According to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=682388
the string is not null terminated when too much data is read.
This patch fixes the crashes for me. My traces:
PowerTOP 2.1 Overview Idle stats Frequency stats Device stats Tunab
Package | CPU 0
POLL 0.0% | POLL 0.0% 0.0 ms
C1 0.0% | C1 0.0% 0.0 ms
C2 3.8% | C2 5.4% 0.2 ms
C3 12.4% | C3 20.9% 1.7 ms
| CPU 1
| POLL 0.0% 0.0 ms
| C1 0.0% 0.2 ms
| C2 2.2% 0.2 ms
| C3 3.8% 0.9 ms
*** stack smashing detected ***: /usr/local/sbin/powertop terminated
=======
Backtrace: =========
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__fortify_fail+0x50)[0xb7d7be70]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(+0xe4e1a)[0xb7d7be1a]
/usr/local/sbin/powertop[0x8067a01]
<ESC> Exit | /usr/local/sbin/powertop[0x8067ce7]
/usr/local/sbin/powertop[0x806b727]
/usr/local/sbin/powertop[0x8070d62]
/usr/local/sbin/powertop[0x806c2e6]
/usr/local/sbin/powertop[0x8089ecf]
/usr/local/sbin/powertop[0x804df42]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xe6)[0xb7cade46]
/usr/local/sbin/powertop[0x804e0f1]
======= Memory map: ========
08048000-080af000 r-xp
00000000 08:02 2336756 /usr/local/sbin/powertop
080af000-080b0000 rw-p 00067000
08:02 2336756 /usr/local/sbin/powertop
080b0000-1022a000 rw-p 00000000 00:00 0
[heap]
b68c6000-b69c7000 rw-p 00000000 00:00 0
b6aaa000-b6acb000 rw-p
00000000 00:00 0
b6acb000-b6b4c000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b6b4c000-b6bcd000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b6bcd000-b6c4e000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b6c4e000-b6ccf000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b6ccf000-b6d50000
rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b6d50000-b6dd1000 rw-s
00000000 00:09 5025 anon_inode:[perf_event]
b6dd1000-b6e52000 rw-s 00000000
00:09 5025 anon_inode:[perf_event]
b6e52000-b6ed3000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b6ed3000-b6f54000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b6f54000-b6fd5000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b6fd5000-b7056000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b7056000-b70d7000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b70d7000-b7158000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b7158000-b71d9000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b71d9000-b725a000
rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b725a000-b72db000 rw-s
00000000 00:09 5025 anon_inode:[perf_event]
b72db000-b735c000 rw-s 00000000
00:09 5025 anon_inode:[perf_event]
b735c000-b73dd000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b73dd000-b745e000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b745e000-b74df000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b74df000-b7560000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b7560000-b75e1000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b75e1000-b7662000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b7662000-b76e3000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b76e3000-b7764000
rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b7764000-b77e5000 rw-s
00000000 00:09 5025 anon_inode:[perf_event]
b77e5000-b7866000 rw-s 00000000
00:09 5025 anon_inode:[perf_event]
b7866000-b78e7000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b78e7000-b7968000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b7968000-b79e9000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b79e9000-b7a6a000 rw-s 00000000 00:09 5025
