./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2416292040 <...> [ 29.582233][ T3177] 8021q: adding VLAN 0 to HW filter on device bond0 [ 29.592544][ T3177] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller syzkaller login: [ 39.218675][ T27] kauditd_printk_skb: 37 callbacks suppressed [ 39.218691][ T27] audit: type=1400 audit(1652740631.058:73): avc: denied { transition } for pid=3385 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 39.246829][ T27] audit: type=1400 audit(1652740631.068:74): avc: denied { write } for pid=3385 comm="sh" path="pipe:[27977]" dev="pipefs" ino=27977 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 Warning: Permanently added '10.128.1.112' (ECDSA) to the list of known hosts. execve("./syz-executor2416292040", ["./syz-executor2416292040"], 0x7ffd587c2b10 /* 10 vars */) = 0 brk(NULL) = 0x555556b6b000 brk(0x555556b6bc40) = 0x555556b6bc40 arch_prctl(ARCH_SET_FS, 0x555556b6b300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2416292040", 4096) = 28 brk(0x555556b8cc40) = 0x555556b8cc40 brk(0x555556b8d000) = 0x555556b8d000 mprotect(0x7fd2b9b99000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556b6b5d0) = 3599 ./strace-static-x86_64: Process 3599 attached [pid 3599] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3599] setpgid(0, 0) = 0 [pid 3599] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 3599] write(3, "1000", 4) = 4 [pid 3599] close(3) = 0 [pid 3599] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3 [pid 3599] socketpair(AF_UNIX, SOCK_STREAM, 0, [4, 5]) = 0 [ 50.281006][ T27] audit: type=1400 audit(1652740642.118:75): avc: denied { execmem } for pid=3598 comm="syz-executor241" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 50.300825][ T27] audit: type=1400 audit(1652740642.118:76): avc: denied { read } for pid=3599 comm="syz-executor241" name="nbd0" dev="devtmpfs" ino=660 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 3599] ioctl(3, NBD_SET_SOCK, 4) = 0 [pid 3599] creat("./file0", 000) = 6 [ 50.324549][ T27] audit: type=1400 audit(1652740642.118:77): avc: denied { open } for pid=3599 comm="syz-executor241" path="/dev/nbd0" dev="devtmpfs" ino=660 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 50.348766][ T27] audit: type=1400 audit(1652740642.138:78): avc: denied { ioctl } for pid=3599 comm="syz-executor241" path="/dev/nbd0" dev="devtmpfs" ino=660 ioctlcmd=0xab00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 50.378023][ T27] audit: type=1400 audit(1652740642.218:79): avc: denied { mounton } for pid=3599 comm="syz-executor241" path="/root/file0" dev="sda1" ino=1138 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=file permissive=1 [pid 3599] mount("/dev/nbd0", "./file0", "xfs", MS_NOSUID|MS_SILENT, NULL [pid 3598] kill(-3599, SIGKILL) = 0 [pid 3598] kill(3599, SIGKILL) = 0 [pid 3598] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 3598] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 3598] getdents64(3, 0x555556b6c620 /* 2 entries */, 32768) = 48 [pid 3598] getdents64(3, 0x555556b6c620 /* 0 entries */, 32768) = 0 [pid 3598] close(3) = 0 [ 76.128819][ T144] cfg80211: failed to load regulatory.db [ 80.607115][ T51] block nbd0: Possible stuck request ffff88801c410000: control (read@0,512B). Runtime 30 seconds [ 286.047150][ T28] INFO: task syz-executor241:3599 blocked for more than 143 seconds. [ 286.055302][ T28] Not tainted 5.18.0-rc7-syzkaller #0 [ 286.061329][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.070150][ T28] task:syz-executor241 state:D stack:25592 pid: 3599 ppid: 3598 flags:0x00004004 [ 286.079656][ T28] Call Trace: [ 286.082937][ T28] [ 286.085854][ T28] __schedule+0xa9a/0x4cc0 [ 286.090471][ T28] ? io_schedule_timeout+0x140/0x140 [ 286.095773][ T28] schedule+0xd2/0x1f0 [ 286.099993][ T28] schedule_timeout+0x1db/0x2a0 [ 286.104863][ T28] ? usleep_range_state+0x1b0/0x1b0 [ 286.110112][ T28] ? __wait_for_common+0x36a/0x530 [ 