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Mon, 21 Sep 2026 10:14:59 -0400 X-MC-Unique: aXu1BVHwN_OPLkok5J7aYw-1 X-Mimecast-MFC-AGG-ID: aXu1BVHwN_OPLkok5J7aYw_1790000097 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7805B180B5C9; Mon, 21 Sep 2026 14:14:57 +0000 (UTC) Received: from fedora (headnet03.pony-001.prod.iad2.dc.redhat.com [10.2.32.114]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with SMTP id EF8DD1800348; Mon, 21 Sep 2026 14:14:53 +0000 (UTC) Received: by fedora (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Mon, 21 Sep 2026 16:14:57 +0200 (CEST) Date: Mon, 21 Sep 2026 16:14:52 +0200 From: Oleg Nesterov To: Christian Brauner Cc: Chris Mason , linux-fsdevel@vger.kernel.org, Jens Axboe , Alexander Viro , Jan Kara , NeilBrown , Ingo Molnar , Peter Zijlstra , linux-mm@kvack.org, io-uring@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v3 12/17] exec: cancel io_uring requests before de_thread() Message-ID: References: <20260921-work-coredump-fixes-v3-0-8e4adb1619e6@kernel.org> <20260921-work-coredump-fixes-v3-12-8e4adb1619e6@kernel.org> MIME-Version: 1.0 In-Reply-To: <20260921-work-coredump-fixes-v3-12-8e4adb1619e6@kernel.org> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Mimecast-MFC-PROC-ID: eI4H1HqEwrRqVoSdVncxKTFUjOXehj4i5nbYFzkZODQ_1790000097 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 4C701140006 X-Stat-Signature: 9d6767namkhq33wcf1q3xeyrmriuwdix X-Rspam-User: X-HE-Tag: 1790000106-127549 X-HE-Meta: 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 D/14rmEt /1sdjkWG5Mv4dqV7RAWaIx70epnbyAglp62NeQptZBQjfYX6ADsKfzcnGrdKJ7AOOIJJJM1Se6Sox7XPxKpWpz8FT0JVPKTTjHQ/RZqHIaapttViWoydLiAQb9lMasyD3RF89Gk6+HIDGmIw1PrwdzZcsermy/23XQ/vMpgKj9LUKRTqUL5ULFJ7jrQ9oW3YwxnjpyOKvp9N3Pt8foGdePJnDFKCr+sLWjdWKvRj1ZwWNZgVamWvcalGSx8nt0xGpNpUfBcNrPvorAAZ7SF/buhUa4LGG/jm+dtkl4qL0nT5uSC59VXk/Ao7Or/y+Xkox69OZptnHy64Z15v9R44g7FPu3d0D/HkomE5GLBiXcznSATnuK1fEp/5IgGmOGR1CQqYFzJQOOmpNEe+eieJNOKYpqpxxD4NfvIHh63wiQdfJoUlgIXrTVTAB6nBHQ9ca+VZT Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 09/21, Christian Brauner wrote: > > --- a/fs/exec.c > +++ b/fs/exec.c > @@ -1149,16 +1149,19 @@ int begin_new_exec(struct linux_binprm * bprm) > */ > bprm->point_of_no_return = true; > > + /* > + * Cancel any io_uring activity across execve. This runs task work > + * that may still create an io-wq worker, so do it while de_thread() > + * can still zap it. > + */ > + io_uring_task_cancel(); Acked-by: Oleg Nesterov