From nobody Sun Nov 24 04:10:26 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=suse.de ARC-Seal: i=1; a=rsa-sha256; t=1726599552; cv=none; d=zohomail.com; s=zohoarc; b=fy7T/NtizWeQLDHZ7l8YN4kDskGD1d65jDB11D7hysD7zuoweDDQgqcTQ054C1QfDHVLZ5ol0wXVIY6x9iNC55NZ4ui4/VT2QI7VzVQWZEQy2wXtmtY+WUpWab+kJimWfc1bNmBVrE/xTvPkw6H2cIyBBF8On2p7VPX+z8KRFkg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1726599552; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=YgwvSWRC+B/DTj7vD34PlfKGfo1ORAkCPDXuhSv50js=; b=cDibgusP5ZVCKYrvEBg2xCL1Z3LE9nwwz6cT5C22LeJ2T6XSFEo3XjBfVvlAvtIATIiUBP9Yv1d+HKrRpzxrMOMpyBNldt3Yt6fg2Zsk/mT9FL3VI1tKnB5GeuROtRoloJ0UJiKtyS8b8sATagk3H51D+oMRaeIh8NcBSNYCZzw= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1726599552400532.356878558707; Tue, 17 Sep 2024 11:59:12 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sqdOv-0000V2-9b; Tue, 17 Sep 2024 14:58:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sqdOt-0000TH-TB for qemu-devel@nongnu.org; Tue, 17 Sep 2024 14:58:12 -0400 Received: from smtp-out1.suse.de ([2a07:de40:b251:101:10:150:64:1]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sqdOs-0007su-6n for qemu-devel@nongnu.org; Tue, 17 Sep 2024 14:58:11 -0400 Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [IPv6:2a07:de40:b281:104:10:150:64:97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 1565722439; Tue, 17 Sep 2024 18:58:08 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id E3CF013AAA; Tue, 17 Sep 2024 18:58:06 +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 sCkVKj7R6WYiDgAAD6G6ig (envelope-from ); Tue, 17 Sep 2024 18:58:06 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1726599488; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YgwvSWRC+B/DTj7vD34PlfKGfo1ORAkCPDXuhSv50js=; b=fC0ZdF6znUQR1AV6DQySfbDvd5f22w/pwIq7piNvmeZGbiqMB/TDK1rF3rdeIRA5P85xxk g4qLKoKLDX/DaNFJGy+jPFIoPz+Hq4rhcDdRM0a+ZwW6qhGKlU0rQu2/ZXtXa0PTIqAyVe /xS5gibh9GjNNvSRI4noTru16SxFNuI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1726599488; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YgwvSWRC+B/DTj7vD34PlfKGfo1ORAkCPDXuhSv50js=; b=6CcEZRXWpqGA/cUtYs81rM94cX9dbvvNerAF4IIbpcX6njVS1Z7pIb1w/CsKn4+k2JNkN8 Lgm9lXxTrN8px+BQ== Authentication-Results: smtp-out1.suse.de; dkim=pass header.d=suse.de header.s=susede2_rsa header.b=fC0ZdF6z; dkim=pass header.d=suse.de header.s=susede2_ed25519 header.b=6CcEZRXW DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1726599488; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YgwvSWRC+B/DTj7vD34PlfKGfo1ORAkCPDXuhSv50js=; b=fC0ZdF6znUQR1AV6DQySfbDvd5f22w/pwIq7piNvmeZGbiqMB/TDK1rF3rdeIRA5P85xxk g4qLKoKLDX/DaNFJGy+jPFIoPz+Hq4rhcDdRM0a+ZwW6qhGKlU0rQu2/ZXtXa0PTIqAyVe /xS5gibh9GjNNvSRI4noTru16SxFNuI= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1726599488; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=YgwvSWRC+B/DTj7vD34PlfKGfo1ORAkCPDXuhSv50js=; b=6CcEZRXWpqGA/cUtYs81rM94cX9dbvvNerAF4IIbpcX6njVS1Z7pIb1w/CsKn4+k2JNkN8 Lgm9lXxTrN8px+BQ== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Peter Xu , Peter Maydell Subject: [PATCH 1/2] migration/savevm: Remove extra load cleanup calls Date: Tue, 17 Sep 2024 15:58:01 -0300 Message-Id: <20240917185802.15619-2-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240917185802.15619-1-farosas@suse.de> References: <20240917185802.15619-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 1565722439 X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; TO_DN_SOME(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,suse.de:dkim,suse.de:mid,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]; RCVD_TLS_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action