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6c6b354914
linux/drivers/block
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Christoph Hellwig 6c6b354914 block: set the zone size in blk_revalidate_disk_zones atomically 
The current zone revalidation code has a major problem in that it
doesn't update the zone size and q->nr_zones atomically, leading
to a short window where an out of bounds access to the zone arrays
is possible.

To fix this move the setting of the zone size into the crticial
sections blk_revalidate_disk_zones so that it gets updated together
with the zone bitmaps and q->nr_zones.  This also slightly simplifies
the caller as it deducts the zone size from the report_zones.

This change also allows to check for a power of two zone size in generic
code.

Reported-by: Hans Holmberg <hans@owltronix.com>
Reviewed-by: Javier González <javier@javigon.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-12-03 10:18:22 -07:00
..
aoe block: aoe: Fix kernel crash due to atomic sleep when exiting 2019-08-08 07:29:02 -06:00
drbd drbd: Remove unneeded semicolon 2019-11-28 10:40:44 -07:00
mtip32xx block: mtip32xx: Spelling s/configration/configuration/ 2019-10-25 14:31:07 -06:00
paride paride/pcd: need to check if cd->disk is null in pcd_detect 2019-09-04 07:04:37 -06:00
rsxx rsxx: add missed destroy_workqueue calls in remove 2019-11-14 13:59:49 -07:00
xen-blkback xen/blkback: fix memory leaks 2019-08-12 08:18:37 -06:00
zram zram: fix race between backing_dev_show and backing_dev_store 2019-10-19 06:32:32 -04:00
amiflop.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
ataflop.c ataflop: Remove unneeded semicolon 2019-11-28 10:40:47 -07:00
brd.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
cryptoloop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 30 2019-05-24 17:27:10 +02:00
floppy.c floppy: fix usercopy direction 2019-08-09 07:41:36 -06:00
Kconfig docs: blockdev: add it to the admin-guide 2019-07-15 11:03:01 -03:00
loop.c block: remove (__)blkdev_reread_part as an exported API 2019-11-14 07:43:59 -07:00
loop.h block/loop: Use global lock for ioctl() operation. 2018-11-08 06:30:11 -07:00
Makefile drivers/block: Remove DAC960 driver 2018-10-17 09:42:30 -06:00
nbd.c for-5.5/drivers-post-20191122 2019-11-25 11:18:03 -08:00
null_blk_main.c block: set the zone size in blk_revalidate_disk_zones atomically 2019-12-03 10:18:22 -07:00
null_blk_zoned.c for-5.5/drivers-20191121 2019-11-25 11:15:41 -08:00
null_blk.h block: rework zone reporting 2019-11-12 19:12:07 -07:00
pktcdvd.c pktcdvd: add compat_ioctl handler 2019-10-23 17:23:47 +02:00
ps3disk.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 164 2019-05-30 11:26:38 -07:00
ps3vram.c block/ps3vram: Use %llu to format sector_t after LBDAF removal 2019-06-13 03:17:50 -06:00
rbd_types.h rbd: support for object-map and fast-diff 2019-07-08 14:01:45 +02:00
rbd.c rbd: silence bogus uninitialized warning in rbd_object_map_update_finish() 2019-11-14 19:00:53 +01:00
skd_main.c Linux 5.2-rc6 2019-07-01 08:16:08 -06:00
skd_s1120.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 497 2019-06-19 17:09:53 +02:00
sunvdc.c block: sunvdc: Remove unneeded semicolon 2019-11-28 10:40:46 -07:00
swim3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
swim_asm.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
swim.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sx8.c sx8: use a per-host tag_set 2018-11-09 08:14:14 -07:00
umem.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 349 2019-06-05 17:37:08 +02:00
umem.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 348 2019-06-05 17:37:08 +02:00
virtio_blk.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
xen-blkfront.c xen-blkfront: switch kcalloc to kvcalloc for large array allocation 2019-06-03 22:16:19 -04:00
xsysace.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
z2ram.c powerpc updates for 4.20 2018-10-26 14:36:21 -07:00