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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. > Direct all questions to syzkaller@...glegroups.com. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is > merged > into any tree, please reply to this email with: > #syz fix: exact-commit-title > If you want to test a patch for this bug, please reply with: > #syz test: git://repo/address.git branch > and provide the patch inline or as an attachment. > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > Note: all commands must start from beginning of the line in the email body. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@...glegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a1143e44e58485f05655fa8ae%40google.com. > For more options, visit https://groups.google.com/d/optout. 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