From: Damien Le Moal Date: Sat, 15 Nov 2025 12:15:51 +0000 (+0900) Subject: zloop: make the write pointer of full zones invalid X-Git-Tag: v6.18.3~29 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3846f8f781cc2758cbb40f99b9765954b1a5b568;p=thirdparty%2Fkernel%2Fstable.git zloop: make the write pointer of full zones invalid commit 866d65745b635927c3d1343ab67e6fd4a99d116d upstream. The write pointer of zones that are in the full condition is always invalid. Reflect that fact by setting the write pointer of full zones to ULLONG_MAX. Fixes: eb0570c7df23 ("block: new zoned loop block device driver") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/block/zloop.c b/drivers/block/zloop.c index e0123c16040d7..39a425db670c8 100644 --- a/drivers/block/zloop.c +++ b/drivers/block/zloop.c @@ -177,7 +177,7 @@ static int zloop_update_seq_zone(struct zloop_device *zlo, unsigned int zone_no) zone->wp = zone->start; } else if (file_sectors == zlo->zone_capacity) { zone->cond = BLK_ZONE_COND_FULL; - zone->wp = zone->start + zlo->zone_size; + zone->wp = ULLONG_MAX; } else { zone->cond = BLK_ZONE_COND_CLOSED; zone->wp = zone->start + file_sectors; @@ -326,7 +326,7 @@ static int zloop_finish_zone(struct zloop_device *zlo, unsigned int zone_no) } zone->cond = BLK_ZONE_COND_FULL; - zone->wp = zone->start + zlo->zone_size; + zone->wp = ULLONG_MAX; clear_bit(ZLOOP_ZONE_SEQ_ERROR, &zone->flags); unlock: @@ -437,8 +437,10 @@ static void zloop_rw(struct zloop_cmd *cmd) * copmpletes. */ zone->wp += nr_sectors; - if (zone->wp == zone_end) + if (zone->wp == zone_end) { zone->cond = BLK_ZONE_COND_FULL; + zone->wp = ULLONG_MAX; + } } rq_for_each_bvec(tmp, rq, rq_iter)