* bug report: ceph: && vs ||
@ 2010-03-20 12:39 Dan Carpenter
2010-03-21 3:59 ` [ceph-devel] " Sage Weil
0 siblings, 1 reply; 3+ messages in thread
From: Dan Carpenter @ 2010-03-20 12:39 UTC (permalink / raw)
To: Sage Weil; +Cc: ceph-devel, linux-kernel
1772 /* correct session? */
1773 if (!req->r_session && req->r_session != session) {
Is this supposed to || here? We know "session" is non-NULL at
the point because we already dereferenced it. If "req->r_session"
is null then the second condition is always true.
Also we dereference "req->r_session" later on without checking.
1774 pr_err("mdsc_handle_reply got %llu on session mds%d"
1775 " not mds%d\n", tid, session->s_mds,
1776 req->r_session ? req->r_session->s_mds : -1);
1777 mutex_unlock(&mdsc->mutex);
1778 goto out;
1779 }
1780
regards,
dan carpenter
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: bug report: ceph: && vs ||
2010-03-20 12:39 bug report: ceph: && vs || Dan Carpenter
@ 2010-03-21 3:59 ` Sage Weil
0 siblings, 0 replies; 3+ messages in thread
From: Sage Weil @ 2010-03-21 3:59 UTC (permalink / raw)
To: Dan Carpenter; +Cc: ceph-devel, linux-kernel
On Sat, 20 Mar 2010, Dan Carpenter wrote:
>
>
> 1772 /* correct session? */
> 1773 if (!req->r_session && req->r_session != session) {
>
> Is this supposed to || here? We know "session" is non-NULL at
> the point because we already dereferenced it. If "req->r_session"
> is null then the second condition is always true.
>
> Also we dereference "req->r_session" later on without checking.
Yeah, that check is clearly wrong. A
if (req->r_session != session) {
is sufficient because the passed session is always non-NULL. Applied a
fix.
Thanks-
sage
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ceph-devel] bug report: ceph: && vs ||
@ 2010-03-21 3:59 ` Sage Weil
0 siblings, 0 replies; 3+ messages in thread
From: Sage Weil @ 2010-03-21 3:59 UTC (permalink / raw)
To: Dan Carpenter; +Cc: ceph-devel, linux-kernel
On Sat, 20 Mar 2010, Dan Carpenter wrote:
>
>
> 1772 /* correct session? */
> 1773 if (!req->r_session && req->r_session != session) {
>
> Is this supposed to || here? We know "session" is non-NULL at
> the point because we already dereferenced it. If "req->r_session"
> is null then the second condition is always true.
>
> Also we dereference "req->r_session" later on without checking.
Yeah, that check is clearly wrong. A
if (req->r_session != session) {
is sufficient because the passed session is always non-NULL. Applied a
fix.
Thanks-
sage
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-03-20 12:39 bug report: ceph: && vs || Dan Carpenter
2010-03-21 3:59 ` Sage Weil
2010-03-21 3:59 ` [ceph-devel] " Sage Weil
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