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Fri, 9 Aug 2024 18:27:48 +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 tr2yAaRftmayUwAAD6G6ig (envelope-from ); Fri, 09 Aug 2024 18:27:48 +0000 Date: Fri, 9 Aug 2024 20:27:46 +0200 From: David Sterba To: Jann Horn Cc: Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Andrew Morton , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Vlastimil Babka , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Marco Elver , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, David Sterba , syzbot+263726e59eab6b442723@syzkaller.appspotmail.com Subject: Re: [PATCH v8 0/2] allow KASAN to detect UAF in SLAB_TYPESAFE_BY_RCU slabs Message-ID: <20240809182746.GB25962@twin.jikos.cz> Reply-To: dsterba@suse.cz References: <20240809-kasan-tsbrcu-v8-0-aef4593f9532@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240809-kasan-tsbrcu-v8-0-aef4593f9532@google.com> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) X-Rspamd-Server: rspam03 X-Rspam-User: X-Rspamd-Queue-Id: F34A71C000B X-Stat-Signature: 8gx75g6ijrqipp8wz555d88bqfif94x6 X-HE-Tag: 1723228069-67985 X-HE-Meta: U2FsdGVkX18T8xeczVA7Av+noNQDHL9P3Sn15Dq4l0piIciIBJijDbY60JAOsoqdL5HWMSIMo4MgPnZf3deHFeHvnlmazhk0oEx6WXpRSUIUXlXhTMTxOe6clsZF+NLbOnLbD2Qxi87iYLHjE1iRVSh31ETuLdYDWsf39tnQxnRgiE5U5+2sWFjCaQFyqcQaqb8LFDCXqYdtAJx/nRA22FfXUno43ZAmJtrcYRNvYZ+5JLXxo8i524IeIcMeXxOoWNjJLv/MG0ILOUvDIjpEYFYKBMQBtWPuVXnlAvVhyf/+GiigvaWEAhs+34NxN3z93onbSThnlIcG0pH7B8l52f9Zox/oLN/1xblttrMIYt8cmXkkNchVx/7HzXrvFvlxoaDlhnQzz6N6Ex2Grr3+gJvSMLAdvdt8e7qYTx7ZHytvo1yqKDsEuBFa0sNjppTerC93AoK/u3plYdNy9lXtjToda++k8rjN/JKXWYXvh7pnyQtt0F4xbzo5Jzi1/9KP8FX/Re1XtoXJLN+WwXyVNLZx1GPsLNgMnxyaszUIDnNJvauBoQIK48h6diyo3UBffvgAgCAN4Bd5YsLMlQOj1zTd2tqbYpBCLsu0Kt+tECpTcZFdFh6jCMBsCR9O+V2v/fmoezUSQvugu86VLRHHCkQQ8SLSpva8UwgkaeZN2Y72OgDRdlMApK+XkAH3ZxWKvwmXBYP0PmAyZToKoOqy1JzceJeYSG6uv/SF6Zy5I6wZOVRUtNgmzHR6/T5Sq3B1t/clUAxldd1LLjYWJIak28FKro8JW1hwF89AWwyRlOqf1jFFv9CQvZCMTWZCYWgeUy4kqTdG8s+FLkAkiwkgcRRRH8VSwnpfoJ16qxVtO4pX1OuyaR41VQ4aEoauAoxUpA6dphuVTm8rTZwntDAGKSwcLtJY8VGhCaoCvggDnb+hvSNJzCM5PUIQT0RZMUpyNsel7nk7/f3bdbW9U0a Zh+Ghd+I 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Aug 09, 2024 at 05:36:54PM +0200, Jann Horn wrote: > Changes in v8: > - in patch 2/2: > - move rcu_barrier() out of locked region (vbabka) > - rearrange code in slab_free_after_rcu_debug (vbabka) > - Link to v7: https://lore.kernel.org/r/20240808-kasan-tsbrcu-v7-0-0d0590c54ae6@google.com > > Changes in v7: > - in patch 2/2: > - clarify kconfig comment (Marco) > - fix memory leak (vbabka and dsterba) FWIW, I've retested v7 and got no OOM (caused by the leak), on KASAN, KFENCE and other debugging options enabled.