In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
i3c: mipi-i3c-hci: Fix race in i3c_hci_addr_to_dev()<\/p>\n
i3c_hci_addr_to_dev() walks bus->devs.i3c, which is protected by
\nbus.lock (rwsem). However, it is invoked from the MIPI I3C HCI IRQ
\nhandler, which cannot take bus.lock. This allows concurrent device
\naddition\/removal in the I3C core to modify the list while it is being
\ntraversed, potentially leading to use-after-free or crashes.<\/p>\n
Remove the dependency on the bus device list and introduce a dedicated
\nlookup table. Add an ibi_devs[] array indexed by DAT entry, maintained
\nunder hci->lock. Update the array when IBIs are enabled or disabled,
\nso that it always reflects the set of devices allowed to generate IBIs.
\nAlso update when IBIs are freed, to cover the corner case when an IBI is
\nfreed without first being disabled (e.g. oldedev in
\ni3c_master_add_i3c_dev_locked()).<\/p>\n
Move i3c_hci_addr_to_dev() into core.c, reimplement it using the new
\narray, and add a lockdep assertion to enforce that hci->lock is held
\nby callers.<\/p>\n
Demote a message in PIO and DMA IBI handling, from an error to a debug
\nmessage, because there is a race window when the condition can arise
\nnormally.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
i3c: mipi-i3c-hci: Fix race in i3c_hci_addr_to_dev()<\/p>\n
i3c_hci_addr_to_dev() walks bus->devs.i3c, which is protected by
\nbus.lock (rw<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7115","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7115","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7115"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7115"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}