Date: Mon, 27 Aug 2012 06:13:11 -0700 From: David Wolfskill <david@catwhisker.org> To: stable@freebsd.org Subject: FreeBSD/i386 stable/9 @239722: REDZONE: Buffer underflow detected Message-ID: <20120827131311.GE1442@albert.catwhisker.org>
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I've been tracking stable/9 on a daily basis on one of the slices
of my laptop for a while now, b ut just happened to review the
scrollback on vty0 this morning, and noticed the (hightlighted, though
that doesn't show up in the below cut/paste) whines "REDZONE: Buffer
underflow detected...."
I included a few line before & after to provide some context.
As far as I have been able to tell, it's running OK; still, perhaps
there's something worth chasing down?
The uname -a output is:
FreeBSD g1-227.catwhisker.org 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #228 23=
9646M: Fri Aug 24 04:58:07 PDT 2012 root@g1-227.catwhisker.org:/usr/obj=
/usr/src/sys/CANARY i386
though the GRN there is a little bit misleading, as both kernel &
userland were rebuilt with sources @239722M around 05:00 hrs. this
morning US/Pacific time.
Anyway, here's the cut/paster:
=2E..
Mounting local file systems:.
Setting hostname: localhost.
Starting dhclient.
em0: no link .............. giving up
/etc/rc.d/dhclient: WARNING: failed to start dhclient
wlan0: Ethernet address: 00:21:6a:26:34:c0
Starting wpa_supplicant.
Starting dhclient.
wlan0: no link ......wlan0: link state changed to UP
got link
dhclient: /etc/dhclient-enter-hooks invoked with reason PREINIT
dhclient: Setting hostname from localhost to null string
dhclient: /etc/dhclient-exit-hooks invoked with reason PREINIT
dhclient: reason was PREINIT; no action taken
dhclient: Exiting /etc/dhclient-exit-hooks (PREINIT) with exit_status 0
DHCPREQUEST on wlan0 to 255.255.255.255 port 67
DHCPACK from 172.17.0.1
Expensive timeout(9) function: 0xc0b91b10(0) 0.010922407 s
bound to 172.17.1.227 -- renewal in 43200 seconds.
Starting Network: lo0 em0 iwn0 fwe0 fwip0 ipfw0.
lo0: flags=3D8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
options=3D600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6>
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0xe
inet 127.0.0.1 netmask 0xff000000
nd6 options=3D21<PERFORMNUD,AUTO_LINKLOCAL>
em0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3D4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,T=
SO4,WOL
_MAGIC,VLAN_HWTSO>
ether 00:24:e8:9c:11:0f
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: Ethernet autoselect
status: no carrier
iwn0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
ether 00:21:6a:26:34:c0
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
status: associated
fwe0: flags=3D8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3D8<VLAN_MTU>
ether 4a:4f:c0:37:06:01
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
ch 1 dma -1
fwip0: flags=3D8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
lladdr 4a.4f.c0.0.10.37.6.1.a.2.ff.fe.0.0.0.0
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
ipfw0: flags=3D8801<UP,SIMPLEX,MULTICAST> metric 0 mtu 65536
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
Starting devd.
REDZONE: Buffer underflow detected. 1 byte corrupted before 0xced40080 (429=
49667
96 bytes allocated).
