deadlock

Xen Security Advisory 463 v2 (CVE-2024-45818) - Deadlock in x86 HVM standard VGA handling

Posted by Xen . org security team on Nov 12

Xen Security Advisory CVE-2024-45818 / XSA-463
version 2

Deadlock in x86 HVM standard VGA handling

UPDATES IN VERSION 2
====================

Public release.

ISSUE DESCRIPTION
=================

The hypervisor contains code to accelerate VGA memory accesses for HVM
guests, when the (virtual) VGA is in "standard" mode. Locking involved
there has an unusual discipline, leaving...




deadlock

Rust's Sneaky Deadlock With `if let` Blocks

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deadlock

We’ve learned the hard way that ganging up on Deadlock doesn’t make it more digestible

The mystery surrounding Deadlock, Valve’s work-in-progress MOBA shooter, has largely evaporated. Its freely extendable invite system is about as effective at controlling player headcount as a disinterested football steward, meaning pretty much anyone with a clued-in Steam friend can get in and start poking around its secrets. And yet, being a lane-pushing wizard fighter in the Dota 2 vein, it’s already a vast tangle of interplaying abilities, items, strats, and often unspoken rules, of the kind that even experienced gankists will take hundreds of hours to learn. It’s been too much for poor Brendy, at any rate.

Still, Brendy is but one man. What if we had but four men, working in tandem to crush lanes and flatten Patrons just as Gabe intended? To find out if Deadlock is indeed more comprehensible as a team sport, Graham, Ed, Ollie, and James joined forces, promptly getting fucked up yet emerging from the warlock hospital with a deeper understanding of its workings. Or, at least, if anyone would keep playing.

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deadlock

'Seminal review can end Premier League deadlock'

EFL chairman Rick Parry tells BBC Sport's Dan Roan about his hopes for the new football regulator as the Football Governance Bill has its second reading before parliament.




deadlock

When does board diversity benefit shareholders? Strategic deadlock as a commitment to monitor [electronic journal].




deadlock

Deadlock on the Board [electronic journal].

National Bureau of Economic Research




deadlock

NSCN (I-M) seeks third-party intervention to break talks deadlock

Accusing the Centre of betraying the Framework Agreement of 2015, the Naga extremist group led by Thuingaleng Muivah threatened to return to violent ways




deadlock

Australian Clean Energy Deadlock Spurs Companies to Focus Abroad

Political deadlock over Australia’s clean energy future is prompting companies such as Vestas Wind Systems A/S and Acciona SA to increasingly turn to rival markets for growth.




deadlock

Australian Clean Energy Deadlock Spurs Companies to Focus Abroad

Political deadlock over Australia’s clean energy future is prompting companies such as Vestas Wind Systems A/S and Acciona SA to increasingly turn to rival markets for growth.




deadlock

Coleen Rooney and Rebekah Vardy's summit to heal rift ends in deadlock

The footballers' wives have been at loggerheads after Coleen, 34, accused Rebekah, 38, of leaking stories about her, and their case could now go to the High Court after failing to reach a resolution.




deadlock

Coleen Rooney and Rebekah Vardy's summit to heal rift ends in deadlock

The footballers' wives have been at loggerheads after Coleen, 34, accused Rebekah, 38, of leaking stories about her, and their case could now go to the High Court after failing to reach a resolution.




deadlock

Argentina debt deadlock remains as president says talks to continue

Argentina's President Alberto Fernandez said on Saturday that talks with bondholders to restructure $65 billion of the country's foreign debt would continue with the two sides still deadlocked over what the final offer should look like.







deadlock

Breaking the Work/Family Deadlock

Stephanie Coontz, professor of history at The Evergreen State College and author of "A Strange Stirring."




deadlock

Haiti: Govt. Formed an Electoral Commission to End Electoral Deadlock; Will the CEP Reschedule the Runoff?

