--- /dev/null
+From foo@baz Wed 22 May 2019 07:38:16 PM CEST
+From: Eric Dumazet <edumazet@google.com>
+Date: Thu, 16 May 2019 08:09:57 -0700
+Subject: net: avoid weird emergency message
+
+From: Eric Dumazet <edumazet@google.com>
+
+[ Upstream commit d7c04b05c9ca14c55309eb139430283a45c4c25f ]
+
+When host is under high stress, it is very possible thread
+running netdev_wait_allrefs() returns from msleep(250)
+10 seconds late.
+
+This leads to these messages in the syslog :
+
+[...] unregister_netdevice: waiting for syz_tun to become free. Usage count = 0
+
+If the device refcount is zero, the wait is over.
+
+Signed-off-by: Eric Dumazet <edumazet@google.com>
+Reported-by: syzbot <syzkaller@googlegroups.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/core/dev.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/net/core/dev.c
++++ b/net/core/dev.c
+@@ -6986,7 +6986,7 @@ static void netdev_wait_allrefs(struct n
+
+ refcnt = netdev_refcnt_read(dev);
+
+- if (time_after(jiffies, warning_time + 10 * HZ)) {
++ if (refcnt && time_after(jiffies, warning_time + 10 * HZ)) {
+ pr_emerg("unregister_netdevice: waiting for %s to become free. Usage count = %d\n",
+ dev->name, refcnt);
+ warning_time = jiffies;
--- /dev/null
+From foo@baz Wed 22 May 2019 07:38:16 PM CEST
+From: Yunjian Wang <wangyunjian@huawei.com>
+Date: Tue, 14 May 2019 19:03:19 +0800
+Subject: net/mlx4_core: Change the error print to info print
+
+From: Yunjian Wang <wangyunjian@huawei.com>
+
+[ Upstream commit 00f9fec48157f3734e52130a119846e67a12314b ]
+
+The error print within mlx4_flow_steer_promisc_add() should
+be a info print.
+
+Fixes: 592e49dda812 ('net/mlx4: Implement promiscuous mode with device managed flow-steering')
+Signed-off-by: Yunjian Wang <wangyunjian@huawei.com>
+Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/net/ethernet/mellanox/mlx4/mcg.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/mellanox/mlx4/mcg.c
++++ b/drivers/net/ethernet/mellanox/mlx4/mcg.c
+@@ -1485,7 +1485,7 @@ int mlx4_flow_steer_promisc_add(struct m
+ rule.port = port;
+ rule.qpn = qpn;
+ INIT_LIST_HEAD(&rule.list);
+- mlx4_err(dev, "going promisc on %x\n", port);
++ mlx4_info(dev, "going promisc on %x\n", port);
+
+ return mlx4_flow_attach(dev, &rule, regid_p);
+ }
--- /dev/null
+From foo@baz Wed 22 May 2019 07:38:16 PM CEST
+From: YueHaibing <yuehaibing@huawei.com>
+Date: Tue, 14 May 2019 22:55:32 +0800
+Subject: ppp: deflate: Fix possible crash in deflate_init
+
+From: YueHaibing <yuehaibing@huawei.com>
+
+[ Upstream commit 3ebe1bca58c85325c97a22d4fc3f5b5420752e6f ]
+
+BUG: unable to handle kernel paging request at ffffffffa018f000
+PGD 3270067 P4D 3270067 PUD 3271063 PMD 2307eb067 PTE 0
+Oops: 0000 [#1] PREEMPT SMP
+CPU: 0 PID: 4138 Comm: modprobe Not tainted 5.1.0-rc7+ #1
+Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
+rel-1.9.3-0-ge2fc41e-prebuilt.qemu-project.org 04/01/2014
+RIP: 0010:ppp_register_compressor+0x3e/0xd0 [ppp_generic]
+Code: 98 4a 3f e2 48 8b 15 c1 67 00 00 41 8b 0c 24 48 81 fa 40 f0 19 a0
+75 0e eb 35 48 8b 12 48 81 fa 40 f0 19 a0 74
+RSP: 0018:ffffc90000d93c68 EFLAGS: 00010287
+RAX: ffffffffa018f000 RBX: ffffffffa01a3000 RCX: 000000000000001a
+RDX: ffff888230c750a0 RSI: 0000000000000000 RDI: ffffffffa019f000
+RBP: ffffc90000d93c80 R08: 0000000000000001 R09: 0000000000000000
+R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa0194080
+R13: ffff88822ee1a700 R14: 0000000000000000 R15: ffffc90000d93e78
+FS: 00007f2339557540(0000) GS:ffff888237a00000(0000)
+knlGS:0000000000000000
+CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
+CR2: ffffffffa018f000 CR3: 000000022bde4000 CR4: 00000000000006f0
+Call Trace:
+ ? 0xffffffffa01a3000
+ deflate_init+0x11/0x1000 [ppp_deflate]
+ ? 0xffffffffa01a3000
+ do_one_initcall+0x6c/0x3cc
+ ? kmem_cache_alloc_trace+0x248/0x3b0
+ do_init_module+0x5b/0x1f1
+ load_module+0x1db1/0x2690
+ ? m_show+0x1d0/0x1d0
+ __do_sys_finit_module+0xc5/0xd0
+ __x64_sys_finit_module+0x15/0x20
+ do_syscall_64+0x6b/0x1d0
+ entry_SYSCALL_64_after_hwframe+0x49/0xbe
+
+If ppp_deflate fails to register in deflate_init,
+module initialization failed out, however
+ppp_deflate_draft may has been regiestred and not
+unregistered before return.
