ip6_tunnel: – xmit: Local address not yet configured! ip6_tunnel: – xmit: Local address not yet configured! INFO: task syz-executor.4:25616 blocked for more than 140 seconds. Not tainted 4.9.194+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28736 25616 21720 0x80000004 0000000000000087 ffff8801a1305f00 ffff8801d9ccbc80 ffff8801db621000 ffff8801cf31c740 ffff8801db621018 ffff8801c7d47890 ffffffff8281af8e 0000000041b58ab3 ffff8801a1305f00 00ff8801c7d477e0 ffff8801db6218f0 Call Trace: [<000000002ef96765>] schedule+0x92/0x1c0 kernel/sched/core.c:3546 [<000000001e90b4a1>] rwsem_down_read_failed+0x258/0x3e0 kernel/locking/rwsem-xadd.c:283 [<00000000f960e6b3>] call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 [<00000000c16f989f>] __down_read arch/x86/include/asm/rwsem.h:65 [inline] [<00000000c16f989f>] down_read+0x52/0xb0 kernel/locking/rwsem.c:24 [<00000000be35f00b>] exit_mm kernel/exit.c:480 [inline] [<00000000be35f00b>] do_exit+0x3bb/0x2aa0 kernel/exit.c:829 [<00000000b75f9aed>] do_group_exit+0x111/0x300 kernel/exit.c:946 [<000000003894174d>] get_signal+0x377/0x1cb0 kernel/signal.c:2395 [<00000000fd382696>] do_signal+0x9c/0x1920 arch/x86/kernel/signal.c:812 [<0000000052e9b24f>] exit_to_usermode_loop+0x11c/0x160 arch/x86/entry/common.c:159 [<00000000b228dea3>] prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline] [<00000000b228dea3>] syscall_return_slowpath arch/x86/entry/common.c:266 [inline] [<00000000b228dea3>] do_syscall_64+0x3ab/0x5c0 arch/x86/entry/common.c:293 [<00000000b9f72c2a>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Showing all locks held in the system: 2 locks held by khungtaskd/24: #0: (rcu_read_lock){......}, at: [<00000000c582a346>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline] #0: (rcu_read_lock){......}, at: [<00000000c582a346>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263 #1: (tasklist_lock){.+.+..}, at: [<000000004fb2999c>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336 2 locks held by getty/2023: #0: (&tty->ldisc_sem){++++++}, at: [<00000000b429e1a2>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+...}, at: [<00000000c9cc0091>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.4/25616: #0: (&mm->mmap_sem){++++++}, at: [<00000000be35f00b>] exit_mm kernel/exit.c:480 [inline] #0: (&mm->mmap_sem){++++++}, at: [<00000000be35f00b>] do_exit+0x3bb/0x2aa0 kernel/exit.c:829 1 lock held by syz-executor.4/25619: #0: (&mm->mmap_sem){++++++}, at: [<00000000be35f00b>] exit_mm kernel/exit.c:480 [inline] #0: (&mm->mmap_sem){++++++}, at: [<00000000be35f00b>] do_exit+0x3bb/0x2aa0 kernel/exit.c:829 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.194+ #0 ffff8801d98efcc8 ffffffff81b67001 0000000000000000 0000000000000000 0000000000000000 ffffffff81099d01 dffffc0000000000 ffff8801d98efd00 ffffffff81b7229c 0000000000000000 0000000000000000 0000000000000000 Call Trace: [<00000000ceb8168e>] __dump_stack lib/dump_stack.c:15 [inline] [<00000000ceb8168e>] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [<00000000f7d9462b>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99 [<00000000c6364d0c>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60 [<000000005e9bb029>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 [<000000005fe2682e>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline] [<000000005fe2682e>] check_hung_task kernel/hung_task.c:126 [inline] [<000000005fe2682e>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline] [<000000005fe2682e>] watchdog+0x670/0xaf0 kernel/hung_task.c:263 [<0000000007f76582>] kthread+0x278/0x310 kernel/kthread.c:211 [<00000000597afad2>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 25620 Comm: syz-executor.4 Not tainted 4.9.194+ #0 task: 00000000de2f360f task.stack: 000000007f8063de RIP: 0010:[] c [<00000000573310fd>] mark_held_locks+0xc1/0x100 kernel/locking/lockdep.c:2664 RSP: 0000:ffff8801c6d37ac0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000002 RCX: 1ffff10039e6311f RDX: 1ffffffff079a8f0 RSI: ffff8801cf3188d8 RDI: ffffffff83cd4780 RBP: ffff8801c6d37af8 R08: 0000000000000000 R09: ffff8801cf3188f8 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801cf3188b0 R13: 0000000000000002 R14: ffff8801cf318000 R15: dffffc0000000000 FS: 00007f5513d74700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000adf308 CR3: 00000001b95cc000 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Stack: 0000000000000000c 00000003813e18e9c ffff8801cf318000c ffffffff8281f497c ffff8801d7c179e0c ffff8801cf318000c ffffffff841f8b40c ffff8801c6d37b18c ffffffff8120cdb0c 0000000000000246c ffff8801d7c179e8c ffff8801c6d37b28c Call Trace: [<000000007ace2ac1>] __trace_hardirqs_on_caller kernel/locking/lockdep.c:2681 [inline] [<000000007ace2ac1>] trace_hardirqs_on_caller+0x260/0x5a0 kernel/locking/lockdep.c:2736 [<00000000b2110a21>] trace_hardirqs_on+0xd/0x10 kernel/locking/lockdep.c:2743 [<000000000d23c7ec>] __mutex_lock_common kernel/locking/mutex.c:603 [inline] [<000000000d23c7ec>] mutex_lock_nested+0x6c7/0x920 kernel/locking/mutex.c:621 [<000000001092bb54>] perf_mmap+0x4d9/0x1580 kernel/events/core.c:5278 [<00000000f86c8dbe>] mmap_region+0x7e7/0xfa0 mm/mmap.c:1726 [<0000000078b62be6>] do_mmap+0x539/0xbc0 mm/mmap.c:1505 [<00000000ae1a35c6>] do_mmap_pgoff include/linux/mm.h:2071 [inline] [<00000000ae1a35c6>] vm_mmap_pgoff+0x179/0x1c0 mm/util.c:329 [<00000000eba9fe8f>] SYSC_mmap_pgoff mm/mmap.c:1555 [inline] [<00000000eba9fe8f>] SyS_mmap_pgoff+0xfa/0x1b0 mm/mmap.c:1513 [<000000009cd17511>] SYSC_mmap arch/x86/kernel/sys_x86_64.c:96 [inline] [<000000009cd17511>] SyS_mmap+0x16/0x20 arch/x86/kernel/sys_x86_64.c:87 [<0000000004f57ae8>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288 [<00000000b9f72c2a>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb Code: c75 c4d c0f cb6 c46 c22 c8b c55 cd4 ca8 c03 c41 c0f c44 cd5 ca8 c04 c74 c0c c4c c89 cf7 ce8 c6f cec cff cff c85 cc0 c74 c11 c83 cc3 c01 c41 c39 c9e ca8 c08 c00 c00 c7f cae c c01 c00 c00 c00 c48 c83 cc4 c10 c5b c41 c5c c41 c5d c41 c5e c41 c5f c5d cc3 c89 c