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util: always malloc for setproctitle

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Closes #1407

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
This commit is contained in:
Tycho Andersen 2017-02-02 09:36:31 +01:00
parent 4ce84082f0
commit be69ad435d
1 changed files with 6 additions and 16 deletions
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22
src/lxc/utils.c
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@ -1463,34 +1463,24 @@ int setproctitle(char *title)
if (!tmp)
return -1;
i = sscanf(tmp, "%lu %lu %lu %lu %lu %lu %lu",
i = sscanf(tmp, "%lu %lu %lu %*u %*u %lu %lu",
&start_data,
&end_data,
&start_brk,
&arg_start,
&arg_end,
&env_start,
&env_end);
if (i != 7)
if (i != 5)
return -1;
/* Include the null byte here, because in the calculations below we
* want to have room for it. */
len = strlen(title) + 1;
/* If we don't have enough room by just overwriting the old proctitle,
* let's allocate a new one.
*/
if (len > arg_end - arg_start) {
void *m;
m = realloc(proctitle, len);
if (!m)
return -1;
proctitle = m;
arg_start = (unsigned long) proctitle;
}
proctitle = realloc(proctitle, len);
if (!proctitle)
return -1;
arg_start = (unsigned long) proctitle;
arg_end = arg_start + len;
brk_val = syscall(__NR_brk, 0);