From: Colin Ian King <[email protected]>
echo 0 > /proc/self/coredump_filter
bash: echo: write error: No such process
Writing to /proc/$pid/coredump_filter always returns -ESRCH because
commit 774636e19ed51 ("proc: convert to kstrto*()/kstrto*_from_user()")
removed the setting of ret after the get_proc_task call and incorrectly
left it as -ESRCH. Instead, return 0 when successful.
Fixes: 774636e19ed51 ("proc: convert to kstrto*()/kstrto*_from_user()")
Cc: <[email protected]> [v4.3+]
Signed-off-by: Colin Ian King <[email protected]>
---
fs/proc/base.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/proc/base.c b/fs/proc/base.c
index bd3e9e6..4bd5d31 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2494,6 +2494,7 @@ static ssize_t proc_coredump_filter_write(struct file
*file,
mm = get_task_mm(task);
if (!mm)
goto out_no_mm;
+ ret = 0;
for (i = 0, mask = 1; i < MMF_DUMP_FILTER_BITS; i++, mask <<= 1) {
if (val & mask)
--
2.6.3
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