* [MPTCP] [MPTCP][PATCH v2 net-next] mptcp: fix static checker warnings in mptcp_pm_add_timer
@ 2020-11-10 3:01 ` Geliang Tang
0 siblings, 0 replies; 4+ messages in thread
From: Geliang Tang @ 2020-11-10 3:01 UTC (permalink / raw)
To: mptcp
[-- Attachment #1: Type: text/plain, Size: 2023 bytes --]
Fix the following Smatch complaint:
net/mptcp/pm_netlink.c:213 mptcp_pm_add_timer()
warn: variable dereferenced before check 'msk' (see line 208)
net/mptcp/pm_netlink.c
207 struct mptcp_sock *msk = entry->sock;
208 struct sock *sk = (struct sock *)msk;
209 struct net *net = sock_net(sk);
^^
"msk" dereferenced here.
210
211 pr_debug("msk=%p", msk);
212
213 if (!msk)
^^^^
Too late.
214 return;
215
Fixes: 93f323b9cccc ("mptcp: add a new sysctl add_addr_timeout")
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
Reviewed-by: Dan Carpenter <dan.carpenter(a)oracle.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts(a)tessares.net>
Signed-off-by: Geliang Tang <geliangtang(a)gmail.com>
---
v2:
- drop "mptcp: cleanup for mptcp_pm_alloc_anno_list"
- change tag to net-next.
This patch should be applied to net-next, not -net. Since commit "mptcp:
add a new sysctl add_addr_timeout" is not applied to -net yet.
---
net/mptcp/pm_netlink.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index ed60538df7b2..446ef8f07734 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -206,7 +206,6 @@ static void mptcp_pm_add_timer(struct timer_list *timer)
struct mptcp_pm_add_entry *entry = from_timer(entry, timer, add_timer);
struct mptcp_sock *msk = entry->sock;
struct sock *sk = (struct sock *)msk;
- struct net *net = sock_net(sk);
pr_debug("msk=%p", msk);
@@ -234,7 +233,7 @@ static void mptcp_pm_add_timer(struct timer_list *timer)
if (entry->retrans_times < ADD_ADDR_RETRANS_MAX)
sk_reset_timer(sk, timer,
- jiffies + mptcp_get_add_addr_timeout(net));
+ jiffies + mptcp_get_add_addr_timeout(sock_net(sk)));
spin_unlock_bh(&msk->pm.lock);
--
2.26.2
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [MPTCP][PATCH v2 net-next] mptcp: fix static checker warnings in mptcp_pm_add_timer
@ 2020-11-10 3:01 ` Geliang Tang
0 siblings, 0 replies; 4+ messages in thread
From: Geliang Tang @ 2020-11-10 3:01 UTC (permalink / raw)
To: Mat Martineau, Matthieu Baerts, David S. Miller, Jakub Kicinski,
Paolo Abeni
Cc: Geliang Tang, netdev, mptcp, Dan Carpenter
Fix the following Smatch complaint:
net/mptcp/pm_netlink.c:213 mptcp_pm_add_timer()
warn: variable dereferenced before check 'msk' (see line 208)
net/mptcp/pm_netlink.c
207 struct mptcp_sock *msk = entry->sock;
208 struct sock *sk = (struct sock *)msk;
209 struct net *net = sock_net(sk);
^^
"msk" dereferenced here.
210
211 pr_debug("msk=%p", msk);
212
213 if (!msk)
^^^^
Too late.
214 return;
215
Fixes: 93f323b9cccc ("mptcp: add a new sysctl add_addr_timeout")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
---
v2:
- drop "mptcp: cleanup for mptcp_pm_alloc_anno_list"
- change tag to net-next.
This patch should be applied to net-next, not -net. Since commit "mptcp:
add a new sysctl add_addr_timeout" is not applied to -net yet.
