loop3: p251 start 1 is beyond EOD, truncated loop3: p252 start 1 is beyond EOD, truncated loop3: p253 start 1 is beyond EOD, truncated loop3: p254 start 1 is beyond EOD, truncated loop3: p255 start 1 is beyond EOD, truncated INFO: task syz-executor2:12136 blocked for more than 140 seconds. Not tainted 4.14.68+ #4 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D29448 12136 15382 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893 xfrm_netlink_rcv+0x59/0x80 net/xfrm/xfrm_user.c:2649 netlink_unicast_kernel net/netlink/af_netlink.c:1286 [inline] netlink_unicast+0x46d/0x620 net/netlink/af_netlink.c:1312 netlink_sendmsg+0x664/0xbe0 net/netlink/af_netlink.c:1877 sock_sendmsg_nosec net/socket.c:645 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:655 ___sys_sendmsg+0x741/0x890 net/socket.c:2061 __sys_sendmsg+0xca/0x170 net/socket.c:2095 SYSC_sendmsg net/socket.c:2106 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2102 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457099 RSP: 002b:00007f32bb3ecc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f32bb3ed6d4 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 000000002000b000 RDI: 0000000000000006 RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d4c20 R14: 00000000004c915b R15: 0000000000000002 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/1867: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa2/0xc0 fs/file.c:768 2 locks held by getty/1995: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142 1 lock held by syz-executor2/12136: #0: (&net->xfrm.xfrm_cfg_mutex){+.+.}, at: [] xfrm_netlink_rcv+0x59/0x80 net/xfrm/xfrm_user.c:2649 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.68+ #4 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 26620 Comm: syz-executor3 Not tainted 4.14.68+ #4 task: ffff880197fd8000 task.stack: ffff8801b7270000 RIP: 0033:0x4023c4 RSP: 002b:00007f3fbe8a0690 EFLAGS: 00000206 RAX: 000000004ef50f8b RBX: 0000000000000007 RCX: 0000000000457099 RDX: 0000000000000000 RSI: 00007f3fbe8a06c0 RDI: 0000000000000007 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d7008 R14: 00000000004ca112 R15: 0000000000000000 FS: 00007f3fbe8a1700(0000) GS:ffff8801d7800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd47ee7a330 CR3: 000000017eda0002 CR4: 00000000001606b0 DR0: 00000000200001c0 DR1: 00000000200001c0 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600