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zil: Don't expect zio_shrink() to succeed. 

At least for RAIDZ zio_shrink() does not reduce zio size, but reduced
wsz in that case likely results in writing uninitialized memory.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by:  Alexander Motin <mav@FreeBSD.org>
Sponsored by:   iXsystems, Inc.
Closes #14853
This commit is contained in:
Alexander Motin 2023-05-11 17:27:12 -04:00 committed by Brian Behlendorf
parent a727848e05
commit b01a8cc2c0
1 changed files with 1 additions and 0 deletions
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module/zfs/zil.c
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@ -1593,6 +1593,7 @@ zil_lwb_write_issue(zilog_t *zilog, lwb_t *lwb)
wsz = P2ROUNDUP_TYPED(lwb->lwb_nused, ZIL_MIN_BLKSZ, uint64_t); wsz = P2ROUNDUP_TYPED(lwb->lwb_nused, ZIL_MIN_BLKSZ, uint64_t);
ASSERT3U(wsz, <=, lwb->lwb_sz); ASSERT3U(wsz, <=, lwb->lwb_sz);
zio_shrink(lwb->lwb_write_zio, wsz); zio_shrink(lwb->lwb_write_zio, wsz);
wsz = lwb->lwb_write_zio->io_size;
} else { } else {
wsz = lwb->lwb_sz; wsz = lwb->lwb_sz;