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c/r: check that cgroup_num_hierarchies > 0

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Otherwise in the error case, we end up subtracting two from the
static_args, which would lead to a segfault :)

Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
This commit is contained in:
Tycho Andersen 2016-09-16 20:26:31 -06:00
parent a0c91fccd9
commit 09e80d0cc4
1 changed files with 2 additions and 1 deletions
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src/lxc/criu.c
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@ -191,7 +191,8 @@ static void exec_criu(struct criu_opts *opts)
return;
}
static_args += 2 * cgroup_num_hierarchies();
if (cgroup_num_hierarchies() > 0)
static_args += 2 * cgroup_num_hierarchies();
if (opts->user->verbose)
static_args++;