The patch titled
Subject: proc: fix -ESRCH error when writing to /proc/$pid/coredump_filter
has been added to the -mm tree. Its filename is
proc-fix-esrch-error-when-writing-to-proc-pid-coredump_filter.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/proc-fix-esrch-error-when-writing-to-proc-pid-coredump_filter.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/proc-fix-esrch-error-when-writing-to-proc-pid-coredump_filter.patch
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------------------------------------------------------
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Subject: proc: fix -ESRCH error when writing to /proc/$pid/coredump_filter
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()")
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Acked-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [4.3+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/base.c | 1 +
1 file changed, 1 insertion(+)
diff -puN fs/proc/base.c~proc-fix-esrch-error-when-writing-to-proc-pid-coredump_filter fs/proc/base.c
--- a/fs/proc/base.c~proc-fix-esrch-error-when-writing-to-proc-pid-coredump_filter
+++ a/fs/proc/base.c
@@ -2494,6 +2494,7 @@ static ssize_t proc_coredump_filter_writ
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)
_
Patches currently in -mm which might be from colin.king@xxxxxxxxxxxxx are
proc-fix-esrch-error-when-writing-to-proc-pid-coredump_filter.patch
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