Package: powertop
Version: 2.0-0.2
Severity: important
Tags: upstream
powertop crashes at startup with
*** stack smashing detected ***: powertop terminated
The crash is not reproducible with powertop:amd64.
After recompiling powertop to get debug symbols I got the following
backtrace with gdb.:
#0 0xf7fdf425 in __kernel_vsyscall ()
#1 0xf7ca1941 in *__GI_raise (sig=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2 0xf7ca4d72 in *__GI_abort () at abort.c:92
#3 0xf7cdb305 in __libc_message (do_abort=2, fmt=0xf7dae5c8 "*** %s ***: %s
terminated\n")
at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
#4 0xf7d5beb0 in *__GI___fortify_fail (msg=<optimized out>) at
fortify_fail.c:32
#5 0xf7d5be5a in __stack_chk_fail () at stack_chk_fail.c:29
#6 0x08066f91 in process::process (this=0xdf00650, _comm=<optimized out>,
_pid=7812, _tid=0) at process/process.cpp:140
#7 0x08067277 in find_create_process (comm=0xde7794c "mplayer", pid=7812) at
process/process.cpp:173
#8 0x0806a9b3 in perf_process_bundle::handle_trace_point (this=0xde4e080,
trace=0xde7791c, cpu=0, time=1053728094267690)
at process/do_process.cpp:264
#9 0x0806fd52 in perf_bundle::process (this=0xde4e080) at
perf/perf_bundle.cpp:303
#10 0x0806b6c6 in process_process_data () at process/do_process.cpp:1131
#11 0x08089d0f in one_measurement (seconds=1) at main.cpp:193
#12 0x0804dd5a in main (argc=1, argv=0xffffdc94) at main.cpp:418
/proc/7812/cmdline contains exactly 4096 characters (though
process::process appears to read only 4095 of them) and is not
null-terminated. As a result, variable "line" does not contain
sequence of two nulls and cmdline_to_string replaces nulls with spaces
further into stack until it finds such sequence.
As expected, powertop does not crash if there is no process with long
command line.
-- System Information:
Debian Release: wheezy/sid
APT prefers testing
APT policy: (900, 'testing'), (400, 'stable')
Architecture: i386 (x86_64)
Foreign Architectures: amd64
Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages powertop depends on:
ii libc6 2.13-33
ii libgcc1 1:4.7.1-2
ii libncursesw5 5.9-10
ii libnl-3-200 3.2.7-4
ii libnl-genl-3-200 3.2.7-4
ii libpci3 1:3.1.9-5
ii libstdc++6 4.7.1-2
ii libtinfo5 5.9-10
ii zlib1g 1:1.2.7.dfsg-13
powertop recommends no packages.
Versions of packages powertop suggests:
ii cpufrequtils 008-1
pn laptop-mode-tools <none>
-- no debconf information
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