anon_inode:[perf_event]
b7a6a000-b7aeb000 rw-s 00000000 00:09 5025 anon_inode:[perf_event]
b7aeb000-b7c62000 r--p 00000000 08:02 2621607 /usr/lib/locale/locale-archive
b7c62000-b7c65000 rw-p 00000000 00:00 0
b7c65000-b7c67000 r-xp 00000000 08:02
632012 /lib/i386-linux-gnu/i686/cmov/libdl-2.13.so
b7c67000-b7c68000 r--p 00001000
08:02 632012 /lib/i386-linux-gnu/i686/cmov/libdl-2.13.so
b7c68000-b7c69000
rw-p 00002000 08:02 632012 /lib/i386-linux-gnu/i686/cmov/libdl-2.13.so
b7c69000-b7c6a000 rw-p 00000000 00:00 0
b7c6a000-b7c7a000 r-xp 00000000 08:02 632036
/lib/i386-linux-gnu/i686/cmov/libresolv-2.13.so
b7c7a000-b7c7b000 r--p 00010000
08:02 632036 /lib/i386-linux-gnu/i686/cmov/libresolv-2.13.so
b7c7b000-b7c7c000 rw-p 00011000 08:02 632036
/lib/i386-linux-gnu/i686/cmov/libresolv-2.13.so
b7c7c000-b7c7e000 rw-p 00000000 00:00 0
b7c7e000-b7c95000 r-xp 00000000 08:02
632038 /lib/i386-linux-gnu/libz.so.1.2.7
b7c95000-b7c96000 r--p 00016000 08:02
632038 /lib/i386-linux-gnu/libz.so.1.2.7
b7c96000-b7c97000 rw-p 00017000
08:02 632038 /lib/i386-linux-gnu/libz.so.1.2.7
b7c97000-b7ded000 r-xp 00000000
08:02 632108 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b7ded000-b7dee000 ---p
00156000 08:02 632108 /lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b7dee000-b7df0000 r--p 00156000 08:02 632108
/lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b7df0000-b7df1000 rw-p 00158000 08:02 632108
/lib/i386-linux-gnu/i686/cmov/libc-2.13.so
b7df1000-b7df4000 rw-p 00000000 00:00 0
b7df4000-b7e10000 r-xp
00000000 08:02 630810 /lib/i386-linux-gnu/libgcc_s.so.1
b7e10000-b7e11000 rw-p
0001b000 08:02 630810 /lib/i386-linux-gnu/libgcc_s.so.1
b7e11000-b7e35000 r-xp
00000000 08:02 632046 /lib/i386-linux-gnu/i686/cmov/libm-2.13.so
b7e35000-b7e36000 r--p 00023000 08:02 632046
/lib/i386-linux-gnu/i686/cmov/libm-2.13.so
b7e36000-b7e37000 rw-p 00024000 08:02 632046
/lib/i386-linux-gnu/i686/cmov/libm-2.13.so
b7e37000-b7e38000 rw-p 00000000 00:00 0
b7e38000-b7f18000 r-xp 00000000
08:02 2514966 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.17
b7f18000-b7f1c000
r--p 000e0000 08:02 2514966 /usr/lib/i386-linux-gnu/libstdc++.so.6.0.17
b7f1c000-b7f1d000 rw-p 000e4000 08:02 2514966
/usr/lib/i386-linux-gnu/libstdc++.so.6.0.17
b7f1d000-b7f24000 rw-p 00000000 00:00 0
b7f24000-b7f41000 r-xp 00000000
08:02 630823 /lib/i386-linux-gnu/libtinfo.so.5.9
b7f41000-b7f43000 r--p 0001c000
08:02 630823 /lib/i386-linux-gnu/libtinfo.so.5.9
b7f43000-b7f44000 rw-p
0001e000 08:02 630823 /lib/i386-linux-gnu/libtinfo.so.5.9
b7f44000-b7f75000 r-xp
00000000 08:02 630988 /lib/i386-linux-gnu/libncursesw.so.5.9
b7f75000-b7f76000
r--p 00030000 08:02 630988 /lib/i386-linux-gnu/libncursesw.so.5.9
b7f76000-b7f77000 rw-p 00031000 08:02 630988
/lib/i386-linux-gnu/libncursesw.so.5.9
b7f77000-b7f8c000 r-xp 00000000 08:02 631069
/lib/i386-linux-gnu/i686/cmov/libpthread-2.13.so
b7f8c000-b7f8d000 r--p 00014000 08:02 631069
/lib/i386-linux-gnu/i686/cmov/libpthread-2.13.so
b7f8d000-b7f8e000 rw-p 00015000 08:02 631069
/lib/i386-linux-gnu/i686/cmov/libpthread-2.13.so
b7f8e000-b7f90000 rw-p 00000000
00:00 0
b7f90000-b7fa7000 r-xp 00000000 08:02 630877
/lib/i386-linux-gnu/libnl-3.so.200.5.2
b7fa7000-b7fa8000 r--p 00017000 08:02 630877
/lib/i386-linux-gnu/libnl-3.so.200.5.2
b7fa8000-b7fa9000 rw-p 00018000 08:02 630877