+Then the seconed modprobe will trigger crash like this.
+
+Reported-by: Hulk Robot <hulkci@huawei.com>
+Signed-off-by: YueHaibing <yuehaibing@huawei.com>
+Acked-by: Guillaume Nault <gnault@redhat.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/net/ppp/ppp_deflate.c | 20 ++++++++++++++------
+ 1 file changed, 14 insertions(+), 6 deletions(-)
+
+--- a/drivers/net/ppp/ppp_deflate.c
++++ b/drivers/net/ppp/ppp_deflate.c
+@@ -610,12 +610,20 @@ static struct compressor ppp_deflate_dra
+
+ static int __init deflate_init(void)
+ {
+- int answer = ppp_register_compressor(&ppp_deflate);
+- if (answer == 0)
+- printk(KERN_INFO
+- "PPP Deflate Compression module registered\n");
+- ppp_register_compressor(&ppp_deflate_draft);
+- return answer;
++ int rc;
++
++ rc = ppp_register_compressor(&ppp_deflate);
++ if (rc)
++ return rc;
++
++ rc = ppp_register_compressor(&ppp_deflate_draft);
++ if (rc) {
++ ppp_unregister_compressor(&ppp_deflate);
++ return rc;
++ }
++
++ pr_info("PPP Deflate Compression module registered\n");
++ return 0;
+ }
+
+ static void __exit deflate_cleanup(void)
ext4-zero-out-the-unused-memory-region-in-the-extent-tree-block.patch
alsa-hda-realtek-fix-for-lenovo-b50-70-inverted-internal-microphone-bug.patch
kvm-x86-skip-efer-vs.-guest-cpuid-checks-for-host-initiated-writes.patch
+net-avoid-weird-emergency-message.patch
+net-mlx4_core-change-the-error-print-to-info-print.patch
+ppp-deflate-fix-possible-crash-in-deflate_init.patch
+tipc-switch-order-of-device-registration-to-fix-a-crash.patch
+tipc-fix-modprobe-tipc-failed-after-switch-order-of-device-registration.patch
--- /dev/null
+From foo@baz Wed 22 May 2019 07:38:16 PM CEST
+From: Junwei Hu <hujunwei4@huawei.com>
+Date: Fri, 17 May 2019 19:27:34 +0800
+Subject: tipc: fix modprobe tipc failed after switch order of device registration
+
+From: Junwei Hu <hujunwei4@huawei.com>
+
+[ Upstream commit 532b0f7ece4cb2ffd24dc723ddf55242d1188e5e ]
+
+Error message printed:
+modprobe: ERROR: could not insert 'tipc': Address family not
+supported by protocol.
+when modprobe tipc after the following patch: switch order of
+device registration, commit 7e27e8d6130c
+("tipc: switch order of device registration to fix a crash")
+
+Because sock_create_kern(net, AF_TIPC, ...) is called by
+tipc_topsrv_create_listener() in the initialization process
+of tipc_net_ops, tipc_socket_init() must be execute before that.
+
+I move tipc_socket_init() into function tipc_init_net().