BY WADNER PIERRE

Since the CEP published its tainted and most controversial results for the presidential, second round legislative and local elections early last November, thousands have been demonstrated in the streets of Haiti’s largest cities to reclaim a recount of their votes. Religious leaders and international human rights and advocacy groups have also urged the CEP to investigate irregularities and massive electoral frauds that are no longer mere allegations.

As protests widening, diplomatic talks failed and G8 candidates remaining steadfast in their position, to remedy the situation, Haiti’s PM Evans Paul in an one-page letter sent to the President Michel J. Martelly, proposed a formation of an electoral commission to ensure the credibility of the already festered electoral process.

The commission according to the Prime Minister’s letter will have three days to produce recommendations to the government and the Conseil Electoral Provisoire (Electoral Provisional Council), known as the CEP. The head of the government stated,“ …it is necessary to organize credible, transparent, participative and inclusive elections,” as well as “to do whatever it takes” to create a climate of trust for the actors involving in the process.

The CEP shows no sign that it will abide by the recommendations of the government-formed commission. One of its members Marie Carmelle Paul Austin told a radio in the Haiti’s capital that the electoral council members are ready to depart in bloc should the commission interfere in their work. “If this commission’s purpose is to redo or verify the work that the CEP has already done, the council members will resign,” implied council Austin.

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deadlock

New Iraq prime minister after five months of deadlock

Former intelligence chief Mustafa al-Kadhimi has been sworn in as the new prime minister.




deadlock

Burundi: Breaking the Deadlock, The Urgent Need for a New Negotiating Framework




deadlock

Australian Clean Energy Deadlock Spurs Companies to Focus Abroad

Political deadlock over Australia’s clean energy future is prompting companies such as Vestas Wind Systems A/S and Acciona SA to increasingly turn to rival markets for growth.




deadlock

Australian Clean Energy Deadlock Spurs Companies to Focus Abroad

Political deadlock over Australia’s clean energy future is prompting companies such as Vestas Wind Systems A/S and Acciona SA to increasingly turn to rival markets for growth.




deadlock

Democracy in Hong Kong: Might 'none-of-these-candidates' break the deadlock?


Midway through Hong Kong’s second public consultation on the method of electing the next chief executive (CE), both pro-democracy “pan-democrat” legislators and the Hong Kong government and Chinese Central government are still holding their cards close. Following the current public consultation, members of Hong Kong’s Legislative Council (LegCo) will cast an historic vote on political reform. Hong Kong’s mini-constitution, the Basic Law, states that “the ultimate aim is the selection of the CE by universal suffrage upon nomination by a broadly representative nominating committee in accordance with democratic procedures” (Basic Law Art. 45). Pan-democrat LegCo members currently plan to vote against the eventual resolution on political reform, given their dissatisfaction with the reform process to date. Observers predict that passage of a resolution will happen only if the Hong Kong and Central governments can swing a few pan-democrats over to their side in the final hour.

The problem is a prickly one: Is it possible to design an electoral system that is sufficiently open and democratic in the eyes of the Hong Kong people and, at the same time, that guarantees to the Central Government that the elected leader of this special administrative region accepts the supremacy of the Chinese Communist Party? Even as politicians on each side reiterate the near “impossibility” of changing their positions (see e.g., RTHK Backchat discussion with Justice Secretary Rimsky Yuen at 4:25), thought-leaders from Hong Kong’s universities are inventing creative proposals with the potential to break the deadlock.

The Ground Rules

A 2004 decision of the Standing Committee of the National People’s Congress (NPCSC), China’s national legislature, interpreted the Basic Law to require a “Five-Step Process” in order to amend the selection method for the CE. Hong Kong is now between Steps 2 and 3.

