This is a note to let you know that I've just added the patch titled
kdb: Fix off by one error in kdb_cpu()
to the 3.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kdb-fix-off-by-one-error-in-kdb_cpu.patch
and it can be found in the queue-3.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From df0036d117e6c9df36324e517728e33543065f9a Mon Sep 17 00:00:00 2001
From: Jason Wessel <[email protected]>
Date: Thu, 8 Jan 2015 15:46:55 -0600
Subject: kdb: Fix off by one error in kdb_cpu()
From: Jason Wessel <[email protected]>
commit df0036d117e6c9df36324e517728e33543065f9a upstream.
There was a follow on replacement patch against the prior
"kgdb: Timeout if secondary CPUs ignore the roundup".
See: https://lkml.org/lkml/2015/1/7/442
This patch is the delta vs the patch that was committed upstream:
* Fix an off-by-one error in kdb_cpu().
* Replace NR_CPUS with CONFIG_NR_CPUS to tell checkpatch that we
really want a static limit.
* Removed the "KGDB: " prefix from the pr_crit() in debug_core.c
(kgdb-next contains a patch which introduced pr_fmt() to this file
to the tag will now be applied automatically).
Cc: Daniel Thompson <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
kernel/debug/debug_core.c | 2 +-
kernel/debug/kdb/kdb_main.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- a/kernel/debug/debug_core.c
+++ b/kernel/debug/debug_core.c
@@ -604,7 +604,7 @@ return_normal:
online_cpus)
cpu_relax();
if (!time_left)
- pr_crit("KGDB: Timed out waiting for secondary CPUs.\n");
+ pr_crit("Timed out waiting for secondary CPUs.\n");
/*
* At this point the primary processor is completely
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -2256,7 +2256,7 @@ static int kdb_cpu(int argc, const char
/*
* Validate cpunum
*/
- if ((cpunum > NR_CPUS) || !kgdb_info[cpunum].enter_kgdb)
+ if ((cpunum >= CONFIG_NR_CPUS) || !kgdb_info[cpunum].enter_kgdb)
return KDB_BADCPUNUM;
dbg_switch_cpu = cpunum;
Patches currently in stable-queue which might be from
[email protected] are
queue-3.19/kdb-fix-off-by-one-error-in-kdb_cpu.patch
queue-3.19/kdb-avoid-printing-kern_-levels-to-consoles.patch
queue-3.19/kdb-fix-incorrect-counts-in-kdb-summary-command-output.patch
--
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