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a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1716560033; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=1ENZk+YNrymrvrrD0I2MRl9n2PBLEnhCmMDbUSSQHsE=; b=hoCB6JU9XprYJdvuL8+l1iNbmT1ZYa1Rl5VRmYqZ0oS1KNS1EC1IJ8wJp1vSO/hvRptPz1 S8EAzBSwXldgUqjrxj2QsbMl+eH0jp4MpyO53psZ0R2dXFuWThK9150jb9vDZrOhzM900H y9pH3EfD64HQ1lTur4u3nsgb7GzEZmA= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1716560033; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=1ENZk+YNrymrvrrD0I2MRl9n2PBLEnhCmMDbUSSQHsE=; b=Au2a7eBmvLDVIBcZVVGbc+XGLHrRaIQIPCMaePnoTad5afSIwUqsgcrg/2VSin5J71GR9h PDXEX3hEV9NkHWBg== Date: Fri, 24 May 2024 16:13:53 +0200 From: Jiri Bohac To: Greg Kroah-Hartman Cc: cve@kernel.org, linux-kernel@vger.kernel.org, linux-cve-announce@vger.kernel.org, Eric Biederman , kexec@lists.infradead.org Subject: Re: CVE-2023-52823: kernel: kexec: copy user-array safely Message-ID: References: <2024052106-CVE-2023-52823-3d81@gregkh> <2024052420-clang-flatterer-366b@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: X-Spam-Flag: NO X-Spam-Score: -4.30 X-Spam-Level: X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-0.992]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_ZERO(0.00)[0]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; MISSING_XM_UA(0.00)[]; MID_RHS_MATCH_FROMTLD(0.00)[]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCPT_COUNT_FIVE(0.00)[6] On Fri, May 24, 2024 at 02:38:04PM +0200, Jiri Bohac wrote: > On Fri, May 24, 2024 at 12:15:47PM +0200, Greg Kroah-Hartman wrote: > > Nice, but then why was this commit worded this way? Now we check twice? > > Double safe? Should it be reverted? > > double safe's good; turning it into a CVE not so much :( > CVE-2023-52822, CVE-2023-52824 and CVE-2023-52820, originally from the same patch > series, seem to be the exact same case. Same thing: CVE-2023-52758 -- Jiri Bohac SUSE Labs, Prague, Czechia