Fascination About smm prep
Fascination About smm prep
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Failure to properly synchronize user's permissions in UAA in Cloud Foundry Foundation v40.17.0 , possibly leading to customers retaining accessibility rights they ought to not have. This could allow for them to carry out functions beyond their supposed permissions.
previous to dedicate 45bf39f8df7f ("USB: Main: Do not maintain gadget lock while looking through the "descriptors" sysfs file") this race could not take place, since the routines have been mutually distinctive due to the gadget locking. taking away that locking from read_descriptors() exposed it on the race. The ultimate way to deal with the bug is to help keep hub_port_init() from changing udev->descriptor after udev has actually been initialized and registered. motorists assume the descriptors stored from the kernel to become immutable; we should not undermine this expectation. the truth is, this change should have been made way back. So now hub_port_init() will take yet another argument, specifying a buffer through which to store the product descriptor it reads. (If udev has not still been initialized, the buffer pointer will be NULL after which hub_port_init() will store the gadget descriptor in udev as prior to.) This eliminates the info race accountable for the out-of-bounds go through. The changes to hub_port_init() appear much more comprehensive than they really are, because of indentation adjustments ensuing from an try and stay clear of creating to other portions of the usb_device composition following it has been initialized. Similar changes needs to be designed to your code that reads the BOS descriptor, but which can be taken care of in a independent patch later on. This patch is adequate to repair the bug identified by syzbot.
So it is vital to carry that mutex. in any other case a sysfs examine can cause an oops. Commit 17f09d3f619a ("SUNRPC: Verify Should the xprt is related right before handling sysfs reads") appears to try to repair this issue, nonetheless it only narrows the race window.
It employs "page_mapcount(web page)" to decide if a COW site really should be NUMA-secured or not, and that makes Totally no feeling. the quantity of mappings a website page has is irrelevant: not merely does GUP get yourself a reference to the webpage as in Oded's case, but the opposite mappings migth be paged out and the only real reference to them could be during the page count. given that we must always never try and NUMA-harmony a site that we can't move anyway as a consequence of other references, just correct the code to utilize 'page_count()'. Oded confirms that that fixes his issue. Now, this does imply that something in 7 saum improved NUMA balancing ends up shifting web site protections (in addition to the plain considered one of making the page inaccessible to get the NUMA faulting info). Otherwise the COW simplification would not subject - since performing the GUP within the web site would make sure It can be writable. The cause of that authorization modify can be very good to determine as well, since it clearly leads to spurious COW functions - but fixing the nonsensical check that just occurred to operate before is obviously the CorrectThing(tm) to perform No matter.
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nonetheless the new code I included will still erroneously access it soon after it was freed. established 'failure=Fake' In cases like this to avoid the entry, all knowledge was by now freed in any case.
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FutureNet NXR series, VXR series and WXR series furnished by Century units Co., Ltd. contain an Energetic debug code vulnerability. If a user who is familiar with how to make use of the debug operate logs in to your merchandise, the debug functionality might be used and an arbitrary OS command could be executed.
An optional function of PCI MSI referred to as "Multiple Message" lets a device to employ various consecutive interrupt vectors. in contrast to for MSI-X, the organising of these consecutive vectors demands to occur all in a single go.
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So a similar therapy has to be placed on all DSA change motorists, which is: either use devres for both of those the mdiobus allocation and registration, or Will not use devres at all. The bcm_sf2 driver has the code structure in place for orderly mdiobus removal, so just substitute devm_mdiobus_alloc() with the non-devres variant, and add manual free of charge the place necessary, to make certain that we do not Enable devres absolutely free a nevertheless-registered bus.
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