[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.579623] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.257429] random: sshd: uninitialized urandom read (32 bytes read) [ 24.653224] random: sshd: uninitialized urandom read (32 bytes read) [ 25.419684] random: sshd: uninitialized urandom read (32 bytes read) [ 520.710949] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. [ 526.120583] random: sshd: uninitialized urandom read (32 bytes read) [ 526.245922] IPVS: ftp: loaded support on port[0] = 21 [ 526.245954] IPVS: ftp: loaded support on port[0] = 21 [ 526.252973] IPVS: ftp: loaded support on port[0] = 21 [ 526.259437] IPVS: ftp: loaded support on port[0] = 21 [ 526.265363] IPVS: ftp: loaded support on port[0] = 21 [ 526.269579] IPVS: ftp: loaded support on port[0] = 21 [ 526.273196] IPVS: ftp: loaded support on port[0] = 21 [ 526.278857] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 526.489212] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.495558] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.500960] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.506620] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.512266] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.517672] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.522912] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.529241] EXT4-fs (sda1): re-mounted. Opts: (null) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 526.535518] EXT4-fs (sda1): re-mounted. Opts: (null) [ 526.550694] EXT4-fs (sda1): re-mounted. Opts: (null) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 531.493351] EXT4-fs: 1415 callbacks suppressed [ 531.493361] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.505872] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.517686] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.523083] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.529139] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.534641] EXT4-fs (sda1): re-mounted. Opts: (null) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 531.543246] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.548681] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.556552] EXT4-fs (sda1): re-mounted. Opts: (null) [ 531.562007] EXT4-fs (sda1): re-mounted. Opts: (null) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 556.041029] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor223:4527] [ 556.048959] Modules linked in: [ 556.052153] irq event stamp: 12319252 [ 556.056110] hardirqs last enabled at (12319251): [] d_walk+0x80f/0xc80 [ 556.064502] hardirqs last disabled at (12319252): [] interrupt_entry+0xb5/0xf0 [ 556.073432] softirqs last enabled at (6473308): [] __do_softirq+0x778/0xaf5 [ 556.082353] softirqs last disabled at (6473243): [] irq_exit+0x1d1/0x200 [ 556.090794] CPU: 0 PID: 4527 Comm: syz-executor223 Not tainted 4.17.0-rc4+ #14 [ 556.099024] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 556.108533] RIP: 0010:do_raw_spin_lock+0x62/0x200 [ 556.113400] RSP: 0018:ffff8801ad2479a0 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 [ 556.121115] RAX: dffffc0000000000 RBX: ffff8801a816e640 RCX: 0000000000000000 [ 556.128385] RDX: 1ffff1003502dcca RSI: ffff8801ac096b38 RDI: ffff8801a816e644 [ 556.135651] RBP: ffff8801ad2479c8 R08: 0000000000004394 R09: 0000000000000004 [ 556.142915] R10: ffff8801ac096bd8 R11: ffff8801ac096300 R12: ffff8801a816e5c0 [ 556.150198] R13: ffff8801a816e650 R14: ffff8801a816e640 R15: ffff8801ad247b50 [ 556.157726] FS: 00000000023ab880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 556.165949] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 556.171827] CR2: 00000000004a39d0 CR3: 00000001ac6fb000 CR4: 00000000001406f0 [ 556.179098] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 