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Thu, 20 Jun 2024 07:55:06 +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 C1kFJ1rgc2ZTVgAAD6G6ig (envelope-from ); Thu, 20 Jun 2024 07:55:06 +0000 Message-ID: Date: Thu, 20 Jun 2024 09:55:06 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: CVE-2021-47575: xen/console: harden hvc_xen against event channel storms To: cve@kernel.org, linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , "security@xenproject.org" References: <2024061914-CVE-2021-47575-a011@gregkh> Content-Language: en-US From: Juergen Gross Autocrypt: addr=jgross@suse.com; keydata= xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOB ycWxw3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJve dYm8Of8Zd621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJ NwQpd369y9bfIhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvx XP3FAp2pkW0xqG7/377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEB AAHNH0p1ZXJnZW4gR3Jvc3MgPGpncm9zc0BzdXNlLmNvbT7CwHkEEwECACMFAlOMcK8CGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRCw3p3WKL8TL8eZB/9G0juS/kDY9LhEXseh mE9U+iA1VsLhgDqVbsOtZ/S14LRFHczNd/Lqkn7souCSoyWsBs3/wO+OjPvxf7m+Ef+sMtr0 G5lCWEWa9wa0IXx5HRPW/ScL+e4AVUbL7rurYMfwCzco+7TfjhMEOkC+va5gzi1KrErgNRHH kg3PhlnRY0Udyqx++UYkAsN4TQuEhNN32MvN0Np3WlBJOgKcuXpIElmMM5f1BBzJSKBkW0Jc Wy3h2Wy912vHKpPV/Xv7ZwVJ27v7KcuZcErtptDevAljxJtE7aJG6WiBzm+v9EswyWxwMCIO RoVBYuiocc51872tRGywc03xaQydB+9R7BHPzsBNBFOMcBYBCADLMfoA44MwGOB9YT1V4KCy vAfd7E0BTfaAurbG+Olacciz3yd09QOmejFZC6AnoykydyvTFLAWYcSCdISMr88COmmCbJzn sHAogjexXiif6ANUUlHpjxlHCCcELmZUzomNDnEOTxZFeWMTFF9Rf2k2F0Tl4E5kmsNGgtSa aMO0rNZoOEiD/7UfPP3dfh8JCQ1VtUUsQtT1sxos8Eb/HmriJhnaTZ7Hp3jtgTVkV0ybpgFg w6WMaRkrBh17mV0z2ajjmabB7SJxcouSkR0hcpNl4oM74d2/VqoW4BxxxOD1FcNCObCELfIS auZx+XT6s+CE7Qi/c44ibBMR7hyjdzWbABEBAAHCwF8EGAECAAkFAlOMcBYCGwwACgkQsN6d 1ii/Ey9D+Af/WFr3q+bg/8v5tCknCtn92d5lyYTBNt7xgWzDZX8G6/pngzKyWfedArllp0Pn fgIXtMNV+3t8Li1Tg843EXkP7+2+CQ98MB8XvvPLYAfW8nNDV85TyVgWlldNcgdv7nn1Sq8g HwB2BHdIAkYce3hEoDQXt/mKlgEGsLpzJcnLKimtPXQQy9TxUaLBe9PInPd+Ohix0XOlY+Uk QFEx50Ki3rSDl2Zt2tnkNYKUCvTJq7jvOlaPd6d/W0tZqpyy7KVay+K4aMobDsodB3dvEAs6 ScCnh03dDAFgIq5nsB11j3KPKdVoPlfucX2c7kGNH+LUMbzqV6beIENfNexkOfxHfw== In-Reply-To: <2024061914-CVE-2021-47575-a011@gregkh> Content-Type: multipart/signed; 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MID_RHS_MATCH_FROM(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; RCVD_VIA_SMTP_AUTH(0.00)[]; DKIM_TRACE(0.00)[suse.com:+]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:dkim] X-Rspamd-Action: no action X-Rspamd-Server: rspamd1.dmz-prg2.suse.