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Jiayuan Chen 79f0c39ae7 ktls, sockmap: Fix missing uncharge operation
When we specify apply_bytes, we divide the msg into multiple segments,
each with a length of 'send', and every time we send this part of the data
using tcp_bpf_sendmsg_redir(), we use sk_msg_return_zero() to uncharge the
memory of the specified 'send' size.

However, if the first segment of data fails to send, for example, the
peer's buffer is full, we need to release all of the msg. When releasing
the msg, we haven't uncharged the memory of the subsequent segments.

This modification does not make significant logical changes, but only
fills in the missing uncharge places.

This issue has existed all along, until it was exposed after we added the
apply test in test_sockmap:
commit 3448ad23b3 ("selftests/bpf: Add apply_bytes test to test_txmsg_redir_wait_sndmem in test_sockmap")

Fixes: d3b18ad31f ("tls: add bpf support to sk_msg handling")
Reported-by: Cong Wang <xiyou.wangcong@gmail.com>
Closes: https://lore.kernel.org/bpf/aAmIi0vlycHtbXeb@pop-os.localdomain/T/#t
Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Link: https://lore.kernel.org/r/20250425060015.6968-2-jiayuan.chen@linux.dev
2025-05-09 18:09:59 -07:00
arch bpf, riscv64: Skip redundant zext instruction after load-acquire 2025-05-09 10:05:27 -07:00
block block-6.15-20250424 2025-04-25 11:34:39 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: scomp - Fix off-by-one bug when calculating last page 2025-04-23 09:32:57 +08:00
Documentation Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf after rc4 2025-04-28 08:40:45 -07:00
drivers pci-v6.15-fixes-3 2025-04-26 13:02:36 -07:00
fs vfs-6.15-rc4.fixes 2025-04-25 15:57:21 -07:00
include bpf: Add support to retrieve ref_ctr_offset for uprobe perf link 2025-05-09 13:01:07 -07:00
init Kconfig: switch CONFIG_SYSFS_SYCALL default to n 2025-04-15 10:28:35 +02:00
io_uring io_uring: fix 'sync' handling of io_fallback_tw() 2025-04-24 10:32:43 -06:00
ipc treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
kernel bpf: Add support to retrieve ref_ctr_offset for uprobe perf link 2025-05-09 13:01:07 -07:00
lib hardening fixes for v6.15-rc3 2025-04-18 13:20:20 -07:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm/migrate: fix sleep in atomic for large folios and buffer heads 2025-04-22 18:16:08 +02:00
net ktls, sockmap: Fix missing uncharge operation 2025-05-09 18:09:59 -07:00
rust Driver core fixes for 6.15-rc4 2025-04-25 10:02:59 -07:00
samples samples/bpf: Fix compilation failure for samples/bpf on LoongArch Fedora 2025-04-25 09:32:02 -07:00
scripts scripts/bpf_doc.py: implement json output format 2025-05-09 11:31:23 -07:00
security Landlock fix for v6.15-rc4 2025-04-24 12:59:05 -07:00
sound ASoC: Fixes for v6.15 2025-04-11 15:51:19 +02:00
tools bpftool: Display ref_ctr_offset for uprobe link info 2025-05-09 13:01:08 -07:00
usr kbuild: hdrcheck: fix cross build with clang 2025-03-05 04:06:45 +09:00
virt ARM: 2025-04-08 13:47:55 -07:00
.clang-format clang-format: Update the ForEachMacros list for v6.15-rc1 2025-04-13 11:03:59 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-01-10 00:17:25 +01:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: Create intermediate vmlinux build with relocations preserved 2025-03-17 00:29:50 +09:00
.mailmap sound fixes for 6.15-rc3 2025-04-17 10:14:51 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: update SLAB ALLOCATOR maintainers 2025-04-17 20:10:06 -07:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS pci-v6.15-fixes-3 2025-04-26 13:02:36 -07:00
Makefile Linux 6.15-rc4 2025-04-27 15:19:23 -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.