ldm_parse_privhead(): Cannot find PRIVHEAD structure. LDM database is corrupt. Aborting. ldm_validate_privheads(): Cannot find PRIVHEAD 1. loop3: p2 < > p4 loop3: p4 size 2097152 extends beyond EOD, truncated INFO: task syz-executor.3:14255 blocked for more than 140 seconds. Not tainted 4.14.213-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28944 14255 8008 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1e6/0x350 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xda/0x490 fs/super.c:611 sys_sync+0x78/0x130 fs/sync.c:113 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e299 RSP: 002b:00007ffb7d50cc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00000000004cd53c RCX: 000000000045e299 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000119bf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffccc38d80f R14: 00007ffb7d50d9c0 R15: 000000000119bf8c INFO: task syz-executor.3:14287 blocked for more than 140 seconds. Not tainted 4.14.213-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29728 14287 8008 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x1e6/0x350 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:66 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xda/0x490 fs/super.c:611 sys_sync+0x78/0x130 fs/sync.c:113 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45e299 RSP: 002b:00007ffb7d4cac68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00000000004cd53c RCX: 000000000045e299 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000119c0d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffccc38d80f R14: 00007ffb7d4cb9c0 R15: 000000000119c0dc Showing all locks held in the system: 1 lock held by khungtaskd/1509: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 2 locks held by agetty/7700: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e3/0x1680 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.3/14255: #0: (&type->s_umount_key#95){++++}, at: [] iterate_supers+0xda/0x490 fs/super.c:611 1 lock held by syz-executor.3/14287: #0: (&type->s_umount_key#95){++++}, at: [] iterate_supers+0xda/0x490 fs/super.c:611 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1509 Comm: khungtaskd Not tainted 4.14.213-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 25 Comm: kworker/u4:2 Not tainted 4.14.213-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet task: ffff8880b5636680 task.stack: ffff8880b5640000 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:check_preemption_disabled+0x1d/0x240 lib/smp_processor_id.c:16 RSP: 0018:ffff8880b5647c00 EFLAGS: 00000297 RAX: ffff8880b5636680 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff87ccd1c0 RDI: ffffffff87ccd200 RBP: ffffffff87ccd200 R08: 0000000000000000 R09: 0000000000020012 R10: ffff8880b5636f80 R11: ffff8880b5636680 R12: 0000000000000000 R13: ffffffff87ccd1c0 R14: ffff888059dd5680 R15: ffff888059dd5718 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f05e901f018 CR3: 00000000a1cb9000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:360 [inline] rcu_is_watching+0x11/0xb0 kernel/rcu/tree.c:1130 rcu_read_unlock include/linux/rcupdate.h:681 [inline] batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:943 [inline] batadv_iv_ogm_schedule_buff+0x84d/0xf80 net/batman-adv/bat_iv_ogm.c:997 batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1041 [inline] batadv_iv_ogm_schedule net/batman-adv/bat_iv_ogm.c:1034 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x500/0x6f0 net/batman-adv/bat_iv_ogm.c:1859 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: fd ff ff 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 55 49 89 f5 41 54 55 48 89 fd 53 e8 0b 67 35 fe 65 44 8b 25 93 a8 df 7c <65> 8b 05 6c 06 e0 7c a9 ff ff ff 7f 74 18 e8 f0 66 35 fe e8 eb