From nobody Sun Nov 24 09:45:51 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=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1724165135; cv=none; d=zohomail.com; s=zohoarc; b=e6zZfh4hF9NAY0BBuj/KmUGwXSg2s6UqCN864ObyWJEE9TrXEr0L1xZWJOJOPHhhJ044jkuVEwQwlb35Rq55hBaQJgoxVB1KpBkMH7fd4ZT6GRQtul2MKoLbs5ath5GzniY7F30hMLjJyLCglk8y7x9x6+HHAa4/e1TCiqNQ7ZE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1724165135; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=jMTfh60pZgpwtOsRiM0kPB17tfn1jZZzt39WO8xs1HQ=; b=Isily/rUEkMw8MoNK2DTWLNz2jbExX4aGqJIhfEmzr8HN3CD+JHdk25cE7AJBeeM7goaeTHbTHqZVotuMIlm3EhcyyUtb5sRT77/dDxuc2vBjyjVFDRSU0veNMLZp2b9apG3lxdop6FoRWhSogmh7uDB2cP6osUhN055aKpsKyk= 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 172416513557832.65131046224451; Tue, 20 Aug 2024 07:45:35 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sgQ69-0000Ym-On; Tue, 20 Aug 2024 10:44:37 -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 1sgQ67-0000Xd-2S for qemu-devel@nongnu.org; Tue, 20 Aug 2024 10:44:35 -0400 Received: from mail-wm1-x32f.google.com ([2a00:1450:4864:20::32f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sgQ64-0005Z0-RE for qemu-devel@nongnu.org; Tue, 20 Aug 2024 10:44:34 -0400 Received: by mail-wm1-x32f.google.com with SMTP id 5b1f17b1804b1-429e29933aaso43305715e9.0 for ; Tue, 20 Aug 2024 07:44:32 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3718985a6d1sm13423340f8f.57.2024.08.20.07.44.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Aug 2024 07:44:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1724165070; x=1724769870; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=jMTfh60pZgpwtOsRiM0kPB17tfn1jZZzt39WO8xs1HQ=; b=Jk/2FBH2ghoEDJG68qJolXQcolj6qIhYPCv1aHfTC9iA9KJxQiyzrQVE6wLMRDH3Xy zsx64HH6WXqiUAMVjY2k8RaLngXlvYK8d3p+7rRAYjx0Qk0Gpmw43IHSFHjCffxC1+m4 /rmOWIESrRrIHyufdFE14sJ+28JorXRBVcneUX4mFmncbI8weuzW3rf6tAiFifMnX7h1 vbuZmNu3UOlmjSP36orhP278y6Z3abVJYUBqdf76ZtObWphWRWQ1MYYpLoOWmv4ddeYl 2eLI1xhuwkUGEINkZ83vA22y1AfwlygBuL5ABAlIiNjp9eHFxFXxyxj/zKV3FKpy0xY+ DB8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724165070; x=1724769870; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=jMTfh60pZgpwtOsRiM0kPB17tfn1jZZzt39WO8xs1HQ=; b=UA1RiTnxj3vn+kY2v5fHnLOWKtzm+k/e2Ps4+ler7/4Bcg3CW86xBRTGbOar9r1a6O UOv4ZhO+ZsTmySwC6l3/XIjTTLr7fSKXsOWBs+JXyrZdO5vwd5Rjr0OqNKkDkscbo/XN Lpb7F06+p1IGZDWDXBEpAp548lVG/iMBXRiL4dN1mU4toy9W6gCNpvCN1SQ9gvJ2bV00 HBmpF0dwU0Vbwm0XNXMyCf62Fr/ArAPfwFHo5OF5jrayG+wfWzxSflPm9Gq7vM0t2pmr sx2GUSbCHuID5FBtEKsNOZo7wmOnYfjnVCV6qq+fsD5KtHk0Ev0tuHuO9C9i6wNOj86A lBCw== X-Gm-Message-State: AOJu0Yxc2HvQS8uIK9qvjfP889N//NqewyfUbKdGoRfi6aY4aFORfScx 4rqZxxU70bl5qnkwUi6AoANZEHuX18zFOpIsjEsXhGdbfb0wEUVWnbJaBj0y2dJMbYkJY4EA2uZ M X-Google-Smtp-Source: AGHT+IH90o0kY57HHJesl8nY4qa74NmQRgM+McKbrRoVBb3GxkUPmsYZHlFghX4oUTt8wLQjC1amjg== X-Received: by 2002:a5d:5110:0:b0:34d:ae98:4e7 with SMTP id ffacd0b85a97d-3719469531fmr9051762f8f.41.1724165070374; Tue, 20 Aug 2024 07:44:30 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Cc: Peter Xu , Fabiano Rosas Subject: [PATCH for-9.1?] migration/multifd: Free MultiFDRecvParams::data Date: Tue, 20 Aug 2024 15:44:29 +0100 Message-Id: <20240820144429.320176-1-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2a00:1450:4864:20::32f; envelope-from=peter.maydell@linaro.org; helo=mail-wm1-x32f.google.com 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, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @linaro.org) X-ZM-MESSAGEID: 1724165137439116600 Content-Type: text/plain; charset="utf-8" In multifd_recv_setup() we allocate (among other things) * a MultiFDRecvData struct to multifd_recv_state::data * a MultiFDRecvData struct to each multfd_recv_state->params[i].data (Then during execution we might swap these pointers around.) But in multifd_recv_cleanup() we free multifd_recv_state->data in multifd_recv_cleanup_state() but we don't ever free the multifd_recv_state->params[i].data. This results in a memory leak reported by LeakSanitizer: (cd build/asan && \ ASAN_OPTIONS=3D"fast_unwind_on_malloc=3D0:strip_path_prefix=3D/mnt/nvmed= isk/linaro/qemu-from-laptop/qemu/build/asan/../../" \ QTEST_QEMU_BINARY=3D./qemu-system-x86_64 \ ./tests/qtest/migration-test --tap -k -p /x86_64/migration/multifd/file/= mapped-ram ) [...] Direct leak of 72 byte(s) in 3 object(s) allocated from: #0 0x561cc0afcfd8 in __interceptor_calloc (/mnt/nvmedisk/linaro/qemu-fr= om-laptop/qemu/build/asan/qemu-system-x86_64+0x218efd8) (BuildId: be72e086d= 4e47b172b0a72779972213fd9916466) #1 0x7f89d37acc50 in g_malloc0 debian/build/deb/../../../glib/gmem.c:16= 1:13 #2 0x561cc1e9c83c in multifd_recv_setup migration/multifd.c:1606:19 #3 0x561cc1e68618 in migration_ioc_process_incoming migration/migration= .c:972:9 #4 0x561cc1e3ac59 in migration_channel_process_incoming migration/chann= el.c:45:9 #5 0x561cc1e4fa0b in file_accept_incoming_migration migration/file.c:13= 2:5 #6 0x561cc30f2c0c in qio_channel_fd_source_dispatch io/channel-watch.c:= 84:12 #7 0x7f89d37a3c43 in g_main_dispatch debian/build/deb/../../../glib/gma= in.c:3419:28 #8 0x7f89d37a3c43 in g_main_context_dispatch debian/build/deb/../../../= glib/gmain.c:4137:7 #9 0x561cc3b21659 in glib_pollfds_poll util/main-loop.c:287:9 #10 0x561cc3b1ff93 in os_host_main_loop_wait util/main-loop.c:310:5 #11 0x561cc3b1fb5c in main_loop_wait util/main-loop.c:589:11 #12 0x561cc1da2917 in qemu_main_loop system/runstate.c:801:9 #13 0x561cc3796c1c in qemu_default_main system/main.c:37:14 #14 0x561cc3796c67 in main system/main.c:48:12 #15 0x7f89d163bd8f in __libc_start_call_main csu/../sysdeps/nptl/libc_s= tart_call_main.h:58:16 #16 