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utils: use lxc_safe_int()

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Signed-off-by: Christian Brauner <christian.brauner@canonical.com>
This commit is contained in:
Christian Brauner 2016-10-29 12:00:06 +02:00
parent e8ec7c9efc
commit 2d036ccac0
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1 changed files with 4 additions and 2 deletions
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6
src/lxc/utils.c
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@ -1766,7 +1766,7 @@ int mount_proc_if_needed(const char *rootfs)
{ {
char path[MAXPATHLEN]; char path[MAXPATHLEN];
char link[20]; char link[20];
int linklen, ret; int link_to_pid, linklen, ret;
int mypid; int mypid;
ret = snprintf(path, MAXPATHLEN, "%s/proc/self", rootfs); ret = snprintf(path, MAXPATHLEN, "%s/proc/self", rootfs);
@ -1785,7 +1785,9 @@ int mount_proc_if_needed(const char *rootfs)
} }
if (linklen < 0) /* /proc not mounted */ if (linklen < 0) /* /proc not mounted */
goto domount; goto domount;
if (atoi(link) != mypid) { if (lxc_safe_int(link, &link_to_pid) < 0)
return -1;
if (link_to_pid != mypid) {
/* wrong /procs mounted */ /* wrong /procs mounted */
umount2(path, MNT_DETACH); /* ignore failure */ umount2(path, MNT_DETACH); /* ignore failure */
goto domount; goto domount;