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Fix use-afer-free regression in RAIDZ expansion

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We should not dereference rra after the last zio_nowait() is called.
It seems very unlikely, but ASAN in ztest managed to catch it.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
Closes #16868
This commit is contained in:
Alexander Motin 2024-12-14 17:02:11 -05:00 committed by Brian Behlendorf
parent 2284a61129
commit 696943533c
1 changed files with 2 additions and 2 deletions
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4
module/zfs/vdev_raidz.c
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@ -3914,8 +3914,8 @@ raidz_reflow_read_done(zio_t *zio)
if (atomic_dec_32_nv(&rra->rra_tbd) > 0)
return;
rra->rra_tbd = rra->rra_writes;
for (uint64_t i = 0; i < rra->rra_writes; i++)
uint32_t writes = rra->rra_tbd = rra->rra_writes;
for (uint64_t i = 0; i < writes; i++)
zio_nowait(rra->rra_zio[i]);
}