segfault when downloading with wget (busybox)

[Antonio Terceiro]

When trying to download from wget http://releases.linaro.org/12.11/components/toolchain/
binaries/gcc-linaro-aarch64-linux-gnu-4.7-2012.11-1-20121127_linux.tar.bz2 from the 12.11 OE minimal image, I get this:

--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<
root@genericarmv8:~# wget http://releases.linaro.org/12.11/components/toolchain/
binaries/gcc-linaro-aarch64-linux-gnu-4.7-2012.11-1-20121127_linux.tar.bz2
Connecting to releases.linaro.org (91.189.95.16:80)
gcc-linaro-aarch64-l 0% | | 112k 0:09:27 ETA[ 596.830574] wget[591]: unhandled level 3 translation fault (11) at 0x7fa32f0000, esr 0x92000007
[ 596.830646] pgd = ffffffc87fe0e000
[ 596.830702] [7fa32f0000] *pgd=00000008ffd6d003, *pmd=00000008ffd8b003, *pte=0000000000000000
[ 596.830845]
[ 596.830896] Pid: 591, comm: wget
[ 596.830972] CPU: 0 Not tainted (3.6.0-1-linaro-vexpress64 #1~ci+121125151101)
[ 596.831045] PC is at 0x7fa33b0f40
[ 596.831103] LR is at 0x7fa33b0d28
[ 596.831171] pc : [<0000007fa33b0f40>] lr : [<0000007fa33b0d28>] pstate: 20000000
[ 596.831238] sp : 0000007fe6fd4510
[ 596.831293] x29: 0000007fe6fd4510 x28: 0000000000000000
[ 596.831409] x27: 000000000ea29060 x26: 000000000ea26098
[ 596.831524] x25: 000000000ea28fb0 x24: 0000007fa349b000
[ 596.831640] x23: 0000000000001000 x22: 0000000000001000
[ 596.831756] x21: 0000007fa32ef087 x20: 000000000ea26098
[ 596.831872] x19: 000000000ea26098 x18: 0000007fe6fd4280
[ 596.831989] x17: 0000007fa3398d28 x16: 00000000004917e8
[ 596.832104] x15: 0000000000000000 x14: 0000000000002710
[ 596.832220] x13: ffffffffffffffff x12: ffffffffffffffff
[ 596.832337] x11: 000000007fffffff x10: 0000000000000000
[ 596.832451] x9 : 0000000000000000 x8 : 0000000000000000
[ 596.832564] x7 : 0000000000000000 x6 : 0000000000000000
[ 596.832679] x5 : 0000007fa32effe8 x4 : 0000000000000008
[ 596.832793] x3 : 0000000000000038 x2 : 0000000000000014
[ 596.832906] x1 : 0000000000000000 x0 : 000000000ea26ff0
[ 596.833014]
Segmentation fault
root@genericarmv8:~# wget --version
wget: unrecognized option '--version'
BusyBox v1.20.2 (2012-11-24 18:49:59 UTC) multi-call binary.

Usage: wget [-c|--continue] [-s|--spider] [-q|--quiet] [-O|--output-document FILE]
 [--header 'header: value'] [-Y|--proxy on/off] [-P DIR]
 [--no-check-certificate] [-U|--user-agent AGENT] [-T SEC] URL...

root@genericarmv8:~#
--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<

12.11 OE pre-built image (minimal) on Foundation_v8 simulator. Happens all the time with the same command line.
Downloading the Linaro homepage, OTOH, does not trigger this.

--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<
root@genericarmv8:~# wget http://www.linaro.org/
Connecting to www.linaro.org (50.56.81.148:80)
index.html 100% |*******************************| 32156 0:00:00 ETA
root@genericarmv8:~#
--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<--------------------8<

Please let me know is there is any other info I can provide to help debug this.

[Marcin Juszkiewicz (hrw)]

Please retry with recent images.

[Fathi Boudra (fboudra)]

Marcin/Antonio, can you reproduce with latest release? Include Soumya to try as well.

[Soumya Basak (soumya-basak)]

The same issue is reproduced with the latest build as well:

OE_minimal image: http://snapshots.linaro.org/openembedded/pre-built/vexpress64/latest/vexpress64-openembedded_minimal-armv8_20130331-279.img.gz

[Soumya Basak (soumya-basak)]

Hi, the same issue is reproduced with the latest release as well

OE_minimal builds: http://snapshots.linaro.org/openembedded/pre-built/vexpress64/274/vexpress64-openembedded_minimal-armv8_20130320-274.img.gz

[Antonio Terceiro (terceiro)]

Hi Soumya - thanks for testing it! :-)

[Marcin Juszkiewicz (hrw)]

Booted minimal #286 image with fastmodel<>host networking setup. Fetched 156MB file using wget:

pp.git.tar.gzrmv8:/tmp# wget http://192.168.168.1/git2_github.com.openSUSE.libzypp.git.tar.gz
Connecting to 192.168.168.1 (192.168.168.1:80)
git2_github.com.open 100% |*******************************| 155M 0:00:00 ETA
root@genericarmv8:/tmp#

No segfault. Will try same with #274 image

[Marcin Juszkiewicz (hrw)]

OK, same on #274 image - no segfault.

Hard to debug when can not reproduce ;(

[Antonio Terceiro (terceiro)]

in my original comment when I posted the bug, the segfault happened for a given URL but not for another:

http://releases.linaro.org/12.11/components/toolchain/binaries/gcc-linaro-aarch64-linux-gnu-4.7-2012.11-1-20121127_linux.tar.bz2 -> segfault

http://www.linaro.org/ -> no segfault

maybe you are trying specifically URL's that don't cause this?

[Marcin Juszkiewicz (hrw)]

Maybe I do not want to reconfigure my host system to get forwarding setup for fastmodel?

[Soumya Basak (soumya-basak)]

with minimal image #286, can not fetch any file from my side.
root@genericarmv8:~# wget http://192.168.168.1/git2_github.com.openSUSE.libzypp.git.tar.gz

Connecting to 192.168.168.1 (192.168.168.1:80)
wget: can't connect to remote host (192.168.168.1): Connection refused
root@genericarmv8:~#

root@genericarmv8:~# wget http://www.linaro.org/
wget: bad address 'www.linaro.org'
root@genericarmv8:~#

[Marcin Juszkiewicz (hrw)]

Soumya: without configuration of models you will not get network.

[Marcin Juszkiewicz (hrw)]

Bug appeared with full licensed fast model which is not a release target.

As there can be many things which can influence bug will stay open to check later.

[Antonio Terceiro (terceiro)]

Actually note that when I reported the bug, it was on *Foundation* v8 model, not the full one.

[Andrew McDermott (frobware)]

I tried to reproduce this with a build from 10th May.

Running my model as:

/home/aim/linaro/Foundation_v8pkg/models/Linux64_GCC-4.1/Foundation_v8 --network-bridge=ARMaim --network bridged --image ~/Downloads/img-foundation.axf --block-device ~/Downloads/vexpress64-openembedded_minimal-armv8_20130510-325.img
img-foundation.axf

I was able to complete the following wget without any SEGV:

wget http://releases.linaro.org/12.11/components/toolchain/binaries/gcc-linaro-aarch64-linux-gnu-4.7-2012.11-1-20121127_linux.tar.bz2

The wget would quite often stall but it did complete.

[Andrew McDermott (frobware)]

My version of wget was also the same as in #11

root@genericarmv8:/tmp# wget
BusyBox v1.20.2 (2013-05-10 19:34:59 UTC) multi-call binary.

[Fathi Boudra (fboudra)]

Thanks Andrew. Closing.