Re: [gentoo-user] kernel 4.9.77 error segfault in compile.

[Corbin Bird]

On 01/22/2018 11:56 AM, Rich Freeman wrote:
> On Mon, Jan 22, 2018 at 12:11 PM, Alexander Kapshuk
> <alexander.kapshuk@×××××.com> wrote:
>> On Mon, Jan 22, 2018 at 5:51 PM, Corbin Bird <corbinbird@×××××××.net> wrote:
>>> Anyone else getting this error? ( kernel 4.9.77 )
>>>
>>>>   CC      fs/ext4/mballoc.o
>>>>   CC      fs/ext4/block_validity.o
>>>>   CC      fs/ext4/move_extent.o
>>>>   CC      fs/ext4/mmp.o
>>>>   CC      fs/ext4/indirect.o
>>>> fs/ext4/indirect.o: warning: objtool: ext4_clear_blocks()+0x242: can't
>>>> find jump dest instruction at .text+0x56c
>>>>   CC      fs/ext4/extents_status.o
>>>> /bin/sh: line 1: 31735 Segmentation fault      ./tools/objtool/objtool
>>>> check "fs/ext4/extents_status.o"
>>>> make[2]: *** [scripts/Makefile.build:294: fs/ext4/extents_status.o]
>>>> Error 139
>>>> make[1]: *** [scripts/Makefile.build:544: fs/ext4] Error 2
>>>> make: *** [Makefile:995: fs] Error 2
>>> Corbin
>>>
>>>
>> Based on the output you supplied, objtool isn't happy with
>> fs/ext4/indirect.o and fs/ext4/extents_status.o.
>> Did you do 'make clean' prior to building the kernel?
>> If you did, it might be worth doing a 'make mrproper' before
>> rebuilding the kernel.
>> Don't forget to back up your .config before running mrproper.
>>
> While this is going to cause a bit more building, I personally tend to
> redirect kernel build output.  I add O=/var/tmp/linux to all my make
> commands, which leaves /usr/src untouched and builds faster besides
> (tmpfs).
>
> The main downsides to this are:
> 1.  Make can't re-use objects from previous builds, so rebuilds will
> go slower.  Though, IMO this is worthwhile if re-using those objects
> causes issues (which I assume is due to imperfect makefiles).
> 2.  When building packages that install kernel modules the prepared
> sources won't exist.  This requires going back and re-preparing them
> (make O=/var/tmp/linux modules_prepare).  For packages like zfs-kmod
> that use Module.symvers this is even more painful as you can only get
> that by rebuilding the whole thing.
>

Tried both approaches ... the results :
> make distclean
> make mrproper
> --> copy over .config
> make modules_prepare
> make && make modules_install
>
>   CC      fs/ext4/block_validity.o
>   CC      fs/ext4/move_extent.o
>   CC      fs/ext4/mmp.o
>   CC      fs/ext4/indirect.o
> fs/ext4/indirect.o: warning: objtool: ext4_clear_blocks()+0x242: can't
> find jump dest instruction at .text+0x56c
>   CC      fs/ext4/extents_status.o
> /bin/sh: line 1: 24095 Segmentation fault      ./tools/objtool/objtool
> check "fs/ext4/extents_status.o"
> make[2]: *** [scripts/Makefile.build:294: fs/ext4/extents_status.o]
> Error 139
> make[1]: *** [scripts/Makefile.build:544: fs/ext4] Error 2
> make: *** [Makefile:995: fs] Error 2
>
>
Try 2 :
>
> make distclean
> make mrproper
> --> copy over .config
> make O=/var/tmp/linux modules_prepare
> make O=/var/tmp/linux && make O=/var/tmp/linux modules_install
>
>   CC      fs/ext4/move_extent.o
>   CC      fs/ext4/mmp.o
>   CC      fs/ext4/indirect.o
> fs/ext4/indirect.o: warning: objtool: ext4_clear_blocks()+0x242: can't
> find jump dest instruction at .text+0x56c
>   CC      fs/ext4/extents_status.o
> /bin/sh: line 1: 21028 Segmentation fault      ./tools/objtool/objtool
> check "fs/ext4/extents_status.o"
> make[3]: *** [/usr/src/linux-4.9.77-gentoo/scripts/Makefile.build:294:
> fs/ext4/extents_status.o] Error 139
> make[2]: *** [/usr/src/linux-4.9.77-gentoo/scripts/Makefile.build:544:
> fs/ext4] Error 2
> make[1]: *** [/usr/src/linux-4.9.77-gentoo/Makefile:995: fs] Error 2
> make[1]: Leaving directory '/var/tmp/linux'
> make: *** [Makefile:150: sub-make] Error 2
Try 2 gave an error warning about needing an 'make mrproper' ... the error :
>
>   CHK     include/config/kernel.release
>   UPD     include/config/kernel.release
>   Using /usr/src/linux-4.9.77-gentoo as source for kernel
>   /usr/src/linux-4.9.77-gentoo is not clean, please run 'make mrproper'
>   in the '/usr/src/linux-4.9.77-gentoo' directory.
> make[1]: *** [/usr/src/linux-4.9.77-gentoo/Makefile:1021: prepare3]
> Error 1
> make[1]: Leaving directory '/var/tmp/linux'
> make: *** [Makefile:150: sub-make] Error 2
So ... I followed directions :
> Darkstar /usr/src/linux # cd /usr/src/linux-4.9.77-gentoo
> Darkstar /usr/src/linux-4.9.77-gentoo # make mrproper
>   CLEAN   scripts/basic
>   CLEAN   scripts/kconfig
>   CLEAN   .config

Still get the same error ...

Corbin