linux-kernel - [PATCH 4.14 01/29] nvdimm: Fix badblocks clear off-by-one error

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220705115606.379999939@linuxfoundation.org>
Date:   Tue,  5 Jul 2022 13:57:49 +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 4.14 01/29] 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
@@ -192,8 +192,8 @@ 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;