Return ENOENT when reading /proc/{pid}/task of an exited process

There will be a deadloop when we use getdents to read /proc/{pid}/task
of an exited process

Like this:

Process A is running
                         Process B: open /proc/{pid of A}/task
Process A exits
                         Process B: getdents /proc/{pid of A}/task

Then, process B will fall into deadloop, and return "." and ".."
in loops and never ends.

This patch returns ENOENT when use getdents to read /proc/{pid}/task
if the process is just exited.

Signed-off-by: chris.zn <chris.zn@antfin.com>

0 files changed, 0 insertions, 0 deletions