Date: Tue, 08 Apr 2014 10:04:24 +0100 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: Stuck CLOSED sockets / sshd / zombies... Message-ID: <9647C5438B5CD4A3058AB1A2@Mail-PC.tdx.co.uk> In-Reply-To: <201404071148.10157.jhb@freebsd.org> References: <3FE645E9723756F22EF901AE@Mail-PC.tdx.co.uk> <201404041613.09808.jhb@freebsd.org> <2C5B099DE2229F0E8D82D8C8@Mail-PC.tdx.co.uk> <201404071148.10157.jhb@freebsd.org>
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--On 07 April 2014 11:48 -0400 John Baldwin <jhb@freebsd.org> wrote: > Ok, do you have a matching /usr/src on the boxes in question? If so, > please do this: > > cd /usr/src/lib/libc > make DEBUG_FLAGS=-g all install That just installs stuff, not rebuild it right? (Looks to have installed non-stripped versions?). > Then re-run the scan to get a stuck sshd. Once that happens, please > attach to the top-most stock sshd (the one in "urdlck") with gdb > (gdb /usr/sbin/sshd <pid>) and run 'bt' and reply with the output. Ok, that gives: " (gdb) bt #0 0x00000008038ea89c in _umtx_op_err () from /lib/libthr.so.3 #1 0x00000008038e104f in __thr_rwlock_rdlock () from /lib/libthr.so.3 #2 0x00000008038e821c in _thr_rtld_init () from /lib/libthr.so.3 #3 0x000000080064f9a2 in _rtld_get_stack_prot () from /libexec/ld-elf.so.1 #4 0x00000008006498c9 in r_debug_state () from /libexec/ld-elf.so.1 #5 0x00000008006470cd in .text () from /libexec/ld-elf.so.1 #6 0x0000000000000246 in ?? () #7 0x0000000000000000 in ?? () " -Karl
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