[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.725372] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.185461] random: sshd: uninitialized urandom read (32 bytes read) [ 20.475171] random: sshd: uninitialized urandom read (32 bytes read) [ 21.161936] random: sshd: uninitialized urandom read (32 bytes read) [ 21.310323] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. [ 26.878593] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 26.962535] IPVS: ftp: loaded support on port[0] = 21 [ 26.986593] FAULT_INJECTION: forcing a failure. [ 26.986593] name failslab, interval 1, probability 0, space 0, times 1 [ 26.997845] CPU: 1 PID: 4470 Comm: syz-executor042 Not tainted 4.18.0-rc3-next-20180706+ #1 [ 27.006322] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.015666] Call Trace: [ 27.018246] dump_stack+0x1c9/0x2b4 [ 27.021854] ? dump_stack_print_info.cold.2+0x52/0x52 [ 27.027035] ? legitimize_mnt+0x240/0x240 [ 27.031185] should_fail.cold.4+0xa/0x11 [ 27.035229] ? fault_create_debugfs_attr+0x1f0/0x1f0 [ 27.040323] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 27.045321] ? bpf_prog_kallsyms_find+0xde/0x4c0 [ 27.050061] ? trace_hardirqs_on+0x10/0x10 [ 27.054280] ? lock_downgrade+0x8f0/0x8f0 [ 27.058504] ? lock_release+0xa30/0xa30 [ 27.062462] ? kasan_check_read+0x11/0x20 [ 27.066605] ? lock_acquire+0x1e4/0x540 [ 27.070563] ? fs_reclaim_acquire+0x20/0x20 [ 27.074864] ? lock_downgrade+0x8f0/0x8f0 [ 27.078996] ? check_same_owner+0x340/0x340 [ 27.083302] ? unwind_get_return_address+0x61/0xa0 [ 27.088214] ? rcu_note_context_switch+0x730/0x730 [ 27.093122] __should_failslab+0x124/0x180 [ 27.097340] should_failslab+0x9/0x14 [ 27.101126] kmem_cache_alloc_trace+0x2cb/0x780 [ 27.105774] ? save_stack+0xa9/0xd0 [ 27.109382] ? save_stack+0x43/0xd0 [ 27.112986] ? kasan_kmalloc+0xc4/0xe0 [ 27.116875] ? kmem_cache_alloc_trace+0x152/0x780 [ 27.121707] ? kernfs_get_tree+0xde/0xba0 [ 27.125842] alloc_super+0xd4/0xb10 [ 27.129450] ? destroy_unused_super.part.11+0x110/0x110 [ 27.134794] ? sget_fc+0x261/0x960 [ 27.138315] ? lock_downgrade+0x8f0/0x8f0 [ 27.142444] ? kasan_check_read+0x11/0x20 [ 27.146579] ? do_raw_spin_unlock+0xa7/0x2f0 [ 27.150967] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 27.155532] ? kasan_check_write+0x14/0x20 [ 27.159753] ? do_raw_spin_lock+0xc1/0x200 [ 27.163969] ? kernfs_sop_show_options+0x190/0x190 [ 27.168879] sget_fc+0x269/0x960 [ 27.172228] ? kernfs_sop_show_path+0x1b0/0x1b0 [ 27.176895] ? alloc_super+0xb10/0xb10 [ 27.180764] ? kmem_cache_alloc_trace+0x318/0x780 [ 27.185591] ? lock_release+0xa30/0xa30 [ 27.189547] kernfs_get_tree+0x229/0xba0 [ 27.193592] ? kasan_unpoison_shadow+0x35/0x50 [ 27.198155] ? kasan_kmalloc+0xc4/0xe0 [ 27.202030] ? kernfs_super_ns+0x70/0x70 [ 27.206074] ? __kmalloc_track_caller+0x311/0x760 [ 27.210900] ? generic_parse_monolithic+0xfd/0x180 [ 27.215815] sysfs_get_tree+0x40/0x120 [ 27.219685] vfs_get_tree+0x1cb/0x5c0 [ 27.223474] do_mount+0x6c1/0x1fb0 [ 27.226993] ? kasan_check_write+0x14/0x20 [ 27.231214] ? copy_mount_string+0x40/0x40 [ 27.235437] ? kasan_kmalloc+0xc4/0xe0 [ 27.239307] ? kmem_cache_alloc_trace+0x318/0x780 [ 27.244131] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.249654] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.255170] ? copy_mount_options+0x285/0x380 [ 27.259643] ksys_mount+0x12d/0x140 [ 27.263250] __x64_sys_mount+0xbe/0x150 [ 27.267208] do_syscall_64+0x1b9/0x820 [ 27.271078] ? syscall_return_slowpath+0x5e0/0x5e0 [ 27.275996] ? syscall_return_slowpath+0x31d/0x5e0 [ 27.280911] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 27.285908] ? prepare_exit_to_usermode+0x291/0x3b0 [ 27.290906] ? perf_trace_sys_enter+0xb10/0xb10 [ 27.295554] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.300376] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.305550] RIP: 0033:0x440c89 [ 27.308717] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 bb 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 27.327851] RSP: 002b:00007ffe59b66978 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 27.335539] RAX: ffffffffffffffda RBX: 00007ffe59b66990 RCX: 0000000000440c89 [ 27.342803] RDX: 0000000020000280 RSI: 00000000200000c0 RDI: 0000000020000000 [ 27.350051] RBP: 0000000000000004 R08: 0000000020000180 R09: 0000000000000000 [ 27.357314] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.364564] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 