INFO: task dhcpcd:4737 blocked for more than 143 seconds. Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:25808 pid:4737 tgid:4737 ppid:1 flags:0x00000002 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xee2/0x59a0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe7/0x270 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_op_lock net/netlink/genetlink.c:55 [inline] genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f6dc7988a4b RSP: 002b:00007fff8b45e818 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000056011541494f RCX: 00007f6dc7988a4b RDX: 0000000000000000 RSI: 00007fff8b45e860 RDI: 0000000000000010 RBP: 00007fff8b472d28 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fff8b472f70 R11: 0000000000000246 R12: 0000000000000010 R13: 00007fff8b4628c0 R14: 0000000000000000 R15: 0000560115d3d1a8 INFO: task syz-executor.2:32755 blocked for more than 143 seconds. Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28144 pid:32755 tgid:32752 ppid:5106 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xee2/0x59a0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe7/0x270 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_op_lock net/netlink/genetlink.c:55 [inline] genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f92ce87e7dc RSP: 002b:00007f92cf66bf60 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f92cf66c050 RCX: 00007f92ce87e7dc RDX: 0000000000000020 RSI: 00007f92cf66c0a0 RDI: 0000000000000005 RBP: 0000000000000000 R08: 00007f92cf66bfb4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f92cf66c008 R14: 00007f92cf66c0a0 R15: 0000000000000000 INFO: task syz-executor.2:32759 blocked for more than 144 seconds. Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27968 pid:32759 tgid:32752 ppid:5106 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xee2/0x59a0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe7/0x270 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_op_lock net/netlink/genetlink.c:55 [inline] genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f92ce87e7dc RSP: 002b:00007f92cf64af60 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f92cf64b050 RCX: 00007f92ce87e7dc RDX: 0000000000000020 RSI: 00007f92cf64b0a0 RDI: 0000000000000007 RBP: 0000000000000000 R08: 00007f92cf64afb4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f92cf64b008 R14: 00007f92cf64b0a0 R15: 0000000000000000 INFO: task syz-executor.1:32764 blocked for more than 145 seconds. Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28480 pid:32764 tgid:32757 ppid:5112 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xee2/0x59a0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe7/0x270 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_op_lock net/netlink/genetlink.c:55 [inline] genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f2c2ac7e7dc RSP: 002b:00007f2c2b9f4f60 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f2c2b9f5050 RCX: 00007f2c2ac7e7dc RDX: 0000000000000020 RSI: 00007f2c2b9f50a0 RDI: 0000000000000007 RBP: 0000000000000000 R08: 00007f2c2b9f4fb4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f2c2b9f5008 R14: 00007f2c2b9f50a0 R15: 0000000000000000 INFO: task syz-executor.1:300 blocked for more than 145 seconds. Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27120 pid:300 tgid:32757 ppid:5112 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0xee2/0x59a0 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0xe7/0x270 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x969/0x1340 kernel/locking/mutex.c:747 genl_lock net/netlink/genetlink.c:33 [inline] genl_op_lock net/netlink/genetlink.c:58 [inline] genl_op_lock net/netlink/genetlink.c:55 [inline] genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2545 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1076 netlink_unicast_kernel net/netlink/af_netlink.c:1342 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1368 netlink_sendmsg+0x93c/0xe40 net/netlink/af_netlink.c:1910 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f2c2ac7e7dc RSP: 002b:00007f2c2b9d3f60 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f2c2b9d4050 RCX: 00007f2c2ac7e7dc RDX: 0000000000000020 RSI: 00007f2c2b9d40a0 RDI: 0000000000000008 RBP: 0000000000000000 R08: 00007f2c2b9d3fb4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f2c2b9d4008 R14: 00007f2c2b9d40a0 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #0: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline] #0: ffffffff8cfacfe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613 2 locks held by dhcpcd/4737: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by getty/4828: #0: ffff888025fd30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201 2 locks held by kworker/u4:29/19998: 2 locks held by syz-executor.4/32724: 2 locks held by syz-executor.2/32755: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.2/32759: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.1/32764: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.1/300: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.3/306: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.4/349: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.2/358: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.1/361: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.4/380: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.1/388: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 2 locks held by syz-executor.2/392: #0: ffffffff8eb53490 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1075 #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:58 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_op_lock net/netlink/genetlink.c:55 [inline] #1: ffffffff8eb53548 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x57c/0x800 net/netlink/genetlink.c:1066 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4512 Comm: klogd Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline] RIP: 0010:write_comp_data+0x12/0x80 kernel/kcov.c:236 Code: 04 25 c0 bc 03 00 48 8b 80 f0 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 49 89 d2 49 89 f8 49 89 f1 65 48 8b 14 25 c0 bc 03 00 <65> 8b 05 ef 21 7b 7e a9 00 01 ff 00 74 0f f6 c4 01 74 59 8b 82 fc RSP: 0018:ffffc9000317f4a0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc9000317f528 RCX: ffffffff813a87ab RDX: ffff88807d275940 RSI: 0000000000000001 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000004 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001 FS: 00007fdbac715380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000562aaf3c0ef0 CR3: 0000000027895000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_next_frame+0x117b/0x2390 arch/x86/kernel/unwind_orc.c:664 arch_stack_walk+0xfa/0x170 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x96/0xd0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook mm/slab.h:763 [inline] slab_alloc_node mm/slub.c:3478 [inline] kmem_cache_alloc_node+0x180/0x3c0 mm/slub.c:3523 __alloc_skb+0x287/0x330 net/core/skbuff.c:641 alloc_skb include/linux/skbuff.h:1286 [inline] alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6331 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2780 unix_dgram_sendmsg+0x464/0x1ca0 net/unix/af_unix.c:1976 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 __sys_sendto+0x255/0x340 net/socket.c:2190 __do_sys_sendto net/socket.c:2202 [inline] __se_sys_sendto net/socket.c:2198 [inline] __x64_sys_sendto+0xe0/0x1b0 net/socket.c:2198 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fdbac8779b5 Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffc27fae868 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fdbac8779b5 RDX: 0000000000000053 RSI: 0000555f0b0eee40 RDI: 0000000000000003 RBP: 0000555f0b0e7910 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013 R13: 00007fdbaca05212 R14: 00007ffc27fae968 R15: 0000000000000000