This is a note to let you know that I've just added the patch titled
libnvdimm: fix badblock range handling of ARS range
to the 4.9-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:
libnvdimm-fix-badblock-range-handling-of-ars-range.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4e3f0701f25ab194c5362576b1146a1e6cc6c2e7 Mon Sep 17 00:00:00 2001
From: Toshi Kani <toshi.kani@xxxxxxx>
Date: Fri, 7 Jul 2017 17:44:26 -0600
Subject: libnvdimm: fix badblock range handling of ARS range
From: Toshi Kani <toshi.kani@xxxxxxx>
commit 4e3f0701f25ab194c5362576b1146a1e6cc6c2e7 upstream.
__add_badblock_range() does not account sector alignment when
it sets 'num_sectors'. Therefore, an ARS error record range
spanning across two sectors is set to a single sector length,
which leaves the 2nd sector unprotected.
Change __add_badblock_range() to set 'num_sectors' properly.
Fixes: 0caeef63e6d2 ("libnvdimm: Add a poison list and export badblocks")
Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
Reviewed-by: Vishal Verma <vishal.l.verma@xxxxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/nvdimm/core.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -450,14 +450,15 @@ static void set_badblock(struct badblock
static void __add_badblock_range(struct badblocks *bb, u64 ns_offset, u64 len)
{
const unsigned int sector_size = 512;
- sector_t start_sector;
+ sector_t start_sector, end_sector;
u64 num_sectors;
u32 rem;
start_sector = div_u64(ns_offset, sector_size);
- num_sectors = div_u64_rem(len, sector_size, &rem);
+ end_sector = div_u64_rem(ns_offset + len, sector_size, &rem);
if (rem)
- num_sectors++;
+ end_sector++;
+ num_sectors = end_sector - start_sector;
if (unlikely(num_sectors > (u64)INT_MAX)) {
u64 remaining = num_sectors;
Patches currently in stable-queue which might be from toshi.kani@xxxxxxx are
queue-4.9/libnvdimm-btt-fix-btt_rw_page-not-returning-errors.patch
queue-4.9/libnvdimm-fix-badblock-range-handling-of-ars-range.patch