Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx> --- fs/proc/thread_self.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/fs/proc/thread_self.c b/fs/proc/thread_self.c index f61ae53533f5..c29d37e3bd28 100644 --- a/fs/proc/thread_self.c +++ b/fs/proc/thread_self.c @@ -15,14 +15,20 @@ static const char *proc_thread_self_get_link(struct dentry *dentry, struct pid_namespace *ns = proc_pid_ns(inode); pid_t tgid = task_tgid_nr_ns(current, ns); pid_t pid = task_pid_nr_ns(current, ns); + char buf[10 + 6 + 10 + 1]; + char *p = buf + sizeof(buf); char *name; if (!pid) return ERR_PTR(-ENOENT); - name = kmalloc(10 + 6 + 10 + 1, dentry ? GFP_KERNEL : GFP_ATOMIC); + name = kmalloc(sizeof(buf), dentry ? GFP_KERNEL : GFP_ATOMIC); if (unlikely(!name)) return dentry ? ERR_PTR(-ENOMEM) : ERR_PTR(-ECHILD); - sprintf(name, "%u/task/%u", tgid, pid); + *--p = '\0'; + p = _print_integer_u32(p, pid); + p = memcpy(p - 6, "/task/", 6); + p = _print_integer_u32(p, tgid); + memcpy(name, p, buf + sizeof(buf) - p); set_delayed_call(done, kfree_link, name); return name; } -- 2.24.1
