linux-stable/block
Roman Smirnov 6a55dab4ac block: prevent division by zero in blk_rq_stat_sum()
[ Upstream commit 93f52fbeaf ]

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 12:50:16 +02:00
..
partitions block: fix signed int overflow in Amiga partition support 2023-08-30 16:31:46 +02:00
Kconfig block: introduce blk-iolatency io controller 2018-07-09 09:07:54 -06:00
Kconfig.iosched
Makefile block: introduce blk-iolatency io controller 2018-07-09 09:07:54 -06:00
badblocks.c
bfq-cgroup.c block, bfq: fix overwrite of bfq_group pointer in bfq_find_set_group() 2020-03-25 08:06:08 +01:00
bfq-iosched.c block, bfq: protect 'bfqd->queued' by 'bfqd->lock' 2022-11-10 17:46:54 +01:00
bfq-iosched.h block, bfq: fix use after free in bfq_bfqq_expire 2021-12-29 12:20:43 +01:00
bfq-wf2q.c block, bfq: fix use after free in bfq_bfqq_expire 2021-12-29 12:20:43 +01:00
bio-integrity.c block: bio-integrity: Copy flags when bio_integrity_payload is cloned 2023-03-11 16:31:33 +01:00
bio.c block: Remove special-casing of compound pages 2024-02-23 08:12:40 +01:00
blk-cgroup.c bdi: use bdi_dev_name() to get device name 2021-08-08 08:54:29 +02:00
blk-core.c block: fix and cleanup bio_check_ro 2023-02-06 07:49:41 +01:00
blk-exec.c
blk-flush.c block: Fix fsync always failed if once failed 2022-03-08 19:04:08 +01:00
blk-integrity.c
blk-ioc.c block: Fix use-after-free issue accessing struct io_cq 2020-04-17 10:48:41 +02:00
blk-iolatency.c blk-iolatency: Fix inflight count imbalances and IO hangs on offline 2022-06-14 16:59:30 +02:00
blk-lib.c block: fix 32 bit overflow in __blkdev_issue_discard() 2020-02-01 09:37:12 +00:00
blk-map.c block: fix memleak when __blk_rq_map_user_iov() is failed 2020-01-12 12:17:22 +01:00
blk-merge.c block: don't merge across cgroup boundaries if blkcg is enabled 2022-04-15 14:14:41 +02:00
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n 2018-07-09 09:07:52 -06:00
blk-mq-debugfs.c block, scsi: Change the preempt-only flag into a counter 2019-08-04 09:30:57 +02:00
blk-mq-debugfs.h block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n 2018-07-09 09:07:52 -06:00
blk-mq-pci.c blk-mq: code clean-up by adding an API to clear set->mq_map 2018-07-09 09:07:53 -06:00
blk-mq-rdma.c
blk-mq-sched.c blk-mq: remove stale comment for blk_mq_sched_mark_restart_hctx 2023-03-11 16:31:33 +01:00
blk-mq-sched.h block: mq-deadline: Fix write completion handling 2019-01-13 09:51:07 +01:00
blk-mq-sysfs.c blk-mq: fix possible memleak when register 'hctx' failed 2023-01-18 11:30:37 +01:00
blk-mq-tag.c blk-mq: Allow blocking queue tag iter callbacks 2018-09-25 20:17:59 -06:00
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c blk-mq: fix IO hang from sbitmap wakeup race 2024-02-23 08:12:51 +01:00
blk-mq.h blk-mq: free hw queue's resource in hctx's release handler 2019-09-16 08:22:13 +02:00
blk-rq-qos.c blk-wbt: fix performance regression in wbt scale_up/scale_down 2019-10-17 13:45:16 -07:00
blk-rq-qos.h blk-rq-qos: fix first node deletion of rq_qos_del() 2019-10-29 09:20:09 +01:00
blk-settings.c blk-settings: align max_sectors on "logical_block_size" boundary 2021-03-04 09:39:51 +01:00
blk-softirq.c block: fix timeout changes for legacy request drivers 2018-06-19 11:27:18 -06:00
blk-stat.c block: prevent division by zero in blk_rq_stat_sum() 2024-04-13 12:50:16 +02:00
blk-stat.h block: deactivate blk_stat timer in wbt_disable_default() 2019-01-13 09:51:06 +01:00
blk-sysfs.c block: don't delete queue kobject before its children 2022-04-15 14:14:43 +02:00
blk-tag.c for-linus-20180616 2018-06-17 05:37:55 +09:00
blk-throttle.c blk-throttle: fix lockdep warning of "cgroup_mutex or RCU read lock required!" 2023-12-20 15:38:02 +01:00
blk-timeout.c blk-mq: Fix timeout handling in case the timeout handler returns BLK_EH_DONE 2018-06-23 10:25:45 -06:00
blk-wbt.c blk-wbt: make sure throttle is enabled properly 2021-07-20 16:15:48 +02:00
blk-wbt.h blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled() 2021-07-20 16:15:48 +02:00
blk-zoned.c blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN 2021-09-22 11:47:57 +02:00
blk.h block: split .sysfs_lock into two locks 2021-03-04 09:39:30 +01:00
bounce.c block: copy ioprio in __bio_clone_fast() and bounce 2018-12-01 09:37:32 +01:00
bsg-lib.c block/bsg-lib: use PTR_ERR_OR_ZERO to simplify the flow path 2018-08-01 09:13:03 -06:00
bsg.c block: bsg: move atomic_t ref_count variable to refcount API 2018-08-27 19:17:02 -06:00
cfq-iosched.c cfq: Suppress compiler warnings about comparisons 2018-08-07 17:57:13 -06:00
cmdline-parser.c
compat_ioctl.c block/compat_ioctl: fix range check in BLKGETSIZE 2022-04-27 13:39:45 +02:00
deadline-iosched.c
elevator.c block/wbt: fix negative inflight counter when remove scsi device 2022-02-23 11:58:40 +01:00
genhd.c md: switch to ->check_events for media change notifications 2024-03-26 18:22:34 -04:00
ioctl.c block: add a new set_read_only method 2024-03-26 18:22:34 -04:00
ioprio.c block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2) 2021-12-14 10:18:07 +01:00
kyber-iosched.c
mq-deadline.c block: mq-deadline: Fix queue restart handling 2019-10-07 18:57:19 +02:00
noop-iosched.c
opal_proto.h block: sed-opal: handle empty atoms when parsing response 2024-03-26 18:22:33 -04:00
partition-generic.c block: unhash blkdev part inode when the part is deleted 2023-01-18 11:29:59 +01:00
scsi_ioctl.c
sed-opal.c block: sed-opal: handle empty atoms when parsing response 2024-03-26 18:22:33 -04:00
t10-pi.c block: move dif_prepare/dif_complete functions to block layer 2018-07-30 08:27:02 -06:00