In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()<\/p>\n
When dma_device_put() drops the last reference on chan->device->ref,
\ndma_device_release() runs and may free the dma_device along with its
\nchannels.<\/p>\n
dma_chan_put() then still reads chan->device->owner via
\ndma_chan_to_owner() for the trailing module_put(). KASAN catches it:<\/p>\n
\tslab-use-after-free in dma_chan_put+0x3e6\/0x4c0
\n\tRead of size 8 by task insmod\/6319
\n\tFreed by task 6319:
\n\t kfree+0x225\/0x470
\n\t dma_chan_put+0x395\/0x4c0
\n\t dmaengine_put+0xf8\/0x160<\/p>\n
Cache the module owner in dma_chan_put() before the put so the trailing
\nmodule_put() does not need chan->device.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dmaengine: fix use-after-free in dma_chan_put() and dma_release_channel()<\/p>\n
When dma_device_put() drops the last reference on chan-><\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-33412","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/33412","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=33412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=33412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=33412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}