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authorBart Van Assche <bart.vanassche@wdc.com>2018-05-22 08:27:22 -0700
committerJens Axboe <axboe@kernel.dk>2018-05-22 11:58:07 -0600
commit327ea4adcfa37194739f1ec7c70568944d292281 (patch)
treea3f70b1f6e68f81a124a972543b468ab556d8dba /block
parent2189c97cdbed630d5971ab22f05dc998774e354e (diff)
blkdev_report_zones_ioctl(): Use vmalloc() to allocate large buffers
Avoid that complaints similar to the following appear in the kernel log if the number of zones is sufficiently large: fio: page allocation failure: order:9, mode:0x140c0c0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null) Call Trace: dump_stack+0x63/0x88 warn_alloc+0xf5/0x190 __alloc_pages_slowpath+0x8f0/0xb0d __alloc_pages_nodemask+0x242/0x260 alloc_pages_current+0x6a/0xb0 kmalloc_order+0x18/0x50 kmalloc_order_trace+0x26/0xb0 __kmalloc+0x20e/0x220 blkdev_report_zones_ioctl+0xa5/0x1a0 blkdev_ioctl+0x1ba/0x930 block_ioctl+0x41/0x50 do_vfs_ioctl+0xaa/0x610 SyS_ioctl+0x79/0x90 do_syscall_64+0x79/0x1b0 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Fixes: 3ed05a987e0f ("blk-zoned: implement ioctls") Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Cc: Shaun Tancheff <shaun.tancheff@seagate.com> Cc: Damien Le Moal <damien.lemoal@hgst.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Martin K. Petersen <martin.petersen@oracle.com> Cc: Hannes Reinecke <hare@suse.com> Cc: <stable@vger.kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-zoned.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/block/blk-zoned.c b/block/blk-zoned.c
index 08e84ef2bc05..3d08dc84db16 100644
--- a/block/blk-zoned.c
+++ b/block/blk-zoned.c
@@ -328,7 +328,11 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
if (!rep.nr_zones)
return -EINVAL;
- zones = kcalloc(rep.nr_zones, sizeof(struct blk_zone), GFP_KERNEL);
+ if (rep.nr_zones > INT_MAX / sizeof(struct blk_zone))
+ return -ERANGE;
+
+ zones = kvmalloc(rep.nr_zones * sizeof(struct blk_zone),
+ GFP_KERNEL | __GFP_ZERO);
if (!zones)
return -ENOMEM;
@@ -350,7 +354,7 @@ int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
}
out:
- kfree(zones);
+ kvfree(zones);
return ret;
}