Description of problem: When I run "cpupower set --perf-bias 0", there is a segmentation fault, and it dumps core. Version-Release number of selected component (if applicable): cpupower 3.3.7-1.fc16.x86_64 How reproducible: Just run the command. Steps to Reproduce: 1. Run "cpupower set --perf-bias 0" 2. 3. Actual results: Segmentation fault (core dumped) Expected results: Should change the CPU performance bias. Additional info: Here is a gdb backtrace: bash$ gdb /usr/bin/cpupower GNU gdb (GDB) Fedora (7.3.50.20110722-13.fc16) Copyright (C) 2011 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-redhat-linux-gnu". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from /usr/bin/cpupower...(no debugging symbols found)...done. Missing separate debuginfos, use: debuginfo-install kernel-tools-3.3.7-1.fc16.x86_64 (gdb) run set --perf-bias 0 Starting program: /usr/bin/cpupower set --perf-bias 0 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib64/libthread_db.so.1". Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7445cf4 in ____strtoll_l_internal () from /lib64/libc.so.6 (gdb) bt #0 0x00007ffff7445cf4 in ____strtoll_l_internal () from /lib64/libc.so.6 #1 0x0000000000408752 in ?? () #2 0x0000000000406af4 in ?? () #3 0x00007ffff742c69d in __libc_start_main () from /lib64/libc.so.6 #4 0x00000000004020c9 in ?? () #5 0x00007fffffffdc18 in ?? () #6 0x000000000000001c in ?? () #7 0x0000000000000004 in ?? () #8 0x00007fffffffe002 in ?? () #9 0x00007fffffffe014 in ?? () #10 0x00007fffffffe018 in ?? () #11 0x00007fffffffe024 in ?? () #12 0x0000000000000000 in ?? ()
I just realized that the short option (-b) works. In cpupower-set.c, getopt_long is called like so: while ((ret = getopt_long(argc, argv, "m:s:b:", set_opts, NULL)) != -1) { And set_opts is defined like this: static struct option set_opts[] = { { .name = "perf-bias", .has_arg = optional_argument, .flag = NULL, .val = 'b'}, { .name = "sched-mc", .has_arg = optional_argument, .flag = NULL, .val = 'm'}, { .name = "sched-smt", .has_arg = optional_argument, .flag = NULL, .val = 's'}, { }, }; Shouldn't has_arg be "required_argument", not "optional_argument"? I think that may be causing the problem. Regards, Andy
reported to upstream maintainer.
# Mass update to all open bugs. Kernel 3.6.2-1.fc16 has just been pushed to updates. This update is a significant rebase from the previous version. Please retest with this kernel, and let us know if your problem has been fixed. In the event that you have upgraded to a newer release and the bug you reported is still present, please change the version field to the newest release you have encountered the issue with. Before doing so, please ensure you are testing the latest kernel update in that release and attach any new and relevant information you may have gathered. If you are not the original bug reporter and you still experience this bug, please file a new report, as it is possible that you may be seeing a different problem. (Please don't clone this bug, a fresh bug referencing this bug in the comment is sufficient).
I retested. This bug is still present in kernel-tools-3.6.2-1.fc16.x86_64. Regards, Andy
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