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Message-ID: <CACT4Y+bxubQ0yqi777mgQdT6paPS+wWQo79T+jPqztPJ=gTYhw@mail.gmail.com>
Date: Sat, 17 Feb 2018 09:15:53 +0100
From: Dmitry Vyukov <dvyukov@...gle.com>
To: syzbot <syzbot+749d9d87c294c00ca856@...kaller.appspotmail.com>
Cc: Andrei Vagin <avagin@...tuozzo.com>,
David Miller <davem@...emloft.net>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Florian Westphal <fw@...len.de>,
Kirill Tkhai <ktkhai@...tuozzo.com>,
LKML <linux-kernel@...r.kernel.org>,
netdev <netdev@...r.kernel.org>,
Nicolas Dichtel <nicolas.dichtel@...nd.com>,
roman.kapl@...go.com, syzkaller-bugs@...glegroups.com,
Jon Maloy <jon.maloy@...csson.com>,
Ying Xue <ying.xue@...driver.com>,
tipc-discussion@...ts.sourceforge.net
Subject: Re: BUG: sleeping function called from invalid context at
net/core/sock.c:LINE (3)
On Sat, Feb 17, 2018 at 4:00 AM, syzbot
<syzbot+749d9d87c294c00ca856@...kaller.appspotmail.com> wrote:
> Hello,
>
> syzbot hit the following crash on net-next commit
> 65bd449c32c2745df61913ab54087e77f9d9b70d (Fri Feb 16 20:26:35 2018 +0000)
> Merge branch 'tipc-de-generealize-topology-server'
+tipc maintainers
> So far this crash happened 25 times on net-next.
> C reproducer is attached.
> syzkaller reproducer is attached.
> Raw console output is attached.
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached.
>
> IMPORTANT: if you fix the bug, please add the following tag to the commit:
> Reported-by: syzbot+749d9d87c294c00ca856@...kaller.appspotmail.com
> It will help syzbot understand when the bug is fixed. See footer for
> details.
> If you forward the report, please keep this part and the footer.
>
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 0 PID: 85 Comm: kworker/u4:3 Not tainted 4.16.0-rc1+ #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G W 4.16.0-rc1+
> #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
> IPVS: ftp: loaded support on port[0] = 21
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G W 4.16.0-rc1+
> #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 1 PID: 85 Comm: kworker/u4:3 Tainted: G W 4.16.0-rc1+
> #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
> IPVS: ftp: loaded support on port[0] = 21
> IPVS: ftp: loaded support on port[0] = 21
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G W 4.16.0-rc1+
> #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G W 4.16.0-rc1+
> #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
> IPVS: ftp: loaded support on port[0] = 21
> IPVS: ftp: loaded support on port[0] = 21
> IPVS: ftp: loaded support on port[0] = 21
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G W 4.16.0-rc1+
> #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
> IPVS: ftp: loaded support on port[0] = 21
> BUG: sleeping function called from invalid context at net/core/sock.c:2769
> in_atomic(): 1, irqs_disabled(): 0, pid: 85, name: kworker/u4:3
> 5 locks held by kworker/u4:3/85:
> #0: ((wq_completion)"%s""netns"){+.+.}, at: [<00000000c9792deb>]
> process_one_work+0xaaf/0x1af0 kernel/workqueue.c:2084
> #1: (net_cleanup_work){+.+.}, at: [<00000000adc12e2a>]
> process_one_work+0xb01/0x1af0 kernel/workqueue.c:2088
> #2: (net_sem){++++}, at: [<000000009ccb5669>] cleanup_net+0x23f/0xd20
> net/core/net_namespace.c:494
> #3: (net_mutex){+.+.}, at: [<00000000a92767d9>] cleanup_net+0xa7d/0xd20
> net/core/net_namespace.c:496
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> spin_lock_bh include/linux/spinlock.h:315 [inline]
> #4: (&(&srv->idr_lock)->rlock){+...}, at: [<000000001343e568>]
> tipc_topsrv_stop+0x231/0x610 net/tipc/topsrv.c:685
> CPU: 0 PID: 85 Comm: kworker/u4:3 Tainted: G W 4.16.0-rc1+
> #230
> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
> Google 01/01/2011
> Workqueue: netns cleanup_net
> Call Trace:
> __dump_stack lib/dump_stack.c:17 [inline]
> dump_stack+0x194/0x257 lib/dump_stack.c:53
> ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6128
> __might_sleep+0x95/0x190 kernel/sched/core.c:6081
> lock_sock_nested+0x37/0x110 net/core/sock.c:2769
> lock_sock include/net/sock.h:1463 [inline]
> tipc_release+0x103/0xff0 net/tipc/socket.c:572
> sock_release+0x8d/0x1e0 net/socket.c:594
> tipc_topsrv_stop+0x3c0/0x610 net/tipc/topsrv.c:696
> tipc_exit_net+0x15/0x40 net/tipc/core.c:96
> ops_exit_list.isra.6+0xae/0x150 net/core/net_namespace.c:148
> cleanup_net+0x6ba/0xd20 net/core/net_namespace.c:529
> process_one_work+0xbbf/0x1af0 kernel/workqueue.c:2113
> worker_thread+0x223/0x1990 kernel/workqueue.c:2247
> kthread+0x33c/0x400 kernel/kthread.c:238
> ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:429
>
>
> ---
> This bug is generated by a dumb bot. It may contain errors.
> See https://goo.gl/tpsmEJ for details.
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