[PATCH] proc: fix /proc/*/coredump_filter write return value

[Alexey Dobriyan]

From: Joshua Baergen <joshuabaergen@xxxxxxxxx>

https://bugzilla.kernel.org/show_bug.cgi?id=107321

commit 774636e19ed514cdf560006813c0473409616de8
("proc: convert to kstrto*()/kstrto*_from_user()")

made write to /proc/*/coredump_filter always return -ESRCH
(still new value was applied correctly).

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---

 fs/proc/base.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2503,6 +2503,7 @@ static ssize_t proc_coredump_filter_write(struct file *file,
 	}
 
 	mmput(mm);
+	ret = 0;
  out_no_mm:
 	put_task_struct(task);
  out_no_task:
--
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