./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1308360046 <...> [ 6.426102][ T30] audit: type=1400 audit(1691141153.122:56): avc: denied { read } for pid=151 comm="dhcpcd-run-hook" name="resolv.conf" dev="tmpfs" ino=295 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 6.434769][ T30] audit: type=1400 audit(1691141153.122:57): avc: denied { open } for pid=151 comm="dhcpcd-run-hook" path="/run/dhcpcd/hook-state/resolv.conf" dev="tmpfs" ino=295 scontext=system_u:system_r:dhcpc_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 6.613718][ T30] audit: type=1400 audit(1691141153.312:58): avc: denied { use } for pid=180 comm="ssh-keygen" path="/dev/null" dev="devtmpfs" ino=4 scontext=system_u:system_r:ssh_keygen_t tcontext=system_u:system_r:kernel_t tclass=fd permissive=1 [ 6.684899][ T30] audit: type=1400 audit(1691141153.382:59): avc: denied { search } for pid=180 comm="ssh-keygen" name="/" dev="tmpfs" ino=1 scontext=system_u:system_r:ssh_keygen_t tcontext=system_u:object_r:tmpfs_t tclass=dir permissive=1 [ 13.808873][ T30] kauditd_printk_skb: 1 callbacks suppressed [ 13.808890][ T30] audit: type=1400 audit(1691141160.502:61): avc: denied { transition } for pid=223 comm="sshd" path="/bin/sh" dev="sda1" ino=89 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 13.819630][ T30] audit: type=1400 audit(1691141160.512:62): avc: denied { noatsecure } for pid=223 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 13.826847][ T30] audit: type=1400 audit(1691141160.512:63): avc: denied { write } for pid=223 comm="sh" path="pipe:[13180]" dev="pipefs" ino=13180 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 13.845369][ T30] audit: type=1400 audit(1691141160.512:64): avc: denied { rlimitinh } for pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 13.864321][ T30] audit: type=1400 audit(1691141160.512:65): avc: denied { siginh } for pid=223 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.1.60' (ED25519) to the list of known hosts. execve("./syz-executor1308360046", ["./syz-executor1308360046"], 0x7ffe860db800 /* 10 vars */) = 0 brk(NULL) = 0x555555ca7000 brk(0x555555ca7d00) = 0x555555ca7d00 arch_prctl(ARCH_SET_FS, 0x555555ca7380) = 0 set_tid_address(0x555555ca7650) = 295 set_robust_list(0x555555ca7660, 24) = 0 rseq(0x555555ca7ca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1308360046", 4096) = 28 getrandom("\x30\x42\x7f\x7d\x48\x6b\x9f\xe5", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555ca7d00 brk(0x555555cc8d00) = 0x555555cc8d00 brk(0x555555cc9000) = 0x555555cc9000 mprotect(0x7f716b431000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555555ca7650) = 296 ./strace-static-x86_64: Process 296 attached [pid 296] set_robust_list(0x555555ca7660, 24) = 0 [pid 296] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 296] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 296] setsid() = 1 [pid 296] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 296] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 296] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 296] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 296] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 296] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 296] unshare(CLONE_NEWNS) = 0 [pid 296] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 296] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 296] unshare(CLONE_NEWCGROUP) = 0 [pid 296] unshare(CLONE_NEWUTS) = 0 [pid 296] unshare(CLONE_SYSVSEM) = 0 [pid 296] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 296] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 296] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 296] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 296] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 296] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 296] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 296] getpid() = 1 [pid 296] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 24.946796][ T30] audit: type=1400 audit(1691141171.632:68): avc: denied { mount } for pid=296 comm="syz-executor130" name="/" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 24.969375][ T30] audit: type=1400 audit(1691141171.632:69): avc: denied { mounton } for pid=296 comm="syz-executor130" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1 [ 24.990916][ T30] audit: type=1400 audit(1691141171.662:70): avc: denied { mounton } for pid=296 comm="syz-executor130" path="/dev/binderfs" dev="devtmpfs" ino=362 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1 [ 25.014034][ T30] audit: type=1400 audit(1691141171.662:71): avc: denied { mount } for pid=296 comm="syz-executor130" name="/" dev="binder" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [pid 297] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xb0\x00\x00\x00\x24\x00\x0b\x0e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\x00\x00\x00\x00\x0a\x00\x01\x00\x6e\x65\x74\x65\x6d\x00\x00\x00\x80\x00\x02\x00\x00\x00\x00\x00\x01\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x10\x00\x01\x00\xc7\x09\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x0c\x00\x0b\x00\x05\x00\x00\x00"..., iov_len=176}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, MSG_CONFIRM|MSG_NOSIGNAL|MSG_ZEROCOPY [pid 296] kill(-2, SIGKILL) = 0 [pid 296] kill(2, SIGKILL) = 0 [pid 296] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 296] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 296] getdents64(3, 0x555555ca86f0 /* 2 entries */, 32768) = 48 [pid 296] getdents64(3, 0x555555ca86f0 /* 0 entries */, 32768) = 0 [pid 296] close(3) = 0 [ 124.968820][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 124.975612][ C1] (detected by 1, t=10002 jiffies, g=729, q=2206) [ 124.981916][ C1] rcu: All QSes seen, last rcu_preempt kthread activity 10000 (4294949709-4294939709), jiffies_till_next_fqs=1, root ->qsmask 0x0 [ 124.995292][ C1] rcu: rcu_preempt kthread starved for 10000 jiffies! g729 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1 [ 125.006307][ C1] rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. [ 125.016125][ C1] rcu: RCU grace-period kthread stack dump: [ 125.021844][ C1] task:rcu_preempt state:R running task stack:28328 pid: 14 ppid: 2 flags:0x00004000 [ 125.032429][ C1] Call Trace: [ 125.035553][ C1] [ 125.038336][ C1] __schedule+0xcbe/0x1580 [ 125.042589][ C1] ? release_firmware_map_entry+0x18f/0x18f [ 125.048311][ C1] ? del_timer_sync+0x1bc/0x230 [ 125.052998][ C1] ? __kasan_check_write+0x14/0x20 [ 125.057948][ C1] schedule+0x11f/0x1e0 [ 125.061942][ C1] schedule_timeout+0x18c/0x370 [ 125.066625][ C1] ? __kasan_check_write+0x14/0x20 [ 125.071572][ C1] ? _raw_spin_lock_irqsave+0xf9/0x210 [ 125.076866][ C1] ? console_conditional_schedule+0x30/0x30 [ 125.082595][ C1] ? update_process_times+0x200/0x200 [ 125.087801][ C1] ? prepare_to_swait_event+0x308/0x320 [ 125.093286][ C1] rcu_gp_fqs_loop+0x29f/0xe60 [ 125.097959][ C1] ? dump_blkd_tasks+0x7e0/0x7e0 [ 125.102742][ C1] ? rcu_gp_init+0xc20/0xc20 [ 125.107273][ C1] ? _raw_spin_unlock_irq+0x4e/0x70 [ 125.112302][ C1] ? rcu_gp_init+0x9c5/0xc20 [ 125.116733][ C1] rcu_gp_kthread+0xa4/0x350 [ 125.121162][ C1] ? _raw_spin_lock+0x1b0/0x1b0 [ 125.125958][ C1] ? rcu_barrier_callback+0x50/0x50 [ 125.131052][ C1] ? __kasan_check_read+0x11/0x20 [ 125.135912][ C1] ? __kthread_parkme+0xb2/0x200 [ 125.140833][ C1] kthread+0x421/0x510 [ 125.144792][ C1] ? rcu_barrier_callback+0x50/0x50 [ 125.149842][ C1] ? kthread_blkcg+0xd0/0xd0 [ 125.154254][ C1] ret_from_fork+0x1f/0x30 [ 125.158510][ C1] [ 125.161372][ C1] rcu: Stack dump where RCU GP kthread last ran: [ 125.167535][ C1] NMI backtrace for cpu 1 [ 125.171699][ C1] CPU: 1 PID: 297 Comm: syz-executor130 Not tainted 5.15.120-syzkaller-00229-g748fd0d9ca0f #0 [ 125.181781][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 [ 125.191883][ C1] Call Trace: [ 125.194989][ C1] [ 125.197680][ C1] dump_stack_lvl+0x151/0x1b7 [ 125.202192][ C1] ? io_uring_drop_tctx_refs+0x190/0x190 [ 125.207668][ C1] dump_stack+0x15/0x17 [ 125.211653][ C1] nmi_cpu_backtrace+0x2f7/0x300 [ 125.216431][ C1] ? nmi_trigger_cpumask_backtrace+0x270/0x270 [ 125.222443][ C1] ? panic+0x751/0x751 [ 125.226318][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 125.232227][ C1] nmi_trigger_cpumask_backtrace+0x15d/0x270 [ 125.238039][ C1] ? arch_trigger_cpumask_backtrace+0x20/0x20 [ 125.244056][ C1] arch_trigger_cpumask_backtrace+0x10/0x20 [ 125.249868][ C1] rcu_check_gp_kthread_starvation+0x1e3/0x250 [ 125.255857][ C1] print_other_cpu_stall+0x112d/0x1340 [ 125.261170][ C1] ? generic_exec_single+0x271/0x400 [ 125.266269][ C1] ? rcu_stall_kick_kthreads+0x240/0x240 [ 125.271766][ C1] ? timekeeping_update+0x392/0x460 [ 125.276772][ C1] rcu_sched_clock_irq+0x97c/0x18e0 [ 125.281896][ C1] ? rcu_boost_kthread_setaffinity+0x340/0x340 [ 125.287889][ C1] ? hrtimer_run_queues+0x15f/0x440 [ 125.293029][ C1] update_process_times+0x198/0x200 [ 125.298064][ C1] tick_sched_timer+0x188/0x240 [ 125.302747][ C1] ? tick_setup_sched_timer+0x480/0x480 [ 125.308130][ C1] __hrtimer_run_queues+0x41a/0xad0 [ 125.313165][ C1] ? hrtimer_interrupt+0xaa0/0xaa0 [ 125.318114][ C1] ? clockevents_program_event+0x22f/0x300 [ 125.323753][ C1] ? ktime_get_update_offsets_now+0x2ba/0x2d0 [ 125.329656][ C1] hrtimer_interrupt+0x40c/0xaa0 [ 125.334431][ C1] __sysvec_apic_timer_interrupt+0xfd/0x3c0 [ 125.340155][ C1] sysvec_apic_timer_interrupt+0x95/0xc0 [ 125.345711][ C1] [ 125.348488][ C1] [ 125.351266][ C1] asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 125.357079][ C1] RIP: 0010:kvm_wait+0x147/0x180 [ 125.361875][ C1] Code: 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 34 41 0f b6 45 00 44 38 f0 75 10 66 90 0f 00 2d 3b 00 f3 03 fb f4 24 ff ff ff fb e9 1e ff ff ff 44 89 e9 80 e1 07 38 c1 7c a3 4c [ 125.381383][ C1] RSP: 0018:ffffc90000a16b00 EFLAGS: 00000246 [ 125.387281][ C1] RAX: 0000000000000003 RBX: 1ffff92000142d64 RCX: ffffffff8154c8bf [ 125.395093][ C1] RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff86f3bdec [ 125.403007][ C1] RBP: ffffc90000a16bb0 R08: dffffc0000000000 R09: fffffbfff0de77be [ 125.410819][ C1] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 125.418631][ C1] R13: ffffffff86f3bdec R14: 0000000000000003 R15: 