Allocation backtrace:
#0 0xc0ce5fef at redzone_setup+0xcf
#1 0xc0a5a959 at malloc+0x1d9
#2 0xc0a9b200 at devctl_queue_data_f+0x40
#3 0xc0aa066a at devaddq+0x20a
#4 0xc0a9d58c at device_attach+0x46c
#5 0xc0a9e35b at bus_generic_attach+0x2b
#6 0xc0530cf5 at acpi_pci_attach+0x185
#7 0xc0a9d489 at device_attach+0x369
#8 0xc0a9e35b at bus_generic_attach+0x2b
#9 0xc0532e52 at acpi_pcib_attach+0x262
#10 0xc053414f at acpi_pcib_pci_attach+0x9f
#11 0xc0a9d489 at device_attach+0x369
#12 0xc0a9e35b at bus_generic_attach+0x2b
#13 0xc0530cf5 at acpi_pci_attach+0x185
#14 0xc0a9d489 at device_attach+0x369
#15 0xc0a9e35b at bus_generic_attach+0x2b
#16 0xc0532e52 at acpi_pcib_attach+0x262
#17 0xc0533845 at acpi_pcib_acpi_attach+0x2c5
Free backtrace:
#0 0xc0ce62aa at redzone_check+0x1ca
#1 0xc0a5a9a8 at free+0x38
#2 0xc0a9b086 at devread+0x1a6
#3 0xc0a256d7 at giant_read+0x87
#4 0xc096e292 at devfs_read_f+0xc2
#5 0xc0ab6f29 at dofileread+0x99
#6 0xc0ab6b48 at sys_read+0x98
#7 0xc0ddc197 at syscall+0x387
#8 0xc0dc4f51 at Xint0x80_syscall+0x21
REDZONE: Buffer overflow detected. 10 bytes corrupted after 0xced3fe8c (429=
49667
96 bytes allocated).
Allocation backtrace:
#0 0xc0ce5fef at redzone_setup+0xcf
#1 0xc0a5a959 at malloc+0x1d9
#2 0xc0a9b200 at devctl_queue_data_f+0x40
#3 0xc0aa066a at devaddq+0x20a
#4 0xc0a9d58c at device_attach+0x46c
#5 0xc0a9e35b at bus_generic_attach+0x2b
#6 0xc0530cf5 at acpi_pci_attach+0x185
#7 0xc0a9d489 at device_attach+0x369
#8 0xc0a9e35b at bus_generic_attach+0x2b
#9 0xc0532e52 at acpi_pcib_attach+0x262
#10 0xc053414f at acpi_pcib_pci_attach+0x9f
#11 0xc0a9d489 at device_attach+0x369
#12 0xc0a9e35b at bus_generic_attach+0x2b
#13 0xc0530cf5 at acpi_pci_attach+0x185
#14 0xc0a9d489 at device_attach+0x369
#15 0xc0a9e35b at bus_generic_attach+0x2b
#16 0xc0532e52 at acpi_pcib_attach+0x262
#17 0xc0533845 at acpi_pcib_acpi_attach+0x2c5
Free backtrace:
#0 0xc0ce63f2 at redzone_check+0x312
#1 0xc0a5a9a8 at free+0x38
#2 0xc0a9b086 at devread+0x1a6
#3 0xc0a256d7 at giant_read+0x87
#4 0xc096e292 at devfs_read_f+0xc2
#5 0xc0ab6f29 at dofileread+0x99
#6 0xc0ab6b48 at sys_read+0x98
#7 0xc0ddc197 at syscall+0x387
#8 0xc0dc4f51 at Xint0x80_syscall+0x21
Starting Network: usbus0.
Starting Network: usbus1.
Starting Network: usbus2.
Starting Network: usbus3.
Starting Network: usbus4.
Starting Network: usbus5.
Starting Network: usbus6.
Starting Network: usbus7.
Starting Network: fwe0.
fwe0: flags=3D8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3D8<VLAN_MTU>
ether 4a:4f:c0:37:06:01
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
ch 1 dma -1
Starting Network: fwip0.
fwip0: flags=3D8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
lladdr 4a.4f.c0.0.10.37.6.1.a.2.ff.fe.0.0.0.0
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
dhclient already running? (pid=3D699).
add net ::ffff:0.0.0.0: gateway ::1
add net ::0.0.0.0: gateway ::1
add net fe80::: gateway ::1
add net ff02::: gateway ::1
=2E..
I'll be happy to test patches.
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
Depriving a girl or boy of an opportunity for education is evil.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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