286.115229][ T28] ? mark_held_locks+0x9f/0xe0 [ 286.120075][ T28] ? rwlock_bug.part.0+0x90/0x90 [ 286.125023][ T28] ? _raw_spin_unlock_irq+0x1f/0x40 [ 286.130265][ T28] __wait_for_common+0x373/0x530 [ 286.135209][ T28] ? usleep_range_state+0x1b0/0x1b0 [ 286.140444][ T28] ? out_of_line_wait_on_bit_timeout+0x170/0x170 [ 286.146780][ T28] ? __xfs_buf_submit+0x4b5/0x840 [ 286.151895][ T28] xfs_buf_iowait+0xd5/0x5f0 [ 286.156512][ T28] __xfs_buf_submit+0x4b5/0x840 [ 286.161401][ T28] xfs_buf_read_uncached+0x20d/0x380 [ 286.166703][ T28] ? xfs_buf_readahead_map+0xc0/0xc0 [ 286.172047][ T28] ? mark_held_locks+0x9f/0xe0 [ 286.176822][ T28] xfs_readsb+0x318/0x630 [ 286.181233][ T28] ? xfs_sb_validate_fsb_count+0x140/0x140 [ 286.187102][ T28] xfs_fs_fill_super+0x72e/0x1d90 [ 286.192197][ T28] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 286.198505][ T28] get_tree_bdev+0x440/0x760 [ 286.203131][ T28] ? xfs_fs_destroy_inode+0x680/0x680 [ 286.208665][ T28] vfs_get_tree+0x89/0x2f0 [ 286.213087][ T28] path_mount+0x1320/0x1fa0 [ 286.217663][ T28] ? kmem_cache_free.part.0+0x11e/0x240 [ 286.223265][ T28] ? putname+0xfe/0x140 [ 286.227450][ T28] ? finish_automount+0xaf0/0xaf0 [ 286.232481][ T28] ? putname+0xfe/0x140 [ 286.236622][ T28] __x64_sys_mount+0x27f/0x300 [ 286.241421][ T28] ? copy_mnt_ns+0xae0/0xae0 [ 286.246013][ T28] ? lockdep_hardirqs_on+0x79/0x100 [ 286.251263][ T28] ? _raw_spin_unlock_irq+0x2a/0x40 [ 286.256470][ T28] ? ptrace_notify+0xfa/0x140 [ 286.261222][ T28] do_syscall_64+0x35/0xb0 [ 286.265642][ T28] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 286.271565][ T28] RIP: 0033:0x7fd2b9b2c3c9 [ 286.275978][ T28] RSP: 002b:00007ffc252ce848 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 286.284416][ T28] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fd2b9b2c3c9 [ 286.292412][ T28] RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 [ 286.300420][ T28] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffc252ce9e8 [ 286.308415][ T28] R10: 0000000000008002 R11: 0000000000000246 R12: 00007fd2b9aeb6e0 [ 286.316371][ T28] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 [ 286.324386][ T28] [ 286.327462][ T28] [ 286.327462][ T28] Showing all locks held in the system: [ 286.335177][ T28] 1 lock held by khungtaskd/28: [ 286.340078][ T28] #0: ffffffff8bd7f5e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 286.350053][ T28] 2 locks held by getty/3278: [ 286.354707][ T28] #0: ffff88807faec098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 [ 286.364576][ T28] #1: ffffc900013e82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 [ 286.374716][ T28] 1 lock held by syz-executor241/3599: [ 286.380197][ T28] #0: ffff88807e2560e0 (&type->s_umount_key#59/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xa80 [ 286.390436][ T28] [ 286.392746][ T28] ============================================= [ 286.392746][ T28] [ 286.401168][ T28] NMI backtrace for cpu 0 [ 286.405484][ T28] CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc7-syzkaller #0 [ 286.413614][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 286.423652][ T28] Call Trace: [ 286.426916][ T28] [ 286.429839][ T28] dump_stack_lvl+0xcd/0x134 [ 286.434478][ T28] nmi_cpu_backtrace.cold+0x47/0x144 [ 286.439746][ T28] ? lapic_can_unplug_cpu+0x80/0x80 [ 286.444957][ T28] nmi_trigger_cpumask_backtrace+0x1e6/0x230 [ 286.450946][ T28] watchdog+0xc1d/0xf50 [ 286.455083][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.461047][ T28] kthread+0x2e9/0x3a0 [ 286.465186][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.470817][ T28] ret_from_fork+0x1f/0x30 [ 286.475246][ T28] [ 286.478372][ T28] Sending NMI from CPU 0 to CPUs 1: [ 286.483587][ C1] NMI backtrace for cpu 1 [ 286.483597][ C1] CPU: 1 PID: 1227 Comm: kworker/u4:5 Not tainted 5.18.0-rc7-syzkaller #0 [ 286.483618][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 286.483631][ C1] Workqueue: events_unbound