1ffff92000142d68 [ 125.426445][ C1] ? __pv_queued_spin_lock_slowpath+0x65f/0xc40 [ 125.432518][ C1] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 125.438506][ C1] ? kvm_arch_para_hints+0x30/0x30 [ 125.443540][ C1] ? __pv_queued_spin_lock_slowpath+0x65f/0xc40 [ 125.449631][ C1] __pv_queued_spin_lock_slowpath+0x6bc/0xc40 [ 125.455519][ C1] ? __pv_queued_spin_unlock_slowpath+0x310/0x310 [ 125.461764][ C1] ? __kmalloc+0x13a/0x270 [ 125.466019][ C1] ? kvmalloc_node+0x1f0/0x4d0 [ 125.470620][ C1] _raw_spin_lock_bh+0x139/0x1b0 [ 125.475403][ C1] ? _raw_spin_lock_irq+0x1b0/0x1b0 [ 125.480428][ C1] ? __kasan_check_read+0x11/0x20 [ 125.485288][ C1] get_dist_table+0x207/0x2e0 [ 125.489805][ C1] netem_change+0xa05/0x20c0 [ 125.494277][ C1] ? __x64_sys_sendmsg+0x7b/0x90 [ 125.498999][ C1] ? do_syscall_64+0x3d/0xb0 [ 125.503437][ C1] ? entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 125.509341][ C1] ? netem_destroy+0xc0/0xc0 [ 125.513759][ C1] ? hrtimer_init+0x30/0x160 [ 125.518185][ C1] netem_init+0x5b/0xb0 [ 125.522179][ C1] ? qdisc_peek_dequeued+0x230/0x230 [ 125.527315][ C1] qdisc_create+0x890/0x12e0 [ 125.531726][ C1] ? qdisc_notify+0x370/0x370 [ 125.536237][ C1] ? __nla_parse+0x43/0x60 [ 125.540491][ C1] tc_modify_qdisc+0x8b4/0x14b0 [ 125.545183][ C1] ? qdisc_offload_graft_helper+0x2a0/0x2a0 [ 125.551163][ C1] ? wait_for_completion_killable_timeout+0x10/0x10 [ 125.557588][ C1] ? ns_capable+0x89/0xe0 [ 125.561747][ C1] ? netlink_net_capable+0x125/0x160 [ 125.566876][ C1] ? qdisc_offload_graft_helper+0x2a0/0x2a0 [ 125.572605][ C1] rtnetlink_rcv_msg+0x951/0xc40 [ 125.577382][ C1] ? rtnetlink_bind+0x80/0x80 [ 125.581884][ C1] ? avc_denied+0x13f/0x1b0 [ 125.586221][ C1] ? avc_has_perm_noaudit+0x2dd/0x430 [ 125.591431][ C1] ? avc_denied+0x1b0/0x1b0 [ 125.595769][ C1] ? avc_has_perm+0x16f/0x260 [ 125.600328][ C1] ? ____kasan_kmalloc+0xed/0x110 [ 125.605143][ C1] ? avc_has_perm_noaudit+0x430/0x430 [ 125.610356][ C1] ? do_syscall_64+0x3d/0xb0 [ 125.614779][ C1] netlink_rcv_skb+0x1cf/0x410 [ 125.619376][ C1] ? rtnetlink_bind+0x80/0x80 [ 125.623893][ C1] ? netlink_ack+0xb10/0xb10 [ 125.628409][ C1] ? __netlink_lookup+0x37b/0x3a0 [ 125.633274][ C1] rtnetlink_rcv+0x1c/0x20 [ 125.637517][ C1] netlink_unicast+0x8df/0xac0 [ 125.642128][ C1] ? netlink_detachskb+0x90/0x90 [ 125.646889][ C1] ? security_netlink_send+0x7b/0xa0 [ 125.652013][ C1] netlink_sendmsg+0xa0a/0xd20 [ 125.656617][ C1] ? netlink_getsockopt+0x560/0x560 [ 125.661656][ C1] ? security_socket_sendmsg+0x82/0xb0 [ 125.666936][ C1] ? netlink_getsockopt+0x560/0x560 [ 125.671972][ C1] ____sys_sendmsg+0x59e/0x8f0 [ 125.676574][ C1] ? __sys_sendmsg_sock+0x40/0x40 [ 125.681432][ C1] ? import_iovec+0xe5/0x120 [ 125.685857][ C1] ___sys_sendmsg+0x252/0x2e0 [ 125.690371][ C1] ? __sys_sendmsg+0x260/0x260 [ 125.694970][ C1] ? finish_task_switch+0x167/0x7b0 [ 125.700017][ C1] ? __schedule+0xcc6/0x1580 [ 125.704433][ C1] ? __kasan_check_write+0x14/0x20 [ 125.709380][ C1] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 125.714329][ C1] ? __kasan_check_read+0x11/0x20 [ 125.719274][ C1] ? __fdget+0x179/0x240 [ 125.724394][ C1] __se_sys_sendmsg+0x19a/0x260 [ 125.729089][ C1] ? _raw_spin_unlock_irq+0x4e/0x70 [ 125.734116][ C1] ? __x64_sys_sendmsg+0x90/0x90 [ 125.738893][ C1] ? __kasan_check_read+0x11/0x20 [ 125.743844][ C1] __x64_sys_sendmsg+0x7b/0x90 [ 125.748459][ C1] do_syscall_64+0x3d/0xb0 [ 125.752807][ C1] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 125.758505][ C1] RIP: 0033:0x7f716b3be009 [ 125.762859][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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 b8 ff ff ff f7 d8 64 89 01 48 [ 125.782375][ C1] RSP: 002b:00007ffee5469838 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 125.790615][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f716b3be009 [ 125.798425][ C1] RDX: 0000000004004800 RSI: 0000000020000440 RDI: 0000000000000003 [ 125.806240][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000555555ca8610 [ 125.814054][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 125.821886][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 125.829678][ C1] [ 265.139929][ C1] watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz-executor130:297] [ 265.148625][ C1] Modules linked in: [ 265.152349][ C1] CPU: 1 PID: 297 Comm: syz-executor130 Not tainted 5.15.120-syzkaller-00229-g748fd0d9ca0f #0 [ 265.162422][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 [ 265.172346][ C1] RIP: 0010:__pv_queued_spin_lock_slowpath+0x5ba/0xc40 [ 265.178992][ C1] Code: 00 00 49 89 dc c6 03 00 48 8b 44 24 10 0f b6 04 10 84 c0 0f 85 48 01 00 00 48 8b 44 24 08 c6 00 01 bb 00 80 ff ff eb 06 f3 90 c3 74 5e 41 0f b6 44 15 00 84 c0 75 36 41 80 3f 00 75 ea 4c 89 [ 265.199220][ C1] RSP: 0018:ffffc90000a16bc0 EFLAGS: 00000206 [ 265.205583][ C1] RAX: 0000000000000000 RBX: 00000000ffffcce2 RCX: ffffffff8154c8bf [ 265.213453][ C1] RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffffff86f3bdec [ 265.221205][ C1] RBP: ffffc90000a16cb0 R08: dffffc0000000000 R09: fffffbfff0de77be [ 265.229017][ C1] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f7137ed4 [ 265.236832][ C1] R13: 1ffffffff0de77bd R14: 1ffff1103ee20001 R15: ffffffff86f3bdec [ 265.244642][ C1] FS: 0000555555ca7380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 265.253531][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 265.259947][ C1] CR2: 0000000000000000 CR3: 000000011d5d3000 CR4: 00000000003506a0 [ 265.267782][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 265.275567][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 265.283516][ C1] Call Trace: [ 265.286660][ C1] [ 265.289330][ C1] ? show_regs+0x58/0x60 [ 265.293412][ C1] ? watchdog_timer_fn+0x4b1/0x5f0 [ 265.298355][ C1] ? proc_watchdog_cpumask+0xd0/0xd0 [ 265.303472][ C1] ? __hrtimer_run_queues+0x41a/0xad0 [ 265.308683][ C1] ? hrtimer_interrupt+0xaa0/0xaa0 [ 265.313713][ C1] ? clockevents_program_event+0x22f/0x300 [ 265.319358][ C1] ? ktime_get_update_offsets_now+0x2ba/0x2d0 [ 265.325257][ C1] ? hrtimer_interrupt+0x40c/0xaa0 [ 265.330217][ C1] ? __sysvec_apic_timer_interrupt+0xfd/0x3c0 [ 265.336294][ C1] ? sysvec_apic_timer_interrupt+0x95/0xc0 [ 265.341932][ C1] [ 265.344710][ C1] [ 265.347489][ C1] ? asm_sysvec_apic_timer_interrupt+0x1b/0x20 [ 265.353477][ C1] ? __pv_queued_spin_lock_slowpath+0x65f/0xc40 [ 265.359650][ C1] ? __pv_queued_spin_lock_slowpath+0x5ba/0xc40 [ 265.365717][ C1] ? __pv_queued_spin_unlock_slowpath+0x310/0x310 [ 265.371960][ C1] ? __kmalloc+0x13a/0x270 [ 265.376216][ C1] ? kvmalloc_node+0x1f0/0x4d0 [ 265.381163][ C1] _raw_spin_lock_bh+0x139/0x1b0 [ 265.385938][ C1] ? _raw_spin_lock_irq+0x1b0/0x1b0 [ 265.391005][ C1] ? __kasan_check_read+0x11/0x20 [ 265.395831][ C1] get_dist_table+0x207/0x2e0 [ 265.400347][ C1] netem_change+0xa05/0x20c0 [ 265.404858][ C1] ? __x64_sys_sendmsg+0x7b/0x90 [ 265.409721][ C1] ? do_syscall_64+0x3d/0xb0 [ 265.414246][ C1] ? entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 265.420149][ C1] ? netem_destroy+0xc0/0xc0 [ 265.424691][ C1] ? hrtimer_init+0x30/0x160 [ 265.429095][ C1] netem_init+0x5b/0xb0 [ 265.433089][ C1] ? qdisc_peek_dequeued+0x230/0x230 [ 265.438207][ C1] qdisc_create+0x890/0x12e0 [ 265.442637][ C1] ? qdisc_notify+0x370/0x370 [ 265.447272][ C1] ? __nla_parse+0x43/0x60 [ 265.451523][ C1] tc_modify_qdisc+0x8b4/0x14b0 [ 265.456468][ C1] ? qdisc_offload_graft_helper+0x2a0/0x2a0 [ 265.462287][ C1] ? wait_for_completion_killable_timeout+0x10/0x10 [ 265.468705][ C1] ? ns_capable+0x89/0xe0 [ 265.472870][ C1] ? netlink_net_capable+0x125/0x160 [ 265.477999][ C1] ? qdisc_offload_graft_helper+0x2a0/0x2a0 [ 265.483728][ C1] rtnetlink_rcv_msg+0x951/0xc40 [ 265.488494][ C1] ? rtnetlink_bind+0x80/0x80 [ 265.493010][ C1] ? avc_denied+0x13f/0x1b0 [ 265.497368][ C1] ? avc_has_perm_noaudit+0x2dd/0x430 [ 265.502567][ C1] ? avc_denied+0x1b0/0x1b0 [ 265.506985][ C1] ? avc_has_perm+0x16f/0x260 [ 265.511495][ C1] ? ____kasan_kmalloc+0xed/0x110 [ 265.516356][ C1] ? avc_has_perm_noaudit+0x430/0x430 [ 265.521577][ C1] ? do_syscall_64+0x3d/0xb0 [ 265.525996][ C1] netlink_rcv_skb+0x1cf/0x410 [ 265.530693][ C1] ? rtnetlink_bind+0x80/0x80 [ 265.535200][ C1] ? netlink_ack+0xb10/0xb10 [ 265.539653][ C1] ? __netlink_lookup+0x37b/0x3a0 [ 265.544487][ C1] rtnetlink_rcv+0x1c/0x20 [ 265.548738][ C1] netlink_unicast+0x8df/0xac0 [ 265.553365][ C1] ? netlink_detachskb+0x90/0x90 [ 265.558318][ C1] ? security_netlink_send+0x7b/0xa0 [ 265.563474][ C1] netlink_sendmsg+0xa0a/0xd20 [ 265.568040][ C1] ? netlink_getsockopt+0x560/0x560 [ 265.573074][ C1] ? security_socket_sendmsg+0x82/0xb0 [ 265.578365][ C1] ? netlink_getsockopt+0x560/0x560 [ 265.583609][ C1] ____sys_sendmsg+0x59e/0x8f0 [ 265.588207][ C1] ? __sys_sendmsg_sock+0x40/0x40 [ 265.593068][ C1] ? import_iovec+0xe5/0x120 [ 265.597521][ C1] ___sys_sendmsg+0x252/0x2e0 [ 265.602008][ C1] ? __sys_sendmsg+0x260/0x260 [ 265.606603][ C1] ? finish_task_switch+0x167/0x7b0 [ 265.611639][ C1] ? __schedule+0xcc6/0x1580 [ 265.616155][ C1] ? __kasan_check_write+0x14/0x20 [ 265.621116][ C1] ? _raw_spin_lock_irq+0xa5/0x1b0 [ 265.626070][ C1] ? __kasan_check_read+0x11/0x20 [ 265.631193][ C1] ? __fdget+0x179/0x240 [ 265.635280][ C1] __se_sys_sendmsg+0x19a/0x260 [ 265.639959][ C1] ? _raw_spin_unlock_irq+0x4e/0x70 [ 265.645029][ C1] ? __x64_sys_sendmsg+0x90/0x90 [ 265.649786][ C1] ? __kasan_check_read+0x11/0x20 [ 265.654634][ C1] __x64_sys_sendmsg+0x7b/0x90 [ 265.659242][ C1] do_syscall_64+0x3d/0xb0 [ 265.663480][ C1] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 265.669293][ C1] RIP: 0033:0x7f716b3be009 [ 265.673729][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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 b8 ff ff ff f7 d8 64 89 01 48 [ 265.693172][ C1] RSP: 002b:00007ffee5469838 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 265.701606][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f716b3be009 [ 265.709499][ C1] RDX: 0000000004004800 RSI: 0000000020000440 RDI: 0000000000000003 [ 265.717682][ C1] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000555555ca8610 [ 265.725496][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 265.733302][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 265.741118][ C1]