556.186365] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 556.193628] Call Trace: [ 556.196231] _raw_spin_lock_nested+0x30/0x40 [ 556.200638] ? d_walk+0x3ad/0xc80 [ 556.204090] d_walk+0x3ad/0xc80 [ 556.207375] ? d_shrink_del+0x3b0/0x3b0 [ 556.211362] ? dget_parent+0x680/0x680 [ 556.215259] ? shrink_dentry_list+0x5a8/0x7c0 [ 556.219769] ? is_subdir+0x480/0x480 [ 556.223484] ? d_walk+0x7bd/0xc80 [ 556.226945] shrink_dcache_parent+0x179/0x230 [ 556.231443] ? path_has_submounts+0x1a0/0x1a0 [ 556.235943] ? down_write+0x87/0x120 [ 556.239703] ? vfs_rmdir+0xe0/0x470 [ 556.243332] ? down_read+0x1b0/0x1b0 [ 556.247101] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 556.252708] ? security_inode_rmdir+0xf4/0x130 [ 556.257297] vfs_rmdir+0x202/0x470 [ 556.260842] do_rmdir+0x523/0x610 [ 556.264308] ? __ia32_sys_mkdir+0x80/0x80 [ 556.268515] ? exit_to_usermode_loop+0x87/0x310 [ 556.273191] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 556.278738] ? exit_to_usermode_loop+0x1ef/0x310 [ 556.283497] ? do_syscall_64+0x92/0x800 [ 556.287504] __x64_sys_rmdir+0x36/0x40 [ 556.291394] do_syscall_64+0x1b1/0x800 [ 556.295277] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 556.300145] ? syscall_return_slowpath+0x5c0/0x5c0 [ 556.305180] ? syscall_return_slowpath+0x30f/0x5c0 [ 556.310124] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 556.315507] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 556.320358] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 556.325544] RIP: 0033:0x441aa7 [ 556.328726] RSP: 002b:00007ffed4dd3ce8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 556.336434] RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000441aa7 [ 556.343696] RDX: 0000000000000000 RSI: 00000000006cd858 RDI: 00007ffed4dd4dd0 [ 556.350961] RBP: 00007ffed4dd4dd0 R08: 0000000000000000 R09: 0000000000000001 [ 556.358245] R10: 000000000000000a R11: 0000000000000207 R12: 00000000023ac8a0 [ 556.365509] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 556.372787] Code: 08 84 d2 0f 85 7b 01 00 00 81 7b 04 ad 4e ad de 0f 85 f2 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 6b 10 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 68 01 00 00 65 48 8b 04 25 c0 ed 01 00 48 39 [ 556.392200] Sending NMI from CPU 0 to CPUs 1: [ 556.396698] NMI backtrace for cpu 1 [ 556.396709] CPU: 1 PID: 4524 Comm: syz-executor223 Not tainted 4.17.0-rc4+ #14 [ 556.396713] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 556.396812] RIP: 0010:check_memory_region+0x117/0x1b0 [ 556.396817] RSP: 0018:ffff8801ac7474e8 EFLAGS: 00000046 [ 556.396824] RAX: fffffbfff1446fec RBX: 1ffffffff1446feb RCX: ffffffff815c9ec1 [ 556.396829] RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8a237f58 [ 556.396834] RBP: ffff8801ac747500 R08: fffffbfff1446fec R09: fffffbfff1446feb [ 556.396839] R10: fffffbfff1446feb R11: ffffffff8a237f5b R12: fffffbfff1446fec [ 556.396843] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801a81c5618 [ 556.396850] FS: 00000000023ab880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 556.396855] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 556.396860] CR2: 00000000023bc918 CR3: 00000001d8f40000 CR4: 00000000001406e0 [ 556.396867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 556.396872] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 556.396874] Call Trace: [ 556.396886] kasan_check_write+0x14/0x20 [ 556.396897] __lock_acquire+0x291/0x5140 [ 556.396904] ? __lock_acquire+0x7f5/0x5140 [ 556.396911] ? __lock_acquire+0x7f5/0x5140 [ 556.396918] ? __lock_acquire+0x7f5/0x5140 [ 556.396925] ? __lock_acquire+0x7f5/0x5140 [ 556.396935] ? debug_check_no_locks_freed+0x310/0x310 [ 556.396943] ? debug_check_no_locks_freed+0x310/0x310 [ 556.396951] ? debug_check_no_locks_freed+0x310/0x310 [ 