toggle_allocation_gate [ 286.483656][ C1] RIP: 0010:lock_is_held_type+0x93/0x140 [ 286.483681][ C1] Code: 00 00 4d 8d ac 24 60 0a 00 00 65 ff 05 fe 44 95 76 85 c0 7f 12 e9 8a 00 00 00 83 c3 01 41 3b 9c 24 58 0a 00 00 7d 7d 48 63 c3 <48> 89 ee 48 8d 04 80 4d 8d 7c c5 00 4c 89 ff e8 99 fe ff ff 85 c0 [ 286.483699][ C1] RSP: 0018:ffffc9000524f8c8 EFLAGS: 00000093 [ 286.483714][ C1] RAX: 0000000000000002 RBX: 0000000000000002 RCX: 0000000000000001 [ 286.483726][ C1] RDX: 0000000000000000 RSI: ffffffff8bd7f520 RDI: ffff88801e9cccc8 [ 286.483739][ C1] RBP: ffffffff8bd7f520 R08: 0000000000000000 R09: ffffffff8db8e757 [ 286.483752][ C1] R10: fffffbfff1b71cea R11: 0000000000000000 R12: ffff88801e9cc240 [ 286.483765][ C1] R13: ffff88801e9ccca0 R14: 00000000ffffffff R15: ffff88801e9cccc8 [ 286.483778][ C1] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 286.483795][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 286.483808][ C1] CR2: 000055a4f2ba8680 CR3: 000000000ba8e000 CR4: 00000000003506e0 [ 286.483821][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 286.483832][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 286.483844][ C1] Call Trace: [ 286.483849][ C1] [ 286.483855][ C1] rcu_read_lock_sched_held+0x3a/0x70 [ 286.483910][ C1] lock_acquire+0x442/0x510 [ 286.483932][ C1] ? lock_release+0x720/0x720 [ 286.483954][ C1] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 286.483973][ C1] ? smp_call_function_many_cond+0x4d1/0x1110 [ 286.484016][ C1] __mutex_lock+0x12f/0x12f0 [ 286.484035][ C1] ? arch_jump_label_transform_queue+0x58/0x100 [ 286.484081][ C1] ? arch_jump_label_transform_queue+0x58/0x100 [ 286.484105][ C1] ? mutex_lock_io_nested+0x1150/0x1150 [ 286.484125][ C1] ? __mutex_lock+0x21a/0x12f0 [ 286.484144][ C1] ? static_key_disable_cpuslocked+0x108/0x1b0 [ 286.484183][ C1] arch_jump_label_transform_queue+0x58/0x100 [ 286.484207][ C1] __jump_label_update+0x12e/0x400 [ 286.484233][ C1] jump_label_update+0x32f/0x410 [ 286.484254][ C1] static_key_disable_cpuslocked+0x152/0x1b0 [ 286.484276][ C1] static_key_disable+0x16/0x20 [ 286.484296][ C1] toggle_allocation_gate+0x183/0x390 [ 286.484318][ C1] ? lock_release+0x720/0x720 [ 286.484339][ C1] ? wake_up_kfence_timer+0x20/0x20 [ 286.484361][ C1] ? lockdep_hardirqs_on+0x79/0x100 [ 286.484381][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 286.484406][ C1] process_one_work+0x996/0x1610 [ 286.484427][ C1] ? pwq_dec_nr_in_flight+0x2a0/0x2a0 [ 286.484448][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 286.484471][ C1] ? _raw_spin_lock_irq+0x41/0x50 [ 286.484494][ C1] worker_thread+0x665/0x1080 [ 286.484513][ C1] ? __kthread_parkme+0x15f/0x220 [ 286.484537][ C1] ? process_one_work+0x1610/0x1610 [ 286.484556][ C1] kthread+0x2e9/0x3a0 [ 286.484579][ C1] ? kthread_complete_and_exit+0x40/0x40 [ 286.484604][ C1] ret_from_fork+0x1f/0x30 [ 286.484628][ C1] [ 286.484635][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.047 msecs [ 286.487037][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 286.487049][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc7-syzkaller #0 [ 286.487070][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 286.487081][ T28] Call Trace: [ 286.487087][ T28] [ 286.487094][ T28] dump_stack_lvl+0xcd/0x134 [ 286.487124][ T28] panic+0x2d7/0x636 [ 286.487164][ T28] ? panic_print_sys_info.part.0+0x10b/0x10b [ 286.487192][ T28] ? lapic_can_unplug_cpu+0x80/0x80 [ 286.487214][ T28] ? preempt_schedule_thunk+0x16/0x18 [ 286.487244][ T28] ? nmi_trigger_cpumask_backtrace+0x1c9/0x230 [ 286.487270][ T28] ? watchdog.cold+0x130/0x158 [ 286.487305][ T28] watchdog.cold+0x141/0x158 [ 286.487328][ T28] ? proc_dohung_task_timeout_secs+0x80/0x80 [ 286.487350][ T28] kthread+0x2e9/0x3a0 [ 286.487374][ T28] ? kthread_complete_and_exit+0x40/0x40 [ 286.487401][ T28] ret_from_fork+0x1f/0x30 [ 286.487425][ T28] [ 286.490167][ T28] Kernel Offset: disabled [ 286.903622][ T28] Rebooting in 86400 seconds..