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Fix zdb_read_block using zio after it is destroyed

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The checksum display code of zdb_read_block uses a zio
to read in the block and then calls zio_checksum_compute.
Use a new zio in the call to zio_checksum_compute not the zio
from the read which has been destroyed by zio_wait.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Signed-off-by: Paul Zuchowski <pzuchowski@datto.com>
Closes #9644
Closes #9657
This commit is contained in:
Paul Zuchowski 2019-12-03 17:37:15 -05:00 committed by Tony Hutter
parent 388ef045b2
commit 73b5231187
1 changed files with 6 additions and 1 deletions
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7
cmd/zdb/zdb.c
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@ -5859,13 +5859,18 @@ zdb_read_block(char *thing, spa_t *spa)
}
error = zio_wait(czio);
if (error == 0 || error == ECKSUM) {
zio_checksum_compute(czio, ck, pabd, lsize);
zio_t *ck_zio = zio_root(spa, NULL, NULL, 0);
ck_zio->io_offset =
DVA_GET_OFFSET(&bp->blk_dva[0]);
ck_zio->io_bp = bp;
zio_checksum_compute(ck_zio, ck, pabd, lsize);
printf("%12s\tcksum=%llx:%llx:%llx:%llx\n",
zio_checksum_table[ck].ci_name,
(u_longlong_t)bp->blk_cksum.zc_word[0],
(u_longlong_t)bp->blk_cksum.zc_word[1],
(u_longlong_t)bp->blk_cksum.zc_word[2],
(u_longlong_t)bp->blk_cksum.zc_word[3]);
zio_wait(ck_zio);
} else {
printf("error %d reading block\n", error);
}