X-Spam-Score: -3.01 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a07:de40:b251:101:10:150:64:1; envelope-from=farosas@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @suse.de) X-ZM-MESSAGEID: 1726599552892116600 Content-Type: text/plain; charset="utf-8" There are two qemu_loadvm_state_cleanup() calls that were introduced when qemu_loadvm_state_setup() was still called before loading the configuration section, so there was state to be cleaned up if the header checks failed. However, commit 9e14b84908 ("migration/savevm: load_header before load_setup") has moved that configuration section part to qemu_loadvm_state_header() which now happens before qemu_loadvm_state_setup(). Remove the cleanup calls that are now misplaced. Fixes: 9e14b84908 ("migration/savevm: load_header before load_setup") Reviewed-by: Peter Xu Signed-off-by: Fabiano Rosas --- migration/savevm.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/migration/savevm.c b/migration/savevm.c index d500eae979..d0759694fd 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -2732,13 +2732,11 @@ static int qemu_loadvm_state_header(QEMUFile *f) if (migrate_get_current()->send_configuration) { if (qemu_get_byte(f) !=3D QEMU_VM_CONFIGURATION) { error_report("Configuration section missing"); - qemu_loadvm_state_cleanup(); return -EINVAL; } ret =3D vmstate_load_state(f, &vmstate_configuration, &savevm_stat= e, 0); =20 if (ret) { - qemu_loadvm_state_cleanup(); return ret; } } --=20 2.35.3 From nobody Sun Nov 24 04:10:26 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=suse.de ARC-Seal: i=1; a=rsa-sha256; t=1726599536; cv=none; d=zohomail.com; s=zohoarc; b=HEE0OYGU8ry1VRhCDKwgdKx8QvbiGkM1kNRsz9o7Edle3GGvu7I9Y8PV3QufLElMLlpHvNewl6pxAf17tUMBKLV/q/nG+TP4dCRM8UeCjpFx1aajXSY80Hem2JODAx+SOMVPs8zsU9MB+cZRiFTsuVffma9dGDlO9E5s81mRUw4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1726599536; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=LbLygEtJVaBxRuqfrAcm5XUtKM9vMfxUGYr2q5ibimI=; b=NgtZ9VPIW2vblcpPsMJZjwzfkCMfGS2EJFLOCXFte8gZ+WcsTsH6SnO57cqUd9w5ILrLfqnfy3hmUQd62c7oETmGyVzukF1IHMWaVWig+WUD1KNRVOMmOd3ZK8Y/VFWZMAKi4a9cgfya9aQu+1tU/OLgQKS+gRWL/Cop16CGI0k= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1726599536482361.17042713970534; Tue, 17 Sep 2024 11:58:56 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sqdOx-0000ct-Ei; Tue, 17 Sep 2024 14:58:15 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sqdOv-0000VJ-DF; Tue, 17 Sep 2024 14:58:13 -0400 Received: from smtp-out2.suse.de ([2a07:de40:b251:101:10:150:64:2]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sqdOt-0007t8-Et; Tue, 17 Sep 2024 14:58:13 -0400 Received: from imap1.dmz-prg2.suse.org (unknown [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id E70ED20174; Tue, 17 Sep 2024 18:58:09 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 88A03139CE; Tue, 17 Sep 2024 18:58:08 +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 8D/fE0DR6WYiDgAAD6G6ig (envelope-from ); Tue, 17 Sep 2024 18:58:08 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1726599490; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LbLygEtJVaBxRuqfrAcm5XUtKM9vMfxUGYr2q5ibimI=; b=bK3AtvCdJ21UMnG9f/3zfSff8dW0JNr/WvrwG7Bx1z1uaqipugqRcFwfIH/mdR+gOz49vM qiPMgKOQmiQOrgVQ4q8qCMOGB3q/hnai+MlGp/hnnvdE66lgC4YkpHhk3c+Szr1QMc8EEo wk7fhZ97G1xOqnYQ6GrPVoiHSVZjeQ0= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1726599490; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LbLygEtJVaBxRuqfrAcm5XUtKM9vMfxUGYr2q5ibimI=; b=SZYqFQOad25/HJJMIV17IlJxLkZBYpTsYP+I8/+FwD3GrPIFAeucevViusds4fhmkdx2ie