/lib/i386-linux-gnu/libnl-3.so.200.5.2
b7fa9000-b7faa000 rw-p 00000000 00:00 0
b7faa000-b7fae000 r-xp 00000000 08:02 630867
/lib/i386-linux-gnu/libnl-genl-3.so.200.5.2
b7fae000-b7faf000 r--p 00003000 08:02 630867
/lib/i386-linux-gnu/libnl-genl-3.so.200.5.2
b7faf000-b7fb0000 rw-p 00004000 08:02 630867
/lib/i386-linux-gnu/libnl-genl-3.so.200.5.2
b7fb0000-b7fbb000 r-xp 00000000 08:02 630812
/lib/i386-linux-gnu/libpci.so.3.1.9
b7fbb000-b7fbc000 r--p 0000a000 08:02 630812
/lib/i386-linux-gnu/libpci.so.3.1.9
b7fbc000-b7fbd000 rw-p 0000b000 08:02 630812
/lib/i386-linux-gnu/libpci.so.3.1.9
b7fd6000-b7fdd000 r--s 00000000 08:02
2518433 /usr/lib/i386-linux-gnu/gconv/gconv-modules.cache
b7fdd000-b7fdf000 r--p
00000000 08:02 2892068 /usr/local/share/locale/en_US/LC_MESSAGES/powertop.mo
b7fdf000-b7fe1000 rw-p 00000000 00:00 0
b7fe1000-b7fe2000 r-xp 00000000 00:00 0
[vdso]
b7fe2000-b7ffe000 r-xp 00000000 08:02 630935 /lib/i386-linux
Program received signal SIGABRT, Aborted.
0xb7fe1424 in __kernel_vsyscall ()
(gdb) bt full
No symbol table info available.
at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
resultvar = <optimized out>
pid = -1210122252
selftid = 22773
act = {__sigaction_handler = {
sa_handler = 0xb7fff4e4 <_rtld_global+1220>,
sa_sigaction = 0xb7fff4e4 <_rtld_global+1220>}, sa_mask = {
__val = {1835008, 134937032, 134519608, 3221208440, 4319,
3221208408, 134515384, 134515200, 3221208252, 4, 3221208336,
3084252763, 134937032, 3083678964, 3084845044, 11, 3221209724,
3221208456, 3084371588, 55, 3221208336, 4, 0, 3221208432, 0, 2,
3084702268, 3084702264, 3084697743, 3084697808, 230,
3221208336}}, sa_flags = -1073758888, sa_restorer = 0xb7dce616}
sigs = {__val = {32, 0 <repeats 31 times>}}
fmt=0xb7dce588 "*** %s ***: %s terminated\n")
at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
ap = <optimized out>
fd = -1073758600
---Type <return> to continue, or q <return> to quit---
on_2 = <optimized out>
list = <optimized out>
nlist = <optimized out>
cp = <optimized out>
written = false
at fortify_fail.c:32
No locals.
No locals.
No symbol table info available.
No symbol table info available.
No symbol table info available.
No symbol table info available.
No symbol table info available.
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
ubp_av=0xbffff7f4, init=0x80954e0, fini=0x80954d0, rtld_fini=0xb7ff0590,
stack_end=0xbffff7ec) at libc-start.c:228
result = <optimized out>
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1210122252, 0, 0,
-1073743928, 766793170, 1206313922}, mask_was_saved = 0}},
priv = {pad = {0x0, 0x0, 0x1, 0x804e0d0}, data = {prev = 0x0,
cleanup = 0x0, canceltype = 1}}}
not_first_call = <optimized out>
No symbol table info available.
---
src/process/process.cpp | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/process/process.cpp b/src/process/process.cpp
index 71f81b6..34dc68d 100644
--- a/src/process/process.cpp
+++ b/src/process/process.cpp
@@ -86,7 +86,7 @@ static void cmdline_to_string(char *str)
process::process(const char *_comm, int _pid, int _tid) : power_consumer()
{
- char line[4096];
+ char line[4097];
ifstream file;
strcpy(comm, _comm);
@@ -103,6 +103,7 @@ process::process(const char *_comm, int _pid, int _tid) :
power_consumer()
file.open(line);
while (file) {
file.getline(line, 4096);
+ line[4096] = '\0';
if (strstr(line, "Tgid")) {
char *c;
c = strchr(line, ':');
--
1.7.10.4
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