Re: Stuck CLOSED sockets / sshd / zombies...
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On Wed, Apr 09, 2014 at 07:48:19AM +0100, Karl Pielorz wrote:
>=20
>=20
> --On 9 April 2014 00:23:19 +0300 Konstantin Belousov <kostikbel@gmail.com=
>=20
> wrote:
>=20
> > Ok, so the patch sort of worked, but your rtld does not have debugging
> > information for compiled .c files. Please, in the patched tree, do
> > the following:
> ...
> > make DEBUG_FLAGS=3D-g DEBUG=3D-DDEBUG
> ...
>=20
> I only used 'DEBUG_FLAGS=3D-g' the first time round, I've redone now with=
=20
> 'DEBUG=3D-DDEBUG' now:
>=20
>=20
> "
> [Switching to LWP 100218]
> 0x00000008038ea89c in __error () from /lib/libthr.so.3
> (gdb) bt
> #0 0x00000008038ea89c in __error () from /lib/libthr.so.3
> #1 0x00000008038e104f in __thr_rwlock_rdlock (rwlock=3D0x803af9480,=20
> flags=3D<value optimized out>, tsp=3D<value optimized out>)
> at /usr/src/lib/libthr/thread/thr_umtx.c:277
> #2 0x00000008038e821c in _thr_rtld_rlock_acquire (lock=3D0x803af9480) at=
=20
> atomic.h:143
> #3 0x000000080064f9a2 in _rtld_get_stack_prot () from /libexec/ld-elf.so=
=2E1
> #4 0x00000008006498c9 in r_debug_state () from /libexec/ld-elf.so.1
> #5 0x00000008006470cd in .text () from /libexec/ld-elf.so.1
> #6 0x000000000041072c in grace_alarm_handler (sig=3D-17504) at=20
> /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/sshd.c:378
> #7 <signal handler called>
> #8 0x00000008038ea89c in __error () from /lib/libthr.so.3
> #9 0x00000008038e104f in __thr_rwlock_rdlock (rwlock=3D0x803af9480,=20
> flags=3D<value optimized out>, tsp=3D<value optimized out>)
> at /usr/src/lib/libthr/thread/thr_umtx.c:277
> #10 0x00000008038e821c in _thr_rtld_rlock_acquire (lock=3D0x803af9480) at=
=20
> atomic.h:143
> #11 0x000000080064f9a2 in _rtld_get_stack_prot () from /libexec/ld-elf.so=
=2E1
> #12 0x00000008006498c9 in r_debug_state () from /libexec/ld-elf.so.1
> #13 0x00000008006470cd in .text () from /libexec/ld-elf.so.1
> #14 0x000000000042f9dd in sshpam_sigchld_handler (sig=3D<value optimized=
=20
> out>) at=20
> /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/auth-pam.c:152
> #15 <signal handler called>
> #16 0x0000000800653aea in _rtld_atfork_post () from /libexec/ld-elf.so.1
> #17 0x000000080064a835 in dlclose () from /libexec/ld-elf.so.1
> #18 0x000000080064a1eb in r_debug_state () from /libexec/ld-elf.so.1
> #19 0x0000000800edd121 in openpam_clear_chains () from /usr/lib/libpam.so=
=2E5
> #20 0x0000000800edd0bc in openpam_clear_chains () from /usr/lib/libpam.so=
=2E5
> #21 0x0000000800edd0bc in openpam_clear_chains () from /usr/lib/libpam.so=
=2E5
> #22 0x0000000800edd061 in openpam_clear_chains () from /usr/lib/libpam.so=
=2E5
> #23 0x0000000800ed99e7 in pam_end () from /usr/lib/libpam.so.5
> #24 0x000000000042e15d in sshpam_cleanup () at=20
> /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/auth-pam.c:614
> #25 0x000000000041d58f in do_cleanup (authctxt=3D0x80401a600) at=20
> /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/session.c:2732
> #26 0x000000000041064f in ssh_cleanup_exit (i=3D255) at=20
> /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/sshd.c:2545
> #27 0x0000000000428f83 in mm_request_receive (sock=3D<value optimized out=
>,=20
> m=3D<value optimized out>)
> at=20
> /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/monitor_wrap.c:153
> #28 0x0000000000427e26 in monitor_read (pmonitor=3D0x804022220,=20
> ent=3D0x6465a0, pent=3D0x7fffffffd0c0)
> at /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/monitor.c:593
> #29 0x0000000000427b49 in monitor_child_preauth (_authctxt=3D<value=20
> optimized out>, pmonitor=3D0x804022220)
> at /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/monitor.c:387
> #30 0x000000000040fd15 in main (ac=3D<value optimized out>, av=3D<value=
=20
> optimized out>) at=20
> /usr/src/secure/usr.sbin/sshd/../../../crypto/openssh/sshd.c:679
> "
>=20
> At a quick/untrained glance the output doesn't look any different? :(
Hm, I think my instructions were flawed, you have to install with
DEBUG_FLAGS as well:
make install DEBUG_FLAGS=3D-g
You do not need to re-run the tests if rtld did not changed after
the installation. Reinstall and get the backtrace again, please.
--BhxIwg67zh/LWMpM
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