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Martin KaFai Lau 55d49f750b bpf: bpf_sk_storage: Fix the missing uncharge in sk_omem_alloc 
The commit c83597fa5d ("bpf: Refactor some inode/task/sk storage functions
for reuse"), refactored the bpf_{sk,task,inode}_storage_free() into
bpf_local_storage_unlink_nolock() which then later renamed to
bpf_local_storage_destroy(). The commit accidentally passed the
"bool uncharge_mem = false" argument to bpf_selem_unlink_storage_nolock()
which then stopped the uncharge from happening to the sk->sk_omem_alloc.

This missing uncharge only happens when the sk is going away (during
__sk_destruct).

This patch fixes it by always passing "uncharge_mem = true". It is a
noop to the task/inode/cgroup storage because they do not have the
map_local_storage_(un)charge enabled in the map_ops. A followup patch
will be done in bpf-next to remove the uncharge_mem argument.

A selftest is added in the next patch.

Fixes: c83597fa5d ("bpf: Refactor some inode/task/sk storage functions for reuse")
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20230901231129.578493-3-martin.lau@linux.dev
2023-09-06 11:08:14 +02:00
arch s390/bpf: Pass through tail call counter in trampolines 2023-09-06 10:48:14 +02:00
block v6.6-vfs.super 2023-08-28 11:04:18 -07:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto This update includes the following changes: 2023-08-29 11:23:29 -07:00
Documentation docs/bpf: Fix "file doesn't exist" warnings in {llvm_reloc,btf}.rst 2023-09-01 15:56:48 +02:00
drivers sfc: check for zero length in EF10 RX prefix 2023-09-01 08:14:57 +01:00
fs pstore updates for v6.6-rc1 2023-08-28 12:36:04 -07:00
include ipv6: ignore dst hint for multipath routes 2023-09-01 08:11:51 +01:00
init Scheduler changes for v6.6: 2023-08-28 16:43:39 -07:00
io_uring New code for 6.6: 2023-08-28 11:59:52 -07:00
ipc mqueue: convert to ctime accessor functions 2023-07-24 10:30:07 +02:00
kernel bpf: bpf_sk_storage: Fix the missing uncharge in sk_omem_alloc 2023-09-06 11:08:14 +02:00
lib Networking changes for 6.6. 2023-08-29 11:33:01 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm Networking changes for 6.6. 2023-08-29 11:33:01 -07:00
net bpf, sockmap: Fix skb refcnt race after locking changes 2023-09-04 09:53:35 +02:00
rust Rust changes for v6.6 2023-08-29 08:19:46 -07:00
samples Networking changes for 6.6. 2023-08-29 11:33:01 -07:00
scripts bpf, docs: Fix invalid escape sequence warnings in bpf_doc.py 2023-08-31 13:56:31 +02:00
security Networking changes for 6.6. 2023-08-29 11:33:01 -07:00
sound regmap: Updates for v6.6 2023-08-29 09:26:04 -07:00
tools selftests/bpf: Fix a CI failure caused by vsock write 2023-09-01 10:56:00 +02:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt KVM: Grab a reference to KVM for VM and vCPU stats file descriptors 2023-07-29 11:05:28 -04:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore Revert ".gitignore: ignore *.cover and *.mbx" 2023-07-04 15:05:12 -07:00
.mailmap mailmap: add entries for Simon Horman 2023-08-16 09:53:10 +01:00
.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 - Address -Wmissing-prototype warnings 2023-06-26 16:43:54 -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 Networking changes for 6.6. 2023-08-29 11:33:01 -07:00
Makefile Rust changes for v6.6 2023-08-29 08:19:46 -07:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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 Restructured Text 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.