27.371998] Filesystem sysfs get_tree() didn't set fc->root [ 27.377806] ------------[ cut here ]------------ [ 27.382539] kernel BUG at fs/super.c:1761! [ 27.386790] invalid opcode: 0000 [#1] SMP KASAN [ 27.391468] CPU: 1 PID: 4470 Comm: syz-executor042 Not tainted 4.18.0-rc3-next-20180706+ #1 [ 27.399933] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.409286] RIP: 0010:vfs_get_tree.cold.21+0x4f/0x60 [ 27.414370] Code: 37 00 48 c1 e0 2a 48 89 da 48 c1 ea 03 80 3c 02 00 74 08 48 89 df e8 30 f0 f4 ff 48 8b 33 48 c7 c7 a0 5a f3 87 e8 05 36 9d ff <0f> 0b 4c 89 ef e8 17 f0 f4 ff eb c0 90 90 90 90 90 55 48 89 e5 53 [ 27.433495] RSP: 0018:ffff8801aac07be0 EFLAGS: 00010286 [ 27.438838] RAX: 000000000000002f RBX: ffffffff8906e5e0 RCX: 0000000000000000 [ 27.446105] RDX: 0000000000000000 RSI: ffffffff81634381 RDI: 0000000000000001 [ 27.453353] RBP: ffff8801aac07c10 R08: ffff8801a6cd6440 R09: ffffed003b5e4fc0 [ 27.460609] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: 0000000000000000 [ 27.467864] R13: ffff8801bf72bdc8 R14: 0000000000000020 R15: ffff8801bf72bdd8 [ 27.475117] FS: 0000000001bf0880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 27.483323] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.489183] CR2: 00000000004b4f7c CR3: 00000001c4ae4000 CR4: 00000000001406e0 [ 27.496442] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.503688] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.510932] Call Trace: [ 27.513502] do_mount+0x6c1/0x1fb0 [ 27.517029] ? kasan_check_write+0x14/0x20 [ 27.521244] ? copy_mount_string+0x40/0x40 [ 27.525467] ? kasan_kmalloc+0xc4/0xe0 [ 27.529345] ? kmem_cache_alloc_trace+0x318/0x780 [ 27.534166] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.539682] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 27.545201] ? copy_mount_options+0x285/0x380 [ 27.549696] ksys_mount+0x12d/0x140 [ 27.554146] __x64_sys_mount+0xbe/0x150 [ 27.558106] do_syscall_64+0x1b9/0x820 [ 27.561981] ? syscall_return_slowpath+0x5e0/0x5e0 [ 27.566889] ? syscall_return_slowpath+0x31d/0x5e0 [ 27.571800] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 27.576804] ? prepare_exit_to_usermode+0x291/0x3b0 [ 27.581804] ? perf_trace_sys_enter+0xb10/0xb10 [ 27.586454] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.591278] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.596455] RIP: 0033:0x440c89 [ 27.599620] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 bb 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 27.618843] RSP: 002b:00007ffe59b66978 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 27.626536] RAX: ffffffffffffffda RBX: 00007ffe59b66990 RCX: 0000000000440c89 [ 27.633788] RDX: 0000000020000280 RSI: 00000000200000c0 RDI: 0000000020000000 [ 27.641039] RBP: 0000000000000004 R08: 0000000020000180 R09: 0000000000000000 [ 27.648295] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.655541] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 27.662797] Modules linked in: [ 27.665972] Dumping ftrace buffer: [ 27.669501] (ftrace buffer empty) [ 27.673252] ---[ end trace 07cdba975902c41a ]--- [ 27.678049] RIP: 0010:vfs_get_tree.cold.21+0x4f/0x60 [ 27.683169] Code: 37 00 48 c1 e0 2a 48 89 da 48 c1 ea 03 80 3c 02 00 74 08 48 89 df e8 30 f0 f4 ff 48 8b 33 48 c7 c7 a0 5a f3 87 e8 05 36 9d ff <0f> 0b 4c 89 ef e8 17 f0 f4 ff eb c0 90 90 90 90 90 55 48 89 e5 53 [ 27.702440] RSP: 0018:ffff8801aac07be0 EFLAGS: 00010286 [ 27.707821] RAX: 000000000000002f RBX: ffffffff8906e5e0 RCX: 0000000000000000 [ 27.715110] RDX: 0000000000000000 RSI: ffffffff81634381 RDI: 0000000000000001 [ 27.722405] RBP: ffff8801aac07c10 R08: ffff8801a6cd6440 R09: ffffed003b5e4fc0 [ 27.729693] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: 0000000000000000 [ 27.736976] R13: ffff8801bf72bdc8 R14: 0000000000000020 R15: ffff8801bf72bdd8 [ 27.744258] FS: 0000000001bf0880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 27.752496] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.758403] CR2: 00000000004b4f7c CR3: 00000001c4ae4000 CR4: 00000000001406e0 [ 27.765779] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.773060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.780350] Kernel panic - not syncing: Fatal exception [ 27.786143] Dumping ftrace buffer: [ 27.789664] (ftrace buffer empty) [ 27.793361] Kernel Offset: disabled [ 27.796975] Rebooting in 86400 seconds..