INFO: task syz-executor.4:16696 blocked for more than 143 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26560 pid:16696 ppid: 6614 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 wg_netns_pre_exit+0x15/0x190 drivers/net/wireguard/device.c:402 ops_pre_exit_list net/core/net_namespace.c:158 [inline] setup_net+0x587/0xa30 net/core/net_namespace.c:343 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x920 kernel/fork.c:3077 __do_sys_unshare kernel/fork.c:3151 [inline] __se_sys_unshare kernel/fork.c:3149 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3149 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f31f42cca39 RSP: 002b:00007f31f1842188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f31f43cff60 RCX: 00007f31f42cca39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006c060000 RBP: 00007f31f4326c5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc210953ff R14: 00007f31f1842300 R15: 0000000000022000 INFO: task syz-executor.4:16700 blocked for more than 143 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27248 pid:16700 ppid: 6614 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 ip_tunnel_init_net+0x2d5/0x9d0 net/ipv4/ip_tunnel.c:1069 ops_init+0xaf/0x470 net/core/net_namespace.c:140 setup_net+0x40f/0xa30 net/core/net_namespace.c:326 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x920 kernel/fork.c:3077 __do_sys_unshare kernel/fork.c:3151 [inline] __se_sys_unshare kernel/fork.c:3149 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3149 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f31f42cca39 RSP: 002b:00007f31f1821188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f31f43d0020 RCX: 00007f31f42cca39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000060000000 RBP: 00007f31f4326c5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc210953ff R14: 00007f31f1821300 R15: 0000000000022000 INFO: task syz-executor.4:16734 blocked for more than 143 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28408 pid:16734 ppid: 6614 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 smc_pnet_create_pnetids_list net/smc/smc_pnet.c:798 [inline] smc_pnet_net_init+0x1f9/0x410 net/smc/smc_pnet.c:867 ops_init+0xaf/0x470 net/core/net_namespace.c:140 setup_net+0x40f/0xa30 net/core/net_namespace.c:326 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226 ksys_unshare+0x445/0x920 kernel/fork.c:3077 __do_sys_unshare kernel/fork.c:3151 [inline] __se_sys_unshare kernel/fork.c:3149 [inline] __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3149 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f31f42cca39 RSP: 002b:00007f31f179d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007f31f43d0320 RCX: 00007f31f42cca39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006c060000 RBP: 00007f31f4326c5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc210953ff R14: 00007f31f179d300 R15: 0000000000022000 INFO: task syz-executor.3:16728 blocked for more than 144 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29168 pid:16728 ppid: 6547 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 dev_ioctl+0x279/0xee0 net/core/dev_ioctl.c:611 sock_ioctl+0x537/0x640 net/socket.c:1162 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f2d8a025a39 RSP: 002b:00007f2d8759b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2d8a128f60 RCX: 00007f2d8a025a39 RDX: 0000000020000240 RSI: 00000000000089f0 RDI: 0000000000000003 RBP: 00007f2d8a07fc5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb50daebf R14: 00007f2d8759b300 R15: 0000000000022000 INFO: task syz-executor.0:16740 blocked for more than 144 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28464 pid:16740 ppid: 6541 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 addrconf_set_dstaddr+0xb2/0x2d0 net/ipv6/addrconf.c:2865 inet6_ioctl+0x1ec/0x280 net/ipv6/af_inet6.c:573 sock_do_ioctl+0xcc/0x230 net/socket.c:1118 sock_ioctl+0x2f1/0x640 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fab81d00a39 RSP: 002b:00007fab7f276188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fab81e03f60 RCX: 00007fab81d00a39 RDX: 0000000020000040 RSI: 0000000000008918 RDI: 0000000000000003 RBP: 00007fab81d5ac5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5502cc1f R14: 00007fab7f276300 R15: 0000000000022000 INFO: task syz-executor.0:16757 blocked for more than 144 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29464 pid:16757 ppid: 6541 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb44/0x5960 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425 __mutex_lock_common kernel/locking/mutex.c:669 [inline] __mutex_lock+0xa34/0x12f0 kernel/locking/mutex.c:729 addrconf_set_dstaddr+0xb2/0x2d0 net/ipv6/addrconf.c:2865 inet6_ioctl+0x1ec/0x280 net/ipv6/af_inet6.c:573 sock_do_ioctl+0xcc/0x230 net/socket.c:1118 sock_ioctl+0x2f1/0x640 