NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 NOHZ: local_softirq_pending 08 INFO: task syz-executor.4:8541 blocked for more than 140 seconds. Not tainted 4.19.111-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28272 8541 8082 0x00000004 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416501 Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc RSP: 002b:00007fc0957ce9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc0957cea58 RCX: 0000000000416501 RDX: 0000000000000000 RSI: 00007fc0957cea00 RDI: 000000000000000a RBP: 000000000000000a R08: 0000000000000008 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fc0957cea40 R13: 0000000000000bb3 R14: 00000000004d7ec8 R15: 000000000076bf0c INFO: task syz-executor.4:8546 blocked for more than 140 seconds. Not tainted 4.19.111-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27344 8546 8082 0x00000004 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416501 Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc RSP: 002b:00007fc0957ad9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fc0957ada58 RCX: 0000000000416501 RDX: 0000000000000000 RSI: 00007fc0957ada00 RDI: 000000000000000a RBP: 000000000000000a R08: 0000000000000008 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fc0957ada40 R13: 0000000000000bb3 R14: 00000000004d7ec8 R15: 000000000076bfac INFO: task syz-executor.0:8544 blocked for more than 140 seconds. Not tainted 4.19.111-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27952 8544 8067 0x00000004 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416501 Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc RSP: 002b:00007fad04eef9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fad04eefa58 RCX: 0000000000416501 RDX: 0000000000000000 RSI: 00007fad04eefa00 RDI: 0000000000000008 RBP: 0000000000000008 R08: 000000000000000c R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fad04eefa40 R13: 0000000000000bb4 R14: 00000000004d7ef0 R15: 000000000076bf0c INFO: task syz-executor.0:8568 blocked for more than 140 seconds. Not tainted 4.19.111-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28896 8568 8067 0x00000004 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072 genl_lock net/netlink/genetlink.c:33 [inline] genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x416501 Code: c0 e9 29 fd ff ff 31 ff e8 6c 04 01 00 85 c0 0f 85 1a fd ff ff 31 ff e8 7d f2 01 00 85 c0 0f 85 0b fd ff ff 31 ff e8 3e 09 00 <00> 85 c0 0f 85 fc fc ff ff 31 ff e8 bf 84 00 00 85 c0 0f 85 ed fc RSP: 002b:00007fad04ead9c0 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fad04eada58 RCX: 0000000000416501 RDX: 0000000000000000 RSI: 00007fad04eada00 RDI: 0000000000000008 RBP: 0000000000000008 R08: 000000000000000c R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007fad04eada40 R13: 0000000000000bb4 R14: 00000000004d7ef0 R15: 000000000076c04c Showing all locks held in the system: 1 lock held by khungtaskd/1081: #0: 00000000080840ce (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4436 3 locks held by rs:main Q:Reg/7897: #0: 00000000e6e025d9 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1817 [inline] #0: 00000000e6e025d9 (&rq->lock){-.-.}, at: __schedule+0x1f8/0x1d80 kernel/sched/core.c:3453 #1: 00000000080840ce (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 00000000080840ce (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857 #2: 00000000080840ce (rcu_read_lock){....}, at: fast_dput fs/dcache.c:714 [inline] #2: 00000000080840ce (rcu_read_lock){....}, at: dput+0x31/0x650 fs/dcache.c:833 1 lock held by rsyslogd/7899: #0: 00000000c1545534 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 fs/file.c:767 2 locks held by getty/8022: #0: 0000000068136454 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000e05bd33e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8023: #0: 00000000a5abe349 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000008987a351 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8024: #0: 000000002e5e87fa (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 0000000061bc5168 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8025: #0: 00000000cbbdf2af (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000004b24e2b4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8026: #0: 000000007f8449e5 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 000000003eb41748 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8027: #0: 00000000a3409f80 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000cb565884 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 2 locks held by getty/8028: #0: 000000005b159e3d (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272 #1: 00000000dff3e7d5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1a50 drivers/tty/n_tty.c:2154 3 locks held by syz-executor.2/8528: 2 locks held by syz-executor.4/8541: #0: 0000000081ba7995 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.4/8546: #0: 0000000081ba7995 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.0/8544: #0: 0000000081ba7995 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 2 locks held by syz-executor.0/8568: #0: 0000000081ba7995 (cb_lock){++++}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:637 #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: 000000003903f339 (genl_mutex){+.+.}, at: genl_rcv_msg+0x12f/0x160 net/netlink/genetlink.c:625 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1081 Comm: khungtaskd Not tainted 4.19.111-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+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x962/0xe40 kernel/hung_task.c:287 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8528 Comm: syz-executor.2 Not tainted 4.19.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:write_comp_data+0x68/0x70 kernel/kcov.c:146 Code: 00 00 4e 8d 14 dd 28 00 00 00 4d 39 d0 72 1b 49 83 c1 01 4a 89 7c 10 e0 4a 89 74 10 e8 4a 89 54 10 f0 4a 89 4c d8 20 4c 89 08 0f 1f 80 00 00 00 00 48 8b 0c 24 40 0f b6 d6 40 0f b6 f7 31 ff RSP: 0018:ffff88804750edf8 EFLAGS: 00000297 RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffff86e4a527 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff888087d50540 R08: ffff888047504700 R09: ffffed1015ce4733 R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: ffff888086b16380 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88804750f128 FS: 00007f9e2768e700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000168d000 CR3: 00000000a0d5c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __rhashtable_lookup include/linux/rhashtable.h:478 [inline] rhashtable_lookup include/linux/rhashtable.h:516 [inline] rhashtable_lookup_fast include/linux/rhashtable.h:542 [inline] tipc_sk_lookup+0xa07/0xb20 net/tipc/socket.c:2727 tipc_nl_publ_dump+0x1d4/0xc90 net/tipc/socket.c:3531 __tipc_nl_compat_dumpit.isra.0+0x1f2/0x8c0 net/tipc/netlink_compat.c:207 tipc_nl_compat_publ_dump net/tipc/netlink_compat.c:1008 [inline] tipc_nl_compat_sk_dump+0x506/0x8a0 net/tipc/netlink_compat.c:1059 __tipc_nl_compat_dumpit.isra.0+0x2e8/0x8c0 net/tipc/netlink_compat.c:216 tipc_nl_compat_dumpit+0x243/0x500 net/tipc/netlink_compat.c:288 tipc_nl_compat_handle net/tipc/netlink_compat.c:1258 [inline] tipc_nl_compat_recv+0x57c/0xa70 net/tipc/netlink_compat.c:1296 genl_family_rcv_msg+0x627/0xc10 net/netlink/genetlink.c:602 genl_rcv_msg+0xbf/0x160 net/netlink/genetlink.c:627 netlink_rcv_skb+0x160/0x410 net/netlink/af_netlink.c:2455 genl_rcv+0x24/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d7/0x6a0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x80b/0xcd0 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:632 ___sys_sendmsg+0x803/0x920 net/socket.c:2115 __sys_sendmsg+0xec/0x1b0 net/socket.c:2153 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c849 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f9e2768dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9e2768e6d4 RCX: 000000000045c849 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000006 RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000009d0 R14: 00000000004cc7f2 R15: 000000000076bfac