  • Step 1: The current CE must submit a report to the NPCSC on the need to amend the electoral system. That submission took place on July 15, 2014 after a five-month initial public consultation process. The CE’s report faced heavy criticism in Hong Kong for not accurately reflecting public opinion.
  • Step 2: The NPCSC must issue a decision affirming the need for the amendment. The NPCSC announced that decision on August 31, 2014. It endorsed a system by which citizens may directly vote for the CE but imposed restrictive conditions on the nomination procedure of eligible candidates. The decision triggered 79 days of protest and civil disobedience – what activists and the media have referred to as the “Umbrella Movement.”
  • Step 3: The Hong Kong government must introduce the political reform bill in LegCo, and two-thirds of legislators must endorse it. The vote in LegCo is scheduled to take place during the first half of 2015, although a precise date has not been set. The purpose of the second-round public consultation is to forge consensus behind political reform within the parameters set out in the August 31 NPCSC decision.
  • Steps 4 and 5: In the event that LegCo endorses the bill, the CE must provide his consent and report the amendment to the NPCSC for its final approval.

If the bill does not receive two-thirds endorsement of LegCo (or if it does, but the NPCSC does not approve) then political reform would fail. Hong Kong would be left with the status quo, and Hong Kong people would lose the opportunity to vote for their chief executive for at least the next seven years.

Limited Room for Negotiation

The terms set out by the August 31 NPCSC decision limit the range of possible political reform options. For that reason, one of the core demands of the Umbrella Movement was to scrap the decision and re-start the Five-Step Process; that didn’t happen, however. In January 2015, the Hong Kong government issued a public consultation document framing the discussion in the lead up to the vote in LegCo. The consultation document hews closely to the NPCSC decision:

  • The Nominating Committee (NC) will resemble the previous committee that elected the CE with the same number of members (1,200) belonging to the same limited number of subsectors (38). The Wall Street Journal recently described that committee as “a hodgepodge of special interests.” During the consultation, citizens may discuss adding new subsectors to make the committee more inclusive and representative (such as adding new subsectors to represent the interests of women or young voters), but restructuring will necessarily mean disrupting and eliminating the positions of existing subsectors or committee members. Therefore, the consultation document suggests these changes are unlikely to be achieved (Consultation Document, Chapter 3, Sec. 3.08 p. 10).
  • The NC will nominate two to three candidates, and each candidate will require endorsement from at least half of the NC membership. (Given the difficulty of restructuring the subsectors or their electoral bases, these terms would effectively exclude any pan-democrats from nomination.) In order to make this more palatable, the consultation document proposes that citizens discuss a two-stage nomination process. In the first stage, a quorum of 100-150 committee members would “recommend” individuals for nomination. The committee would then elect the nominees from this recommended group (Consultation Document, Chapter 4, Sec. 4.09 p. 14). In theory, the meetings when recommendation and nomination votes take place could be staggered in order to allow campaigning and public debate. The idea is that NC members would take public opinion into consideration before casting their second vote.
  • On the voting arrangements, citizens may discuss a “first-past-the-post” arrangement with either a single-round, two-round, or instant runoff vote systems (Consultation Document, Chapter 5, Sec. 5.06 p. 17-19).

Both sides in this negotiation have fired shots across the bow. At the launch of the second public consultation on January 7, Chief Secretary Carrie Lam remarked, “there is no room for any concessions or promises to be made in order to win over support from the pan-democratic members.” For their part, the pan-democrats vowed to boycott the public consultation and veto a resolution that conforms to these terms. They argue that the proposed method of electing the chief executive does not improve upon the status quo.

Most pan-democrat legislators are directly elected from geographical constituencies, and public opinion could provide legitimate grounds for shifting their position. According to polling by the Hong Kong University Public Opinion Programme last month, a plurality of respondents view the Hong Kong government’s proposal as neither a step forward nor a step backward for democracy. If the government were to commit to making the electoral system more democratic in the next CE election in 2022, a clear majority of respondents would then support the government’s plan.

Inventing Options and Finding Common Ground

The two-stage nomination mechanism in the government’s proposal is an acknowledgement that the NC ought to be responsive to public opinion. But without additional tinkering, this procedure does not materially change the incentives of NC members. What if the public had the power to reject the slate of candidates nominated by the committee?

Since the first public consultation, a few academics, including Simon Young at Hong Kong University (HKU), have considered at least two ways this could happen. An “active” approach would allow Hong Kong voters to cast blank votes and require a minimum percentage of affirmative votes for the winning candidate. A “passive” approach would require a minimum voter turnout rate for a valid election. NC members might then have to take public opinion into account.

