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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2020-04-12 23:11:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-02 09:48:56 +0300 |
| commit | 535ed3f01564a09f73389f1d0afc2e78a0a8c878 (patch) | |
| tree | a43f04f872d5a8fde84223fa721fda2fa905e646 | |
| parent | ec6e5792d62d4c3131bfc998d2aee760a6724705 (diff) | |
| download | linux-535ed3f01564a09f73389f1d0afc2e78a0a8c878.tar.xz | |
xfs: fix partially uninitialized structure in xfs_reflink_remap_extent
[ Upstream commit c142932c29e533ee892f87b44d8abc5719edceec ]
In the reflink extent remap function, it turns out that uirec (the block
mapping corresponding only to the part of the passed-in mapping that got
unmapped) was not fully initialized. Specifically, br_state was not
being copied from the passed-in struct to the uirec. This could lead to
unpredictable results such as the reflinked mapping being marked
unwritten in the destination file.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | fs/xfs/xfs_reflink.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 0f08153b4994..6a4fd1738b08 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -1053,6 +1053,7 @@ xfs_reflink_remap_extent( uirec.br_startblock = irec->br_startblock + rlen; uirec.br_startoff = irec->br_startoff + rlen; uirec.br_blockcount = unmap_len - rlen; + uirec.br_state = irec->br_state; unmap_len = rlen; /* If this isn't a real mapping, we're done. */ |