* Coverity: bch_cached_dev_run(): Memory - illegal accesses
@ 2019-11-12 1:35 coverity-bot
0 siblings, 0 replies; only message in thread
From: coverity-bot @ 2019-11-12 1:35 UTC (permalink / raw
To: Kent Overstreet; +Cc: Gustavo A. R. Silva, linux-next
Hello!
This is an experimental automated report about issues detected by Coverity
from a scan of next-20191108 as part of the linux-next weekly scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan
You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by recent commits:
ee66850642ef ("bcache: Use bd_link_disk_holder()")
Coverity reported the following:
*** CID 1487848: Memory - illegal accesses (USE_AFTER_FREE)
/drivers/md/bcache/super.c: 961 in bch_cached_dev_run()
955 SET_BDEV_STATE(&dc->sb, BDEV_STATE_STALE);
956 bch_write_bdev_super(dc, &cl);
957 closure_sync(&cl);
958 }
959
960 add_disk(d->disk);
vvv CID 1487848: Memory - illegal accesses (USE_AFTER_FREE)
vvv Dereferencing freed pointer "dc".
961 bd_link_disk_holder(dc->bdev, dc->disk.disk);
962 /*
963 * won't show up in the uevent file, use udevadm monitor -e instead
964 * only class / kset properties are persistent
965 */
966 kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env);
If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):
Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1487848 ("Memory - illegal accesses")
Fixes: ee66850642ef ("bcache: Use bd_link_disk_holder()")
Thanks for your attention!
--
Coverity-bot
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