In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dmaengine: fsl-edma: tracing: no ptr dereference during log output<\/p>\n
The fsl edma events store a pointer to a struct fsl_edma_engine in the
\nringbuffer and dereference it when a log entry is printed. At this time,
\nthe pointer may no longer be valid.<\/p>\n
Event injection can be used to trigger a crash:<\/p>\n
$ cd \/sys\/kernel\/tracing
\n$ echo ‘value = 0’ > events\/fsl_edma\/edma_writeb\/inject
\n$ cat trace<\/p>\n
The log output needs only edma->membase. Add a membase field at the end
\nof the event and use the new field for log output. Keep the existing
\nfields for backward compatibility.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
dmaengine: fsl-edma: tracing: no ptr dereference during log output<\/p>\n
The fsl edma events store a pointer to a struct fsl_edma_engine<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24681","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24681","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=24681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}