556.396959] ? print_usage_bug+0xc0/0xc0 [ 556.396966] ? print_usage_bug+0xc0/0xc0 [ 556.396973] ? __lock_acquire+0x7f5/0x5140 [ 556.396980] ? print_usage_bug+0xc0/0xc0 [ 556.396988] ? print_usage_bug+0xc0/0xc0 [ 556.396995] ? print_usage_bug+0xc0/0xc0 [ 556.397006] ? print_usage_bug+0xc0/0xc0 [ 556.397013] ? print_usage_bug+0xc0/0xc0 [ 556.397019] ? print_usage_bug+0xc0/0xc0 [ 556.397027] ? mark_held_locks+0xc9/0x160 [ 556.397035] ? mark_held_locks+0xc9/0x160 [ 556.397043] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 556.397050] ? graph_lock+0x170/0x170 [ 556.397057] ? graph_lock+0x170/0x170 [ 556.397065] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 556.397075] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 556.397084] ? print_usage_bug+0xc0/0xc0 [ 556.397092] lock_acquire+0x1dc/0x520 [ 556.397101] ? d_walk+0x261/0xc80 [ 556.397109] ? lock_release+0xa10/0xa10 [ 556.397116] ? lock_release+0xa10/0xa10 [ 556.397124] ? kasan_check_read+0x11/0x20 [ 556.397132] ? mark_held_locks+0xc9/0x160 [ 556.397162] ? rcu_bh_force_quiescent_state+0x20/0x20 [ 556.397169] ? d_walk+0x80f/0xc80 [ 556.397180] _raw_spin_lock+0x2a/0x40 [ 556.397187] ? d_walk+0x261/0xc80 [ 556.397194] d_walk+0x261/0xc80 [ 556.397203] ? d_shrink_del+0x3b0/0x3b0 [ 556.397211] ? dget_parent+0x680/0x680 [ 556.397219] ? shrink_dentry_list+0x5a8/0x7c0 [ 556.397227] ? retint_kernel+0x10/0x10 [ 556.397235] ? is_subdir+0x480/0x480 [ 556.397243] ? shrink_dcache_parent+0x199/0x230 [ 556.397254] ? __sanitizer_cov_trace_pc+0x1a/0x50 [ 556.397263] shrink_dcache_parent+0x179/0x230 [ 556.397271] ? path_has_submounts+0x1a0/0x1a0 [ 556.397279] ? down_write+0x87/0x120 [ 556.397288] ? vfs_rmdir+0xe0/0x470 [ 556.397295] ? down_read+0x1b0/0x1b0 [ 556.397305] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 556.397315] ? security_inode_rmdir+0xf4/0x130 [ 556.397324] vfs_rmdir+0x202/0x470 [ 556.397332] do_rmdir+0x523/0x610 [ 556.397342] ? __ia32_sys_mkdir+0x80/0x80 [ 556.397350] ? exit_to_usermode_loop+0x87/0x310 [ 556.397360] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 556.397369] ? exit_to_usermode_loop+0x1ef/0x310 [ 556.397378] ? do_syscall_64+0x92/0x800 [ 556.397387] __x64_sys_rmdir+0x36/0x40 [ 556.397395] do_syscall_64+0x1b1/0x800 [ 556.397403] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 556.397412] ? syscall_return_slowpath+0x5c0/0x5c0 [ 556.397421] ? syscall_return_slowpath+0x30f/0x5c0 [ 556.397430] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 556.397439] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 556.397449] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 556.397455] RIP: 0033:0x441aa7 [ 556.397459] RSP: 002b:00007ffed4dd3ce8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 556.397467] RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000441aa7 [ 556.397471] RDX: 0000000000000000 RSI: 00000000006cd858 RDI: 00007ffed4dd4dd0 [ 556.397476] RBP: 00007ffed4dd4dd0 R08: 0000000000000000 R09: 0000000000000001 [ 556.397480] R10: 000000000000000a R11: 0000000000000207 R12: 00000000023ac8a0 [ 556.397484] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 556.397488] Code: 0d 00 4d 85 c0 75 3e 4d 89 e0 49 29 c0 e9 6c ff ff ff 4d 85 c0 74 ba 48 b8 01 00 00 00 00 fc ff df 4d 01 c8 48 01 d8 41 80 39 00 <74> 08 e9 8c 00 00 00 48 89 d8 4c 39 c0 74 97 80 38 00 48 8d 58 [ 556.397706] Kernel panic - not syncing: softlockup: hung tasks [ 556.857700] CPU: 0 PID: 4527 Comm: syz-executor223 Tainted: G L 4.17.0-rc4+ #14 [ 556.866444] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 556.875792] Call Trace: [ 556.878367] [ 556.880595] dump_stack+0x1b9/0x294 [ 556.884227] ? dump_stack_print_info.cold.2+0x52/0x52 [ 556.889450] ? printk_safe_log_store+0x260/0x260 [ 556.894219] panic+0x22f/0x4de [ 556.897409] ? add_taint.cold.5+0x16/0x16 [ 