Date: Tue, 22 Aug 2017 05:28:36 -0700 From: David Wolfskill <david@catwhisker.org> To: Konstantin Belousov <kostikbel@gmail.com> Cc: current@freebsd.org Subject: Re: SIGSEGV in /bin/sh after r322740 -> r322776 update Message-ID: <20170822122836.GH1130@albert.catwhisker.org> In-Reply-To: <20170822115923.GC1700@kib.kiev.ua> References: <20170822114627.GC1130@albert.catwhisker.org> <20170822115923.GC1700@kib.kiev.ua>
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--JCYGd/UpHK4EX+A4 Content-Type: multipart/mixed; boundary="1n5KrmHTzI9lYhsK" Content-Disposition: inline --1n5KrmHTzI9lYhsK Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Aug 22, 2017 at 02:59:23PM +0300, Konstantin Belousov wrote: > ... > > lldb's notion of the backtrace was fairly non-useful: > > g1-252(11.1-S)[7] lldb -c sh.core > > (lldb) target create --core "sh.core" > > Core file '/home/david/sh.core' (x86_64) was loaded. > > (lldb) bt > > * thread #1, name =3D 'sh', stop reason =3D signal SIGSEGV > > * frame #0: 0x0000000800b6ee08 > > frame #1: 0x0000000800000003 > > (lldb)=20 > I am not sure how to get the interesting information with lldb, > try gdb. freebeast(12.0-C)[11] gdb -c sh.core=20 GNU gdb (GDB) 8.0 [GDB v8.0 for FreeBSD] =2E.. Type "apropos word" to search for commands related to "word". [New LWP 100182] Core was generated by `sh -c cc --version || echo 0.0.0'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x0000000800b6ee08 in ?? () (gdb) bt #0 0x0000000800b6ee08 in ?? () #1 0x0000000000000000 in ?? () (gdb)=20 > Disassemble the code around the faulting %rip. Sorry; I haven't done very much with any debugger other than the one in Perl in ... decades. Checking the gdb docs online, the only reference to "disassembly" reads "23.3.3.22 Disassembly In Guile", which seems rather far off the mark. I'm afraid I'll need a bit more detail. >Also provide the first > 100 lines of verbose dmesg of the boot on the affected machine. Well, a copy of the complete (verbose) dmesg.boot from *yesterday* (r322740) is at <http://www.catwhisker.org/~david/FreeBSD/history/freebeast.12_dmesg.txt>; I grabbed a copy of the dmesg.boot for today, and have attached "head -100" from it to this message. > Is it only /bin/sh which faults ? Well, /bin/csh doesn't seem to be giving me any trouble as I use it interactively. I don't recall seeing evidence that anything that isn't invoking /bin/sh is having a problem; on the other hand, there is a lot of the system I don't normally use. But things like "svn info" work, as does "svnlite info" (big difference there is that former is a port, built under stable/11, while the latter would be part of base). > Does system boot into multiuser ? Yes; it does. But checking /var/log/messages, I see: =2E.. Aug 22 11:13:28 freebeast kernel: da3: Delete methods: <NONE(*),ZERO> Aug 22 11:13:28 freebeast kernel: GEOM: new disk da3 Aug 22 11:13:28 freebeast kernel: (da3:umass-sim0:0:0:3): PREVENT ALLOW MED= IUM REMOVAL not supported. Aug 22 11:13:28 freebeast kernel: re0: link state changed to DOWN Aug 22 11:13:28 freebeast kernel: pid 286 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: pid 293 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: pid 298 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: pid 302 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: re0: link state changed to UP Aug 22 11:13:28 freebeast kernel: pid 307 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: pid 318 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: ubt0 on uhub0 Aug 22 11:13:28 freebeast kernel: ubt0: <Broadcom Corp BCM43142A0, rev 2.00= /1.12, addr 3> on usbus0 Aug 22 11:13:28 freebeast kernel: random: harvesting attach, 8 bytes (4 bit= s) from ubt0 Aug 22 11:13:28 freebeast kernel: pid 327 