[ 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 '10.128.0.177' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 35.205587] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 35.214395] REISERFS (device loop0): using ordered data mode [ 35.221715] reiserfs: using flush barriers [ 35.226944] 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 [ 35.246638] REISERFS (device loop0): checking transaction log (loop0) [ 36.611949] REISERFS (device loop0): Using tea hash to sort names [ 36.618630] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 36.626713] PGD a4a6a067 P4D a4a6a067 PUD ab9e0067 PMD 0 [ 36.632244] Oops: 0010 [#1] PREEMPT SMP KASAN [ 36.636735] CPU: 0 PID: 8087 Comm: syz-executor691 Not tainted 4.19.196-syzkaller #0 [ 36.644592] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.653927] RIP: 0010: (null) [ 36.657803] Code: Bad RIP value. [ 36.661234] RSP: 0018:ffff8880a4bb78a8 EFLAGS: 00010246 [ 36.666577] RAX: dffffc0000000000 RBX: 1ffff11014976f18 RCX: ffffffff81a51e1b [ 36.674000] RDX: 0000000000000000 RSI: ffff88808e59e2c0 RDI: ffff88808aa4e740 [ 36.681689] RBP: ffffffff8878d700 R08: 0000000000000000 R09: 0000000000000000 [ 36.688954] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808e59e2c0 [ 36.696205] R13: ffff88808aa4e740 R14: ffff8880a4bb7a38 R15: ffff8880a4bb78e0 [ 36.703454] FS: 0000000001fa0300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 36.711658] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.717531] CR2: ffffffffffffffd6 CR3: 00000000ab7ce000 CR4: 00000000001406f0 [ 36.724938] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.732291] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.739543] Call Trace: [ 36.742133] __lookup_slow+0x246/0x4a0 [ 36.746008] ? follow_dotdot_rcu+0x1040/0x1040 [ 36.750593] ? __d_lookup+0x411/0x710 [ 36.754393] ? d_lookup+0x18e/0x250 [ 36.758030] lookup_one_len+0x163/0x190 [ 36.761995] ? try_lookup_one_len+0x180/0x180 [ 36.766500] reiserfs_lookup_privroot+0x92/0x280 [ 36.771254] reiserfs_fill_super+0x202c/0x2cf0 [ 36.775924] ? reiserfs_remount+0x1540/0x1540 [ 36.780457] ? lock_downgrade+0x720/0x720 [ 36.784593] ? snprintf+0xbb/0xf0 [ 36.788054] ? wait_for_completion_io+0x10/0x10 [ 36.792707] mount_bdev+0x2fc/0x3b0 [ 36.796404] ? reiserfs_remount+0x1540/0x1540 [ 36.800896] mount_fs+0xa3/0x310 [ 36.804256] vfs_kern_mount.part.0+0x68/0x470 [ 36.808737] do_mount+0x113c/0x2f10 [ 36.812364] ? lock_acquire+0x170/0x3c0 [ 36.816335] ? check_preemption_disabled+0x41/0x280 [ 36.821345] ? copy_mount_string+0x40/0x40 [ 36.825561] ? copy_mount_options+0x59/0x380 [ 36.829951] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 36.835054] ? kmem_cache_alloc_trace+0x323/0x380 [ 36.839878] ? copy_mount_options+0x26f/0x380 [ 36.844372] ksys_mount+0xcf/0x130 [ 36.847897] __x64_sys_mount+0xba/0x150 [ 36.851858] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.856423] do_syscall_64+0xf9/0x620 [ 36.860207] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.865569] RIP: 0033:0x445b6a [ 36.868743] Code: 48 c7 c2 c0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 a8 00 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 36.887795] RSP: 002b:00007ffef5a17e28 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5 [ 36.895484] RAX: ffffffffffffffda RBX: 00007ffef5a17e80 RCX: 0000000000445b6a [ 36.902731] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffef5a17e40 [ 36.909980] RBP: 00007ffef5a17e40 R08: 00007ffef5a17e80 R09: 0000000000000000 [ 36.917317] R10: 0000000000000000 R11: 0000000000000286 R12: 00000000200002a8 [ 36.924739] R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000007 [ 36.932007] Modules linked in: [ 36.935181] CR2: 0000000000000000 [ 36.939639] ---[ end trace b779b95de8fc263d ]--- [ 36.944393] RIP: 0010: (null) [ 36.948295] Code: Bad RIP value. [ 36.951825] RSP: 0018:ffff8880a4bb78a8 EFLAGS: 00010246 [ 36.957210] RAX: dffffc0000000000 RBX: 1ffff11014976f18 RCX: ffffffff81a51e1b [ 36.964627] RDX: 0000000000000000 RSI: ffff88808e59e2c0 RDI: ffff88808aa4e740 [ 36.972582] RBP: ffffffff8878d700 R08: 0000000000000000 R09: 0000000000000000 [ 36.979964] R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808e59e2c0 [ 36.987228] R13: ffff88808aa4e740 R14: ffff8880a4bb7a38 R15: ffff8880a4bb78e0 [ 36.994615] FS: 0000000001fa0300(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 37.002949] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.008822] CR2: ffffffffffffffd6 CR3: 00000000ab7ce000 CR4: 00000000001406f0 [ 37.016216] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.023683] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.031043] Kernel panic - not syncing: Fatal exception [ 37.036460] Kernel Offset: disabled [ 37.040082] Rebooting in 86400 seconds..