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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>
hifive-unleashed-5.1
Trond Myklebust 2005-10-18 14:20:21 -07:00
parent 550f57470c
commit 4c780a4688
1 changed files with 26 additions and 18 deletions
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44
fs/locks.c
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@ -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) {
end = start - 1;
start += l->l_len;
}
if (start < 0)
return -EINVAL;
if (l->l_len > 0 && end < 0)
return -EOVERFLOW;
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;
}
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;