[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.811546] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.177733] random: sshd: uninitialized urandom read (32 bytes read) [ 23.564841] random: sshd: uninitialized urandom read (32 bytes read) [ 24.437158] random: sshd: uninitialized urandom read (32 bytes read) [ 24.591054] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.15' (ECDSA) to the list of known hosts. [ 30.098993] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.771453] list_del corruption, ffff8801ce3e11e8->next is LIST_POISON1 (dead000000000100) [ 33.780371] ------------[ cut here ]------------ [ 33.785132] kernel BUG at lib/list_debug.c:47! [ 33.789769] invalid opcode: 0000 [#1] SMP KASAN [ 33.794434] CPU: 1 PID: 6061 Comm: syz-executor921 Not tainted 4.18.0-rc4+ #139 [ 33.801901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.811269] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.817136] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 66 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 e0 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de [ 33.836346] RSP: 0018:ffff8801ad86f1c0 EFLAGS: 00010286 [ 33.841713] RAX: 000000000000004e RBX: ffff8801ce3e11e8 RCX: 0000000000000000 [ 33.848996] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 33.856263] RBP: ffff8801ad86f1d8 R08: ffff8801d4bb4640 R09: ffffed003b5e4fc0 [ 33.863532] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.870794] R13: dead000000000100 R14: ffff8801ce3e11e8 R15: ffff8801ce3e11f0 [ 33.878053] FS: 00007f435930e700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 33.886283] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.892160] CR2: 00007f435930de78 CR3: 00000001d6580000 CR4: 00000000001406e0 [ 33.899436] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.906727] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.913998] Call Trace: [ 33.916598] p9_fd_cancel+0x104/0x360 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.920411] ? p9_fd_close+0x5b0/0x5b0 [ 33.924299] ? p9_pollwait+0x83/0x230 [ 33.928107] p9_client_rpc+0xf1f/0x1400 [ 33.932088] ? p9_client_prepare_req.part.8+0xcd0/0xcd0 [ 33.937467] ? __fget+0x414/0x670 [ 33.940998] ? rcu_is_watching+0x61/0x150 [ 33.945181] ? expand_files.part.8+0x9c0/0x9c0 [ 33.949758] ? finish_wait+0x430/0x430 [ 33.953645] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.958668] ? p9_fd_show_options+0x1c0/0x1c0 [ 33.963160] ? lockdep_init_map+0x9/0x10 [ 33.967229] p9_client_create+0xd09/0x16c9 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.971481] ? p9_client_read+0xc60/0xc60 [ 33.975624] ? find_held_lock+0x36/0x1c0 [ 33.979677] ? __lockdep_init_map+0x105/0x590 [ 33.984170] ? kasan_check_write+0x14/0x20 [ 33.988403] ? __init_rwsem+0x1cc/0x2a0 [ 33.992388] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 33.997411] ? rcu_read_lock_sched_held+0x108/0x120 [ 34.002442] ? __kmalloc_track_caller+0x5f5/0x760 [ 34.007311] ? save_stack+0xa9/0xd0 [ 34.010938] ? save_stack+0x43/0xd0 [ 34.014550] ? kasan_kmalloc+0xc4/0xe0 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.018428] ? kmem_cache_alloc_trace+0x152/0x780 [ 34.023283] ? memcpy+0x45/0x50 [ 34.026564] v9fs_session_init+0x21a/0x1a80 [ 34.030884] ? lock_downgrade+0x8f0/0x8f0 [ 34.035038] ? v9fs_show_options+0x7e0/0x7e0 [ 34.039456] ? kasan_check_read+0x11/0x20 [ 34.043609] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.048026] ? kasan_check_read+0x11/0x20 [ 34.052264] ? rcu_is_watching+0x8c/0x150 [ 34.056453] ? rcu_pm_notify+0xc0/0xc0 [ 34.060347] ? v9fs_mount+0x61/0x900 [ 34.064062] ? rcu_read_lock_sched_held+0x108/0x120 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.069081] ? kmem_cache_alloc_trace+0x616/0x780 [ 34.073928] v9fs_mount+0x7c/0x900 [ 34.077582] mount_fs+0xae/0x328 [ 34.080949] vfs_kern_mount.part.34+0xdc/0x4e0 [ 34.085729] ? may_umount+0xb0/0xb0 [ 34.089355] ? _raw_read_unlock+0x22/0x30 [ 34.093521] ? __get_fs_type+0x97/0xc0 [ 34.097416] do_mount+0x581/0x30e0 [ 34.100948] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.105357] ? copy_mount_string+0x40/0x40 [ 34.109583] ? copy_mount_options+0x5f/0x380 [ 34.113986] ? rcu_read_lock_sched_held+0x108/0x120 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.119002] ? kmem_cache_alloc_trace+0x616/0x780 [ 34.123855] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.129405] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.134949] ? copy_mount_options+0x285/0x380 [ 34.139447] ksys_mount+0x12d/0x140 [ 34.143068] __x64_sys_mount+0xbe/0x150 [ 34.147038] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.152056] do_syscall_64+0x1b9/0x820 [ 34.155944] ? syscall_slow_exit_work+0x500/0x500 [ 34.160780] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.165701] ? syscall_return_slowpath+0x31d/0x5e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.170643] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.176177] ? retint_user+0x18/0x18 [ 34.179886] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.184736] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.189915] RIP: 0033:0x445dc9 [ 34.193087] Code: e8 ac e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 fb 0d fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 34.212346] RSP: 002b:00007f435930dda8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 executing program executing program executing program executing program executing program executing program executing program executing program [ 34.220138] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000445dc9 [ 34.227398] RDX: 0000000020000900 RSI: 0000000020000000 RDI: 0000000000000000 [ 34.234663] RBP: 0000000000000000 R08: 00000000200002c0 R09: 0000000000000000 [ 34.241928] R10: 0000000000004000 R11: 0000000000000202 R12: 00000000006dbc20 [ 34.249191] R13: 0030656c69662f2e R14: 64663d736e617274 R15: 0000000000002710 [ 34.256466] Modules linked in: [ 34.259670] Dumping ftrace buffer: [ 34.263220] (ftrace buffer empty) [ 34.266987] ---[ end trace a0bcacf86a0110d8 ]--- executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.271805] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 [ 34.277718] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 66 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 65 1a 88 e8 36 6e 02 fe <0f> 0b 48 89 de 48 c7 c7 e0 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de [ 34.297039] RSP: 0018:ffff8801ad86f1c0 EFLAGS: 00010286 [ 34.302442] RAX: 000000000000004e RBX: ffff8801ce3e11e8 RCX: 0000000000000000 [ 34.309728] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 34.317025] RBP: ffff8801ad86f1d8 R08: ffff8801d4bb4640 R09: ffffed003b5e4fc0 [ 34.324319] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: dead000000000200 [ 34.331621] R13: dead000000000100 R14: ffff8801ce3e11e8 R15: ffff8801ce3e11f0 [ 34.338914] FS: 00007f435930e700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 34.347357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.353369] CR2: 00007f435930de78 CR3: 00000001d6580000 CR4: 00000000001406e0 [ 34.360663] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.367976] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.375268] Kernel panic - not syncing: Fatal exception [ 34.381078] Dumping ftrace buffer: [ 34.384609] (ftrace buffer empty) [ 34.388299] Kernel Offset: disabled [ 34.391906] Rebooting in 86400 seconds..