INFO: task syz-executor188:5090 blocked for more than 143 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor188 state:D stack:22576 pid:5090 tgid:5085 ppid:5068 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f14d5142339 RSP: 002b:00007f14d5102228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000000002a RCX: 00007f14d5142339 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004 RBP: 00007f14d51cb348 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f14d51cb340 R13: 00007f14d5198064 R14: 00007ffea1d75220 R15: 00007ffea1d75308 INFO: task syz-executor188:5093 blocked for more than 143 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor188 state:D stack:22672 pid:5093 tgid:5084 ppid:5067 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f14d5142339 RSP: 002b:00007f14d5102228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000000002c RCX: 00007f14d5142339 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004 RBP: 00007f14d51cb348 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f14d51cb340 R13: 00007f14d5198064 R14: 00007ffea1d75220 R15: 00007ffea1d75308 INFO: task syz-executor188:5094 blocked for more than 144 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor188 state:D stack:22576 pid:5094 tgid:5088 ppid:5073 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f14d5142339 RSP: 002b:00007f14d5102228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000000002e RCX: 00007f14d5142339 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004 RBP: 00007f14d51cb348 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f14d51cb340 R13: 00007f14d5198064 R14: 00007ffea1d75220 R15: 00007ffea1d75308 INFO: task syz-executor188:5098 blocked for more than 144 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor188 state:D stack:27416 pid:5098 tgid:5096 ppid:5066 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f14d5143c8c RSP: 002b:00007f14d5101150 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f14d5101214 RCX: 00007f14d5143c8c RDX: 0000000000000020 RSI: 00007f14d5101200 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007f14d51011a4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f14d5101200 R13: 00007f14d5198064 R14: 00007ffea1d75220 R15: 00007ffea1d75308 INFO: task syz-executor188:5099 blocked for more than 145 seconds. Not tainted 6.8.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor188 state:D stack:26640 pid:5099 tgid:5097 ppid:5075 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f14d5143c8c RSP: 002b:00007f14d5101150 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f14d5101214 RCX: 00007f14d5143c8c RDX: 0000000000000020 RSI: 00007f14d5101200 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007f14d51011a4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 00007f14d5101200 R13: 00007f14d5198064 R14: 00007ffea1d75220 R15: 00007ffea1d75308 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 2 locks held by getty/4815: #0: ffff88802adae0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 2 locks held by syz-executor188/5090: #0: ffffffff8f3d96f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216 #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 3 locks held by syz-executor188/5091: 2 locks held by syz-executor188/5093: #0: ffffffff8f3d96f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216 #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 2 locks held by syz-executor188/5094: #0: ffffffff8f3d96f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216 #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 2 locks held by syz-executor188/5098: #0: ffffffff8f3d96f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216 #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 2 locks held by syz-executor188/5099: #0: ffffffff8f3d96f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1216 #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8f3d95a8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x121/0xe50 net/netlink/genetlink.c:1207 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2f1/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5091 Comm: syz-executor188 Not tainted 6.8.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:get_current arch/x86/include/asm/current.h:42 [inline] RIP: 0010:write_comp_data kernel/kcov.c:235 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x90 kernel/kcov.c:311 Code: 0a 20 e9 8b bf de 09 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 <65> 48 8b 0d c0 4c 70 7e 65 8b 05 c1 4c 70 7e a9 00 01 ff 00 74 10 RSP: 0018:ffffc90004406898 EFLAGS: 00000246 RAX: ffffffff8b040591 RBX: 0000000000000001 RCX: ffff888029d30000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90004406990 R08: ffffffff8b0405a6 R09: 1ffffffff2591a84 R10: dffffc0000000000 R11: fffffbfff2591a85 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88802b1e114a R15: ffff88802b1e114e FS: 00007f14d51026c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005570e4257600 CR3: 000000002df32000 CR4: 0000000000350ef0 Call Trace: __rht_ptr include/linux/rhashtable.h:362 [inline] rht_ptr_rcu include/linux/rhashtable.h:376 [inline] __rhashtable_lookup include/linux/rhashtable.h:607 [inline] rhashtable_lookup include/linux/rhashtable.h:646 [inline] tipc_sk_lookup+0x376/0x940 net/tipc/socket.c:3004 tipc_nl_publ_dump+0x2c6/0xde0 net/tipc/socket.c:3815 __tipc_nl_compat_dumpit+0x4b9/0xbf0 net/tipc/netlink_compat.c:224 tipc_nl_compat_publ_dump net/tipc/netlink_compat.c:1032 [inline] tipc_nl_compat_sk_dump+0x7b1/0x9a0 net/tipc/netlink_compat.c:1084 __tipc_nl_compat_dumpit+0x60b/0xbf0 net/tipc/netlink_compat.c:235 tipc_nl_compat_dumpit+0x4f4/0x740 net/tipc/netlink_compat.c:318 tipc_nl_compat_recv+0xdaa/0x14c0 net/tipc/netlink_compat.c:1321 genl_family_rcv_msg_doit net/netlink/genetlink.c:1113 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1193 [inline] genl_rcv_msg+0xad8/0xe50 net/netlink/genetlink.c:1208 netlink_rcv_skb+0x1e5/0x430 net/netlink/af_netlink.c:2543 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x7ec/0x980 net/netlink/af_netlink.c:1367 netlink_sendmsg+0xa3b/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x223/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f14d5142339 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 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 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f14d5102228 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007f14d5142339 RDX: 0000000000000000 RSI: 0000000020000500 RDI: 0000000000000004 RBP: 00007f14d51cb348 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f14d51cb340 R13: 00007f14d5198064 R14: 00007ffea1d75220 R15: 00007ffea1d75308 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 3.409 msecs