diff options
| author | Damien Le Moal <damien.lemoal@wdc.com> | 2019-07-01 14:09:18 +0900 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-07-11 20:04:40 -0600 |
| commit | 26202928fafad8bda8b478edb7e62c885be623d7 (patch) | |
| tree | 9935d814339a8951e0e709380dc9aad55751387a /include/linux/blkdev.h | |
| parent | b091ac616846a1da75b1f2566b41255ce7f0e0a6 (diff) | |
| download | linux-26202928fafad8bda8b478edb7e62c885be623d7.tar.gz linux-26202928fafad8bda8b478edb7e62c885be623d7.tar.bz2 linux-26202928fafad8bda8b478edb7e62c885be623d7.zip | |
block: Limit zone array allocation size
Limit the size of the struct blk_zone array used in
blk_revalidate_disk_zones() to avoid memory allocation failures leading
to disk revalidation failure. Also further reduce the likelyhood of
such failures by using kvcalloc() (that is vmalloc()) instead of
allocating contiguous pages with alloc_pages().
Fixes: 515ce6061312 ("scsi: sd_zbc: Fix sd_zbc_report_zones() buffer allocation")
Fixes: e76239a3748c ("block: add a report_zones method")
Cc: stable@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 05036e3e3458..1ef375dafb1c 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -344,6 +344,11 @@ struct queue_limits { #ifdef CONFIG_BLK_DEV_ZONED +/* + * Maximum number of zones to report with a single report zones command. + */ +#define BLK_ZONED_REPORT_MAX_ZONES 8192U + extern unsigned int blkdev_nr_zones(struct block_device *bdev); extern int blkdev_report_zones(struct block_device *bdev, sector_t sector, struct blk_zone *zones, |