Roman Smirnov 53510903f2 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>
(cherry picked from commit 6a55dab4ac956deb23690eedd74e70b892a378e7)
[Vegard: fix conflicts due to missing commit
 eca8b53a6769e60d6d8240d71202d73b0af81901 ("blk-stat: delete useless
 code").]
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>

2024-05-30 09:00:44 +00:00

..

partitions

block: fix signed int overflow in Amiga partition support

2024-05-06 14:36:27 +00:00

badblocks.c

…

bfq-cgroup.c

block, bfq: fix overwrite of bfq_group pointer in bfq_find_set_group()

2020-04-02 16:34:15 +02:00

bfq-iosched.c

block, bfq: protect 'bfqd->queued' by 'bfqd->lock'

2022-11-10 15:47:22 +01:00

bfq-iosched.h

…

bfq-wf2q.c

block, bfq: correctly charge and reset entity service in all cases

2018-11-13 11:14:55 -08:00

bio-integrity.c

block: bio-integrity: Copy flags when bio_integrity_payload is cloned

2023-03-11 16:26:35 +01:00

bio.c

block: Remove special-casing of compound pages

2024-03-08 08:21:27 +00:00

blk-cgroup.c

blk-cgroup: Pre-allocate tree node on blkg_conf_prep

2020-11-10 10:29:05 +01:00

blk-core.c

block: ensure bdi->io_pages is always initialized

2020-09-12 13:39:11 +02:00

blk-exec.c

…

blk-flush.c

blk-mq: fix a hung issue when fsync

2019-02-20 10:20:44 +01:00

blk-integrity.c

…

blk-ioc.c

block: Fix use-after-free issue accessing struct io_cq

2020-04-24 08:00:28 +02:00

blk-lib.c

block: fix infinite loop if the device loses discard capability

2018-12-29 13:39:07 +01:00

blk-map.c

block: fix memleak when __blk_rq_map_user_iov() is failed

2020-01-12 12:12:00 +01:00

blk-merge.c

block: don't use bio->bi_vcnt to figure out segment number

2020-01-27 14:46:19 +01:00

blk-mq-cpumap.c

…

blk-mq-debugfs.c

…

blk-mq-debugfs.h

…

blk-mq-pci.c

…

blk-mq-rdma.c

…

blk-mq-sched.c

blk-mq: only attempt to merge bio if there is rq in sw queue

2018-09-26 08:38:13 +02:00

blk-mq-sched.h

…

blk-mq-sysfs.c

blk-mq: fix possible memleak when register 'hctx' failed

2023-01-18 09:26:32 +01:00

blk-mq-tag.c

blk-mq: Allow blocking queue tag iter callbacks

2020-04-13 10:34:23 +02:00

blk-mq-tag.h

…

blk-mq-virtio.c

…

blk-mq.c

blk-mq: Swap two calls in blk_mq_exit_queue()

2021-05-22 10:57:40 +02:00

blk-mq.h

…

blk-settings.c

blk-settings: align max_sectors on "logical_block_size" boundary

2021-03-03 18:22:50 +01:00

blk-softirq.c

…

blk-stat.c

block: prevent division by zero in blk_rq_stat_sum()

2024-05-30 09:00:44 +00:00

blk-stat.h

…

blk-sysfs.c

blk-mq: move cancel of requeue_work to the front of blk_exit_queue

2019-10-05 12:47:37 +02:00

blk-tag.c

…

blk-throttle.c

blk-throttle: fix lockdep warning of "cgroup_mutex or RCU read lock required!"

2023-12-20 15:32:35 +01:00

blk-timeout.c

…

blk-wbt.c

…

blk-wbt.h

…

blk-zoned.c

blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN

2021-09-22 11:45:24 +02:00

blk.h

…

bounce.c

…

bsg-lib.c

…

bsg.c

…

cfq-iosched.c

cfq: Suppress compiler warnings about comparisons

2018-09-15 09:45:31 +02:00

cmdline-parser.c

…

compat_ioctl.c

block/compat_ioctl: fix range check in BLKGETSIZE

2022-04-27 13:15:31 +02:00

deadline-iosched.c

…

elevator.c

elevator: lookup mq vs non-mq elevators

2018-12-21 14:13:10 +01:00

genhd.c

md: switch to ->check_events for media change notifications

2024-04-16 10:30:27 +00:00

ioctl.c

block: add a new set_read_only method

2024-04-16 10:30:27 +00:00

ioprio.c

block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2)

2021-12-14 10:16:55 +01:00

Kconfig

…

Kconfig.iosched

…

kyber-iosched.c

…

Makefile

…

mq-deadline.c

…

noop-iosched.c

…

opal_proto.h

block: sed-opal: handle empty atoms when parsing response

2024-04-16 09:38:57 +00:00

partition-generic.c

block: unhash blkdev part inode when the part is deleted

2023-01-18 09:26:05 +01:00

scsi_ioctl.c

…

sed-opal.c

block: sed-opal: handle empty atoms when parsing response

2024-04-16 09:38:57 +00:00

t10-pi.c

…