WSL2-Linux-Kernel/drivers/md
Arnd Bergmann 53b8d89ddb md: raid5: avoid string overflow warning
gcc warns about a possible overflow of the kmem_cache string, when adding
four characters to a string of the same length:

drivers/md/raid5.c: In function 'setup_conf':
drivers/md/raid5.c:2207:34: error: '-alt' directive writing 4 bytes into a region of size between 1 and 32 [-Werror=format-overflow=]
  sprintf(conf->cache_name[1], "%s-alt", conf->cache_name[0]);
                                  ^~~~
drivers/md/raid5.c:2207:2: note: 'sprintf' output between 5 and 36 bytes into a destination of size 32
  sprintf(conf->cache_name[1], "%s-alt", conf->cache_name[0]);
  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If I'm counting correctly, we need 11 characters for the fixed part
of the string and 18 characters for a 64-bit pointer (when no gendisk
is used), so that leaves three characters for conf->level, which should
always be sufficient.

This makes the code use snprintf() with the correct length, to
make the code more robust against changes, and to get the compiler
to shut up.

In commit f4be6b43f1 ("md/raid5: ensure we create a unique name for
kmem_cache when mddev has no gendisk") from 2010, Neil said that
the pointer could be removed "shortly" once devices without gendisk
are disallowed. I have no idea if that happened, but if it did, that
should probably be changed as well.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Shaohua Li <sh.li@alibaba-inc.com>
2018-02-21 09:49:15 -08:00
..
bcache bcache: fix for data collapse after re-attaching an attached device 2018-02-07 12:50:01 -07:00
persistent-data dm btree: fix serious bug in btree_split_beneath() 2018-01-17 09:07:55 -05:00
Kconfig dm: add unstriped target 2018-01-17 09:16:00 -05:00
Makefile dm: add unstriped target 2018-01-17 09:16:00 -05:00
dm-bio-prison-v1.c
dm-bio-prison-v1.h
dm-bio-prison-v2.c
dm-bio-prison-v2.h
dm-bio-record.h
dm-bufio.c dm bufio: eliminate unnecessary labels in dm_bufio_client_create() 2018-01-17 09:16:04 -05:00
dm-bufio.h dm integrity: optimize writing dm-bufio buffers that are partially changed 2017-08-28 11:47:17 -04:00
dm-builtin.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dm-cache-background-tracker.c dm cache background tracker: limit amount of background work that may be issued at once 2017-11-10 15:45:03 -05:00
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c dm cache: convert dm_cache_metadata.ref_count from atomic_t to refcount_t 2017-10-24 15:09:51 -04:00
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c dm cache policy smq: allocate cache blocks in order 2017-11-10 15:45:05 -05:00
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c dm: fix various targets to dm_register_target after module __init resources created 2017-12-04 10:23:10 -05:00
dm-core.h dm: various cleanups to md->queue initialization code 2018-01-29 13:44:55 -05:00
dm-crypt.c - DM core fixes to ensure that bio submission follows a depth-first tree 2018-01-31 11:05:47 -08:00
dm-delay.c dm: backfill missing calls to mutex_destroy() 2018-01-17 09:16:15 -05:00
dm-era-target.c dm: do not set 'discards_supported' in targets that do not need it 2017-11-16 16:33:54 -05:00
dm-exception-store.c
dm-exception-store.h
dm-flakey.c dm flakey: check for null arg_name in parse_features() 2018-01-17 09:16:13 -05:00
dm-integrity.c dm integrity: don't store cipher request on the stack 2018-01-17 09:08:57 -05:00
dm-io.c dm io: remove BIOSET_NEED_RESCUER flag from bios bioset 2017-12-13 12:15:56 -05:00
dm-ioctl.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
dm-kcopyd.c dm: backfill missing calls to mutex_destroy() 2018-01-17 09:16:15 -05:00
dm-linear.c - Some request-based DM core and DM multipath fixes and cleanups 2017-09-14 13:43:16 -07:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c dm log writes: fix max length used for kstrndup 2018-01-17 09:16:16 -05:00
dm-log.c
dm-mpath.c - DM core fixes to ensure that bio submission follows a depth-first tree 2018-01-31 11:05:47 -08:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c dm mpath selector: more evenly distribute ties 2018-01-29 13:44:58 -05:00
