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Date: Mon, 27 May 2013 14:24:23 +0200
From: Guth <guth@...posor.com>
To: john-dev@...ts.openwall.com
Subject: Segfault - contest edition

Hi,
I received a sig11 (from the github release used during contest) with the
folowing CLI:
john  --fork=8 --sess=dev4 --format=sha256crypt
hashes_4.sha256crypt.pw-uncracked  -w=tomato.txt  --rules=UP_1stnL

cat tomato.txt
tomato
tomatoes
tomates
tomate

################
Will run 3 OpenMP threads per process (24 total across 8 processes)
Node numbers 1-8 of 8 (fork)
Each node loaded 1/8 of wordfile to memory (about 0 KB/node)
Press Ctrl-C or 'q' to abort, almost any other key for status
6 0g 0:00:00:00 DONE (2013-05-27 14:05) 0g/s 0p/s 0c/s 0C/s
5 0g 0:00:00:00 DONE (2013-05-27 14:05) 0g/s 0p/s 0c/s 0C/s
8 0g 0:00:00:00 DONE (2013-05-27 14:05) 0g/s 0p/s 0c/s 0C/s
[bigbox:12294] *** Process received signal ***
[bigbox:12294] Signal: Segmentation fault (11)
[bigbox:12294] Signal code: Address not mapped (1)
[bigbox:12294] Failing at address: 0x7fa101c759d0
[bigbox:12291] *** Process received signal ***
[bigbox:12291] Signal: Segmentation fault (11)
[bigbox:12291] Signal code: Address not mapped (1)
[bigbox:12291] Failing at address: 0x7fa101c759d0
[bigbox:12300] *** Process received signal ***
[bigbox:12300] Signal: Segmentation fault (11)
[bigbox:12300] Signal code: Address not mapped (1)
[bigbox:12300] Failing at address: 0x7fa101c759d0
[bigbox:12294] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0xf030)
[0x7fa10bcdd030]
[bigbox:12294] [ 1]
/lib/x86_64-linux-gnu/libpthread.so.0(pthread_join+0x2c) [0x7fa10bcd5d8c]
[bigbox:12294] [ 2] /usr/lib/libnvidia-opencl.so.1(+0x619343)
[0x7fa103e94343]
[bigbox:12294] [ 3] /usr/lib/libnvidia-opencl.so.1(+0x185919)
[0x7fa103a00919]
[bigbox:12294] [ 4] /usr/lib/libnvidia-opencl.so.1(+0x185172)
[0x7fa103a00172]
[bigbox:12294] [ 5] /usr/lib/libnvidia-opencl.so.1(+0x177022)
[0x7fa1039f2022]
[bigbox:12294] [ 6] /usr/lib/libnvidia-opencl.so.1(+0x16e8a5)
[0x7fa1039e98a5]
[bigbox:12294] [ 7] /usr/lib/libnvidia-opencl.so.1(+0x16ed0b)
[0x7fa1039e9d0b]
[bigbox:12294] [ 8] /usr/lib/libnvidia-opencl.so.1(+0x176bdb)
[0x7fa1039f1bdb]
[bigbox:12294] [ 9] ./john(clean_opencl_environment+0x61) [0x612ce1]
[bigbox:12294] [10] ./john() [0x5f27bd]
[bigbox:12294] [11] ./john(main+0x714) [0x5f2eef]
[bigbox:12294] [12] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)
[0x7fa10b962ead]
[bigbox:12294] [13] ./john() [0x41f6bd]
[bigbox:12294] *** End of error message ***
[bigbox:12291] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0xf030)
[0x7fa10bcdd030]
[bigbox:12291] [ 1]
/lib/x86_64-linux-gnu/libpthread.so.0(pthread_join+0x2c) [0x7fa10bcd5d8c]
[bigbox:12291] [ 2] /usr/lib/libnvidia-opencl.so.1(+0x619343)
[0x7fa103e94343]
[bigbox:12291] [ 3] /usr/lib/libnvidia-opencl.so.1(+0x185919)
[0x7fa103a00919]
[bigbox:12291] [ 4] /usr/lib/libnvidia-opencl.so.1(+0x185172)
[0x7fa103a00172]
[bigbox:12291] [ 5] /usr/lib/libnvidia-opencl.so.1(+0x177022)
[0x7fa1039f2022]
[bigbox:12291] [ 6] /usr/lib/libnvidia-opencl.so.1(+0x16e8a5)
[0x7fa1039e98a5]
[bigbox:12291] [ 7] /usr/lib/libnvidia-opencl.so.1(+0x16ed0b)
[0x7fa1039e9d0b]
[bigbox:12291] [ 8] /usr/lib/libnvidia-opencl.so.1(+0x176bdb)
[0x7fa1039f1bdb]
[bigbox:12291] [ 9] ./john(clean_opencl_environment+0x61) [0x612ce1]
[bigbox:12291] [10] ./john() [0x5f27bd]
[bigbox:12291] [11] ./john(main+0x714) [0x5f2eef]