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: pid 331 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:28 freebeast kernel: WARNING: attempt to domain_add(bluetooth)= after domainfinalize() Aug 22 11:13:28 freebeast kernel: WARNING: attempt to domain_add(netgraph) = after domainfinalize() Aug 22 11:13:28 freebeast lpd[596]: lpd startup: logging=3D0 Aug 22 11:13:28 freebeast kernel: . Aug 22 11:13:28 freebeast ntpd[618]: ntpd 4.2.8p10-a (1): Starting Aug 22 11:13:28 freebeast kernel: pid 572 (nfsd), uid 0: exited on signal 1= 1 (core dumped) Aug 22 11:13:28 freebeast kernel: pid 571 (nfsd), uid 0: exited on signal 1= 1 (core dumped) Aug 22 11:13:29 freebeast kernel: pid 684 (sh), uid 0: exited on signal 11 = (core dumped) Aug 22 11:13:29 freebeast kernel: pid 725 (autounmountd), uid 0: exited on = signal 11 (core dumped) Aug 22 11:27:08 freebeast kernel: pid 810 (csh), uid 1001: exited on signal= 11 (core dumped) Aug 22 11:27:12 freebeast kernel: pid 844 (csh), uid 1001: exited on signal= 11 (core dumped) Aug 22 11:27:12 freebeast kernel: pid 894 (csh), uid 1001: exited on signal= 11 (core dumped) Aug 22 11:27:16 freebeast kernel: pid 928 (csh), uid 1001: exited on signal= 11 (core dumped) Aug 22 11:27:16 freebeast kernel: pid 954 (csh), uid 1001: exited on signal= 11 (core dumped) Aug 22 11:27:16 freebeast kernel: pid 978 (csh), uid 1001: exited on signal= 11 (core dumped) Aug 22 11:27:26 freebeast kernel: pid 1011 (csh), uid 0: exited on signal 1= 1 (core dumped) Aug 22 11:27:26 freebeast kernel: pid 1042 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:26 freebeast kernel: pid 1043 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:26 freebeast kernel: pid 1045 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:26 freebeast kernel: pid 1046 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:27 freebeast kernel: pid 1048 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:27 freebeast kernel: pid 1051 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:27 freebeast kernel: pid 1052 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:27 freebeast kernel: pid 1056 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 11:27:27 freebeast kernel: pid 1059 (sh), uid 0: exited on signal 11= (core dumped) Aug 22 12:05:24 freebeast kernel: pid 1134 (scp), uid 1001: exited on signa= l 11 (core dumped) Aug 22 12:05:46 freebeast kernel: pid 1139 (csh), uid 1001: exited on signa= l 11 (core dumped) which provides some evidence that /bin/csh is also affected. Thanks for your help; sorry I'm so clueless about using gdb. Peace, david --=20 David H. Wolfskill david@catwhisker.org If we wish to eliminate sources of Fake News, start at the top: D. Trump. See http://www.catwhisker.org/~david/publickey.gpg for my public key. --1n5KrmHTzI9lYhsK Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="dmesg.boot_head" Content-Transfer-Encoding: quoted-printable pcm2: + <- nid=3D26 [pin: Line-in (Blue Jack)] [src: line] pcm2: + <- nid=3D29 [beep widget] [src: speaker] pcm2:=20 pcm2: Master Volume (OSS: vol): -65/0dB pcm2: +- ctl 14 (nid 12 out): -65/0dB (88 steps) pcm2: +- ctl 15 (nid 12 in 0): mute pcm2: +- ctl 16 (nid 12 in 1): mute pcm2: +- ctl 17 (nid 13 out): -65/0dB (88 steps) pcm2: +- ctl 18 (nid 13 in 0): mute pcm2: +- ctl 19 (nid 13 in 1): mute pcm2: +- ctl 20 (nid 14 out): -65/0dB (88 steps) pcm2: +- ctl 21 (nid 14 in 0): mute pcm2: +- ctl 22 (nid 14 in 1): mute pcm2: +- ctl 23 (nid 15 out): -65/0dB (88 steps) pcm2: +- ctl 24 (nid 15 in 0): mute pcm2: +- ctl 25 (nid 15 in 1): mute pcm2: +- ctl 26 (nid 20 in ): mute pcm2: +- ctl 27 (nid 21 in ): mute pcm2: +- ctl 28 (nid 22 in ): mute pcm2: +- ctl 29 (nid 23 in ): mute pcm2: +- ctl 36 (nid 27 in ): mute pcm2:=20 pcm2: PCM Volume (OSS: pcm): 0/0dB pcm2: +- ctl 15 (nid 12 in 0): mute pcm2: +- ctl 18 (nid 13 in 0): mute pcm2: +- ctl 21 (nid 14 in 0): mute pcm2: +- ctl 24 (nid 15 in 0): mute pcm2:=20 pcm2: Microphone Volume (OSS: mic): 0/30dB pcm2: +- ctl 1 (nid 7 in 0): -17/30dB (64 steps) + mute pcm2: +- ctl 4 (nid 11 in 0): -34/12dB (32 steps) + mute pcm2: +- ctl 31 (nid 24 out): 0/30dB (4 steps) pcm2:=20 pcm2: Microphone2 Volume (OSS: monitor): 0/30dB pcm2: +- ctl 1 (nid 7 in 0): -17/30dB (64 steps) + mute pcm2: +- ctl 5 (nid 11 in 1): -34/12dB (32 steps) + mute pcm2: +- ctl 33 (nid 25 out): 0/30dB (4 steps) pcm2:=20 pcm2: Line-in Volume (OSS: line): 0/30dB pcm2: +- ctl 1 (nid 7 in 0): -17/30dB (64 steps) + mute pcm2: +- ctl 6 (nid 11 in 2): -34/12dB (32 steps) + mute pcm2: +- ctl 35 (nid 26 out): 0/30dB (4 steps) pcm2:=20 pcm2: Speaker/Beep Volume (OSS: speaker): -17/12dB pcm2: +- ctl 1 (nid 7 in 0): -17/30dB (64 steps) + mute pcm2: +- ctl 9 (nid 11 in 5): -34/12dB (32 steps) + mute pcm2:=20 pcm2: Recording Level (OSS: rec): -17/30dB pcm2: +- ctl 1 (nid 7 in 0): -17/30dB (64 steps) + mute pcm2:=20 pcm2: Input Mix Level (OSS: mix): -17/30dB pcm2: +- ctl 1 (nid 7 in 0): -17/30dB (64 steps) + mute pcm2: +- ctl 16 (nid 12 in 1): mute pcm2: +- ctl 19 (nid 13 in 1): mute pcm2: +- ctl 22 (nid 14 in 1): mute pcm2: +- ctl 25 (nid 15 in 1): mute pcm2:=20 pcm2: Input Monitoring Level (OSS: igain): 0/0dB pcm2: +- ctl 16 (nid 12 in 1): mute pcm2: +- ctl 19 (nid 13 in 1): mute pcm2: +- ctl 22 (nid 14 in 1): mute pcm2: +- ctl 25 (nid 15 in 1): mute pcm2:=20 pcm2: Mixer "vol": pcm2: Mixer "pcm": pcm2: Mixer "speaker": pcm2: Mixer "line": pcm2: Mixer "mic": pcm2: Mixer "mix": pcm2: Mixer "rec": pcm2: Mixer "igain": pcm2: Mixer "ogain": pcm2: Mixer "monitor": pcm2: Soft PCM mixer ENABLED pcm2: Playback channel set is: Front Left, Front Right, Front Center, Low F= requency Effects, Back Left, Back Right, Side Left, Side Right,=20 pcm2: Playback channel matrix is: 7.1 (disconnected) pcm2: Recording channel set is: Front Left, Front Right,=20 pcm2: Recording channel matrix is: 2.0 (disconnected) random: harvesting attach, 8 bytes (4 bits) from pcm2 random: harvesting attach, 8 bytes (4 bits) from hdaa1 random: harvesting attach, 8 bytes (4 bits) from hdacc1 ugen1.1: <Intel EHCI root HUB> at usbus1 ugen0.1: <0x8086 XHCI root HUB> at usbus0 ugen2.1: <Intel EHCI root HUB> at usbus2 ses0 at ahciem0 bus 0 scbus5 target 0 lun 0 ses0: <AHCI SGPIO Enclosure 1.00 0001> SEMB S-E-S 2.00 device ses0: SEMB SES Device uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1 ses0: ada0 at ahcich0 bus 0 scbus0 target 0 lun 0 ada0: <Crucial CT960M500SSD1 MU03> ACS-2 ATA SATA 3.x device ada0: Serial Number 1350095E5057 ada0: 600.000MB/s transfers (SATA 3.x, UDMA6, PIO 8192bytes) ada0: Command Queueing enabled ada0: 915715MB (1875385008 512 byte sectors) ada0: quirks=3D0x2<NCQ_TRIM_BROKEN> GEOM: new disk ada0 uhub1: ada1 at ahcich2 bus 0 scbus2 target 0 lun 0 ada1: <M4-CT512M4SSD2 0309> ACS-2 ATA SATA 3.x device ada1: Serial Number 00000000123209121C23 ada1: 600.000MB/s transfers (SATA 3.x, UDMA5, PIO 8192bytes) --1n5KrmHTzI9lYhsK-- --JCYGd/UpHK4EX+A4 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAEBCgBmBQJZnCN0XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRDQ0I3Q0VGOTE3QTgwMUY0MzA2NEQ3N0Ix NTM5Q0M0MEEwNDlFRTE3AAoJEBU5zECgSe4X/NwH/RLgIvvqjzeEzgvvSgk+g4bU fDILKGv3OsdY8v8GKA672t6UO50JS5BBAwlwpn3nZxssNk84Xc5yuvWhsmAO0xh5 Ltd9udcfoykJ5U8YlNX4vH66Ot5seraK4G0nWm3a0q6oytl3YBKqhB9s6833gpKW nnwETQVK+Q5QqgPuc7YBjk5aDG/b09uSqLPxJUX42nBv7SSAyC/DJ34tCahG0Txy WItPn7tdlB5kmKpEd1iLvK8hmCGU7AYtRArmG/LuHFVH9U6tzxGKUPV0AJ/cUcmz AYGsjSbkgZTvPkGHkaIpJ+s6YE6PuCLft+7seNLwlRZdnBN23k8yNq8dxOdB1qU= =4Qim -----END PGP SIGNATURE----- --JCYGd/UpHK4EX+A4--
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