The patch titled
Better documentation for ERESTARTSYS
has been added to the -mm tree. Its filename is
better-documentation-for-erestartsys.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Better documentation for ERESTARTSYS
From: Satoru Takeuchi <takeuchi_satoru@xxxxxxxxxxxxxx>
Add comment for errnos related to restart syscall to avoid the leakage of
them to user programs.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@xxxxxxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Acked-by: Roland McGrath <roland@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/errno.h | 7 ++++++-
1 files changed, 6 insertions(+), 1 deletion(-)
diff -puN include/linux/errno.h~better-documentation-for-erestartsys include/linux/errno.h
--- a/include/linux/errno.h~better-documentation-for-erestartsys
+++ a/include/linux/errno.h
@@ -5,7 +5,12 @@
#ifdef __KERNEL__
-/* Should never be seen by user programs */
+/*
+ * These should never be seen by user programs. To return one of ERESTART*
+ * codes, signal_pending() MUST be set. Note that ptrace can observe these
+ * at syscall exit tracing, but they will never be left for the debugged user
+ * process to see.
+ */
#define ERESTARTSYS 512
#define ERESTARTNOINTR 513
#define ERESTARTNOHAND 514 /* restart if no handler.. */
_
Patches currently in -mm which might be from takeuchi_satoru@xxxxxxxxxxxxxx are
git-input.patch
tty-fix-leakage-of-erestartsys-to-userland.patch
better-documentation-for-erestartsys.patch
fix-stop_machine_run-problem-with-naughty-real-time-process.patch
cpu-hotplug-fix-ksoftirqd-termination-on-cpu-hotplug-with-naughty-realtime-process.patch
cpu-hotplug-fix-ksoftirqd-termination-on-cpu-hotplug-with-naughty-realtime-process-fix.patch
-
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