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Roman Smirnov 5f7fd6aa4c 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 13:07:37 +02:00
..
partitions
block: Move checking GENHD_FL_NO_PART to bdev_add_partition()
2024-01-31 16:19:12 -08:00
badblocks.c
block/badblocks: Remove redundant assignments
2022-04-23 07:15:26 -06:00
bdev.c
block: Provide bdev_open_* functions
2024-03-26 18:19:40 -04:00
bfq-cgroup.c
blkcg: Restructure blkg_conf_prep() and friends
2023-04-13 06:46:49 -06:00
bfq-iosched.c
SCSI misc on 20230629
2023-06-30 11:57:07 -07:00
bfq-iosched.h
block, bfq: remove BFQ_WEIGHT_LEGACY_DFL
2023-04-06 16:17:32 -06:00
bfq-wf2q.c
block, bfq: inject I/O to underutilized actuators
2023-01-29 15:18:33 -07:00
bio-integrity.c
bio-integrity: create multi-page bvecs in bio_integrity_add_page()
2023-08-09 16:05:35 -06:00
bio.c
block: Fix page refcounts for unaligned buffers in __bio_release_pages()
2024-04-03 15:28:27 +02:00
blk-cgroup-fc-appid.c
block: Replace all non-returning strlcpy with strscpy
2023-06-01 09:13:31 -06:00
blk-cgroup-rwstat.c
Revert "blk-cgroup: pin the gendisk in struct blkcg_gq"
2023-02-14 14:24:09 -07:00
blk-cgroup-rwstat.h
block: Use the new blk_opf_t type
2022-07-14 12:14:30 -06:00
blk-cgroup.c
blk-cgroup: bypass blkcg_deactivate_policy after destroying
2023-12-20 17:01:55 +01:00
blk-cgroup.h
blk-cgroup: fix rcu lockdep warning in blkg_lookup()
2024-01-25 15:35:30 -08:00
blk-core.c
block: warn once for each partition in bio_check_ro()
2024-01-20 11:51:38 +01:00
blk-crypto-fallback.c
blk-crypto: dynamically allocate fallback profile
2023-08-18 15:00:39 -06:00
blk-crypto-internal.h
blk-crypto: remove blk_crypto_insert_cloned_request()
2023-03-16 09:35:09 -06:00
blk-crypto-profile.c
blk-crypto: use dynamic lock class for blk_crypto_profile::lock
2023-07-05 16:36:12 -06:00
blk-crypto-sysfs.c
block: make kobj_type structures constant
2023-02-09 09:38:16 -07:00
blk-crypto.c
blk-crypto: make blk_crypto_evict_key() more robust
2023-03-16 09:35:09 -06:00
blk-flush.c
blk-flush: reuse rq queuelist in flush state machine
2023-07-17 08:18:21 -06:00
blk-ia-ranges.c
block: make kobj_type structures constant
2023-02-09 09:38:16 -07:00
blk-integrity.c
blk-integrity: register sysfs attributes on struct device
2023-04-26 18:22:50 -06:00
blk-ioc.c
blk-ioc: fix recursive spin_lock/unlock_irq() in ioc_clear_queue()
2023-06-07 07:51:00 -06:00
blk-iocost.c
blk-iocost: Fix an UBSAN shift-out-of-bounds warning
2024-02-16 19:10:53 +01:00
blk-iolatency.c
block: fix bad lockdep annotation in blk-iolatency
2023-08-10 17:24:53 -06:00
blk-ioprio.c
blk-ioprio: Introduce promote-to-rt policy
2023-06-06 22:26:26 -06:00
blk-ioprio.h
blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit
2022-09-26 19:09:31 -06:00
blk-lib.c
blk-lib: fix blkdev_issue_secure_erase
2022-09-15 00:25:17 -06:00
blk-map.c
block: Fix WARNING in _copy_from_iter
2024-03-01 13:34:49 +01:00
blk-merge.c
blk-mq: release crypto keyslot before reporting I/O complete
2023-03-16 09:35:09 -06:00
blk-mq-cpumap.c
blk-mq: include <linux/blk-mq.h> in block/blk-mq.h
2023-04-13 06:52:29 -06:00
blk-mq-debugfs-zoned.c
block: move zone related fields to struct gendisk
2022-07-06 06:46:26 -06:00
blk-mq-debugfs.c
blk-mq: fix potential io hang by wrong 'wake_batch'
2023-06-12 09:55:53 -06:00
blk-mq-debugfs.h
block: remove per-disk debugfs files in blk_unregister_queue
2022-06-17 07:31:05 -06:00
blk-mq-pci.c
blk-mq: include <linux/blk-mq.h> in block/blk-mq.h
2023-04-13 06:52:29 -06:00
blk-mq-sched.c
blk-mq: cleanup __blk_mq_sched_dispatch_requests
2023-04-13 06:57:18 -06:00
blk-mq-sched.h
blk-mq: make sure elevator callbacks aren't called for passthrough request
2023-05-18 19:42:54 -06:00
