Bug #11001
Updated by nobu (Nobuyoshi Nakada) over 9 years ago
SEGV depends on stack limit size with 'ulimit -s <size>' . This shell script [ulimit_change_test.sh] can reproduce SEGV on my Debian environment. my Linux environment is Debian/GNU Linux 7.8. But, I cannot reproduce this SEGV on Amazon Linux environment. result on Debian 7.8 ~~~ $ /tmp/ulimit_change_test.sh 8515 /tmp/ulimit_change_test.sh: 3 行: 20470 Segmentation fault ./ruby --version 8514 /tmp/ulimit_change_test.sh: 3 行: 20471 Segmentation fault ./ruby --version 8513 /tmp/ulimit_change_test.sh: 3 行: 20472 Segmentation fault ./ruby --version 8512 ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux] 8511 /tmp/ulimit_change_test.sh: 3 行: 20475 Segmentation fault ./ruby --version 8510 /tmp/ulimit_change_test.sh: 3 行: 20476 Segmentation fault ./ruby --version 8509 /tmp/ulimit_change_test.sh: 3 行: 20477 Segmentation fault ./ruby --version 8508 ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux] 8507 /tmp/ulimit_change_test.sh: 3 行: 20480 Segmentation fault ./ruby --version 8506 /tmp/ulimit_change_test.sh: 3 行: 20481 Segmentation fault ./ruby --version 8505 /tmp/ulimit_change_test.sh: 3 行: 20482 Segmentation fault ./ruby --version 8504 ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux] 8503 /tmp/ulimit_change_test.sh: 3 行: 20485 Segmentation fault ./ruby --version 8502 /tmp/ulimit_change_test.sh: 3 行: 20486 Segmentation fault ./ruby --version 8501 /tmp/ulimit_change_test.sh: 3 行: 20487 Segmentation fault ./ruby --version 8500 ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux] 8499 /tmp/ulimit_change_test.sh: 3 行: 20490 Segmentation fault ./ruby --version 8498 /tmp/ulimit_change_test.sh: 3 行: 20491 Segmentation fault ./ruby --version 8497 /tmp/ulimit_change_test.sh: 3 行: 20492 Segmentation fault ./ruby --version 8496 ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux] 8495 /tmp/ulimit_change_test.sh: 3 行: 20495 Segmentation fault ./ruby --version 8494 /tmp/ulimit_change_test.sh: 3 行: 20496 Segmentation fault ./ruby --version 8493 /tmp/ulimit_change_test.sh: 3 行: 20497 Segmentation fault ./ruby --version 8492 ruby 2.2.1p85 (2015-02-26 revision 49769) [x86_64-linux] 8491 /tmp/ulimit_change_test.sh: 3 行: 20500 Segmentation fault ./ruby --version 8490 /tmp/ulimit_change_test.sh: 3 行: 20501 Segmentation fault ./ruby --version 8489 /tmp/ulimit_change_test.sh: 3 行: 20502 Segmentation fault ./ruby --version $ ~~~ This SEGV occurs in `reserve_stack()` reserve_stack() function. I suspect that the `buf[0x100]` buf[0x100] size is too small for margin. I attached patch to fix it.