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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2005-10-18 14:20:21 -0700 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2005-10-18 14:20:21 -0700 |
| commit | 4c780a4688b421baa896b59778c05d7e068e479f (patch) | |
| tree | 5d7727971fc92e037857d6c560a6af8f4196df8b /fs | |
| parent | 550f57470c6506f5ef3c708335dea6bd48bf3dc4 (diff) | |
| download | linux-3.10-4c780a4688b421baa896b59778c05d7e068e479f.tar.gz linux-3.10-4c780a4688b421baa896b59778c05d7e068e479f.tar.bz2 linux-3.10-4c780a4688b421baa896b59778c05d7e068e479f.zip | |
Fix Connectathon locking test failure
We currently fail Connectathon test 6.10 in the case of 32-bit locks due
to incorrect error checking.
Also add support for l->l_len < 0 to 64-bit locks.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/locks.c | 42 |
1 files changed, 25 insertions, 17 deletions
diff --git a/fs/locks.c b/fs/locks.c index 7eb1d77b920..a1e8b224801 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -316,21 +316,22 @@ static int flock_to_posix_lock(struct file *filp, struct file_lock *fl, /* POSIX-1996 leaves the case l->l_len < 0 undefined; POSIX-2001 defines it. */ start += l->l_start; - end = start + l->l_len - 1; - if (l->l_len < 0) { + if (start < 0) + return -EINVAL; + fl->fl_end = OFFSET_MAX; + if (l->l_len > 0) { + end = start + l->l_len - 1; + fl->fl_end = end; + } else if (l->l_len < 0) { end = start - 1; + fl->fl_end = end; start += l->l_len; + if (start < 0) + return -EINVAL; } - - if (start < 0) - return -EINVAL; - if (l->l_len > 0 && end < 0) - return -EOVERFLOW; - fl->fl_start = start; /* we record the absolute position */ - fl->fl_end = end; - if (l->l_len == 0) - fl->fl_end = OFFSET_MAX; + if (fl->fl_end < fl->fl_start) + return -EOVERFLOW; fl->fl_owner = current->files; fl->fl_pid = current->tgid; @@ -362,14 +363,21 @@ static int flock64_to_posix_lock(struct file *filp, struct file_lock *fl, return -EINVAL; } - if (((start += l->l_start) < 0) || (l->l_len < 0)) + start += l->l_start; + if (start < 0) return -EINVAL; - fl->fl_end = start + l->l_len - 1; - if (l->l_len > 0 && fl->fl_end < 0) - return -EOVERFLOW; + fl->fl_end = OFFSET_MAX; + if (l->l_len > 0) { + fl->fl_end = start + l->l_len - 1; + } else if (l->l_len < 0) { + fl->fl_end = start - 1; + start += l->l_len; + if (start < 0) + return -EINVAL; + } fl->fl_start = start; /* we record the absolute position */ - if (l->l_len == 0) - fl->fl_end = OFFSET_MAX; + if (fl->fl_end < fl->fl_start) + return -EOVERFLOW; fl->fl_owner = current->files; fl->fl_pid = current->tgid; |