0x7f89d163be3f in __libc_start_main csu/../csu/libc-start.c:392:3 #17 0x561cc0a79fa4 in _start (/mnt/nvmedisk/linaro/qemu-from-laptop/qem= u/build/asan/qemu-system-x86_64+0x210bfa4) (BuildId: be72e086d4e47b172b0a72= 779972213fd9916466) Direct leak of 24 byte(s) in 1 object(s) allocated from: #0 0x561cc0afcfd8 in __interceptor_calloc (/mnt/nvmedisk/linaro/qemu-fr= om-laptop/qemu/build/asan/qemu-system-x86_64+0x218efd8) (BuildId: be72e086d= 4e47b172b0a72779972213fd9916466) #1 0x7f89d37acc50 in g_malloc0 debian/build/deb/../../../glib/gmem.c:16= 1:13 #2 0x561cc1e9bed9 in multifd_recv_setup migration/multifd.c:1588:32 #3 0x561cc1e68618 in migration_ioc_process_incoming migration/migration= .c:972:9 #4 0x561cc1e3ac59 in migration_channel_process_incoming migration/chann= el.c:45:9 #5 0x561cc1e4fa0b in file_accept_incoming_migration migration/file.c:13= 2:5 #6 0x561cc30f2c0c in qio_channel_fd_source_dispatch io/channel-watch.c:= 84:12 #7 0x7f89d37a3c43 in g_main_dispatch debian/build/deb/../../../glib/gma= in.c:3419:28 #8 0x7f89d37a3c43 in g_main_context_dispatch debian/build/deb/../../../= glib/gmain.c:4137:7 #9 0x561cc3b21659 in glib_pollfds_poll util/main-loop.c:287:9 #10 0x561cc3b1ff93 in os_host_main_loop_wait util/main-loop.c:310:5 #11 0x561cc3b1fb5c in main_loop_wait util/main-loop.c:589:11 #12 0x561cc1da2917 in qemu_main_loop system/runstate.c:801:9 #13 0x561cc3796c1c in qemu_default_main system/main.c:37:14 #14 0x561cc3796c67 in main system/main.c:48:12 #15 0x7f89d163bd8f in __libc_start_call_main csu/../sysdeps/nptl/libc_s= tart_call_main.h:58:16 #16 0x7f89d163be3f in __libc_start_main csu/../csu/libc-start.c:392:3 #17 0x561cc0a79fa4 in _start (/mnt/nvmedisk/linaro/qemu-from-laptop/qem= u/build/asan/qemu-system-x86_64+0x210bfa4) (BuildId: be72e086d4e47b172b0a72= 779972213fd9916466) SUMMARY: AddressSanitizer: 96 byte(s) leaked in 4 allocation(s). Free the params[i].data too. Cc: qemu-stable@nongnu.org Fixes: d117ed0699d41 ("migration/multifd: Allow receiving pages without pac= kets") Signed-off-by: Peter Maydell Reviewed-by: Fabiano Rosas --- This bug was in the 9.0 release, so not a regression we absolutely must fix for 9.1. I have also only tested this by running the migration-test test suite. NB that the tests themselves have a pile of leaks; I'm about to send a separate patchseries for those. migration/multifd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/migration/multifd.c b/migration/multifd.c index 552f9723c82..a6db05502aa 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -1357,6 +1357,8 @@ static void multifd_recv_cleanup_channel(MultiFDRecvP= arams *p) qemu_mutex_destroy(&p->mutex); qemu_sem_destroy(&p->sem_sync); qemu_sem_destroy(&p->sem); + g_free(p->data); + p->data =3D NULL; g_free(p->name); p->name =3D NULL; p->packet_len =3D 0; --=20 2.34.1