In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/smc: do not dereference an unset send buffer on the SMC-D teardown path<\/p>\n
smc_close_stream_wait() calls smc_tx_prepared_sends() from inside its
\nsk_wait_event() condition, and sk_wait_event() evaluates that condition
\nonce with the socket lock released. smcd_buf_detach() clears
\nconn->sndbuf_desc from smc_conn_kill() under lock_sock(), so a link group
\nterminating while a socket waits there leaves the helper dereferencing
\nNULL, faulting out of close(). SIOCOUTQ reads the field by hand, and
\nsmc_close_cancel_work() drops the lock across two cancel_*_sync() calls.<\/p>\n
Sample the pointer once in the helper, report nothing prepared while it is
\nunset, and bound the ioctl the same way. The receive tasklet dereferences
\nthe field directly in smc_cdc_msg_recv_action(), not through this helper;
\n1\/2 is what keeps it from running that late.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/smc: do not dereference an unset send buffer on the SMC-D teardown path<\/p>\n
smc_close_stream_wait() calls smc_tx_prepared_sends() <\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21317","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21317","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=21317"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21317"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21317"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}