The following crash happens reliably on this amd64-current machine, dmesg below.
After roughly 76M download via ftp, the download stalls (and doesn't continue even after leaving it for hours). On aborting with ^C, ftp dumps core. The precise number of downloaded bytes varies by about 1M. I first ran into this crash about a month ago and forgot about it until it happened again. I rebuilt ftp with DEBUG="-g -O0" and reproduced it with a backtrace below. $ obj/ftp -V ftp://openbsd.cs.fau.de/pub/OpenBSD/snapshots/amd64/install59.iso install59.iso 33% |***************************** | 76328 KB - stalled -^C receive aborted waiting for remote to finish abort. ftp: abort: Broken pipe Segmentation fault (core dumped) $ gdb obj/ftp ftp.core GNU gdb 6.3 Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "amd64-unknown-openbsd5.9"... Core was generated by `ftp'. Program terminated with signal 11, Segmentation fault. Loaded symbols for /usr/obj/usr.bin/ftp/ftp Reading symbols from /usr/lib/libedit.so.5.2...done. Loaded symbols for /usr/lib/libedit.so.5.2 Reading symbols from /usr/lib/libcurses.so.14.0...done. Loaded symbols for /usr/lib/libcurses.so.14.0 Reading symbols from /usr/lib/libutil.so.12.1...done. Loaded symbols for /usr/lib/libutil.so.12.1 Reading symbols from /usr/lib/libtls.so.10.0...done. Loaded symbols for /usr/lib/libtls.so.10.0 Reading symbols from /usr/lib/libssl.so.38.0...done. Loaded symbols for /usr/lib/libssl.so.38.0 Reading symbols from /usr/lib/libcrypto.so.37.0...done. Loaded symbols for /usr/lib/libcrypto.so.37.0 Reading symbols from /usr/lib/libc.so.86.0...done. Loaded symbols for /usr/lib/libc.so.86.0 Reading symbols from /usr/libexec/ld.so...done. Loaded symbols for /usr/libexec/ld.so #0 __vfprintf (fp=0x0, fmt0=0x1ac876023993 "%cABOR\r\n", ap=0x7f7ffffe0f10) at /usr/src/lib/libc/stdio/vfprintf.c:459 459 _SET_ORIENTATION(fp, -1); (gdb) bt #0 __vfprintf (fp=0x0, fmt0=0x1ac876023993 "%cABOR\r\n", ap=0x7f7ffffe0f10) at /usr/src/lib/libc/stdio/vfprintf.c:459 #1 0x00001acaa7545b4e in *_libc_vfprintf (fp=0x0, fmt0=0x1ac876023993 "%cABOR\r\n", ap=0x7f7ffffe0f10) at /usr/src/lib/libc/stdio/vfprintf.c:262 #2 0x00001acaa753f256 in *_libc_fprintf (fp=Variable "fp" is not available. ) at /usr/src/lib/libc/stdio/fprintf.c:44 #3 0x00001ac875f1954a in abort_remote (din=0x1acaa7995230) at /usr/src/usr.bin/ftp/ftp.c:2068 #4 0x00001ac875f16a39 in recvrequest (cmd=0x1ac876024294 "RETR", local=0x1aca91880980 "install59.iso", remote=0x1aca99f571b4 "install59.iso", lmode=0x1ac876024255 "w", printnames=1, ignorespecial=1) at /usr/src/usr.bin/ftp/ftp.c:1249 #5 0x00001ac875f1d0f6 in getit (argc=3, argv=0x7f7ffffe1bb0, restartit=0, mode=0x1ac876024255 "w") at /usr/src/usr.bin/ftp/small.c:285 #6 0x00001ac875f1cc92 in get (argc=2, argv=0x7f7ffffe1bb0) at /usr/src/usr.bin/ftp/small.c:202 #7 0x00001ac875f11fe3 in auto_fetch (argc=1, argv=0x7f7ffffe25c8, outfile=0x0) at /usr/src/usr.bin/ftp/fetch.c:1351 #8 0x00001ac875f1a874 in main (argc=1, argv=0x7f7ffffe25c8) at /usr/src/usr.bin/ftp/main.c:467 (gdb) $ dmesg OpenBSD 5.9-current (GENERIC.MP) #1978: Wed Mar 30 12:54:55 MDT 2016 [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 4156157952 (3963MB) avail mem = 4025839616 (3839MB) mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xdae9c000 (63 entries) bios0: vendor LENOVO version "83ET76WW (1.46 )" date 07/05/2013 bios0: LENOVO 4180P41 acpi0 at bios0: rev 2 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP SLIC SSDT SSDT SSDT HPET APIC MCFG ECDT ASF! TCPA SSDT SSDT UEFI UEFI UEFI acpi0: wakeup devices LID_(S3) SLPB(S3) IGBE(S4) EXP4(S4) EHC1(S3) EHC2(S3) HDEF(S4) acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 14318179 Hz acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz, 2691.70 MHz cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC,SENSOR,ARAT cpu0: 256KB 64b/line 8-way L2 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 99MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.1.2, IBE cpu1 at mainbus0: apid 1 (application processor) cpu1: Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz, 2691.26 MHz cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC,SENSOR,ARAT cpu1: 256KB 64b/line 8-way L2 cache cpu1: smt 1, core 0, package 0 cpu2 at mainbus0: apid 2 (application processor) cpu2: Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz, 2691.26 MHz cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC,SENSOR,ARAT cpu2: 256KB 64b/line 8-way L2 cache cpu2: smt 0, core 1, package 0 cpu3 at mainbus0: apid 3 (application processor) cpu3: Intel(R) Core(TM) i7-2620M CPU @ 2.70GHz, 2691.26 MHz cpu3: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,LONG,LAHF,PERF,ITSC,SENSOR,ARAT cpu3: 256KB 64b/line 8-way L2 cache cpu3: smt 1, core 1, package 0 ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63 acpiec0 at acpi0 acpiprt0 at acpi0: bus 0 (PCI0) acpiprt1 at acpi0: bus -1 (PEG_) acpiprt2 at acpi0: bus 2 (EXP1) acpiprt3 at acpi0: bus 3 (EXP2) acpiprt4 at acpi0: bus 5 (EXP4) acpiprt5 at acpi0: bus 13 (EXP5) acpicpu0 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpicpu1 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpicpu2 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpicpu3 at acpi0: C3(350@104 io@0x415), C1(1000@1 halt), PSS acpipwrres0 at acpi0: PUBS, resource for EHC1, EHC2 acpitz0 at acpi0: critical temperature is 98 degC "PNP0C0F" at acpi0 not configured "PNP0C0F" at acpi0 not configured "PNP0C0F" at acpi0 not configured "PNP0C0F" at acpi0 not configured "PNP0C0F" at acpi0 not configured "PNP0C0F" at acpi0 not configured "PNP0C0F" at acpi0 not configured "PNP0C0F" at acpi0 not configured "PNP0C01" at acpi0 not configured acpibtn0 at acpi0: LID_ acpibtn1 at acpi0: SLPB "PNP0A08" at acpi0 not configured "PNP0C02" at acpi0 not configured "PNP0000" at acpi0 not configured "PNP0100" at acpi0 not configured "PNP0103" at acpi0 not configured "PNP0200" at acpi0 not configured "PNP0800" at acpi0 not configured "PNP0C04" at acpi0 not configured "PNP0B00" at acpi0 not configured "PNP0303" at acpi0 not configured "LEN0015" at acpi0 not configured "PNP0C09" at acpi0 not configured acpibat0 at acpi0: BAT0 model "42T4799" serial 7779 type LION oem "SANYO" acpiac0 at acpi0: AC unit online acpithinkpad0 at acpi0 "PNP0C14" at acpi0 not configured "PNP0C14" at acpi0 not configured acpivideo0 at acpi0: VID_ acpivout at