On Thu, Feb 21, 2019 at 09:24:43AM +0100, Harry Schmalzbauer wrote:
> Am 20.02.2019 um 17:51 schrieb Harry Schmalzbauer:
> > Hello,
> >
> …
> > gdb shows:
> > Core was generated by `/usr/sbin/auditdistd'.
> > Program terminated with signal 11, Segmentation fault.
> > Reading symbols from /lib/libutil.so.9...Reading symbols from
> > /usr/lib/debug//lib/libutil.so.9.debug...done.
> > done.
> > Loaded symbols for /lib/libutil.so.9
> > Reading symbols from /libexec/ld-elf.so.1...Reading symbols from
> > /usr/lib/debug//libexec/ld-elf.so.1.debug...done.
> > done.
> > Loaded symbols for /libexec/ld-elf.so.1
> > #0 memset (dest=0x80056f790, c=0, len=)
> > at
> > /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:5624
> > 5624 ((char *)dest)[i] = c;
> > (gdb) bt
> > #0 memset (dest=0x80056f790, c=0, len=)
> > at
> > /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:5624
> > #1 0x000800235b07 in map_object (fd=3, path=0x800246140
> > "/lib/libcrypto.so.111",
> > sb=0x7fffd4a8)
> > at
> > /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/map_object.c:249
> > #2 0x000800230806 in load_object (name=0x201dba
> > "libcrypto.so.111", fd_u=-1,
> > refobj=0x800248000, flags=)
> > at
> > /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:2493
> > #3 0x000800229972 in _rtld (sp=,
> > exit_proc=0x7fffea30,
> > objp=0x7fffea38)
> > at
> > /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:2315
> > #4 0x000800228019 in .rtld_start ()
> > at
> > /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/amd64/rtld_start.S:39
> > #5 0x in ?? ()
> > Current language: auto; currently minimal
> >
> > Any help highly appreciated.
> >
> > This is with a live CD (amd64), compiled with stable/12 from today (so
> > clang 7.01).
> > The bhyve guest has 2GB hardwired and ran stable/11 beforehand, which
> > compiled the live CD.
> > bhyve host is 11.2. But that shouldn't play a role, does it?
>
> I'm really interested what happens here.
> I built stable/11 in that bhyve guest and updated that guest to
> stable/11 from yesterday.
> To my surpise llvm 7.01 was also merged to stable/11. Thank you for
> that great supprt!
> No problems with any binary in the stable/11 bhyve guest.
>
> Then I built stable/12 in that re-built stable/11 guest.
> As result, again all binaries linked to /lib/libcrypto.so.111 crash
> (signal 11) with the stable/12 iso in the same bhyve guest.
>
> Here the example from ntpq:
> Program terminated with signal 11, Segmentation fault.
> Reading symbols from /lib/libedit.so.7...Reading symbols from
> /usr/lib/debug//lib/libedit.so.7.debug...done.
> done.
> Loaded symbols for /lib/libedit.so.7
> Reading symbols from /lib/libm.so.5...Reading symbols from
> /usr/lib/debug//lib/libm.so.5.debug...done.
> done.
> Loaded symbols for /lib/libm.so.5
> Reading symbols from /libexec/ld-elf.so.1...Reading symbols from
> /usr/lib/debug//libexec/ld-elf.so.1.debug...done.
> done.
> #0 memset (dest=0x8005ef790, c=0, len=) at
> /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:5624
> 5624 ((char *)dest)[i] = c;
> (gdb) bt
> #0 memset (dest=0x8005ef790, c=0, len=) at
> /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:5624
> #1 0x00080025db07 in map_object (fd=3, path=0x80026e1a0
> "/lib/libcrypto.so.111", sb=0x7fffd4c8) at
> /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/map_object.c:249
> #2 0x000800258806 in load_object (name=0x201b40 "libcrypto.so.111",
> fd_u=-1, refobj=0x80027, flags=) at
> /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:2493
> #3 0x000800251972 in _rtld (sp=,
> exit_proc=0x7fffea50, objp=0x7fffea58) at
> /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/rtld.c:2315
> #4 0x000800250019 in .rtld_start () at
> /usr/local/share/deploy-tools/RELENG_12/src/libexec/rtld-elf/amd64/rtld_start.S:39
> #5 0x in ?? ()
>
> So please correct me if I'm comletely wrong, but the problem here seems
> to be reproducably rtld-elf related.
> Unfortunately I don't know anything about object files and linkers and
> the related fundamental stuff.
If you do not know about linkers, why do you claim that the problem
is related to rtld ?
> But maybe someone else has an idea what's going wrong here?
The fault happens during zeroing of bss. Most likely it is due to some
strangeness of the object being loaded. For diagnostic, show
the output of "readelf -a libcrypto.so.111".
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