[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.128' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 346.390767] kasan: CONFIG_KASAN_INLINE enabled [ 346.395622] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 346.403014] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 346.409242] Modules linked in: [ 346.412503] CPU: 1 PID: 7984 Comm: syz-executor377 Not tainted 4.14.295-syzkaller #0 [ 346.420439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 346.429770] task: ffff8880aaf00640 task.stack: ffff8880b3378000 [ 346.435807] RIP: 0010:dtSplitUp+0x11c1/0x47d0 [ 346.440406] RSP: 0018:ffff8880b337f7e0 EFLAGS: 00010246 [ 346.445928] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 346.453176] RDX: 0000000000000000 RSI: ffff8880b337fcb0 RDI: ffff8880b337fb80 [ 346.460438] RBP: 0000000000000000 R08: ffffffff8b9a1db8 R09: 0000000000000004 [ 346.467699] R10: 0000000000000000 R11: ffff8880aaf00640 R12: ffff88808e3ad468 [ 346.474967] R13: ffff8880b337fb78 R14: ffff88808e3ad5a8 R15: ffff88808e3ad228 [ 346.482230] FS: 0000555556a8d300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 346.490435] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 346.496384] CR2: 00007ffd9ff27cb8 CR3: 000000009b76f000 CR4: 00000000003406e0 [ 346.503642] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 346.510903] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 346.518154] Call Trace: [ 346.520730] ? add_lock_to_list.constprop.0+0x17d/0x330 [ 346.526083] ? save_trace+0xd6/0x290 [ 346.529847] ? __lock_acquire+0x2190/0x3f20 [ 346.534160] ? dtSplitRoot+0x14b0/0x14b0 [ 346.538310] ? debug_check_no_obj_freed+0x2c0/0x680 [ 346.543347] ? trace_hardirqs_on+0x10/0x10 [ 346.547576] ? lock_acquire+0x170/0x3f0 [ 346.551544] ? up_read+0x17/0x30 [ 346.554893] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 346.559976] ? txLockAlloc+0x1c3/0x270 [ 346.563872] ? txLock+0x5e2/0x18a0 [ 346.567421] ? lock_acquire+0x170/0x3f0 [ 346.571387] ? lock_downgrade+0x740/0x740 [ 346.575518] dtInsert+0x77c/0x9e0 [ 346.578963] ? dtSearch+0x1ba0/0x1ba0 [ 346.582751] ? txEnd+0x2d0/0x2d0 [ 346.586101] ? elf_core_dump+0x491/0x48b0 [ 346.590226] jfs_create.part.0+0x364/0x800 [ 346.594435] ? jfs_mkdir+0x50/0x50 [ 346.597954] ? debug_check_no_obj_freed+0x2c0/0x680 [ 346.602969] ? lock_downgrade+0x740/0x740 [ 346.607092] ? __dquot_initialize+0x228/0xa70 [ 346.611575] ? dquot_initialize_needed+0x240/0x240 [ 346.616498] ? map_id_up+0xe9/0x180 [ 346.620103] ? security_inode_permission+0xb5/0xf0 [ 346.625009] jfs_create+0x35/0x50 [ 346.628506] vfs_create+0x3e3/0x620 [ 346.632110] SyS_mknodat+0x2f4/0x470 [ 346.635800] ? do_file_open_root+0x490/0x490 [ 346.640183] ? __close_fd+0x159/0x230 [ 346.644059] ? do_syscall_64+0x4c/0x640 [ 346.648009] ? do_file_open_root+0x490/0x490 [ 346.652394] do_syscall_64+0x1d5/0x640 [ 346.656260] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 346.661424] RIP: 0033:0x7f341cc1ee99 [ 346.665107] RSP: 002b:00007ffe6bb915b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 [ 346.672795] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f341cc1ee99 [ 346.680040] RDX: 0000000000000008 RSI: 0000000020000180 RDI: 0000000000000003 [ 346.687290] RBP: 00007f341cbde700 R08: 0000000000000000 R09: 0000000000000000 [ 346.694534] R10: 0000000000000103 R11: 0000000000000246 R12: 00000000f8008000 [ 346.701779] R13: 0000000000000000 R14: 00083878000000f4 R15: 0000000000000000 [ 346.709050] Code: f6 f4 18 ff 48 8b 44 24 50 48 8b 74 24 18 48 8d 58 e8 48 89 1e e8 e0 f4 18 ff 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 b8 2c 00 00 48 8b 33 48 85 f6 0f 85 18 1a 00 [ 346.728115] RIP: dtSplitUp+0x11c1/0x47d0 RSP: ffff8880b337f7e0 [ 346.734431] ---[ end trace 9afa8b7de5625124 ]--- [ 346.739183] Kernel panic - not syncing: Fatal exception [ 346.744705] Kernel Offset: disabled [ 346.748318] Rebooting in 86400 seconds..