INFO: task syz-executor.2:14508 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28752 pid:14508 ppid: 8468 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 sock_do_ioctl+0x11e/0x260 net/socket.c:1050 sock_ioctl+0x416/0x5f0 net/socket.c:1177 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f92fe62ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000003 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffef7c7ca2f R14: 00007f92fe62b9c0 R15: 000000000119bf8c INFO: task syz-executor.5:14536 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:25248 pid:14536 ppid: 8541 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x2bf/0x370 net/socket.c:2432 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f07be9c9c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 000000000119bfc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffe31340e8f R14: 00007f07be9ca9c0 R15: 000000000119bf8c INFO: task syz-executor.1:14555 blocked for more than 144 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28160 pid:14555 ppid: 8466 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033 __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:417 [inline] ipv6_setsockopt+0x3c8/0x5520 net/ipv6/ipv6_sockglue.c:1003 __sys_setsockopt+0x4b8/0x880 net/socket.c:2115 __do_sys_setsockopt net/socket.c:2126 [inline] __se_sys_setsockopt net/socket.c:2123 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2123 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007fac95307c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 000000000000002e RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000119bfd0 R08: 0000000000000108 R09: 0000000000000000 R10: 0000000020000100 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffed3d94f0f R14: 00007fac953089c0 R15: 000000000119bf8c Showing all locks held in the system: 2 locks held by kworker/u4:0/8: 4 locks held by kworker/u4:1/24: #0: ffff888011293138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248 #1: ffffc90000defd78 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250 #2: ffffffff8cce2cf0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xac/0xbd0 net/core/net_namespace.c:566 #3: ffffffff8ccee648 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x1b/0x1a0 drivers/net/wireguard/device.c:401 3 locks held by kworker/1:1/34: #0: ffff8880217df938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248 #1: ffffc90000e2fd78 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250 #2: ffffffff8ccee648 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4570 1 lock held by khungtaskd/1644: #0: ffffffff8bd11740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 2 locks held by systemd-journal/4865: 1 lock held by in:imklog/8125: #0: ffff888026148870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 3 locks held by kworker/u4:5/10172: 1 lock held by syz-executor.2/14508: #0: ffffffff8ccee648 (rtnl_mutex){+.+.}-{3:3}, at: sock_do_ioctl+0x11e/0x260 net/socket.c:1050 1 lock held by syz-executor.5/14536: #0: ffffffff8ccee648 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8ccee648 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550 2 locks held by syz-executor.5/14543: 1 lock held by syz-executor.1/14555: #0: ffffffff8ccee648 (rtnl_mutex){+.+.}-{3:3}, at: do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:417 [inline] #0: ffffffff8ccee648 (rtnl_mutex){+.+.}-{3:3}, at: ipv6_setsockopt+0x3c8/0x5520 net/ipv6/ipv6_sockglue.c:1003 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1644 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x137/0x1be lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 107 Comm: kworker/u4:3 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_tt_purge RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:99 [inline] RIP: 0010:do_raw_spin_unlock+0x6f/0x8a0 kernel/locking/spinlock_debug.c:138 Code: 00 4c 89 ff be 04 00 00 00 e8 dd 96 5d 00 4c 89 f8 48 c1 e8 03 8a 04 18 84 c0 0f 85 25 04 00 00 41 83 3f 00 0f 84 9a 01 00 00 <4d> 8d 6f 10 4d 89 ec 49 c1 ec 03 41 80 3c 1c 00 74 08 4c 89 ef e8 RSP: 0018:ffffc900011ffb58 EFLAGS: 00000202 RAX: 1ffff1100ea5c600 RBX: dffffc0000000000 RCX: ffffffff815d8b33 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880752e31c0 RBP: 00000000000000c7 R08: dffffc0000000000 R09: ffffed100ea5c639 R10: ffffed100ea5c639 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffffff892d27af R15: ffff8880752e31c0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11c30f5000 CR3: 0000000011e3d000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:175 [inline] _raw_spin_unlock_bh+0x1f/0x30 kernel/locking/spinlock.c:207 spin_unlock_bh include/linux/spinlock.h:399 [inline] batadv_tt_local_purge+0x2bf/0x350 net/batman-adv/translation-table.c:1367 batadv_tt_purge+0x31/0x960 net/batman-adv/translation-table.c:3589 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296