INFO: task syz-executor.0:13653 can't die for more than 143 seconds. syz-executor.0 D27384 13653 6819 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:00007f41805d0c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f7240 RCX: 000000000045cb19 RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000020000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000771 R14: 00000000004ca736 R15: 00007f41805d16d4 INFO: task syz-executor.0:13653 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 D27384 13653 6819 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:00007f41805d0c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f7240 RCX: 000000000045cb19 RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000020000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000771 R14: 00000000004ca736 R15: 00007f41805d16d4 INFO: task syz-executor.0:13656 can't die for more than 144 seconds. syz-executor.0 D29304 13656 13653 0x00004006 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:00007f41805d0c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f7240 RCX: 000000000045cb19 RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000020000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000771 R14: 00000000004ca736 R15: 00007f41805d16d4 INFO: task syz-executor.0:13656 blocked for more than 144 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 D29304 13656 13653 0x00004006 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:00007f41805d0c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00000000004f7240 RCX: 000000000045cb19 RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000020000000 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000771 R14: 00000000004ca736 R15: 00007f41805d16d4 Showing all locks held in the system: 7 locks held by kworker/u4:0/7: 1 lock held by khungtaskd/1152: #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/6497: #0: ffff8880a70e9430 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:928 2 locks held by agetty/6711: #0: ffff888090f61098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc90000f502e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 2 locks held by agetty/6714: #0: ffff888090492098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc90000f602e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x223/0x1a30 drivers/tty/n_tty.c:2156 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1152 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7 Comm: kworker/u4:0 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: krdsd rds_connect_worker RIP: 0010:__lock_acquire+0x9e4/0x56e0 kernel/locking/lockdep.c:4363 Code: 10 49 8b 9c 24 c8 08 00 00 45 85 d2 0f 84 a5 04 00 00 45 31 ff 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 00 <0f> 85 08 37 00 00 48 8b 14 24 48 89 5d 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc90000cdf788 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 2d77fd504c7d30c9 RCX: ffffffff8159e015 RDX: 1ffff110152b4167 RSI: 0000000000000008 RDI: ffffffff8c59ca98 RBP: ffff8880a95a0b38 R08: 0000000000000000 R09: ffffffff8c59ca9f R10: 0000000000000004 R11: 0000000000000000 R12: ffff8880a95a01c0 R13: ffff8880a95a0b5a R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c008c21800 CR3: 00000000a7016000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] inet_csk_find_open_port net/ipv4/inet_connection_sock.c:229 [inline] inet_csk_get_port+0xa6f/0x2430 net/ipv4/inet_connection_sock.c:317 __inet_bind+0x796/0xbc0 net/ipv4/af_inet.c:525 inet_bind+0xf0/0x160 net/ipv4/af_inet.c:454 rds_tcp_conn_path_connect+0x532/0x880 net/rds/tcp_connect.c:144 rds_connect_worker+0x1a5/0x2c0 net/rds/threads.c:176 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