dm-raid.c - DM core fixes to ensure that bio submission follows a depth-first tree 2018-01-31 11:05:47 -08:00
dm-raid1.c md: Convert timers to use timer_setup() 2017-11-14 20:11:57 -07:00
dm-region-hash.c
dm-round-robin.c
dm-rq.c for-linus-20180204 2018-02-04 11:16:35 -08:00
dm-rq.h dm rq: do not update rq partially in each ending bio 2017-08-28 10:23:28 -04:00
dm-service-time.c dm mpath selector: more evenly distribute ties 2018-01-29 13:44:58 -05:00
dm-snap-persistent.c
dm-snap-transient.c
dm-snap.c dm snapshot: use mutex instead of rw_semaphore 2018-01-17 09:16:14 -05:00
dm-stats.c dm: backfill missing calls to mutex_destroy() 2018-01-17 09:16:15 -05:00
dm-stats.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dm-stripe.c - Some request-based DM core and DM multipath fixes and cleanups 2017-09-14 13:43:16 -07:00
dm-switch.c locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE() 2017-10-25 11:01:08 +02:00
dm-sysfs.c
dm-table.c dm table: fix NVMe bio-based dm_table_determine_type() validation 2018-01-29 13:44:56 -05:00
dm-target.c
dm-thin-metadata.c dm thin metadata: THIN_MAX_CONCURRENT_LOCKS should be 6 2018-01-17 09:07:54 -05:00
dm-thin-metadata.h
dm-thin.c dm thin: fix trailing semicolon in __remap_and_issue_shared_cell 2018-01-29 13:44:57 -05:00
dm-uevent.c
dm-uevent.h
dm-unstripe.c dm unstripe: fix target length versus number of stripes size check 2018-01-29 13:44:58 -05:00
dm-verity-fec.c
dm-verity-fec.h
dm-verity-target.c Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-11-14 10:52:09 -08:00
dm-verity.h dm: move dm-verity to generic async completion 2017-11-03 22:11:20 +08:00
dm-zero.c
dm-zoned-metadata.c dm: backfill missing calls to mutex_destroy() 2018-01-17 09:16:15 -05:00
dm-zoned-reclaim.c
dm-zoned-target.c dm: backfill missing calls to mutex_destroy() 2018-01-17 09:16:15 -05:00
dm-zoned.h
dm.c dm: correctly handle chained bios in dec_pending() 2018-02-16 10:46:35 -05:00
dm.h dm: move dm_table_destroy() to same header as dm_table_create() 2018-01-17 09:16:06 -05:00
md-bitmap.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-11-14 16:07:26 -08:00
md-bitmap.h Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-11-14 16:07:26 -08:00
md-cluster.c md-cluster: update document for raid10 2017-11-01 21:32:25 -07:00
md-cluster.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
md-faulty.c md: rename some drivers/md/ files to have an "md-" prefix 2017-10-16 19:06:36 -07:00
md-linear.c md: rename some drivers/md/ files to have an "md-" prefix 2017-10-16 19:06:36 -07:00
md-linear.h Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-11-14 16:07:26 -08:00
md-multipath.c md-multipath: Use seq_putc() in multipath_status() 2018-02-17 13:00:35 -08:00
md-multipath.h Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-11-14 16:07:26 -08:00
md.c md: only allow remove_and_add_spares when no sync_thread running. 2018-02-19 09:40:01 -08:00
md.h md: fix md_write_start() deadlock w/o metadata devices 2018-02-18 10:11:59 -08:00
raid0.c md: remove special meaning of ->quiesce(.., 2) 2017-11-01 21:32:20 -07:00
raid0.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
raid1-10.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
raid1.c md/raid1: Fix trailing semicolon 2018-02-17 12:58:29 -08:00
raid1.h md: document lifetime of internal rdev pointer. 2018-02-18 10:22:27 -08:00
raid5-cache.c raid5-ppl: PPL support for disks with write-back cache enabled 2018-01-15 14:29:42 -08:00
raid5-log.h raid5-ppl: fix handling flush requests 2018-02-21 09:40:40 -08:00
raid5-ppl.c raid5-ppl: fix handling flush requests 2018-02-21 09:40:40 -08:00
raid5.c md: raid5: avoid string overflow warning 2018-02-21 09:49:15 -08:00
raid5.h md: document lifetime of internal rdev pointer. 2018-02-18 10:22:27 -08:00
raid10.c md raid10: fix NULL deference in handle_write_completed() 2018-02-19 09:40:36 -08:00
raid10.h md: document lifetime of internal rdev pointer. 2018-02-18 10:22:27 -08:00