INFO: task syz-executor.0:27733 can't die for more than 143 seconds. syz-executor.0 D27440 27733 6845 0x00004004 Call Trace: context_switch kernel/sched/core.c:3455 [inline] __schedule+0x8e1/0x1eb0 kernel/sched/core.c:4180 schedule+0xd0/0x2a0 kernel/sched/core.c:4255 bit_wait+0x12/0xa0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd5/0x110 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_for_key_construction+0x10b/0x140 security/keys/request_key.c:664 request_key_tag+0x7a/0xb0 security/keys/request_key.c:705 dns_query+0x257/0x6c3 net/dns_resolver/dns_query.c:128 ceph_dns_resolve_name net/ceph/messenger.c:1887 [inline] ceph_parse_server_name net/ceph/messenger.c:1922 [inline] ceph_parse_ips+0x77f/0x8c0 net/ceph/messenger.c:1949 ceph_parse_mon_ips+0x59/0xc0 net/ceph/ceph_common.c:411 ceph_parse_source fs/ceph/super.c:271 [inline] ceph_parse_mount_param+0x1239/0x17e0 fs/ceph/super.c:322 vfs_parse_fs_param fs/fs_context.c:117 [inline] vfs_parse_fs_param+0x203/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 do_new_mount fs/namespace.c:2905 [inline] do_mount+0x1222/0x1df0 fs/namespace.c:3237 __do_sys_mount fs/namespace.c:3447 [inline] __se_sys_mount fs/namespace.c:3424 [inline] __x64_sys_mount+0x18f/0x230 fs/namespace.c:3424 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb19 Code: Bad RIP value. RSP: 002b:00007fa36c62ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f7240 RCX: 000000000045cb19 RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000020000480 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000771 R14: 00000000004ca736 R15: 00007fa36c62f6d4 INFO: task syz-executor.0:27733 blocked for more than 143 seconds. Not tainted 5.8.0-rc2-next-20200626-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27440 27733 6845 0x00004004 Call Trace: context_switch kernel/sched/core.c:3455 [inline] __schedule+0x8e1/0x1eb0 kernel/sched/core.c:4180 schedule+0xd0/0x2a0 kernel/sched/core.c:4255 bit_wait+0x12/0xa0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x60/0x190 kernel/sched/wait_bit.c:49 out_of_line_wait_on_bit+0xd5/0x110 kernel/sched/wait_bit.c:64 wait_on_bit include/linux/wait_bit.h:76 [inline] wait_for_key_construction+0x10b/0x140 security/keys/request_key.c:664 request_key_tag+0x7a/0xb0 security/keys/request_key.c:705 dns_query+0x257/0x6c3 net/dns_resolver/dns_query.c:128 ceph_dns_resolve_name net/ceph/messenger.c:1887 [inline] ceph_parse_server_name net/ceph/messenger.c:1922 [inline] ceph_parse_ips+0x77f/0x8c0 net/ceph/messenger.c:1949 ceph_parse_mon_ips+0x59/0xc0 net/ceph/ceph_common.c:411 ceph_parse_source fs/ceph/super.c:271 [inline] ceph_parse_mount_param+0x1239/0x17e0 fs/ceph/super.c:322 vfs_parse_fs_param fs/fs_context.c:117 [inline] vfs_parse_fs_param+0x203/0x550 fs/fs_context.c:98 vfs_parse_fs_string+0xe6/0x150 fs/fs_context.c:161 do_new_mount fs/namespace.c:2905 [inline] do_mount+0x1222/0x1df0 fs/namespace.c:3237 __do_sys_mount fs/namespace.c:3447 [inline] __se_sys_mount fs/namespace.c:3424 [inline] __x64_sys_mount+0x18f/0x230 fs/namespace.c:3424 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb19 Code: Bad RIP value. RSP: 002b:00007fa36c62ec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f7240 RCX: 000000000045cb19 RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000020000480 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000771 R14: 00000000004ca736 R15: 00007fa36c62f6d4 Showing all locks held in the system: 2 locks held by kworker/u4:1/21: #0: ffff8880ae735e58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1276 [inline] #0: ffff8880ae735e58 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x22d/0x1eb0 kernel/sched/core.c:4126 #1: ffffffff89bc3180 (rcu_read_lock){....}-{1:2}, at: cpu_of kernel/sched/sched.h:1066 [inline] #1: ffffffff89bc3180 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x39/0x3e0 kernel/sched/fair.c:6012 1 lock held by khungtaskd/1151: #0: ffffffff89bc3180 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5779 1 lock held by in:imklog/6648: #0: ffff88809704e630 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:928 2 locks held by agetty/6747: #0: ffff888097cde098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc900014042e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 2 locks held by agetty/6753: #0: ffff88809b21e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc900013a42e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.5/19151: #0: ffffffff8a028c30 (key_types_sem){++++}-{3:3}, at: key_type_lookup+0x1a/0xf0 security/keys/key.c:704 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1151 Comm: khungtaskd Not tainted 5.8.0-rc2-next-20200626-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline] watchdog+0xd89/0xf30 kernel/hung_task.c:339 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 3893 Comm: kworker/1:3 Not tainted 5.8.0-rc2-next-20200626-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_power_efficient gc_worker RIP: 0010:__lock_acquire+0x35c/0x56e0 kernel/locking/lockdep.c:4328 Code: 07 48 ba 00 00 00 00 00 fc ff df 0f b6 0c 11 48 89 f2 83 c2 03 38 ca 7c 08 84 c9 0f 85 1a 12 00 00 41 83 bc 24 bc 08 00 00 01 <48> 8d 7d 24 48 89 fa 83 d8 ff 41 c1 e5 0f c1 e0 0d 41 c1 e7 10 45 RSP: 0018:ffffc900023bfa30 EFLAGS: 00000097 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000007 RSI: 0000000000000004 RDI: ffff88809a3d0b60 RBP: ffff88809a3d0b50 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000078 R11: 0000000000000001 R12: ffff88809a3d0200 R13: 0000000000000000 R14: ffffffff8aaf5928 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00044e430 CR3: 000000009f775000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 seqcount_lockdep_reader_access include/linux/seqlock.h:97 [inline] read_seqcount_begin.constprop.0+0xae/0x1f0 include/linux/seqlock.h:182 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:300 [inline] gc_worker+0x176/0xb70 net/netfilter/nf_conntrack_core.c:1385 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294