Subject: Coverity: blkdev_zone_mgmt(): Memory - illegal accesses

From: coverity-bot <[email-masked]>
Date: Mon, 11 Nov 2019 17:35:00 -0800

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:

a2d6b3a2d390 ("block: Improve zone reset execution")

Coverity reported the following:

*** CID 1487849:  Memory - illegal accesses  (USE_AFTER_FREE)
/block/blk-zoned.c: 293 in blkdev_zone_mgmt()
287
288     		/* This may take a while, so be nice to others */
289     		cond_resched();
290     	}
291
292     	ret = submit_bio_wait(bio);
vvv     CID 1487849:  Memory - illegal accesses  (USE_AFTER_FREE)
vvv     Calling "bio_put" dereferences freed pointer "bio".
293     	bio_put(bio);
294
295     	return ret;
296     }
297     EXPORT_SYMBOL_GPL(blkdev_zone_mgmt);
298

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 <[email-masked]>
Addresses-Coverity-ID: 1487849 ("Memory - illegal accesses")
Fixes: a2d6b3a2d390 ("block: Improve zone reset execution")

Thanks for your attention!

-- 
Coverity-bot