INFO: task systemd-udevd:8951 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:systemd-udevd state:D stack:27144 pid: 8951 ppid: 2970 flags:0x00000000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa0b0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa080 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa220 R08: 0000000000000000 R09: 0000000000000018 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa080 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:9033 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:systemd-udevd state:D stack:27192 pid: 9033 ppid: 2970 flags:0x00000000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa0b0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa080 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa220 R08: 0000000000000000 R09: 0000000000000078 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa080 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:9082 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:systemd-udevd state:D stack:27560 pid: 9082 ppid: 2970 flags:0x00004000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa0b0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa080 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa220 R08: 0000000000000000 R09: 0000000000000090 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa080 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:9159 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:systemd-udevd state:D stack:27776 pid: 9159 ppid: 2970 flags:0x00004000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa0b0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa080 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa220 R08: 0000000000000000 R09: 0000000000000090 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa080 R14: 0000000000000001 R15: 0000000000000000 INFO: task syz-executor.3:9937 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:27120 pid: 9937 ppid: 6575 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: 0033:0x7efca5272a39 RSP: 002b:00007efca27e8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007efca5375f60 RCX: 00007efca5272a39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007efca52ccc5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0d0e174f R14: 00007efca27e8300 R15: 0000000000022000 INFO: task systemd-udevd:10037 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:systemd-udevd state:D stack:27968 pid:10037 ppid: 2970 flags:0x00000000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa0b0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa080 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa220 R08: 0000000000000000 R09: 0000000000000018 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa080 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:10038 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:systemd-udevd state:D stack:28160 pid:10038 ppid: 2970 flags:0x00000000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa068 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa0b0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa080 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa220 R08: 0000000000000000 R09: 0000000000000048 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa080 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:10054 blocked for more than 145 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:28160 pid:10054 ppid: 2970 flags:0x00004000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa658 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa6a0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa670 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa810 R08: 0000000000000000 R09: 00000000000000d8 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa670 R14: 0000000000000001 R15: 0000000000000000 INFO: task systemd-udevd:10055 blocked for more than 145 seconds. Not tainted 5.15.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:systemd-udevd state:D stack:28160 pid:10055 ppid: 2970 flags:0x00004000 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+0x470/0xee0 net/core/dev_ioctl.c:521 sock_do_ioctl+0x15a/0x230 net/socket.c:1132 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: 0033:0x7f6fc0d4f017 RSP: 002b:00007ffe857fa658 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ffe857fa6a0 RCX: 00007f6fc0d4f017 RDX: 00007ffe857fa670 RSI: 0000000000008946 RDI: 0000000000000007 RBP: 00007ffe857fa810 R08: 0000000000000000 R09: 00000000000000d8 R10: 0000000000000001 R11: 0000000000000246 R12: 0000558e11005cf0 R13: 00007ffe857fa670 R14: 0000000000000001 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8b981ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6255: #0: ffff88807876c5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 3 locks held by kworker/1:4/7825: #0: ffff888147a3e938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888147a3e938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888147a3e938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888147a3e938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888147a3e938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888147a3e938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc900056efdb0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 #2: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4590 3 locks held by kworker/1:7/8229: #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888010c65d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 kernel/workqueue.c:2268 #1: ffffc9000bd27db0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 kernel/workqueue.c:2272 #2: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x83/0xe10 net/wireless/reg.c:2423 1 lock held by systemd-udevd/8951: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/9033: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/9082: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/9159: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 2 locks held by syz-executor.3/9937: #0: ffffffff8d0d5750 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2f5/0x760 net/core/net_namespace.c:466 #1: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_init_net+0x2d5/0x9d0 net/ipv4/ip_tunnel.c:1069 1 lock held by syz-executor.3/9941: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline] #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5569 1 lock held by systemd-udevd/10037: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/10038: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/10054: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 1 lock held by systemd-udevd/10055: #0: ffffffff8d0e8ea8 (rtnl_mutex){+.+.}-{3:3}, at: dev_ioctl+0x470/0xee0 net/core/dev_ioctl.c:521 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 26 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1162 Comm: kworker/u4:5 Not tainted 5.15.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:memcmp+0x178/0x1c0 lib/string.c:935 Code: 38 f2 40 0f 9e c6 84 d2 0f 95 c2 40 84 d6 0f 84 48 ff ff ff be 08 00 00 00 4c 89 e7 e8 e1 b3 c7 fd e9 4b ff ff ff 48 83 c4 08 <31> c0 5b 5d 41 5c 41 5d 41 5e c3 48 89 df 89 44 24 04 e8 d1 b2 c7 RSP: 0018:ffffc90004f6f9d0 EFLAGS: 00000092 RAX: ffffffff81bdee7d RBX: ffffffff8eeeb35a RCX: 0000000000000001 RDX: 00000000000000e9 RSI: ffffffff8eeeb359 RDI: ffffffff81bdee7c RBP: ffffffff81bdee7d R08: 0000000000000002 R09: 000000000002263d R10: ffffffff83f4a914 R11: 000000000000003f R12: ffffffff81bdee7c R13: 0000000000000001 R14: dffffc0000000000 R15: ffffffff8baac4e0 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7c5aaab000 CR3: 000000000b68e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcmp include/linux/fortify-string.h:235 [inline] __text_poke+0x59f/0x8c0 arch/x86/kernel/alternative.c:873 text_poke_bp_batch+0x3d7/0x560 arch/x86/kernel/alternative.c:1178 text_poke_flush arch/x86/kernel/alternative.c:1268 [inline] text_poke_flush arch/x86/kernel/alternative.c:1265 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1275 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 jump_label_update+0x1d5/0x430 kernel/jump_label.c:830 static_key_enable_cpuslocked+0x1b1/0x260 kernel/jump_label.c:177 static_key_enable+0x16/0x20 kernel/jump_label.c:190 toggle_allocation_gate mm/kfence/core.c:626 [inline] toggle_allocation_gate+0x100/0x390 mm/kfence/core.c:618 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 38 f2 cmp %dh,%dl 2: 40 0f 9e c6 setle %sil 6: 84 d2 test %dl,%dl 8: 0f 95 c2 setne %dl b: 40 84 d6 test %dl,%sil e: 0f 84 48 ff ff ff je 0xffffff5c 14: be 08 00 00 00 mov $0x8,%esi 19: 4c 89 e7 mov %r12,%rdi 1c: e8 e1 b3 c7 fd callq 0xfdc7b402 21: e9 4b ff ff ff jmpq 0xffffff71 26: 48 83 c4 08 add $0x8,%rsp * 2a: 31 c0 xor %eax,%eax <-- trapping instruction 2c: 5b pop %rbx 2d: 5d pop %rbp 2e: 41 5c pop %r12 30: 41 5d pop %r13 32: 41 5e pop %r14 34: c3 retq 35: 48 89 df mov %rbx,%rdi 38: 89 44 24 04 mov %eax,0x4(%rsp) 3c: e8 .byte 0xe8 3d: d1 .byte 0xd1 3e: b2 c7 mov $0xc7,%dl