The Ultimate Guide To 2smr
The Ultimate Guide To 2smr
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This patch fixes this by utilizing the open_how struct that we store within the audit_context with audit_openat2_how(). unbiased of the patch, Richard man Briggs posted an identical patch on the audit mailing record about forty minutes following this patch was posted.
matrix-rust-sdk is surely an implementation of the Matrix customer-server library in Rust. The `UserIdentity::is_verified()` method in the matrix-sdk-copyright crate just before Variation 0.7.two does not bear in mind the verification status with the person's individual identification whilst undertaking the Check out and may Because of this return a worth contrary to what's implied by its title and documentation. If your method is utilised to come to a decision whether or not to complete sensitive operations toward a user identification, a malicious homeserver could manipulate the outcome in an effort to make the identification appear reliable.
ahead of commit 45bf39f8df7f ("USB: Main: Really don't hold product lock although reading through the "descriptors" sysfs file") this race couldn't happen, as the routines were being mutually special because of the unit locking. Removing that locking from read_descriptors() exposed it to your race. The simplest way to take care of the bug is to help keep hub_port_init() from switching udev->descriptor once udev is initialized and registered. Drivers anticipate the descriptors stored from the kernel to generally be immutable; we mustn't undermine this expectation. the truth is, this variation should have been made way back. So now hub_port_init() will just take an extra argument, specifying a buffer through which to store the unit descriptor it reads. (If udev hasn't however been initialized, the buffer pointer will be NULL and then hub_port_init() will store the product descriptor in udev as just before.) This removes the data race liable for the out-of-bounds read. The changes to hub_port_init() show up a lot more extensive than they really are, on account of indentation adjustments resulting from an attempt to stay away from crafting to other aspects of the usb_device construction 0mq after it has been initialized. comparable changes should be built on the code that reads the BOS descriptor, but that may be handled in a individual patch down the road. This patch is ample to repair the bug located by syzbot.
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It makes use of "page_mapcount(website page)" to determine if a COW web page need to be NUMA-protected or not, and that makes Completely no perception. The number of mappings a page has is irrelevant: not just does GUP receive a reference to the webpage as in Oded's case, but the other mappings migth be paged out and the only real reference to them might be in the page depend. due to the fact we should always never attempt to NUMA-stability a page that we will not move in any case as a result of other references, just resolve the code to utilize 'page_count()'. Oded confirms that that fixes his challenge. Now, this does suggest that one thing in NUMA balancing winds up shifting site protections (besides the obvious certainly one of making the webpage inaccessible to get the NUMA faulting information). normally the COW simplification wouldn't subject - considering the fact that accomplishing the GUP to the website page would make sure It can be writable. the reason for that authorization change would be very good to figure out also, because it Evidently ends in spurious COW activities - but correcting the nonsensical check that just transpired to work right before is clearly the CorrectThing(tm) to perform No matter.
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while in the Linux kernel, the following vulnerability has actually been fixed: mm: Will not make an effort to NUMA-migrate COW webpages that have other utilizes Oded Gabbay studies that enabling NUMA balancing will cause corruption with his Gaudi accelerator test load: "All the details are within the bug, but The underside line is usually that in some way, this patch leads to corruption when the numa balancing feature is enabled AND we do not use process affinity AND we use GUP to pin webpages so our accelerator can DMA to/from procedure memory. Either disabling numa balancing, employing process affinity to bind to particular numa-node or reverting this patch results in the bug to disappear" and Oded bisected The problem to dedicate 09854ba94c6a ("mm: do_wp_page() simplification"). Now, the NUMA balancing should not really be changing the writability of the page, and as such should not subject for COW. But it seems it does. Suspicious. having said that, irrespective of that, the problem for enabling NUMA faults in change_pte_range() is nonsensical.
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The vulnerability makes it possible for an unauthenticated attacker to browse arbitrary information and facts in the database.
A privilege escalation vulnerability exists within the affected products which could make it possible for a destructive consumer with fundamental privileges to accessibility features which really should only be accessible to end users with administrative stage privileges.
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