On Fri, Mar 23, 2018 at 11:50:55AM +0800, Jiaxun Yang wrote:

? 2018-03-22?? 22:21 +0000?James Hogan???

quoted

Also I think it worth mentioning in the commit message the MIPS
configuration you hit this with, presumably a Loongson one? For me
decompress_kernel() gets a stack guard on loongson3_defconfig, but
not
malta_defconfig or malta_defconfig + 64-bit. I presume its sensitive
to
the compiler inlining stuff into decompress_kernel() or something
such
that it suddenly qualifies for a stack guard.

Have you tested with CONFIG_CC_STACKPROTECTOR_STRONG=y ?

Yes. for malta_defconfig I could only reproduce by adding an array to
decompress_kernel() so that it would get the guard.

Cheers
James
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