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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2019-07-02 09:39:39 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-07-02 09:40:05 -0700 |
| commit | f16fe3ecde6237256eeacb3cd582217ffe62c647 (patch) | |
| tree | 7920fe3702057c4060e02c997ff2a0c96c472e33 /fs/xfs | |
| parent | ebd126a651f83ceb5157072dafb74a2a27a23b0f (diff) | |
| download | linux-f16fe3ecde6237256eeacb3cd582217ffe62c647.tar.gz linux-f16fe3ecde6237256eeacb3cd582217ffe62c647.tar.bz2 linux-f16fe3ecde6237256eeacb3cd582217ffe62c647.zip | |
xfs: bulkstat should copy lastip whenever userspace supplies one
When userspace passes in a @lastip pointer we should copy the results
back, even if the @ocount pointer is NULL.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_ioctl.c | 13 | ||||
| -rw-r--r-- | fs/xfs/xfs_ioctl32.c | 13 |
2 files changed, 12 insertions, 14 deletions
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 7f1732ad6c40..8bc74ae3b72a 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -759,14 +759,13 @@ xfs_ioc_bulkstat( if (error) return error; - if (bulkreq.ocount != NULL) { - if (copy_to_user(bulkreq.lastip, &inlast, - sizeof(xfs_ino_t))) - return -EFAULT; + if (bulkreq.lastip != NULL && + copy_to_user(bulkreq.lastip, &inlast, sizeof(xfs_ino_t))) + return -EFAULT; - if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) - return -EFAULT; - } + if (bulkreq.ocount != NULL && + copy_to_user(bulkreq.ocount, &count, sizeof(count))) + return -EFAULT; return 0; } diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c index d1967fe67472..3c3fb16685b1 100644 --- a/fs/xfs/xfs_ioctl32.c +++ b/fs/xfs/xfs_ioctl32.c @@ -305,14 +305,13 @@ xfs_compat_ioc_bulkstat( if (error) return error; - if (bulkreq.ocount != NULL) { - if (copy_to_user(bulkreq.lastip, &inlast, - sizeof(xfs_ino_t))) - return -EFAULT; + if (bulkreq.lastip != NULL && + copy_to_user(bulkreq.lastip, &inlast, sizeof(xfs_ino_t))) + return -EFAULT; - if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) - return -EFAULT; - } + if (bulkreq.ocount != NULL && + copy_to_user(bulkreq.ocount, &count, sizeof(count))) + return -EFAULT; return 0; } |