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Nikita Kiryushin 17c43211d4 rcu-tasks: Fix show_rcu_tasks_trace_gp_kthread buffer overflow
commit cc5645fddb0ce28492b15520306d092730dffa48 upstream.

There is a possibility of buffer overflow in
show_rcu_tasks_trace_gp_kthread() if counters, passed
to sprintf() are huge. Counter numbers, needed for this
are unrealistically high, but buffer overflow is still
possible.

Use snprintf() with buffer size instead of sprintf().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: edf3775f0a ("rcu-tasks: Add count for idle tasks on offline CPUs")
Signed-off-by: Nikita Kiryushin <kiryushin@ancud.ru>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Vamsi Krishna Brahmajosyula <vamsi-krishna.brahmajosyula@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-09-12 11:06:42 +02:00
arch KVM: arm64: Don't use cbz/adr with external symbols 2024-09-04 13:17:44 +02:00
block block: initialize integrity buffer to zero before writing it to media 2024-09-12 11:06:41 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:13:17 +02:00
crypto crypto: aead,cipher - zeroize key buffer after use 2024-07-18 13:05:38 +02:00
Documentation hwspinlock: Introduce hwspin_lock_bust() 2024-09-12 11:06:41 +02:00
drivers virtio_net: Fix napi_skb_cache_put warning 2024-09-12 11:06:42 +02:00
fs fsnotify: clear PARENT_WATCHED flags lazily 2024-09-12 11:06:41 +02:00
include bpf, cgroups: Fix cgroup v2 fallback on v1/v2 mixed mode 2024-09-12 11:06:42 +02:00
init init/main.c: Fix potential static_command_line memory overflow 2024-05-02 16:23:39 +02:00
io_uring io_uring/io-wq: limit retrying worker initialisation 2024-08-19 05:41:03 +02:00
ipc ipc: replace costly bailout check in sysvipc_find_ipc() 2024-09-04 13:17:44 +02:00
kernel rcu-tasks: Fix show_rcu_tasks_trace_gp_kthread buffer overflow 2024-09-12 11:06:42 +02:00
lib bitmap: introduce generic optimized bitmap_size() 2024-09-04 13:17:30 +02:00
LICENSES LICENSES/deprecated: add Zlib license text 2020-09-16 14:33:49 +02:00
mm memcg_write_event_control(): fix a user-triggerable oops 2024-09-04 13:17:30 +02:00
net net: set SOCK_RCU_FREE before inserting socket into hashtable 2024-09-12 11:06:42 +02:00
samples Add gitignore file for samples/fanotify/ subdirectory 2024-08-19 05:41:21 +02:00
scripts kbuild: Fix '-S -c' in x86 stack protector scripts 2024-08-19 05:40:59 +02:00
security smack: tcp: ipv4, fix incorrect labeling 2024-09-12 11:06:41 +02:00
sound ALSA: hda/conexant: Mute speakers at suspend / shutdown 2024-09-12 11:06:38 +02:00
tools tools: move alignment-related macros to new <linux/align.h> 2024-09-04 13:17:44 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:25:48 +01:00
virt KVM: Always flush async #PF workqueue when vCPU is being destroyed 2024-04-13 12:58:04 +02:00
.clang-format RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore kbuild: generate Module.symvers only when vmlinux exists 2021-05-19 10:12:59 +02:00
.mailmap mailmap: add two more addresses of Uwe Kleine-König 2020-12-06 10:19:07 -08:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Jason Cooper to CREDITS 2020-11-30 10:20:34 +01:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Remove DECnet support from kernel 2023-06-21 15:45:38 +02:00
Makefile Linux 5.10.225 2024-09-04 13:17:48 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -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 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.