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GET /api/1.2/patches/2227470/?format=api
{ "id": 2227470, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2227470/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260423191958.1440-36-farosas@suse.de/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.2/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260423191958.1440-36-farosas@suse.de>", "list_archive_url": null, "date": "2026-04-23T19:19:49", "name": "[PULL,35/43] migration: validate page_size in mapped-ram header before use", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "eab37cac1012aac36280c3ead42b8bff38c99a57", "submitter": { "id": 85343, "url": "http://patchwork.ozlabs.org/api/1.2/people/85343/?format=api", "name": "Fabiano Rosas", "email": "farosas@suse.de" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260423191958.1440-36-farosas@suse.de/mbox/", "series": [ { "id": 501236, "url": "http://patchwork.ozlabs.org/api/1.2/series/501236/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=501236", "date": "2026-04-23T19:19:14", "name": "[PULL,01/43] checkpatch: Allow spaces after all coroutine annotations", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/501236/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2227470/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2227470/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256\n header.s=susede2_rsa header.b=JpIV7OW1;\n\tdkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=zyolQZB/;\n\tdkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de\n header.a=rsa-sha256 header.s=susede2_rsa header.b=JpIV7OW1;\n\tdkim=neutral header.d=suse.de header.i=@suse.de header.a=ed25519-sha256\n header.s=susede2_ed25519 header.b=zyolQZB/;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Thu, 23 Apr 2026 19:20:54 +0000" ], "DKIM-Signature": [ "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n t=1776972055;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=bsC0tAJU0vPUAdnXpmAN2YzSuLZ8Ne5Etd51mKJ9OnE=;\n b=JpIV7OW1MnIZkmAFwYZOyVotq/KrMRFP2Dk9JMty+LMdFKiKKWpm7EvkWFnG9Ixpw7XqKS\n GNqg0rZ7MquIlSWh2juHkP7zdUD8WioEZVHgE/pA8pRJn4+BLy2jzJQsOjNviqXFhkwQKu\n pfUlYJPBwuxz0PGYVw/0E5poccUmR1Y=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1776972055;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=bsC0tAJU0vPUAdnXpmAN2YzSuLZ8Ne5Etd51mKJ9OnE=;\n b=zyolQZB/q8PtIQk5sdD1mJbyuuqDzQ0/hB7BfbTrBnkQdzfdjaXmrDEQK7cSu6ui2c1V/y\n 5fZaZ5HzjOZ1D2DA==", "v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_rsa;\n t=1776972055;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=bsC0tAJU0vPUAdnXpmAN2YzSuLZ8Ne5Etd51mKJ9OnE=;\n b=JpIV7OW1MnIZkmAFwYZOyVotq/KrMRFP2Dk9JMty+LMdFKiKKWpm7EvkWFnG9Ixpw7XqKS\n GNqg0rZ7MquIlSWh2juHkP7zdUD8WioEZVHgE/pA8pRJn4+BLy2jzJQsOjNviqXFhkwQKu\n pfUlYJPBwuxz0PGYVw/0E5poccUmR1Y=", "v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de;\n s=susede2_ed25519; t=1776972055;\n h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc:\n mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=bsC0tAJU0vPUAdnXpmAN2YzSuLZ8Ne5Etd51mKJ9OnE=;\n b=zyolQZB/q8PtIQk5sdD1mJbyuuqDzQ0/hB7BfbTrBnkQdzfdjaXmrDEQK7cSu6ui2c1V/y\n 5fZaZ5HzjOZ1D2DA==" ], "From": "Fabiano Rosas <farosas@suse.de>", "To": "qemu-devel@nongnu.org", "Cc": "Peter Xu <peterx@redhat.com>,\n\tTrieu Huynh <vikingtc4@gmail.com>", "Subject": "[PULL 35/43] migration: validate page_size in mapped-ram header\n before use", "Date": "Thu, 23 Apr 2026 16:19:49 -0300", "Message-ID": "<20260423191958.1440-36-farosas@suse.de>", "X-Mailer": "git-send-email 2.51.0", "In-Reply-To": "<20260423191958.1440-1-farosas@suse.de>", "References": "<20260423191958.1440-1-farosas@suse.de>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Spamd-Result": "default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%];\n MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000];\n R_MISSING_CHARSET(0.50)[];\n R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain];\n MX_GOOD(-0.01)[]; TO_MATCH_ENVRCPT_ALL(0.00)[];\n MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[];\n DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519];\n RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from];\n FUZZY_RATELIMITED(0.00)[rspamd.com];\n FREEMAIL_CC(0.00)[redhat.com,gmail.com]; RCVD_TLS_ALL(0.00)[];\n RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[];\n FROM_HAS_DN(0.00)[];\n SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from];\n DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.de:mid,suse.de:dkim,suse.de:email];\n RCVD_VIA_SMTP_AUTH(0.00)[];\n RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received];\n DKIM_TRACE(0.00)[suse.de:+]; RCPT_COUNT_THREE(0.00)[3];\n FREEMAIL_ENVRCPT(0.00)[gmail.com]", "X-Rspamd-Action": "no action", "X-Spam-Score": "-3.01", "X-Rspamd-Server": "rspamd1.dmz-prg2.suse.org", "X-Rspamd-Queue-Id": "566AB6A8B0", "Received-SPF": "pass client-ip=2a07:de40:b251:101:10:150:64:1;\n 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,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001,\n 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": "qemu development <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "From: Trieu Huynh <vikingtc4@gmail.com>\n\nmapped_ram_read_header() reads page_size from the migration stream and\nstores it in MappedRamHeader, but does not validate that the value is\nnon-zero before it is later used in parse_ramblock_mapped_ram():\n\nnum_pages = length / header.page_size;\n\nIf a corrupted or malformed migration stream provides invalid, guest\nresumes either with corrupted memory or crashes unexpectedly (eg.\npage_size = 0)\n\nAdd validation in mapped_ram_read_header() to reject invalid page_size\nvalues early and return an error instead of continuing with an invalid\nheader.\n\nSteps to reproduce:\n\nCreate a migration snapshot with mapped-ram enabled:\n(qemu) migrate_set_capability mapped-ram on\n(qemu) migrate file:/tmp/qemu-snapshots/snapshot.bin\nModify the snapshot so that MappedRamHeader.page_size becomes diff with\ntarget psize. (0/512/8192/1GB).\nRestore the snapshot:\n(qemu) migrate_set_capability mapped-ram on\n(qemu) migrate_incoming file:/tmp/qemu-snapshots/snapshot.bin\n\nAs-is:\n* [0]: Floating point exception (core dumped)\n* [512/8192]: Silent corruption\n* [1GB]: \"post load hook failed for: kvm-tpr-opt\" (EPERM)\nTo-be:\n* All: qemu-system-x86_64: Migration mapped-ram header has invalid\n page_size [val] (expected 4096)\n\nSigned-off-by: Trieu Huynh <vikingtc4@gmail.com>\nReviewed-by: Fabiano Rosas <farosas@suse.de>\nReviewed-by: Peter Xu <peterx@redhat.com>\nLink: https://lore.kernel.org/qemu-devel/20260405094447.11347-1-viking4@gmail.com\nSigned-off-by: Fabiano Rosas <farosas@suse.de>\n---\n migration/ram.c | 6 ++++++\n 1 file changed, 6 insertions(+)", "diff": "diff --git a/migration/ram.c b/migration/ram.c\nindex 979751f61b..2046f16caa 100644\n--- a/migration/ram.c\n+++ b/migration/ram.c\n@@ -3088,6 +3088,12 @@ static bool mapped_ram_read_header(QEMUFile *file, MappedRamHeader *header,\n }\n \n header->page_size = be64_to_cpu(header->page_size);\n+ if (header->page_size != TARGET_PAGE_SIZE) {\n+ error_setg(errp, \"Migration mapped-ram header has invalid \"\n+ \"page_size %\" PRIu64 \" (expected %d)\",\n+ header->page_size, TARGET_PAGE_SIZE);\n+ return false;\n+ }\n header->bitmap_offset = be64_to_cpu(header->bitmap_offset);\n header->pages_offset = be64_to_cpu(header->pages_offset);\n \n", "prefixes": [ "PULL", "35/43" ] }