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lxc.12246
0002-cgroups-fix-uninitialized-transient_len-wa...
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File 0002-cgroups-fix-uninitialized-transient_len-warning.patch of Package lxc.12246
From 346830421a968c41e3198ca64ab3f7217075e491 Mon Sep 17 00:00:00 2001 From: Aleksa Sarai <cyphar@cyphar.com> Date: Thu, 2 Apr 2020 19:15:11 +1100 Subject: [PATCH] cgroups: fix "uninitialized transient_len" warning Without this change, a build error is triggered if you compile with -Werror=maybe-uninitialized. cgroups/cgfsng.c: In function 'cgfsng_monitor_enter': groups/cgfsng.c:1387:9: error: 'transient_len' may be used uninitialized in this function ret = lxc_writeat(h->cgfd_mon, "cgroup.procs", transient, transient_len); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The issue is that if handler->transient_pid is 0, then transient_len is uninitialised but lxc_writeat(..., transient_len) still gets called. Signed-off-by: Aleksa Sarai <cyphar@cyphar.com> --- src/lxc/cgroups/cgfsng.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/lxc/cgroups/cgfsng.c b/src/lxc/cgroups/cgfsng.c index 564400221fae..21c2c3f7cec5 100644 --- a/src/lxc/cgroups/cgfsng.c +++ b/src/lxc/cgroups/cgfsng.c @@ -1388,7 +1388,7 @@ __cgfsng_ops static bool cgfsng_monitor_enter(struct cgroup_ops *ops, if (ret) return log_error_errno(false, errno, "Failed to enter cgroup \"%s\"", h->monitor_full_path); - if (handler->transient_pid < 0) + if (handler->transient_pid <= 0) return true; ret = lxc_writeat(h->cgfd_mon, "cgroup.procs", transient, transient_len); -- 2.26.0
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