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| author | Josh Boyer <jwboyer@redhat.com> | 2013-10-11 08:45:51 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 12:24:22 -0800 |
| commit | 37b1780623b001b57c92bc8c81c570a88f6f30d4 (patch) | |
| tree | 76d4f61de6e2500c129aff9da902a9286bce191b /tools/power | |
| parent | 96350a7067c73a288af679f3420431cabe9453bc (diff) | |
| download | lwn-37b1780623b001b57c92bc8c81c570a88f6f30d4.tar.gz lwn-37b1780623b001b57c92bc8c81c570a88f6f30d4.zip | |
cpupower: Fix segfault due to incorrect getopt_long arugments
commit f447ef4a56dee4b68a91460bcdfe06b5011085f2 upstream.
If a user calls 'cpupower set --perf-bias 15', the process will end with
a SIGSEGV in libc because cpupower-set passes a NULL optarg to the atoi
call. This is because the getopt_long structure currently has all of
the options as having an optional_argument when they really have a
required argument. We change the structure to use required_argument to
match the short options and it resolves the issue.
This fixes https://bugzilla.redhat.com/show_bug.cgi?id=1000439
Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/power')
| -rw-r--r-- | tools/power/cpupower/utils/cpupower-set.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/tools/power/cpupower/utils/cpupower-set.c b/tools/power/cpupower/utils/cpupower-set.c index dc4de3762111..bcf1d2f0b791 100644 --- a/tools/power/cpupower/utils/cpupower-set.c +++ b/tools/power/cpupower/utils/cpupower-set.c @@ -18,9 +18,9 @@ #include "helpers/bitmask.h" 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'}, + { .name = "perf-bias", .has_arg = required_argument, .flag = NULL, .val = 'b'}, + { .name = "sched-mc", .has_arg = required_argument, .flag = NULL, .val = 'm'}, + { .name = "sched-smt", .has_arg = required_argument, .flag = NULL, .val = 's'}, { }, }; |