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Roman Smirnov b0cb5564c3 block: prevent division by zero in blk_rq_stat_sum() 
[ Upstream commit 93f52fbeaf4b676b21acfe42a5152620e6770d02 ]

The expression dst->nr_samples + src->nr_samples may
have zero value on overflow. It is necessary to add
a check to avoid division by zero.

Found by Linux Verification Center (linuxtesting.org) with Svace.

Signed-off-by: Roman Smirnov <r.smirnov@omp.ru>
Reviewed-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/20240305134509.23108-1-r.smirnov@omp.ru
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-04-13 12:59:49 +02:00
..
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: prevent an integer overflow in bvec_try_merge_hw_page
2024-02-23 08:42:09 +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: Fix an UBSAN shift-out-of-bounds warning
2024-02-23 08:42:21 +01:00
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: fix IO hang from sbitmap wakeup race
2024-02-23 08:42:14 +01:00
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
block: Clear zone limits for a non-zoned stacked queue
2024-04-13 12:58:07 +02:00
blk-stat.c
block: prevent division by zero in blk_rq_stat_sum()
2024-04-13 12:59:49 +02:00
blk-stat.h
…
blk-sysfs.c
block: introduce zone_write_granularity limit
2024-04-13 12:58:07 +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
…
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: add check that partition length needs to be aligned with block size
2024-04-13 12:59:23 +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: handle empty atoms when parsing response
2024-03-26 18:21:46 -04:00
scsi_ioctl.c
drivers-5.10-2020-10-12
2020-10-13 13:04:41 -07:00
sed-opal.c
block: sed-opal: handle empty atoms when parsing response
2024-03-26 18:21:46 -04:00
t10-pi.c
block: Allow t10-pi to be modular
2020-01-06 20:59:04 -07:00