556.901556] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 556.907127] ? watchdog_timer_fn.cold.5+0xe2/0x126 [ 556.912064] ? watchdog_timer_fn.cold.5+0xd9/0x126 [ 556.917095] watchdog_timer_fn.cold.5+0xf3/0x126 [ 556.922087] __hrtimer_run_queues+0x3e3/0x10a0 [ 556.926680] ? watchdog+0x30/0x30 [ 556.930233] ? hrtimer_start_range_ns+0xd10/0xd10 [ 556.935121] ? pvclock_read_flags+0x160/0x160 [ 556.939619] ? kvm_clock_read+0x25/0x30 [ 556.943590] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 556.948612] ? kvm_clock_read+0x25/0x30 [ 556.952582] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 556.957617] ? ktime_get_update_offsets_now+0x3d3/0x5c0 [ 556.962985] ? do_timer+0x50/0x50 [ 556.966438] ? rcu_nmi_exit+0xd7/0x2b0 [ 556.970332] ? do_raw_spin_lock+0xc1/0x200 [ 556.974571] hrtimer_interrupt+0x2f3/0x750 [ 556.978815] smp_apic_timer_interrupt+0x15d/0x710 [ 556.983653] ? smp_call_function_single_interrupt+0x650/0x650 [ 556.989536] ? _raw_spin_lock+0x32/0x40 [ 556.994237] ? _raw_spin_unlock+0x22/0x30 [ 556.998392] ? handle_edge_irq+0x330/0x870 [ 557.002676] ? task_prio+0x50/0x50 [ 557.006223] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 557.011090] apic_timer_interrupt+0xf/0x20 [ 557.015316] [ 557.017552] RIP: 0010:do_raw_spin_lock+0x62/0x200 [ 557.022386] RSP: 0018:ffff8801ad2479a0 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 [ 557.030094] RAX: dffffc0000000000 RBX: ffff8801a816e640 RCX: 0000000000000000 [ 557.037359] RDX: 1ffff1003502dcca RSI: ffff8801ac096b38 RDI: ffff8801a816e644 [ 557.044717] RBP: ffff8801ad2479c8 R08: 0000000000004394 R09: 0000000000000004 [ 557.051983] R10: ffff8801ac096bd8 R11: ffff8801ac096300 R12: ffff8801a816e5c0 [ 557.059247] R13: ffff8801a816e650 R14: ffff8801a816e640 R15: ffff8801ad247b50 [ 557.066538] _raw_spin_lock_nested+0x30/0x40 [ 557.070945] ? d_walk+0x3ad/0xc80 [ 557.074399] d_walk+0x3ad/0xc80 [ 557.077736] ? d_shrink_del+0x3b0/0x3b0 [ 557.081709] ? dget_parent+0x680/0x680 [ 557.085596] ? shrink_dentry_list+0x5a8/0x7c0 [ 557.090095] ? is_subdir+0x480/0x480 [ 557.093810] ? d_walk+0x7bd/0xc80 [ 557.097267] shrink_dcache_parent+0x179/0x230 [ 557.101791] ? path_has_submounts+0x1a0/0x1a0 [ 557.106291] ? down_write+0x87/0x120 [ 557.110005] ? vfs_rmdir+0xe0/0x470 [ 557.113654] ? down_read+0x1b0/0x1b0 [ 557.117373] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 557.122916] ? security_inode_rmdir+0xf4/0x130 [ 557.127604] vfs_rmdir+0x202/0x470 [ 557.131156] do_rmdir+0x523/0x610 [ 557.134612] ? __ia32_sys_mkdir+0x80/0x80 [ 557.138758] ? exit_to_usermode_loop+0x87/0x310 [ 557.143436] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 557.149085] ? exit_to_usermode_loop+0x1ef/0x310 [ 557.153934] ? do_syscall_64+0x92/0x800 [ 557.157913] __x64_sys_rmdir+0x36/0x40 [ 557.161890] do_syscall_64+0x1b1/0x800 [ 557.165805] ? syscall_slow_exit_work+0x4f0/0x4f0 [ 557.170653] ? syscall_return_slowpath+0x5c0/0x5c0 [ 557.175585] ? syscall_return_slowpath+0x30f/0x5c0 [ 557.180517] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 557.185888] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 557.191080] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 557.196266] RIP: 0033:0x441aa7 [ 557.199450] RSP: 002b:00007ffed4dd3ce8 EFLAGS: 00000207 ORIG_RAX: 0000000000000054 [ 557.207172] RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000441aa7 [ 557.214449] RDX: 0000000000000000 RSI: 00000000006cd858 RDI: 00007ffed4dd4dd0 [ 557.221717] RBP: 00007ffed4dd4dd0 R08: 0000000000000000 R09: 0000000000000001 [ 557.228984] R10: 000000000000000a R11: 0000000000000207 R12: 00000000023ac8a0 [ 557.236251] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 557.244359] Dumping ftrace buffer: [ 557.248157] (ftrace buffer empty) [ 557.251858] Kernel Offset: disabled [ 557.255479] Rebooting in 86400 seconds..