| commit | fc3959e4669a1c2149b91ccb05101cfc7ae1fc05 | |
| author | Fam Zheng <famz@redhat.com> | |
| Tue, 24 Mar 2015 01:23:49 +0000 (24 09:23 +0800) | ||
| committer | Stefan Hajnoczi <stefanha@redhat.com> | |
| Fri, 27 Mar 2015 10:01:12 +0000 (27 10:01 +0000) | ||
| tree | b3e2be4c49d43cd621a579de7865c3687b7b59e9 | treesnapshot (tar.gz zip) |
| parent | 2115f2a1d8c77c2a735add1ed02ae0c1feae0d9a | commitdiff |
block: Fix unaligned zero write
If the zero write is not aligned, bdrv_co_do_pwritev will segfault
because of accessing to the NULL qiov passed in by bdrv_co_write_zeroes.
Fix this by allocating a local qiov in bdrv_co_do_pwritev if the request
is not aligned. (In this case the padding iovs are necessary anyway, so
it doesn't hurt.)
Also add a check at the end of bdrv_co_do_pwritev to clear the zero flag
if padding is involved.
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1427160230-4489-2-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
If the zero write is not aligned, bdrv_co_do_pwritev will segfault
because of accessing to the NULL qiov passed in by bdrv_co_write_zeroes.
Fix this by allocating a local qiov in bdrv_co_do_pwritev if the request
is not aligned. (In this case the padding iovs are necessary anyway, so
it doesn't hurt.)
Also add a check at the end of bdrv_co_do_pwritev to clear the zero flag
if padding is involved.
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1427160230-4489-2-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
| block.c | diffblobblamehistory |