11 2024-07-16 12:09:03 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.