hHr+9vudTuSTDQDw== Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1726599489; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LbLygEtJVaBxRuqfrAcm5XUtKM9vMfxUGYr2q5ibimI=; b=yMXLrmGH/PAvcqb40LAVHTcHDn7gZw6Knzbet6JeHVW/TZjvYuG2xMBnFEW4mI48EyOdEr RDkZI26VMMZ8iUfGleqoHmanLTz78R0ikHMO4Ffzm2+WDCgzb+V4mchhpjmUjOFL7rpJJh ldBEwt7fQemIbuMDQU9Oy1XqHpgSajc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1726599489; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LbLygEtJVaBxRuqfrAcm5XUtKM9vMfxUGYr2q5ibimI=; b=C8I6jADYs8IzIkzKedjpoPfUgz3WB1udg6BCY6a6K2ov4tYu83HKq6DFj+xrk5OHFztQ0I GxwRef+I/9mphZDg== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Peter Xu , Peter Maydell , qemu-stable@nongnu.org Subject: [PATCH 2/2] migration/multifd: Fix rb->receivedmap cleanup race Date: Tue, 17 Sep 2024 15:58:02 -0300 Message-Id: <20240917185802.15619-3-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240917185802.15619-1-farosas@suse.de> References: <20240917185802.15619-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,suse.de:mid,imap1.dmz-prg2.suse.org:helo]; RCVD_TLS_ALL(0.00)[] X-Spam-Score: -2.80 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a07:de40:b251:101:10:150:64:2; envelope-from=farosas@suse.de; helo=smtp-out2.suse.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @suse.de) (identity @suse.de) X-ZM-MESSAGEID: 1726599538762116600 Content-Type: text/plain; charset="utf-8" Fix a segmentation fault in multifd when rb->receivedmap is cleared too early. After commit 5ef7e26bdb ("migration/multifd: solve zero page causing multiple page faults"), multifd started using the rb->receivedmap bitmap, which belongs to ram.c and is initialized and *freed* from the ram SaveVMHandlers. Multifd threads are live until migration_incoming_state_destroy(), which is called after qemu_loadvm_state_cleanup(), leading to a crash when accessing rb->receivedmap. process_incoming_migration_co() ... qemu_loadvm_state() multifd_nocomp_recv() qemu_loadvm_state_cleanup() ramblock_recv_bitmap_set_offset() rb->receivedmap =3D NULL set_bit_atomic(..., rb->receiv= edmap) ... migration_incoming_state_destroy() multifd_recv_cleanup() multifd_recv_terminate_threads(NULL) Move the loadvm cleanup into migration_incoming_state_destroy(), after multifd_recv_cleanup() to ensure multifd threads have already exited when rb->receivedmap is cleared. Adjust the postcopy listen thread comment to indicate that we still want to skip the cpu synchronization. CC: qemu-stable@nongnu.org Fixes: 5ef7e26bdb ("migration/multifd: solve zero page causing multiple pag= e faults") Signed-off-by: Fabiano Rosas Reviewed-by: Peter Xu --- migration/migration.c | 1 + migration/savevm.c | 6 ++++-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index 3dea06d577..b190a574b1 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -378,6 +378,7 @@ void migration_incoming_state_destroy(void) struct MigrationIncomingState *mis =3D migration_incoming_get_current(= ); =20 multifd_recv_cleanup(); + qemu_loadvm_state_cleanup(); =20 if (mis->to_src_file) { /* Tell source that we are done */ diff --git a/migration/savevm.c b/migration/savevm.c index d0759694fd..7e1e27182a 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -2979,7 +2979,10 @@ int qemu_loadvm_state(QEMUFile *f) trace_qemu_loadvm_state_post_main(ret); =20 if (mis->have_listen_thread) { - /* Listen thread still going, can't clean up yet */ + /* + * Postcopy listen thread still going, don't synchronize the + * cpus yet. + */ return ret; } =20 @@ -3022,7 +3025,6 @@ int qemu_loadvm_state(QEMUFile *f) } } =20 - qemu_loadvm_state_cleanup(); cpu_synchronize_all_post_init(); =20 return ret; --=20 2.35.3