Early last month, Albert Chen, also a professor at HKU and a legal advisor of the NPCSC, began to advocate publicly for a proposal that employs a ballot with a none-of-these-candidates option (see RTHK Jan. 13 edition of The Pulse). Under his proposal, if a majority of people vote for “none-of-these-candidates,” the slate of candidates put forward by the NC will be voided. When the public votes down the candidates, the NC could revert back to an election committee and choose a provisional CE. Alternatively, the Chief Secretary could assume CE duties during a six-month interim period prior to a new election (drawing upon Basic Law Art. 53). Chen argues that his proposal would give the Hong Kong people—not pan-democrat politicians—decision-making power to accept the new NC and its slate of candidates or to revert back to the status quo.

More recently, Johannes Chan, HKU professor and human rights advocate, floated a competing proposal that would provide voters with the option for negative voting. A 20 percent “no” vote for an otherwise leading candidate would trigger a re-vote. Between the first and second elections, the candidates would have additional time to campaign. If after the second election, still 20 percent of voters oppose the leading candidate, the candidate would be disqualified, and the NC would nominate new candidates. Given Hong Kong’s governance problems and increasing public polarization, the 20 percent veto ensures that no CE will be saddled with a substantial block of Hong Kong society affirmatively opposed to him or her from day one.

Albert Chen’s proposal received a tepid if supportive response in pro-Beijing quarters. Jasper Tsang, the Speaker of LegCo and member of the largest pro-establishment political party, and Rita Fan, a member of the NPCSC, affirmed their view that the none-of-these-candidates mechanism does not violate the Basic Law. While the government’s consultation document does not expressly mention the none-of-these-candidates concept, Hong Kong’s Justice Secretary indicated that the proposal should be considered. Starry Lee, another leader of the biggest pro-establishment party in LegCo, countered that technical difficulties and limited time for discussion would pose obstacles to the none-of-these-candidates ballot proposal.

Pan-democrats so far have tended to rebuff government overtures to engage on the topic. A few legislators, such as the Civic Party’s Ronny Tong, have been willing to engage (with Albert Chen on the Jan. 13 edition of The Pulse) but have reservations about what happens after a voided election, and feel that the threshold for public veto is too high. Law Chi-kwong, a founding member of Hong Kong’s Democratic Party and also a member of the HKU faculty, suggested that the winning candidate ought to receive an absolute majority of votes with blank votes counted. (E.g., when one candidate receives 45 percent, another receives 35 percent, and none-of-these-candidates receives 20 percent, that would lead to a void election.) However, other scholars associated with the Democratic Party have distanced themselves from the blank vote debate and Law’s statements.

The Merits of Blank Voting

The debate over blank and negative voting in Hong Kong unfolds in a global context where none-of-these-candidates has become an increasingly common political choice. Several democracies have institutionalized the practice. Proponents cite instrumental rationales, such as improved accountability and transparency. However, these benefits are not necessarily guaranteed. More broadly, people recognize the inherent value of the “no” vote as a form of political expression.

In the U.S. state of Nevada, for example, a none-of-these-candidates option has appeared on the ballot for all statewide and national elections since 1975. During the 2012 presidential cycle, the Secretary of State of Nevada argued that removing a none-of-these-candidates option would harm Nevada voters by taking away a “legitimate and meaningful ballot choice.” There is precedent for none-of-these-candidates winning a plurality of votes in a congressional primary; in that case, Republican Walden Earnhart finished behind the none-of-these-candidates option but still “won” the primary and got the nomination. More typically, the ballot option plays a “spoiler role.” In the 1998 Senate race, for example, 8,125 votes for none-of-these-candidates dwarfed the 395-vote margin between Harry Reid and John Ensign. This allowed Reid, the incumbent, to be re-elected.

