In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/erdma: Fix CEQ tasklet use-after-free on removal<\/p>\n
Each CEQ interrupt handler only schedules eqc->tasklet. The tasklet calls
\nerdma_ceq_completion_handler(), which reads the DMA-coherent EQ ring
\nthrough get_next_valid_eqe() and updates eq->dbrec through notify_eq().<\/p>\n
erdma_ceqs_uninit() frees each CEQ IRQ and then destroys its EQ.
\nfree_irq() prevents another hard IRQ and waits for an in-flight handler,
\nbut it does not drain a tasklet that the handler already scheduled. The
\ntasklet can therefore access eq->qbuf or eq->dbrec after
\nerdma_eq_destroy() frees them.<\/p>\n
Clearing ceq_cb->ready does not synchronize with a tasklet that already
\npassed the check at the start of erdma_ceq_completion_handler().<\/p>\n
Kill the tasklet after free_irq(), when no handler can schedule it again,
\nand before erdma_ceq_uninit_one() releases the EQ buffers.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
RDMA\/erdma: Fix CEQ tasklet use-after-free on removal<\/p>\n
Each CEQ interrupt handler only schedules eqc->tasklet. The tasklet calls
\ner<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-25883","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/25883","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=25883"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=25883"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=25883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}