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Fix -Wuse-after-free warning in dbuf_issue_final_prefetch_done() 

Move the use of the private pointer after it is freed.  It's only
used as a tag so a dereference would never occur, but there's no
harm in inverting the order to resolve the warning.

    module/zfs/dbuf.c: In function 'dbuf_issue_final_prefetch_done':
    module/zfs/dbuf.c:3204:17: error:
    pointer 'private' may be used after 'free' [-Werror=use-after-free]

Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #13528
Closes #13575
This commit is contained in:
Brian Behlendorf 2022-06-20 21:32:03 +00:00
parent 087f5dedd5
commit 6a81173026
1 changed files with 2 additions and 1 deletions
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3
module/zfs/dbuf.c
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@ -3136,9 +3136,10 @@ dbuf_issue_final_prefetch_done(zio_t *zio, const zbookmark_phys_t *zb,
(void) zio, (void) zb, (void) iobp;
dbuf_prefetch_arg_t *dpa = private;
dbuf_prefetch_fini(dpa, B_TRUE);
if (abuf != NULL)
arc_buf_destroy(abuf, private);
dbuf_prefetch_fini(dpa, B_TRUE);
}
/*