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fab81d00a39 RSP: 002b:00007fab7f234188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fab81e040e0 RCX: 00007fab81d00a39 RDX: 0000000020000040 RSI: 0000000000008918 RDI: 0000000000000003 RBP: 00007fab81d5ac5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5502cc1f R14: 00007fab7f234300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b981ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 3 locks held by kworker/1:3/2950: #0: ffff888025a09538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888025a09538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888025a09538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888025a09538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888025a09538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888025a09538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc900010dfdb0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 #2: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590 1 lock held by in:imklog/6238: #0: ffff88801debeaf0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 3 locks held by kworker/0:6/8201: #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc90016d5fdb0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 #2: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74 2 locks held by syz-executor.4/16696: #0: ffffffff8d0d5990 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:466 #1: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: wg_netns_pre_exit+0x15/0x190 drivers/net/wireguard/device.c:402 2 locks held by syz-executor.4/16700: #0: ffffffff8d0d5990 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:466 #1: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x2d5/0x9d0 net/ipv4/ip_tunnel.c:1069 1 lock held by syz-executor.4/16722: #0: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5569 2 locks held by syz-executor.4/16734: #0: ffffffff8d0d5990 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:466 #1: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_create_pnetids_list net/smc/smc_pnet.c:798 [inline] #1: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: smc_pnet_net_init+0x1f9/0x410 net/smc/smc_pnet.c:867 1 lock held by syz-executor.3/16728: #0: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x279/0xee0 net/core/dev_ioctl.c:611 1 lock held by syz-executor.0/16740: #0: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_set_dstaddr+0xb2/0x2d0 net/ipv6/addrconf.c:2865 1 lock held by syz-executor.0/16757: #0: ffffffff8d0e90e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_set_dstaddr+0xb2/0x2d0 net/ipv6/addrconf.c:2865 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2966 Comm: systemd-journal Not tainted 5.15.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:link_path_walk.part.0+0x46b/0xd00 fs/namei.c:2258 Code: 41 8b 5e 3c e8 26 a2 a9 ff 4c 89 e0 83 e3 fb 48 be 00 00 00 00 00 fc ff df 48 c1 e8 03 0f b6 14 30 4c 89 e0 83 e0 07 83 c0 03 <38> d0 7c 08 84 d2 0f 85 7c 08 00 00 48 8b 44 24 08 41 89 5e 3c 48 RSP: 0018:ffffc90002acfad0 EFLAGS: 00000202 RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000003 RBP: 00000007b93a0a8b R08: 0000000000000000 R09: 000000000000006a R10: ffffffff81cd4325 R11: 000000000000002e R12: ffffc90002acfc64 R13: eee88cadefc2844e R14: ffffc90002acfc28 R15: ffff888035498029 FS: 00007f88e6c508c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f88e4081000 CR3: 00000000196fd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: link_path_walk fs/namei.c:2222 [inline] path_parentat+0xb1/0x1c0 fs/namei.c:2496 filename_parentat+0x1bb/0x5a0 fs/namei.c:2519 filename_create+0xa1/0x480 fs/namei.c:3639 do_mkdirat+0x94/0x300 fs/namei.c:3900 __do_sys_mkdir fs/namei.c:3931 [inline] __se_sys_mkdir fs/namei.c:3929 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:3929 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f88e5f0b687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff9df1b7c8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff9df1e6e0 RCX: 00007f88e5f0b687 RDX: 00007f88e697ca00 RSI: 00000000000001ed RDI: 000055c9589b88a0 RBP: 00007fff9df1b800 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fff9df1e6e0 R15: 00007fff9df1bcf0 ---------------- Code disassembly (best guess): 0: 41 8b 5e 3c mov 0x3c(%r14),%ebx 4: e8 26 a2 a9 ff callq 0xffa9a22f 9: 4c 89 e0 mov %r12,%rax c: 83 e3 fb and $0xfffffffb,%ebx f: 48 be 00 00 00 00 00 movabs $0xdffffc0000000000,%rsi 16: fc ff df 19: 48 c1 e8 03 shr $0x3,%rax 1d: 0f b6 14 30 movzbl (%rax,%rsi,1),%edx 21: 4c 89 e0 mov %r12,%rax 24: 83 e0 07 and $0x7,%eax 27: 83 c0 03 add $0x3,%eax * 2a: 38 d0 cmp %dl,%al <-- trapping instruction 2c: 7c 08 jl 0x36 2e: 84 d2 test %dl,%dl 30: 0f 85 7c 08 00 00 jne 0x8b2 36: 48 8b 44 24 08 mov 0x8(%rsp),%rax 3b: 41 89 5e 3c mov %ebx,0x3c(%r14) 3f: 48 rex.W