Messages in this thread | | | From | Song Liu <> | Date | Fri, 23 Oct 2020 14:15:53 -0700 | Subject | Re: [LTP] mmstress[1309]: segfault at 7f3d71a36ee8 ip 00007f3d77132bdf sp 00007f3d71a36ee8 error 4 in libc-2.27.so[7f3d77058000+1aa000] |
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On Fri, Oct 23, 2020 at 10:51 AM Linus Torvalds <torvalds@linux-foundation.org> wrote: > > On Fri, Oct 23, 2020 at 10:00 AM Naresh Kamboju > <naresh.kamboju@linaro.org> wrote: > > > > [Old patch from yesterday] > > > > After applying your patch on top on linux next tag 20201015 > > there are two observations, > > 1) i386 build failed. please find build error build > > Yes, this was expected. That patch explicitly only works on x86-64, > because 32-bit needs the double register handling for 64-bit values > (mainly loff_t). > > > 2) x86_64 kasan test PASS and the reported error not found. > > Ok, good. That confirms that the problem you reported is indeed the > register allocation. > > The patch I sent an hour ago (the one based on Rasmus' one from > yesterday) should fix things too, and - unlike yesterday's - work on > 32-bit. > > But I'll wait for confirmation (and hopefully a sign-off from Rasmus > so that I can give him authorship) before actually committing it. > > Linus
My test vm failed to boot since
commit d55564cfc222326e944893eff0c4118353e349ec x86: Make __put_user() generate an out-of-line call
The patch also fixed it.
Thanks! Song
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