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lxc: always strdup lxc.rootfs.mount

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The reason is that the generic code which handles reading lxc.rootfs.mount
always frees the old value if not NULL. So without this setting
lxc.rootfs.mount = /mnt causes segfault.

This is a backport for lxc-0.9.0 (dora) of the same fix found in
upstream's master, see commits 54c30e29 and 53f3f048.

Signed-off-by: Josep Puigdemont <josep.puigdemont@enea.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
This commit is contained in:
Josep Puigdemont 2014-02-10 14:09:06 +01:00 committed by Bruce Ashfield
parent 7e68875840
commit 7d7c38165c
2 changed files with 28 additions and 0 deletions
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27
recipes-containers/lxc/files/lxc-0.9.0-always-strdup-rootfs-mount.patch Normal file
View File

@ -0,0 +1,27 @@
diff --git a/src/lxc/conf.c b/src/lxc/conf.c
index 6b3f318..2f8b9e6 100644
--- a/src/lxc/conf.c
+++ b/src/lxc/conf.c
@@ -2072,7 +2072,12 @@ struct lxc_conf *lxc_conf_init(void)
new->console.slave = -1;
new->console.name[0] = '\0';
new->maincmd_fd = -1;
- new->rootfs.mount = default_rootfs_mount;
+ new->rootfs.mount = strdup(default_rootfs_mount);
+ if (!new->rootfs.mount) {
+ ERROR("lxc_conf_init : %m");
+ free(new);
+ return NULL;
+ }
new->kmsg = 1;
lxc_list_init(&new->cgroup);
lxc_list_init(&new->network);
@@ -3084,7 +3089,7 @@ void lxc_conf_free(struct lxc_conf *conf)
return;
if (conf->console.path)
free(conf->console.path);
- if (conf->rootfs.mount != default_rootfs_mount)
+ if (conf->rootfs.mount)
free(conf->rootfs.mount);
if (conf->rootfs.path)
free(conf->rootfs.path);

1
recipes-containers/lxc/lxc_0.9.0.bb
View File

@ -26,6 +26,7 @@ SRC_URI = "http://linuxcontainers.org/downloads/${PN}-${PV}.tar.gz \
file://lxc-0.9.0-enable-chroot-chpasswd-functionality-for-busybox-hosts.patch \
file://lxc-0.9.0-check-when-bind-mounting-libdirs.patch \
file://lxc-0.9.0-don-t-let-LXC_PATH-end-in-failure.patch \
file://lxc-0.9.0-always-strdup-rootfs-mount.patch \
"
SRC_URI[md5sum] = "8552a4479090616f4bc04d8473765fc9"
SRC_URI[sha256sum] = "1e1767eae6cc5fbf892c0e193d25da420ba19f2db203716c38f7cdea3b654120"