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bfc0647791
android_kernel_xiaomi_sm8450/block
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Matthew Wilcox (Oracle) bfc0647791 block: Remove special-casing of compound pages 
commit 1b151e2435fc3a9b10c8946c6aebe9f3e1938c55 upstream.

The special casing was originally added in pre-git history; reproducing
the commit log here:

> commit a318a92567d77
> Author: Andrew Morton <akpm@osdl.org>
> Date:   Sun Sep 21 01:42:22 2003 -0700
>
>     [PATCH] Speed up direct-io hugetlbpage handling
>
>     This patch short-circuits all the direct-io page dirtying logic for
>     higher-order pages.  Without this, we pointlessly bounce BIOs up to
>     keventd all the time.

In the last twenty years, compound pages have become used for more than
just hugetlb.  Rewrite these functions to operate on folios instead
of pages and remove the special case for hugetlbfs; I don't think
it's needed any more (and if it is, we can put it back in as a call
to folio_test_hugetlb()).

This was found by inspection; as far as I can tell, this bug can lead
to pages used as the destination of a direct I/O read not being marked
as dirty.  If those pages are then reclaimed by the MM without being
dirtied for some other reason, they won't be written out.  Then when
they're faulted back in, they will not contain the data they should.
It'll take a pretty unusual setup to produce this problem with several
races all going the wrong way.

This problem predates the folio work; it could for example have been
triggered by mmaping a THP in tmpfs and using that as the target of an
O_DIRECT read.

