Memory Sealing ‘mseal’ System Call Merged For Linux 6.10
The mseal system call was led by Jeff Xu of Google’s Chrome team. The goal with memory sealing is to also protect the memory mapping itself against modification. The new mseal Linux documentation explains:
“Modern CPUs support memory permissions such as RW and NX bits. The memory permission feature improves security stance on memory corruption bugs, i.e. the attacker can’t just write to arbitrary memory and point the code to it, the memory has to be marked with X bit, or else an exception will happen. Memory sealing additionally protects the mapping itself against modifications. This is useful to mitigate memory corruption issues where a corrupted pointer is passed to a memory management system… Memory sealing can automatically be applied by the runtime loader to seal .text and .rodata pages and applications can additionally seal security-critical data at runtime. A similar feature already exists in the XNU kernel with the VM_FLAGS_PERMANENT flag and on OpenBSD with the mimmutable syscall.”
The mseal system call is designed to be used by the likes of the GNU C Library “glibc” while loading ELF executables to seal non-writable memory segments or by the Google Chrome web browser and other browsers for protecting security sensitive data structures.
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Technical Issues’ Stall MLB’s Adoption of Robots to Call Balls and Strikes
“We still have some technical issues,” baseball Commissioner Rob Manfred said Thursday. NBC News reports:
“We haven’t made as much progress in the minor leagues this year as we sort of hoped at this point. I think it’s becoming more and more likely that this will not be a go for ’25.”
Major League Baseball has been experimenting with the automated ball-strike system in minor leagues since 2019. It is being used at all Triple-A parks this year for the second straight season, the robot alone for the first three games of each series and a human with a [robot-assisted] challenge system in the final three.
In “challenge-system” games, robo-umpires are only used for quickly ruling on challenges to calls from human umpires. (As demonstrated in this 11-second video.)
CBS Sports explains:
Each team is given a limited number of “incorrect” challenges per game, which incentivizes judicious use of challenges… In some ways, the challenge system is a compromise between the traditional method of making ball-strike calls and the fully automated approach. That middle ground may make approval by the various stakeholders more likely to happen and may lay the foundation for full automation at some future point.
Manfred cites “a growing consensus in large part” from Major League players that that’s how they’d want to see robo-umpiring implemented, according to a post on X.com from The Athletic’s Evan Drellich. (NBC notes one concern is eliminating the artful way catchers “frame” caught pitches to convince umpires a pitch passed through the strike zone.)
But umpires face greater challenges today, adds CBS Sports:
The strong trend, stretching across years, of increased pitch velocity in the big leagues has complicated the calling of balls and strikes, as has the emphasis on high-spin breaking pitches. Discerning balls from strikes has always been challenging, and the stuff of the contemporary major-league pitcher has made anything like perfect accuracy beyond the capabilities of the human eye. Big-league umpires are highly skilled, but the move toward ball-strike automation and thus a higher tier of accuracy is likely inevitable. Manfred’s Wednesday remarks reinforce that perception.
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Pew Research Finds 64% of Americans Live Within Two Miles of a Public EV Charger
And those who live closest to public chargers “view EVs more positively.”
The vast majority of EV charging occurs at home, but access to public infrastructure is tightly linked with Americans’ opinions of electric vehicles themselves. Our analysis finds that Americans who live close to public chargers view EVs more positively than those who are farther away. Even when accounting for factors like partisan identification and community type, Americans who live close to EV chargers are more likely to say they:
– Already own an electric or hybrid vehicle
– Would consider buying an EV for their next vehicle
– Favor phasing out production of new gasoline cars and trucks by 2035
– Are confident that the U.S. will build the necessary infrastructure to support large numbers of EVs on the roads
The number of EV charging stations has more than doubled since 2020. In December 2020, the Department of Energy reported that there were nearly 29,000 public charging stations nationwide. By February 2024, that number had increased to more than 61,000 stations. Over 95% of the American public now lives in a county that has at least one public EV charging station.
EV charging stations are most accessible to residents of urban areas: 60% of urban residents live less than a mile from the nearest public EV charger, compared with 41% of those in the suburbs and just 17% of rural Americans.
California is home to about 25% of all of America’s charging stations, according to the report. But this means EV-owning Californians “might also have a harder time than residents of many states when it comes to the actual experience of finding and using a charger.”
Despite having the most charging stations of any state, California’s 43,780 individual public charging ports must provide service for the more than 1.2 million electric vehicles registered to its residents. That works out to one public port for every 29 EVs, a ratio that ranks California 49th across all 50 states and the District of Columbia.
At the other end of the spectrum, Wyoming (one-to-six), North Dakota (one-to-six) and West Virginia (one-to-eight) have the most ports relative to the much smaller number of EVs registered in their respective states.
Another interesting finding? “Attitudes toward EVs don’t differ that much based on how often people take long car trips.
“In fact, those who regularly drive more than 100 miles are slightly more likely to say they currently own an electric vehicle or hybrid — and also to say they’d consider purchasing an EV in the future — when compared with those who make these trips less often.”
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How Internet Pioneers Celebrated 50 Years of the Internet
The event featured talks on the origins of the internet from 80-year-old “father of the internet” Vint Cerf, along with John Shoch (who helped develop the Ethernet and internetwork protocols at Xerox PARC), Judith Estrin (who worked with Cerf on the TCP project), and Robert Kahn (who with Cerf first proposed the IP and TCP protocols). Ethernet co-inventor Bob Metcalfe also spoke at the end of the event.
Long-time Slashdot reader repett0 was an onsite volunteer, and shares that “it was incredible to meet and greet such a wonderful mix of people making technology happen… [T]he event celebrated many key technologies and innovators from the past 50 years and considerations of what is to come in the next 50 years.”
Video streams are available and more are coming online (including interviews with key innovators, society leadership, and more). If you could not make this event event, follow-on activities continue, including the People-Centered Internet Imagine Workshop where a mix of society is working together to consider how to improve humanity’s intersection with ever-expanding abilities thanks to technology.
They add that the event was made possible “through the collaboration of many professional computing societies” including the IEEE, People-Centered Internet, Google, Internet Society, IEEE Computer Society, GIANT Protocol, IEEE Foundation — and volunteers from the SF Bay Area ACM and Internet Society.
Read more of this story at Slashdot.