fs/proc/array.c: set overflow flag in case of error
For now in task_name() we ignore the return code of string_escape_str()
call. This is not good if buffer suddenly becomes not big enough. Do the
proper error handling there.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/proc/array.c b/fs/proc/array.c
index eed2050..d73291f 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -91,18 +91,18 @@
static inline void task_name(struct seq_file *m, struct task_struct *p)
{
char *buf;
+ size_t size;
char tcomm[sizeof(p->comm)];
+ int ret;
get_task_comm(tcomm, p);
seq_puts(m, "Name:\t");
- buf = m->buf + m->count;
- /* Ignore error for now */
- buf += string_escape_str(tcomm, buf, m->size - m->count,
- ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
+ size = seq_get_buf(m, &buf);
+ ret = string_escape_str(tcomm, buf, size, ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
+ seq_commit(m, ret < size ? ret : -1);
- m->count = buf - m->buf;
seq_putc(m, '\n');
}