---
net/mptcp/pm_netlink.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/mptcp/pm_netlink.c b/net/mptcp/pm_netlink.c
index ed60538df7b2..446ef8f07734 100644
--- a/net/mptcp/pm_netlink.c
+++ b/net/mptcp/pm_netlink.c
@@ -206,7 +206,6 @@ static void mptcp_pm_add_timer(struct timer_list *timer)
struct mptcp_pm_add_entry *entry = from_timer(entry, timer, add_timer);
struct mptcp_sock *msk = entry->sock;
struct sock *sk = (struct sock *)msk;
- struct net *net = sock_net(sk);
pr_debug("msk=%p", msk);
@@ -234,7 +233,7 @@ static void mptcp_pm_add_timer(struct timer_list *timer)
if (entry->retrans_times < ADD_ADDR_RETRANS_MAX)
sk_reset_timer(sk, timer,
- jiffies + mptcp_get_add_addr_timeout(net));
+ jiffies + mptcp_get_add_addr_timeout(sock_net(sk)));
spin_unlock_bh(&msk->pm.lock);
--
2.26.2
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [MPTCP] Re: [MPTCP][PATCH v2 net-next] mptcp: fix static checker warnings in mptcp_pm_add_timer
2020-11-10 3:01 ` Geliang Tang
@ 2020-11-12 15:55 ` Jakub Kicinski
-1 siblings, 0 replies; 4+ messages in thread
From: Jakub Kicinski @ 2020-11-12 15:55 UTC (permalink / raw)
To: mptcp
[-- Attachment #1: Type: text/plain, Size: 1026 bytes --]
On Tue, 10 Nov 2020 11:01:43 +0800 Geliang Tang wrote:
> Fix the following Smatch complaint:
>
> net/mptcp/pm_netlink.c:213 mptcp_pm_add_timer()
> warn: variable dereferenced before check 'msk' (see line 208)
>
> net/mptcp/pm_netlink.c
> 207 struct mptcp_sock *msk = entry->sock;
> 208 struct sock *sk = (struct sock *)msk;
> 209 struct net *net = sock_net(sk);
> ^^
> "msk" dereferenced here.
>
> 210
> 211 pr_debug("msk=%p", msk);
> 212
> 213 if (!msk)
> ^^^^
> Too late.
>
> 214 return;
> 215
>
> Fixes: 93f323b9cccc ("mptcp: add a new sysctl add_addr_timeout")
> Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
> Reviewed-by: Dan Carpenter <dan.carpenter(a)oracle.com>
> Reviewed-by: Matthieu Baerts <matthieu.baerts(a)tessares.net>
> Signed-off-by: Geliang Tang <geliangtang(a)gmail.com>
Applied, thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [MPTCP][PATCH v2 net-next] mptcp: fix static checker warnings in mptcp_pm_add_timer
@ 2020-11-12 15:55 ` Jakub Kicinski
0 siblings, 0 replies; 4+ messages in thread
From: Jakub Kicinski @ 2020-11-12 15:55 UTC (permalink / raw)
To: Geliang Tang
Cc: Mat Martineau, Matthieu Baerts, David S. Miller, Paolo Abeni,
netdev, mptcp, Dan Carpenter
On Tue, 10 Nov 2020 11:01:43 +0800 Geliang Tang wrote:
> Fix the following Smatch complaint:
>
> net/mptcp/pm_netlink.c:213 mptcp_pm_add_timer()
> warn: variable dereferenced before check 'msk' (see line 208)
>
> net/mptcp/pm_netlink.c
> 207 struct mptcp_sock *msk = entry->sock;
> 208 struct sock *sk = (struct sock *)msk;
> 209 struct net *net = sock_net(sk);
> ^^
> "msk" dereferenced here.
>
> 210
> 211 pr_debug("msk=%p", msk);
> 212
> 213 if (!msk)
> ^^^^
> Too late.
>
> 214 return;
> 215
>
> Fixes: 93f323b9cccc ("mptcp: add a new sysctl add_addr_timeout")
> Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
> Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
> Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Applied, thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-11-12 15:55 [MPTCP] Re: [MPTCP][PATCH v2 net-next] mptcp: fix static checker warnings in mptcp_pm_add_timer Jakub Kicinski
2020-11-12 15:55 ` Jakub Kicinski
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2020-11-10 3:01 [MPTCP] " Geliang Tang
2020-11-10 3:01 ` Geliang Tang
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