In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
s390\/percpu: Fix MVIY_PERCPU() with older binutils<\/p>\n
Commit a737737cdb9c (“s390\/percpu: Infrastructure for more efficient
\nthis_cpu operations”) introduced MVIY_PERCPU(), which stringifies
\narguments that are already C string literals. This generates an
\nassembler macro invocation with whitespace-separated quoted arguments:<\/p>\n
GEN_MVIY “459712” “%r3”<\/p>\n
GNU as versions prior to binutils 2.39 drop the separating whitespace
\nbetween quoted macro arguments during input scrubbing. They
\nconsequently parse the invocation as a single argument and emit
\nrepeated warnings:<\/p>\n
Warning: missing closing `”‘<\/p>\n
The .ifc in GEN_MVIY never matches and GNU as exits successfully
\nwithout emitting the mviy instruction. As a result, the interrupted
\nper-CPU sequence is not marked in lowcore and the exception return
\npath cannot repair the per-CPU address register after migration.<\/p>\n
All MVIY_PERCPU() callers pass C string literals. Use them directly
\nand separate the assembler macro arguments with an explicit comma. The
\nresulting invocation is:<\/p>\n
GEN_MVIY 459712, %r3<\/p>\n
This form is unambiguous for GNU as and LLVM’s integrated assembler.
\nThis behavior was fixed in GNU as from binutils 2.39, but Linux
\nsupports binutils 2.30.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
s390\/percpu: Fix MVIY_PERCPU() with older binutils<\/p>\n
Commit a737737cdb9c (“s390\/percpu: Infrastructure for more efficient
\nthis_cpu o<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21381","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21381","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=21381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}