[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.218' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 31.706575] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 31.715463] REISERFS (device loop0): using ordered data mode [ 31.721268] reiserfs: using flush barriers [ 31.732654] REISERFS (device loop0): journal params: device loop0, size 15748, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 [ 31.751740] REISERFS (device loop0): checking transaction log (loop0) [ 32.742235] REISERFS (device loop0): Using tea hash to sort names [ 32.749354] BUG: unable to handle kernel NULL pointer dereference at (null) [ 32.757848] IP: (null) [ 32.761197] PGD b2fc8067 P4D b2fc8067 PUD b2fdf067 PMD 0 [ 32.766726] Oops: 0010 [#1] PREEMPT SMP KASAN [ 32.772458] Modules linked in: [ 32.775927] CPU: 1 PID: 8012 Comm: syz-executor002 Not tainted 4.14.237-syzkaller #0 [ 32.784492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.794424] task: ffff8880b0b9e640 task.stack: ffff8880920f8000 [ 32.800457] RIP: 0010: (null) [ 32.804432] RSP: 0018:ffff8880920ffa30 EFLAGS: 00010246 [ 32.810005] RAX: dffffc0000000000 RBX: ffffffff8796bec0 RCX: 0000000000000000 [ 32.817405] RDX: 0000000000000000 RSI: ffff88808e8cc9a0 RDI: ffff88808d143748 [ 32.825227] RBP: ffff88808d143748 R08: 0000000000000001 R09: 0000000000000002 [ 32.832830] R10: 0000000000000000 R11: ffff8880b0b9e640 R12: ffff88808e8cc9a0 [ 32.840307] R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000076 [ 32.847681] FS: 00000000010fd300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 32.856727] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 32.862612] CR2: 0000000000000000 CR3: 00000000b533e000 CR4: 00000000001406e0 [ 32.870763] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 32.878020] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 32.885678] Call Trace: [ 32.888700] __lookup_hash+0x1bb/0x270 [ 32.892577] ? __inode_permission+0xcd/0x2f0 [ 32.897253] lookup_one_len+0x279/0x3a0 [ 32.901565] ? lookup_one_len_unlocked+0x410/0x410 [ 32.906481] reiserfs_lookup_privroot+0x92/0x270 [ 32.911226] reiserfs_fill_super+0x1ae0/0x28c0 [ 32.916203] ? reiserfs_remount+0x1390/0x1390 [ 32.921029] ? lock_downgrade+0x740/0x740 [ 32.925247] ? snprintf+0xa5/0xd0 [ 32.928867] mount_bdev+0x2b3/0x360 [ 32.932745] ? reiserfs_remount+0x1390/0x1390 [ 32.937235] mount_fs+0x92/0x2a0 [ 32.940590] vfs_kern_mount.part.0+0x5b/0x470 [ 32.945510] do_mount+0xe53/0x2a00 [ 32.949040] ? copy_mount_string+0x40/0x40 [ 32.953960] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 32.959273] ? copy_mnt_ns+0xa30/0xa30 [ 32.963325] ? copy_mount_options+0x1fa/0x2f0 [ 32.967823] ? copy_mnt_ns+0xa30/0xa30 [ 32.971701] SyS_mount+0xa8/0x120 [ 32.975134] ? copy_mnt_ns+0xa30/0xa30 [ 32.979015] do_syscall_64+0x1d5/0x640 [ 32.982888] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 32.988239] RIP: 0033:0x4451aa [ 32.991417] RSP: 002b:00007ffccf2d4d18 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 32.999112] RAX: ffffffffffffffda RBX: 00007ffccf2d4d70 RCX: 00000000004451aa [ 33.006471] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffccf2d4d30 [ 33.013804] RBP: 00007ffccf2d4d30 R08: 00007ffccf2d4d70 R09: 0000000000000000 [ 33.021279] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200002a8 [ 33.028818] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000007 [ 33.036336] Code: Bad RIP value. [ 33.039905] RIP: (null) RSP: ffff8880920ffa30 [ 33.045964] CR2: 0000000000000000 [ 33.050002] ---[ end trace f253ca1b942a7c13 ]--- [ 33.055122] Kernel panic - not syncing: Fatal exception [ 33.062844] Kernel Offset: disabled [ 33.067240] Rebooting in 86400 seconds..