Fixes: 800d8c63b2 ("shmem: add huge pages support")
Cc:  <stable@vger.kernel.org>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-02-23 08:41:54 +01:00
..
partitions block/partition: fix signedness issue for Amiga partitions 2023-07-27 08:44:18 +02:00
badblocks.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
bfq-cgroup.c block, bfq: fix uaf for bfqq in bic_set_bfqq() 2023-03-17 08:45:14 +01:00
bfq-iosched.c block, bfq: fix uaf for bfqq in bic_set_bfqq() 2023-03-17 08:45:14 +01:00
bfq-iosched.h bfq: Get rid of __bio_blkcg() usage 2022-06-09 10:21:31 +02:00
bfq-wf2q.c bfq: fix blkio cgroup leakage v4 2020-08-18 07:48:08 -07:00
bio-integrity.c block: bio-integrity: Copy flags when bio_integrity_payload is cloned 2023-03-11 16:39:16 +01:00
bio.c block: Remove special-casing of compound pages 2024-02-23 08:41:54 +01:00
blk-cgroup-rwstat.c blk-cgroup: Fix the recursive blkg rwstat 2021-03-30 14:31:48 +02:00
blk-cgroup-rwstat.h blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT 2019-11-07 12:28:13 -07:00
blk-cgroup.c blk-cgroup: fix missing pd_online_fn() while activating policy 2023-02-06 07:56:15 +01:00
blk-core.c block: fix use-after-free of q->q_usage_counter 2023-10-10 21:53:36 +02:00
blk-crypto-fallback.c block: rename generic_make_request to submit_bio_noacct 2020-07-01 07:27:24 -06:00
blk-crypto-internal.h blk-mq: release crypto keyslot before reporting I/O complete 2023-05-17 11:47:32 +02:00
blk-crypto.c blk-crypto: make blk_crypto_evict_key() more robust 2023-05-17 11:47:32 +02:00
blk-exec.c block: add a blk_account_io_merge_bio helper 2020-05-27 05:21:23 -06:00
blk-flush.c block: Fix fsync always failed if once failed 2022-01-27 10:54:30 +01:00
blk-integrity.c block: flush the integrity workqueue in blk_integrity_unregister 2021-09-30 10:11:06 +02:00
blk-ioc.c block: remove retry loop in ioc_release_fn() 2020-07-16 10:22:15 -06:00
blk-iocost.c blk-iocost: use spin_lock_irqsave in adjust_inuse_and_calc_cost 2023-07-27 08:43:32 +02:00
blk-iolatency.c blk-iolatency: Fix inflight count imbalances and IO hangs on offline 2022-06-09 10:21:29 +02:00
blk-lib.c block: add a bdev_is_partition helper 2020-09-25 08:18:57 -06:00
blk-map.c block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern 2022-05-12 12:25:45 +02:00
blk-merge.c blk-mq: release crypto keyslot before reporting I/O complete 2023-05-17 11:47:32 +02:00
blk-mq-cpumap.c blk-mq: remove the calling of local_memory_node() 2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c block: Cleanup license notice 2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c blk-mq: don't create hctx debugfs dir until q->debugfs_dir is created 2022-08-21 15:15:35 +02:00
blk-mq-debugfs.h blk-mq: no need to check return value of debugfs_create functions 2019-06-13 03:00:30 -06:00
blk-mq-pci.c block: Fix blk_mq_*_map_queues() kernel-doc headers 2019-05-31 15:12:34 -06:00
blk-mq-rdma.c block: Fix blk_mq_*_map_queues() kernel-doc headers 2019-05-31 15:12:34 -06:00
blk-mq-sched.c blk-mq: correct stale comment of .get_budget 2023-03-11 16:39:15 +01:00
blk-mq-sched.h block-5.10-2020-10-12 2020-10-13 12:12:44 -07:00
blk-mq-sysfs.c blk-mq: fix possible memleak when register 'hctx' failed 2023-01-14 10:16:19 +01:00
blk-mq-tag.c blk-mq: avoid to iterate over stale request 2021-09-30 10:11:05 +02:00
blk-mq-tag.h blk-mq: clear stale request in tags->rq[] before freeing one request pool 2021-07-14 16:55:58 +02:00
blk-mq-virtio.c blk-mq: Fix typo in comment 2020-03-17 20:55:21 +01:00
blk-mq.c blk-mq: release crypto keyslot before reporting I/O complete 2023-05-17 11:47:32 +02:00
blk-mq.h blk-mq: grab rq->refcount before calling ->fn in blk_mq_tagset_busy_iter 2021-07-14 16:55:58 +02:00
blk-pm.c scsi: block: pm: Always set request queue runtime active in blk_post_runtime_resume() 2022-01-27 10:54:08 +01:00
blk-pm.h scsi: block: Do not accept any requests while suspended 2021-01-12 20:18:17 +01:00
blk-rq-qos.c rq-qos: fix missed wake-ups in rq_qos_throttle try two 2021-07-19 09:45:00 +02:00
blk-rq-qos.h block: fix race between adding/removing rq qos and normal IO 2021-07-14 16:56:00 +02:00
blk-settings.c blk-settings: align max_sectors on "logical_block_size" boundary 2021-03-04 11:38:22 +01:00
blk-stat.c blk-stat: make q->stats->lock irqsafe 2020-09-01 16:48:46 -06:00
blk-stat.h block: deactivate blk_stat timer in wbt_disable_default() 2018-12-12 06:47:51 -07:00
blk-sysfs.c block: fix use-after-free of q->q_usage_counter 2023-10-10 21:53:36 +02:00
blk-throttle.c blk-throttle: fix lockdep warning of "cgroup_mutex or RCU read lock required!" 2023-12-20 15:44:31 +01:00
blk-timeout.c block: blk-timeout: delete duplicated word 2020-07-31 16:29:47 -06:00
blk-wbt.c blk-wbt: fix that 'rwb->wc' is always set to 1 in wbt_init() 2022-10-30 09:41:19 +01:00
blk-wbt.h blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled() 2021-07-14 16:56:12 +02:00
blk-zoned.c blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN 2021-09-18 13:40:06 +02:00
blk.h block: bump max plugged deferred size from 16 to 32 2021-11-18 14:03:57 +01:00
bounce.c block: make bio_crypt_clone() able to fail 2020-10-05 10:47:43 -06:00
bsg-lib.c block: drop double zeroing 2020-09-23 09:18:13 -06:00
bsg.c scsi: bsg: Remove support for SCSI_IOCTL_SEND_COMMAND 2021-09-18 13:40:11 +02:00
cmdline-parser.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
elevator.c block/wbt: fix negative inflight counter when remove scsi device 2022-02-23 12:01:04 +01:00
genhd.c block: Suppress uevent for hidden device when removed 2021-03-30 14:31:52 +02:00
ioctl.c block/compat_ioctl: fix range check in BLKGETSIZE 2022-04-27 13:53:57 +02:00
ioprio.c block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2) 2021-12-14 11:32:40 +01:00
Kconfig blk-wbt: Remove obsolete multiqueue I/O scheduling comment 2020-09-01 16:49:26 -06:00
Kconfig.iosched treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
keyslot-manager.c blk-crypto: make blk_crypto_evict_key() more robust 2023-05-17 11:47:32 +02:00
kyber-iosched.c kyber: fix out of bounds access when preempted 2021-05-19 10:13:13 +02:00
Makefile blk-mq: merge blk-softirq.c into blk-mq.c 2020-06-24 09:15:56 -06:00
mq-deadline.c block: return ELEVATOR_DISCARD_MERGE if possible 2021-09-15 09:50:28 +02:00
opal_proto.h block: sed-opal: Change the check condition for regular session validity 2020-03-12 08:00:10 -06:00
scsi_ioctl.c drivers-5.10-2020-10-12 2020-10-13 13:04:41 -07:00
sed-opal.c block: sed-opal: kmalloc the cmd/resp buffers 2022-11-25 17:45:43 +01:00
t10-pi.c block: Allow t10-pi to be modular 2020-01-06 20:59:04 -07:00