In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot<\/p>\n
Since the hardware rfkill polling was introduced, arm64 platforms can
\npanic with an asynchronous SError during warm reboot:<\/p>\n
SError Interrupt on CPU8, code 0x00000000be000011 — SError
\n Workqueue: events_power_efficient rfkill_poll [rfkill]
\n rtw89_pci_ops_read8+0x94\/0x160 [rtw89_pci]
\n rtw89_core_rfkill_poll+0x50\/0x1e0 [rtw89_core]
\n rtw89_ops_rfkill_poll+0x40\/0x68 [rtw89_core]
\n ieee80211_rfkill_poll+0x3c\/0x70 [mac80211]
\n cfg80211_rfkill_poll+0x40\/0x2a0 [cfg80211]
\n rfkill_poll+0x30\/0x88 [rfkill]
\n Kernel panic – not syncing: Asynchronous SError Interrupt<\/p>\n
On the reboot path the kernel only runs device_shutdown(), which calls
\neach driver’s .shutdown callback; .remove is not invoked. The rtw89 PCI
\ndriver had no .shutdown callback, so nothing stopped the rfkill polling
\nwork while the platform was tearing the PCIe link down. Once the link
\nis gone, the next MMIO read from the poll handler targets a
\nnon-responding device and is reported as a fatal asynchronous SError on
\narm64.<\/p>\n
Add rtw89_pci_shutdown(), wired to all rtw89 PCI device drivers, which
\nsets a new RTW89_FLAG_SHUTDOWN flag (mirroring the USB
\nRTW89_FLAG_UNPLUGGED pattern). When the flag is set,
\nrtw89_ops_rfkill_poll() returns early, so no MMIO read is issued to the
\nchip after shutdown begins and the SError no longer occurs.<\/p>\n
This does not call the full .remove path from .shutdown, to keep the
\nshutdown handler minimal and avoid running the non-idempotent teardown
\ntwice.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
wifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot<\/p>\n
Since the hardware rfkill polling was introduced, arm64 <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21272","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21272","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=21272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}