It is hard to find examples where none-of-these-candidates has won a majority of the popular vote. Hong Kong’s pan-democrats may be right to question whether this possibility would meaningfully affect the calculus of the NC. Colombia is one of the few jurisdictions where blank votes can have institutional consequences. The right of citizens to cast a blank vote was established by the Colombian Constitution in 1991, and later codified in political reform statutes in 2003 and 2009. Similar to Albert Chen’s proposal in Hong Kong, if the number of blank votes equals a majority of the total number of votes cast, the election must be repeated. The original candidates cannot participate in the second election.

The Colombian experience suggests that the blank vote is more consequential in races with fewer candidates. Colombian voters have never nullified a slate of candidates at the national-level, where the field is crowded. In the city of Bello, however, the blank vote won the mayoral election in 2011. In that case, the electoral authority disqualified the one opposition candidate. This led to a one-man race and united all opposition forces around the blank vote in order to reject the establishment Conservative Party candidate. In the second round election, the replacement Conservative Party candidate (Carlos Alirio Muñoz López) won 59 percent of the vote. In the end, his party benefited with a resounding popular mandate. By this logic, the blank vote could matter in the two- to three-candidate race contemplated for Hong Kong.

Empirical evidence also suggests that local conditions in Hong Kong could support a relatively high turnout for none-of-these-candidates. Based on data from Spain and Italy, Chiara Superti at Harvard finds that blank voting is a sophisticated political choice, more likely to take place in municipalities with highly educated and politically engaged electorates. Hong Kong would qualify.

Beyond candidate selection, voting is a highly expressive act. A citizen’s vote is an expression of identity as well as a channel for protest. Echoing this view, the Supreme Court of India recently held that the country’s constitutional guarantees of freedom of speech and expression confer on Indian citizens a right to reject all candidates and to exercise their right to affirmatively vote for none-of-these-candidates in secrecy. As a people who define themselves by “core values,” including freedom of expression, this resonates with Hongkongers. More fundamentally, the ballot serves a powerful safety-valve function. At the time universal suffrage was introduced in England and France, the vote was presented as a way to channel political turmoil into more moderate political expression—and this, too, resonates in Hong Kong today.

Views expressed in the article are the author's personal views.

Authors

  • David Caragliano
Image Source: Reuters
       




deadlock

Iraq parliament approves PM Kadhimi's new cabinet after months of deadlock

Iraqi lawmakers approved a new government on Wednesday after six months without one as parties squabbled until the last minute over Cabinet seats in backroom deals.




deadlock

Iraq’s parliament approves new government after six-month deadlock

The Iraqi parliament approved its new government headed by Mustafa Al-Kadhimi, now prime minister. The move ends six months of political vacuum, but many challenges lie ahead, including the country's struggling economy and the re-emergence of the Islamic State group. 




deadlock

US proposes interim government to break Venezuela deadlock

Maduro regime rejects latest Washington plan despite fears of humanitarian catastrophe from Covid-19




deadlock

Clinton and Trump in deadlock in three battlegrounds including Ohio

Hillary Clinton and Donald Trump are in deadlock over America's swing states, with polls showing hairs-breadth gaps between the bitter rivals weeks before the presidential election.




deadlock

Queen's aides hit a 'deadlock' as they try to finalise details of Megxit deal

Buckingham Palace was expected to release a statement 'imminently' on the terms of the couple's arrangement but the discussions have stalled with officials yet to iron out several key issues.




deadlock

Deadlocks in multilateral negotiations : causes and solutions / edited by Amrita Narlikar




deadlock

Holy deadlock and further ribaldries: another dozen medieval French plays in modern English / edited and translated by Jody Enders

Hayden Library - PQ1240.E8 H65 2017




deadlock

The Nagorno-Karabakh deadlock: insights from successful conflict settlements / Azer Babayev, Bruno Schoch, Hans-Joachim Spanger, editors

Online Resource




deadlock

Deadlock avoidance in mixed capacity flexible manufacturing systems




deadlock

Deadlock ends, E Palanisami sworn in as new Tamil Nadu chief minister