From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58222) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bEvRw-0008Sl-B4 for qemu-devel@nongnu.org; Mon, 20 Jun 2016 05:24:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bEvRq-0006ry-Fa for qemu-devel@nongnu.org; Mon, 20 Jun 2016 05:24:56 -0400 Received: from mx-v6.kamp.de ([2a02:248:0:51::16]:53260 helo=mx01.kamp.de) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bEvRq-0006rY-5v for qemu-devel@nongnu.org; Mon, 20 Jun 2016 05:24:50 -0400 From: Peter Lieven Date: Mon, 20 Jun 2016 11:24:40 +0200 Message-Id: <1466414680-18383-1-git-send-email-pl@kamp.de> Subject: [Qemu-devel] [PATCH] iscsi: fix assertion in is_sector_request_lun_aligned List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, pbonzini@redhat.com, ronniesahlberg@gmail.com, eblake@redhat.com, Peter Lieven Commit 94d047a added an assertion the the request alignment check. This introduced 2 issues: a) A off-by-one error since a request of BDRV_REQUEST_MAX_SECTORS is actually allowed. b) The bdrv_get_block_status call in the read path to check the allocation status requests up to INT_MAX sectors which triggers the assertion. Fixes: 94d047a35bf663e28f8fef137544d8ea78165add Signed-off-by: Peter Lieven --- block/iscsi.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/block/iscsi.c b/block/iscsi.c index 7e78ade..9bb5ff6 100644 --- a/block/iscsi.c +++ b/block/iscsi.c @@ -417,7 +417,7 @@ static bool is_byte_request_lun_aligned(int64_t offset, int count, static bool is_sector_request_lun_aligned(int64_t sector_num, int nb_sectors, IscsiLun *iscsilun) { - assert(nb_sectors < BDRV_REQUEST_MAX_SECTORS); + assert(nb_sectors <= BDRV_REQUEST_MAX_SECTORS); return is_byte_request_lun_aligned(sector_num << BDRV_SECTOR_BITS, nb_sectors << BDRV_SECTOR_BITS, iscsilun); @@ -661,7 +661,8 @@ static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, int64_t ret; int pnum; BlockDriverState *file; - ret = iscsi_co_get_block_status(bs, sector_num, INT_MAX, &pnum, &file); + ret = iscsi_co_get_block_status(bs, sector_num, + BDRV_REQUEST_MAX_SECTORS, &pnum, &file); if (ret < 0) { return ret; } -- 1.9.1