Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizen Alejandro86 for the clue delivery! CTOnews.com, October 17, according to the official website, Theo de Raadt released version 7.4 of Unix-like operating system OpenBSD yesterday, which is the 55th version update of OpenBSD.

The main contents of ▲ source OpenBSD official website CTOnews.com are as follows:

Kernel improvements: on the arm64 architecture, BTI and SBSS features are shown in dmesg (8).

A new kqueue1 (2) system call is introduced to support the O_CLOEXEC flag.

Add a read-write mapping to the device tree to repair the root partition on softraid (4).

Correctly identify the umass (4) floppy disk device as a floppy disk drive.

Update the frame characters in wscons (4) to adapt to the unicode standard.

Fixed undefined behavior when using the MS-DOS file system.

Use deep idle state on the arm64 architecture to save energy.

Update AMD CPU support.

Resolve the problem of 'Zenbleed' AMD CPU error.

The conjecture control bit is reported in the dmesg (8) CPU line.

Optimize the clock interrupt preparation of the main CPU and separate the initialization part of cpu_initclocks ().

SMP improvements: rewrite pfsync (4), improve locking and parallelization of the network stack.

Removes kernel locks from the ARP input path.

Separate the MP secure arprequest () from the kernel lock.

Remove kernel locks from IPv6 neighbor discovery.

Unlock ioctl (2) and more parts of the routing code in the network stack.

Direct rendering Manager and graphics driver improvements:

Update drm (4) to Linux 6.1.55.

Fix end marker in sg_set_page () to avoid memory access errors when using page flipping on Alder Lake and Raptor Lake.

VMM / VMD improvement: allows vmm (4) clients to enable and use IBT.

Hides the visibility of the AMD hardware p state to vmm (4) clients.

Fixed uninitialized memory issues in vmd (8).

Allows vmd_vm.vm_ttyname to be passed as a character array and vmd_vm objects to be passed through the ipc channel.

Improved closing of file descriptors in the vmd (8) vmm process.

Bug fixes and adjustments for user space (userland): introduce a new ISO C11 header file, declaring char32_t and char16_t types and related functions.

Malloc (3) option D that supports memory leak detection using ktrace (1) and kdump (1).

Allow the use of ${.VARIABLES} in make (1) to list the global variable names that have been set.

New kdump (1) option-u to select the utrace (2) trace point.

The-- size-only and-- ignore-times options are supported in openrsync (1).

Update zoneinfo to tzdata2023c.

Use the fixed name format of ucom (4) as a valid format for the cu (1)-l option.

Various bug fixes and user space adjustments.

Network stack improvement: synchronize the use of getuptime (9) in ARP and ND.

Implement a new sysctl (2) net.inet6.icmp6.nd6_queued that shows the number of packets waiting for a ND6 response.

TCP segmented offload (TSO) and TCP large receive offload (LRO) are supported.

PF firewall improvements: optimize DIOCGETRULE requests to improve performance when pfctl (8) acquires pf (4) rules from the kernel.

Relax the implementation of pass all rules to allow all kinds of neighbor advertisements.

Fixed an issue where there was no checksum due to hardware unloading when locally generated IP packets were redirected to user space.

Security improvements: includes support for IBT, BTI, and PAC to enhance control flow integrity.

Memory allocation improvement: close the shutdown (8) program and allow only members of the _ shutdown group to execute to reduce the permissions of the operator group.

Use unveil (2) to restrict file system access to patch (1).

Several changes in the network stack, including support for TSO and LRO.

New pf (4) firewall features and performance improvements.

Security enhancements such as IBT, BTI, and PAC are enabled to improve control flow integrity.

Referenc

OpenBSD 7.4

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