[bigbox:12291] [12] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)
[0x7fa10b962ead]
[bigbox:12291] [13] ./john() [0x41f6bd]
[bigbox:12291] *** End of error message ***
[bigbox:12300] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0xf030)
[0x7fa10bcdd030]
[bigbox:12300] [ 1]
/lib/x86_64-linux-gnu/libpthread.so.0(pthread_join+0x2c) [0x7fa10bcd5d8c]
[bigbox:12300] [ 2] /usr/lib/libnvidia-opencl.so.1(+0x619343)
[0x7fa103e94343]
[bigbox:12300] [ 3] /usr/lib/libnvidia-opencl.so.1(+0x185919)
[0x7fa103a00919]
[bigbox:12300] [ 4] /usr/lib/libnvidia-opencl.so.1(+0x185172)
[0x7fa103a00172]
[bigbox:12300] [ 5] /usr/lib/libnvidia-opencl.so.1(+0x177022)
[0x7fa1039f2022]
[bigbox:12300] [ 6] /usr/lib/libnvidia-opencl.so.1(+0x16e8a5)
[0x7fa1039e98a5]
[bigbox:12300] [ 7] /usr/lib/libnvidia-opencl.so.1(+0x16ed0b)
[0x7fa1039e9d0b]
[bigbox:12300] [ 8] /usr/lib/libnvidia-opencl.so.1(+0x176bdb)
[0x7fa1039f1bdb]
[bigbox:12300] [ 9] ./john(clean_opencl_environment+0x61) [0x612ce1]
[bigbox:12300] [10] ./john() [0x5f27bd]
[bigbox:12300] [11] ./john(main+0x714) [0x5f2eef]
[bigbox:12300] [12] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)
[0x7fa10b962ead]
[bigbox:12300] [13] ./john() [0x41f6bd]
[bigbox:12300] *** End of error message ***
7 0g 0:00:00:00 DONE (2013-05-27 14:05) 0g/s 0p/s 0c/s 0C/s
[bigbox:12297] *** Process received signal ***
[bigbox:12297] Signal: Segmentation fault (11)
[bigbox:12297] Signal code: Address not mapped (1)
[bigbox:12297] Failing at address: 0x7fa101c759d0
[bigbox:12297] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0xf030)
[0x7fa10bcdd030]
[bigbox:12297] [ 1]
/lib/x86_64-linux-gnu/libpthread.so.0(pthread_join+0x2c) [0x7fa10bcd5d8c]
[bigbox:12297] [ 2] /usr/lib/libnvidia-opencl.so.1(+0x619343)
[0x7fa103e94343]
[bigbox:12297] [ 3] /usr/lib/libnvidia-opencl.so.1(+0x185919)
[0x7fa103a00919]
[bigbox:12297] [ 4] /usr/lib/libnvidia-opencl.so.1(+0x185172)
[0x7fa103a00172]
[bigbox:12297] [ 5] /usr/lib/libnvidia-opencl.so.1(+0x177022)
[0x7fa1039f2022]
[bigbox:12297] [ 6] /usr/lib/libnvidia-opencl.so.1(+0x16e8a5)
[0x7fa1039e98a5]
[bigbox:12297] [ 7] /usr/lib/libnvidia-opencl.so.1(+0x16ed0b)
[0x7fa1039e9d0b]
[bigbox:12297] [ 8] /usr/lib/libnvidia-opencl.so.1(+0x176bdb)
[0x7fa1039f1bdb]
[bigbox:12297] [ 9] ./john(clean_opencl_environment+0x61) [0x612ce1]
[bigbox:12297] [10] ./john() [0x5f27bd]
[bigbox:12297] [11] ./john(main+0x714) [0x5f2eef]
[bigbox:12297] [12] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd)
[0x7fa10b962ead]
[bigbox:12297] [13] ./john() [0x41f6bd]
[bigbox:12297] *** End of error message ***
4 0g 0:00:05:43 DONE (2013-05-27 14:11) 0g/s 0p/s 15.57c/s 15.57C/s TomatE
3 0g 0:00:05:43 DONE (2013-05-27 14:11) 0g/s 0p/s 16.22c/s 16.22C/s TomateS
1 0g 0:00:05:43 DONE (2013-05-27 14:11) 0g/s 0p/s 16.32c/s 16.32C/s TomatO
2 0g 0:00:05:43 DONE (2013-05-27 14:11) 0g/s 0p/s 14.68c/s 14.68C/s TomatoeS
2 0g 0:00:05:44 DONE (2013-05-27 14:11) 0g/s 0p/s 14.68c/s 14.68C/s TomatoeS
3 0g 0:00:05:44 DONE (2013-05-27 14:11) 0g/s 0p/s 16.22c/s 16.22C/s TomateS
1 0g 0:00:05:44 DONE (2013-05-27 14:11) 0g/s 0p/s 16.32c/s 16.32C/s TomatO
4 0g 0:00:05:44 DONE (2013-05-27 14:11) 0g/s 0p/s 15.57c/s 15.57C/s TomatE
Wait...^M1 0g 0:00:05:59 DONE (2013-05-27 14:11) 0g/s 0p/s 16.32c/s
16.32C/s TomatO
Waiting for 7 children to terminate
Session aborted
################

4 proceses still run fine after segfault.
So my guess is segfault when wordlist length < fork_number

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