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Tue, 5 Mar 2024 16:54:45 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id fIEJNFVO52XYBgAAD6G6ig (envelope-from ); Tue, 05 Mar 2024 16:54:45 +0000 Date: Tue, 5 Mar 2024 17:54:45 +0100 From: Michal Hocko To: cve@kernel.org, linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman Subject: Re: CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race Message-ID: References: <2024030253-CVE-2023-52521-d847@gregkh> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2024030253-CVE-2023-52521-d847@gregkh> Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.com header.s=susede1 header.b=uG38+eLu X-Spamd-Result: default: False [-3.52 / 50.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; DWL_DNSWL_LOW(-1.00)[suse.com:dkim]; RCVD_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; DKIM_TRACE(0.00)[suse.com:+]; MX_GOOD(-0.01)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:dkim]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; MID_RHS_NOT_FQDN(0.50)[]; RCVD_TLS_ALL(0.00)[]; BAYES_HAM(-2.71)[98.74%] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: DC6EF6B9AD X-Spam-Level: X-Spam-Score: -3.52 X-Spam-Flag: NO On Sat 02-03-24 22:53:05, Greg KH wrote: > Description > =========== > > In the Linux kernel, the following vulnerability has been resolved: > > bpf: Annotate bpf_long_memcpy with data_race > > syzbot reported a data race splat between two processes trying to > update the same BPF map value via syscall on different CPUs: > > BUG: KCSAN: data-race in bpf_percpu_array_update / bpf_percpu_array_update I would like to dispute this CVE. It adds data_race annotation which doesn't have any impact on the code generation. -- Michal Hocko SUSE Labs