| Message ID | 20210324140939.7480-1-yuehaibing@huawei.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | Jason Gunthorpe |
| Headers | show |
| Series | [-next] IB/srpt: Fix passing zero to 'PTR_ERR' | expand |
On Wed, Mar 24, 2021 at 10:09:39PM +0800, YueHaibing wrote: > Fix smatch warning: > > drivers/infiniband/ulp/srpt/ib_srpt.c:2341 srpt_cm_req_recv() warn: passing zero to 'PTR_ERR' > > Use PTR_ERR_OR_ZERO instead of PTR_ERR > > Fixes: 847462de3a0a ("IB/srpt: Fix srpt_cm_req_recv() error path (1/2)") > Signed-off-by: YueHaibing <yuehaibing@huawei.com> > --- > drivers/infiniband/ulp/srpt/ib_srpt.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c > index 6be60aa5ffe2..3ff24b5048ac 100644 > --- a/drivers/infiniband/ulp/srpt/ib_srpt.c > +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c > @@ -2338,7 +2338,7 @@ static int srpt_cm_req_recv(struct srpt_device *const sdev, > > if (IS_ERR_OR_NULL(ch->sess)) { > WARN_ON_ONCE(ch->sess == NULL); > - ret = PTR_ERR(ch->sess); > + ret = PTR_ERR_OR_ZERO(ch->sess); It is crazy, in first line, we checked ch->sess and allowed it to be NULL, later caused to kernel panic and set ret to success. > ch->sess = NULL; > pr_info("Rejected login for initiator %s: ret = %d.\n", > ch->sess_name, ret); > -- > 2.22.0 >
On Wed, Mar 24, 2021 at 10:09:39PM +0800, YueHaibing wrote: > Fix smatch warning: > > drivers/infiniband/ulp/srpt/ib_srpt.c:2341 srpt_cm_req_recv() warn: passing zero to 'PTR_ERR' > > Use PTR_ERR_OR_ZERO instead of PTR_ERR > > Fixes: 847462de3a0a ("IB/srpt: Fix srpt_cm_req_recv() error path (1/2)") > Signed-off-by: YueHaibing <yuehaibing@huawei.com> > drivers/infiniband/ulp/srpt/ib_srpt.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c > index 6be60aa5ffe2..3ff24b5048ac 100644 > +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c > @@ -2338,7 +2338,7 @@ static int srpt_cm_req_recv(struct srpt_device *const sdev, > > if (IS_ERR_OR_NULL(ch->sess)) { > WARN_ON_ONCE(ch->sess == NULL); > - ret = PTR_ERR(ch->sess); > + ret = PTR_ERR_OR_ZERO(ch->sess); This whole flow is a mess, if someone fixes properly then fine, but I'm not convinced returning 0 here is correct either. Jason
On 3/24/21 7:09 AM, YueHaibing wrote: > Fix smatch warning: > > drivers/infiniband/ulp/srpt/ib_srpt.c:2341 srpt_cm_req_recv() warn: passing zero to 'PTR_ERR' > > Use PTR_ERR_OR_ZERO instead of PTR_ERR > > Fixes: 847462de3a0a ("IB/srpt: Fix srpt_cm_req_recv() error path (1/2)") > Signed-off-by: YueHaibing <yuehaibing@huawei.com> > --- > drivers/infiniband/ulp/srpt/ib_srpt.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c > index 6be60aa5ffe2..3ff24b5048ac 100644 > --- a/drivers/infiniband/ulp/srpt/ib_srpt.c > +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c > @@ -2338,7 +2338,7 @@ static int srpt_cm_req_recv(struct srpt_device *const sdev, > > if (IS_ERR_OR_NULL(ch->sess)) { > WARN_ON_ONCE(ch->sess == NULL); > - ret = PTR_ERR(ch->sess); > + ret = PTR_ERR_OR_ZERO(ch->sess); > ch->sess = NULL; > pr_info("Rejected login for initiator %s: ret = %d.\n", > ch->sess_name, ret); (just noticed this patch) target_setup_session() should either return a valid session pointer or an ERR_PTR() but not NULL. Changing IS_ERR_OR_NULL() into IS_ERR() and removing the WARN_ON_ONCE(ch->sess == NULL) may be a better solution. Thanks, Bart.
diff --git a/drivers/infiniband/ulp/srpt/ib_srpt.c b/drivers/infiniband/ulp/srpt/ib_srpt.c index 6be60aa5ffe2..3ff24b5048ac 100644 --- a/drivers/infiniband/ulp/srpt/ib_srpt.c +++ b/drivers/infiniband/ulp/srpt/ib_srpt.c @@ -2338,7 +2338,7 @@ static int srpt_cm_req_recv(struct srpt_device *const sdev, if (IS_ERR_OR_NULL(ch->sess)) { WARN_ON_ONCE(ch->sess == NULL); - ret = PTR_ERR(ch->sess); + ret = PTR_ERR_OR_ZERO(ch->sess); ch->sess = NULL; pr_info("Rejected login for initiator %s: ret = %d.\n", ch->sess_name, ret);
Fix smatch warning: drivers/infiniband/ulp/srpt/ib_srpt.c:2341 srpt_cm_req_recv() warn: passing zero to 'PTR_ERR' Use PTR_ERR_OR_ZERO instead of PTR_ERR Fixes: 847462de3a0a ("IB/srpt: Fix srpt_cm_req_recv() error path (1/2)") Signed-off-by: YueHaibing <yuehaibing@huawei.com> --- drivers/infiniband/ulp/srpt/ib_srpt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)