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Message-Id: <20220705115617.872093890@linuxfoundation.org>
Date: Tue, 5 Jul 2022 13:57:28 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Chris Ye <chris.ye@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>,
Dan Williams <dan.j.williams@...el.com>
Subject: [PATCH 5.15 10/98] nvdimm: Fix badblocks clear off-by-one error
From: Chris Ye <chris.ye@...el.com>
commit ef9102004a87cb3f8b26e000a095a261fc0467d3 upstream.
nvdimm_clear_badblocks_region() validates badblock clearing requests
against the span of the region, however it compares the inclusive
badblock request range to the exclusive region range. Fix up the
off-by-one error.
Fixes: 23f498448362 ("libnvdimm: rework region badblocks clearing")
Cc: <stable@...r.kernel.org>
Signed-off-by: Chris Ye <chris.ye@...el.com>
Reviewed-by: Vishal Verma <vishal.l.verma@...el.com>
Link: https://lore.kernel.org/r/165404219489.2445897.9792886413715690399.stgit@dwillia2-xfh
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/nvdimm/bus.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -185,8 +185,8 @@ static int nvdimm_clear_badblocks_region
ndr_end = nd_region->ndr_start + nd_region->ndr_size - 1;
/* make sure we are in the region */
- if (ctx->phys < nd_region->ndr_start
- || (ctx->phys + ctx->cleared) > ndr_end)
+ if (ctx->phys < nd_region->ndr_start ||
+ (ctx->phys + ctx->cleared - 1) > ndr_end)
return 0;
sector = (ctx->phys - nd_region->ndr_start) / 512;
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