acpivideo0 not configured acpivideo1 at acpi0: VID_ cpu0: Enhanced SpeedStep 2691 MHz: speeds: 2701, 2700, 2400, 2200, 2000, 1800, 1600, 1400, 1200, 1000, 800 MHz pci0 at mainbus0 bus 0 pchb0 at pci0 dev 0 function 0 "Intel Core 2G Host" rev 0x09 inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 3000" rev 0x09 drm0 at inteldrm0 inteldrm0: msi inteldrm0: 1600x900 wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation) wsdisplay0: screen 1-5 added (std, vt100 emulation) "Intel 6 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured puc0 at pci0 dev 22 function 3 "Intel 6 Series KT" rev 0x04: ports: 1 com com4 at puc0 port 0 apic 2 int 19: ns16550a, 16 byte fifo com4: probed fifo depth: 0 bytes em0 at pci0 dev 25 function 0 "Intel 82579LM" rev 0x04: msi, address 00:21:cc:6b:ee:df ehci0 at pci0 dev 26 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 16 usb0 at ehci0: USB revision 2.0 uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1 azalia0 at pci0 dev 27 function 0 "Intel 6 Series HD Audio" rev 0x04: msi azalia0: codecs: Conexant CX20590 audio0 at azalia0 ppb0 at pci0 dev 28 function 0 "Intel 6 Series PCIE" rev 0xb4: msi pci1 at ppb0 bus 2 ppb1 at pci0 dev 28 function 1 "Intel 6 Series PCIE" rev 0xb4: msi pci2 at ppb1 bus 3 iwn0 at pci2 dev 0 function 0 "Intel Centrino Ultimate-N 6300" rev 0x35: msi, MIMO 3T3R, MoW, address 00:24:d7:f1:39:fc ppb2 at pci0 dev 28 function 3 "Intel 6 Series PCIE" rev 0xb4: msi pci3 at ppb2 bus 5 ppb3 at pci0 dev 28 function 4 "Intel 6 Series PCIE" rev 0xb4: msi pci4 at ppb3 bus 13 sdhc0 at pci4 dev 0 function 0 "Ricoh 5U822 SD/MMC" rev 0x08: apic 2 int 16 sdmmc0 at sdhc0 ehci1 at pci0 dev 29 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 23 usb1 at ehci1: USB revision 2.0 uhub1 at usb1 "Intel EHCI root hub" rev 2.00/1.00 addr 1 pcib0 at pci0 dev 31 function 0 "Intel QM67 LPC" rev 0x04 ahci0 at pci0 dev 31 function 2 "Intel 6 Series AHCI" rev 0x04: msi, AHCI 1.3 ahci0: port 0: 1.5Gb/s ahci0: port 1: 1.5Gb/s scsibus1 at ahci0: 32 targets sd0 at scsibus1 targ 0 lun 0: <ATA, HITACHI HTS72323, FC4Z> SCSI3 0/direct fixed naa.5000cca582d41ff1 sd0: 305245MB, 512 bytes/sector, 625142448 sectors cd0 at scsibus1 targ 1 lun 0: <HL-DT-ST, DVDRAM GT33N, LT22> ATAPI 5/cdrom removable ichiic0 at pci0 dev 31 function 3 "Intel 6 Series SMBus" rev 0x04: apic 2 int 18 iic0 at ichiic0 spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-10600 SO-DIMM isa0 at pcib0 isadma0 at isa0 pckbc0 at isa0 port 0x60/5 irq 1 irq 12 pckbd0 at pckbc0 (kbd slot) wskbd0 at pckbd0: console keyboard, using wsdisplay0 pms0 at pckbc0 (aux slot) wsmouse0 at pms0 mux 0 wsmouse1 at pms0 mux 0 pms0: Synaptics touchpad, firmware 7.2 pcppi0 at isa0 port 0x61 spkr0 at pcppi0 aps0 at isa0 port 0x1600/31 uhub2 at uhub0 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 uhub3 at uhub1 port 1 "Intel Rate Matching Hub" rev 2.00/0.00 addr 2 vscsi0 at root scsibus2 at vscsi0: 256 targets softraid0 at root scsibus3 at softraid0: 256 targets sd1 at scsibus3 targ 1 lun 0: <OPENBSD, SR CRYPTO, 005> SCSI2 0/direct fixed sd1: 305242MB, 512 bytes/sector, 625136753 sectors root on sd1a (56845c8da732ee7b.a) swap on sd1b dump on sd1b