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --------------6wB5F71K5N0v0FYtSDTKrYiL Content-Type: multipart/mixed; boundary="------------fCklgzjebK6O0Qf6y2En9DsP"; protected-headers="v1" From: Juergen Gross To: cve@kernel.org, linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , "security@xenproject.org" Message-ID: Subject: Re: CVE-2021-47575: xen/console: harden hvc_xen against event channel storms References: <2024061914-CVE-2021-47575-a011@gregkh> In-Reply-To: <2024061914-CVE-2021-47575-a011@gregkh> --------------fCklgzjebK6O0Qf6y2En9DsP Content-Type: multipart/mixed; boundary="------------dkArWSrYhxW88ct20fn5EoNL" --------------dkArWSrYhxW88ct20fn5EoNL Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 T24gMTkuMDYuMjQgMTY6NTQsIEdyZWcgS3JvYWgtSGFydG1hbiB3cm90ZToNCj4gRGVzY3Jp cHRpb24NCj4gPT09PT09PT09PT0NCj4gDQo+IEluIHRoZSBMaW51eCBrZXJuZWwsIHRoZSBm b2xsb3dpbmcgdnVsbmVyYWJpbGl0eSBoYXMgYmVlbiByZXNvbHZlZDoNCj4gDQo+IHhlbi9j b25zb2xlOiBoYXJkZW4gaHZjX3hlbiBhZ2FpbnN0IGV2ZW50IGNoYW5uZWwgc3Rvcm1zDQo+ IA0KPiBUaGUgWGVuIGNvbnNvbGUgZHJpdmVyIGlzIHN0aWxsIHZ1bG5lcmFibGUgZm9yIGFu IGF0dGFjayB2aWEgZXhjZXNzaXZlDQo+IG51bWJlciBvZiBldmVudHMgc2VudCBieSB0aGUg YmFja2VuZC4gRml4IHRoYXQgYnkgdXNpbmcgYSBsYXRlZW9pIGV2ZW50DQo+IGNoYW5uZWwu DQo+IA0KPiBGb3IgdGhlIG5vcm1hbCBkb21VIGluaXRpYWwgY29uc29sZSB0aGlzIHJlcXVp cmVzIHRoZSBpbnRyb2R1Y3Rpb24gb2YNCj4gYmluZF9ldnRjaG5fdG9faXJxX2xhdGVlb2ko KSBhcyB0aGVyZSBpcyBubyB4ZW5idXMgZGV2aWNlIGF2YWlsYWJsZQ0KPiBhdCB0aGUgdGlt ZSB0aGUgZXZlbnQgY2hhbm5lbCBpcyBib3VuZCB0byB0aGUgaXJxLg0KPiANCj4gQXMgdGhl IGRlY2lzaW9uIHdoZXRoZXIgYW4gaW50ZXJydXB0IHdhcyBzcHVyaW91cyBvciBub3QgcmVx dWlyZXMgdG8NCj4gdGVzdCBmb3IgYnl0ZXMgaGF2aW5nIGJlZW4gcmVhZCBmcm9tIHRoZSBi YWNrZW5kLCBtb3ZlIHNlbmRpbmcgdGhlDQo+IGV2ZW50IGludG8gdGhlIGlmIHN0YXRlbWVu dCwgYXMgc2VuZGluZyBhbiBldmVudCB3aXRob3V0IGhhdmluZyBmb3VuZA0KPiBhbnkgYnl0 ZXMgdG8gYmUgcmVhZCBpcyBtYWtpbmcgbm8gc2Vuc2UgYXQgYWxsLg0KPiANCj4gVGhpcyBp cyBwYXJ0IG9mIFhTQS0zOTENCg0KV2hlbiBpc3N1aW5nIFhTQS0zOTEgdGhlIFhlbiBzZWN1 cml0eSB0ZWFtIGFscmVhZHkgYXNzaWduZWQgQ1ZFLTIwMjEtMjg3MTMNCnRvIHRoaXMgaXNz dWUuDQoNCg0KSnVlcmdlbg0K --------------dkArWSrYhxW88ct20fn5EoNL Content-Type: application/pgp-keys; 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