blk-mq-sysfs.c
blk-mq: include <linux/blk-mq.h> in block/blk-mq.h
2023-04-13 06:52:29 -06:00
blk-mq-tag.c
for-6.5/block-2023-06-23
2023-06-26 12:47:20 -07:00
blk-mq-virtio.c
blk-mq: include <linux/blk-mq.h> in block/blk-mq.h
2023-04-13 06:52:29 -06:00
blk-mq.c
block: Do not force full zone append completion in req_bio_endio()
2024-04-03 15:28:56 +02:00
blk-mq.h
blk-mq: fix potential io hang by wrong 'wake_batch'
2023-06-12 09:55:53 -06:00
blk-pm.c
blk-mq: include <linux/blk-mq.h> in block/blk-mq.h
2023-04-13 06:52:29 -06:00
blk-pm.h
block: Remove unused blk_pm_*() function definitions
2021-02-22 06:33:48 -07:00
blk-rq-qos.c
block: correct stale comment in rq_qos_wait
2023-09-18 14:15:28 -06:00
blk-rq-qos.h
blk-iolatency: s/blkcg_rq_qos/iolat_rq_qos/
2023-04-13 06:46:49 -06:00
blk-settings.c
block: Clear zone limits for a non-zoned stacked queue
2024-04-03 15:28:20 +02:00
blk-stat.c
block: prevent division by zero in blk_rq_stat_sum()
2024-04-13 13:07:37 +02:00
blk-stat.h
block: make queue stat accounting a reference
2021-12-14 17:23:05 -07:00
blk-sysfs.c
block: don't allow enabling a cache on devices that don't support it
2023-07-17 08:18:18 -06:00
blk-throttle.c
blk-throttle: fix lockdep warning of "cgroup_mutex or RCU read lock required!"
2023-12-20 17:01:55 +01:00
blk-throttle.h
blk-throttle: print signed value 'carryover_bytes/ios' for user
2023-08-30 10:15:01 -06:00
blk-timeout.c
block: blk-timeout: delete duplicated word
2020-07-31 16:29:47 -06:00
blk-wbt.c
blk-wbt: Fix detection of dirty-throttled tasks
2024-02-23 09:25:16 +01:00
blk-wbt.h
blk-wbt: don't create wbt sysfs entry if CONFIG_BLK_WBT is disabled
2023-06-26 09:53:36 -06:00
blk-zoned.c
Merge branch '6.5/scsi-staging' into 6.5/scsi-fixes
2023-07-11 12:15:15 -04:00
blk.h
block: Add some exports for bcachefs
2023-08-14 15:40:42 -06:00
bounce.c
block: change the blk_queue_bounce calling convention
2022-08-02 17:22:54 -06:00
bsg-lib.c
scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool
2023-06-12 08:04:04 -06:00
bsg.c
SCSI misc on 20230629
2023-06-30 11:57:07 -07:00
disk-events.c
block: fix kernel-doc for disk_force_media_change()
2023-09-26 00:43:34 -06:00
early-lookup.c
block: don't return -EINVAL for not found names in devt_from_devname
2023-06-22 09:09:33 -06:00
elevator.c
blk-mq: release scheduler resource when request completes
2023-08-19 07:47:17 -06:00
elevator.h
blk-mq: pass a flags argument to elevator_type->insert_requests
2023-04-13 06:52:30 -06:00
fops.c
block: Don't invalidate pagecache for invalid falloc modes
2023-10-11 15:53:17 -06:00
genhd.c
block: add check of 'minors' and 'first_minor' in device_add_disk()
2024-01-25 15:35:27 -08:00
holder.c
block: don't allow a disk link holder to itself
2022-11-16 15:19:56 -07:00
ioctl.c
block: Move checking GENHD_FL_NO_PART to bdev_add_partition()
2024-01-31 16:19:12 -08:00
ioprio.c
scsi: block: Improve ioprio value validity checks
2023-06-16 12:04:30 -04:00
Kconfig
block: sed-opal: keyring support for SED keys
2023-08-22 11:10:26 -06:00
Kconfig.iosched
block: Default to use cgroup support for BFQ
2023-01-30 09:42:42 -07:00
kyber-iosched.c
blk-mq: pass a flags argument to elevator_type->insert_requests
2023-04-13 06:52:30 -06:00
Makefile
block: move the code to do early boot lookup of block devices to block/
2023-06-05 10:57:40 -06:00
mq-deadline.c
Revert "block/mq-deadline: use correct way to throttling write requests"
2024-04-03 15:28:33 +02:00
opal_proto.h
block: sed-opal: handle empty atoms when parsing response
2024-03-26 18:19:12 -04:00
sed-opal.c
block: sed-opal: handle empty atoms when parsing response
2024-03-26 18:19:12 -04:00
t10-pi.c
block: add pi for extended integrity
2022-03-07 12:48:35 -07:00