+
+Fixes: 7e27e8d6130c
+("tipc: switch order of device registration to fix a crash")
+Signed-off-by: Junwei Hu <hujunwei4@huawei.com>
+Reported-by: Wang Wang <wangwang2@huawei.com>
+Reviewed-by: Kang Zhou <zhoukang7@huawei.com>
+Reviewed-by: Suanming Mou <mousuanming@huawei.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/tipc/core.c | 14 +++++++-------
+ 1 file changed, 7 insertions(+), 7 deletions(-)
+
+--- a/net/tipc/core.c
++++ b/net/tipc/core.c
+@@ -61,6 +61,10 @@ static int __net_init tipc_init_net(stru
+ INIT_LIST_HEAD(&tn->node_list);
+ spin_lock_init(&tn->node_list_lock);
+
++ err = tipc_socket_init();
++ if (err)
++ goto out_socket;
++
+ err = tipc_sk_rht_init(net);
+ if (err)
+ goto out_sk_rht;
+@@ -87,6 +91,8 @@ out_subscr:
+ out_nametbl:
+ tipc_sk_rht_destroy(net);
+ out_sk_rht:
++ tipc_socket_stop();
++out_socket:
+ return err;
+ }
+
+@@ -97,6 +103,7 @@ static void __net_exit tipc_exit_net(str
+ tipc_bcast_stop(net);
+ tipc_nametbl_stop(net);
+ tipc_sk_rht_destroy(net);
++ tipc_socket_stop();
+ }
+
+ static struct pernet_operations tipc_net_ops = {
+@@ -134,10 +141,6 @@ static int __init tipc_init(void)
+ if (err)
+ goto out_pernet;
+
+- err = tipc_socket_init();
+- if (err)
+- goto out_socket;
+-
+ err = tipc_bearer_setup();
+ if (err)
+ goto out_bearer;
+@@ -145,8 +148,6 @@ static int __init tipc_init(void)
+ pr_info("Started in single node mode\n");
+ return 0;
+ out_bearer:
+- tipc_socket_stop();
+-out_socket:
+ unregister_pernet_subsys(&tipc_net_ops);
+ out_pernet:
+ tipc_unregister_sysctl();
+@@ -162,7 +163,6 @@ out_netlink:
+ static void __exit tipc_exit(void)
+ {
+ tipc_bearer_cleanup();
+- tipc_socket_stop();
+ unregister_pernet_subsys(&tipc_net_ops);
+ tipc_netlink_stop();
+ tipc_netlink_compat_stop();
--- /dev/null
+From foo@baz Wed 22 May 2019 07:38:16 PM CEST
+From: Junwei Hu <hujunwei4@huawei.com>
+Date: Thu, 16 May 2019 10:51:15 +0800
+Subject: tipc: switch order of device registration to fix a crash
+
+From: Junwei Hu <hujunwei4@huawei.com>
+
+[ Upstream commit 7e27e8d6130c5e88fac9ddec4249f7f2337fe7f8 ]
+
+When tipc is loaded while many processes try to create a TIPC socket,
+a crash occurs:
+ PANIC: Unable to handle kernel paging request at virtual
+ address "dfff20000000021d"
+ pc : tipc_sk_create+0x374/0x1180 [tipc]
+ lr : tipc_sk_create+0x374/0x1180 [tipc]
+ Exception class = DABT (current EL), IL = 32 bits
+ Call trace:
+ tipc_sk_create+0x374/0x1180 [tipc]
+ __sock_create+0x1cc/0x408
+ __sys_socket+0xec/0x1f0
+ __arm64_sys_socket+0x74/0xa8
+ ...
+
+This is due to race between sock_create and unfinished
+register_pernet_device. tipc_sk_insert tries to do
+"net_generic(net, tipc_net_id)".
+but tipc_net_id is not initialized yet.
+
+So switch the order of the two to close the race.
+
+This can be reproduced with multiple processes doing socket(AF_TIPC, ...)
+and one process doing module removal.
+
+Fixes: a62fbccecd62 ("tipc: make subscriber server support net namespace")
+Signed-off-by: Junwei Hu <hujunwei4@huawei.com>
+Reported-by: Wang Wang <wangwang2@huawei.com>
+Reviewed-by: Xiaogang Wang <wangxiaogang3@huawei.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/tipc/core.c | 14 +++++++-------
+ 1 file changed, 7 insertions(+), 7 deletions(-)
+
+--- a/net/tipc/core.c
++++ b/net/tipc/core.c
+@@ -126,10 +126,6 @@ static int __init tipc_init(void)
+ if (err)
+ goto out_netlink_compat;
+
+- err = tipc_socket_init();
+- if (err)
+- goto out_socket;
+-
+ err = tipc_register_sysctl();
+ if (err)
+ goto out_sysctl;
+@@ -138,6 +134,10 @@ static int __init tipc_init(void)
+ if (err)
+ goto out_pernet;
+
++ err = tipc_socket_init();
++ if (err)
++ goto out_socket;
++
+ err = tipc_bearer_setup();
+ if (err)
+ goto out_bearer;
+@@ -145,12 +145,12 @@ static int __init tipc_init(void)
+ pr_info("Started in single node mode\n");
+ return 0;
+ out_bearer:
++ tipc_socket_stop();
++out_socket:
+ unregister_pernet_subsys(&tipc_net_ops);
+ out_pernet:
+ tipc_unregister_sysctl();
+ out_sysctl:
+- tipc_socket_stop();
+-out_socket:
+ tipc_netlink_compat_stop();
+ out_netlink_compat:
+ tipc_netlink_stop();
+@@ -162,10 +162,10 @@ out_netlink:
+ static void __exit tipc_exit(void)
+ {
+ tipc_bearer_cleanup();
++ tipc_socket_stop();
+ unregister_pernet_subsys(&tipc_net_ops);
+ tipc_netlink_stop();
+ tipc_netlink_compat_stop();
+- tipc_socket_stop();
+ tipc_unregister_sysctl();
+
+ pr_info("Deactivated\n");
projects / thirdparty / kernel / stable-queue.git / commitdiff
