[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

syzkaller login: [   40.219330] can: request_module (can-proto-0) failed.
[   40.227825] can: request_module (can-proto-0) failed.
[   41.027301] IPVS: ftp: loaded support on port[0] = 21
[   41.530894] 8021q: adding VLAN 0 to HW filter on device bond0
[   41.590383] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[   43.114540] bond0 (unregistering): Released all slaves
Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts.
2019/08/01 04:06:30 parsed 1 programs
2019/08/01 04:06:30 executed programs: 0
[   48.582108] IPVS: ftp: loaded support on port[0] = 21
[   48.596095] IPVS: ftp: loaded support on port[0] = 21
[   48.599562] IPVS: ftp: loaded support on port[0] = 21
[   48.627964] IPVS: ftp: loaded support on port[0] = 21
[   48.641336] IPVS: ftp: loaded support on port[0] = 21
[   48.647964] IPVS: ftp: loaded support on port[0] = 21
RESULT: signal 0, coverage 0 errno 0
[   48.681449] hfs: unable to locate alternate MDB
[   48.686252] hfs: continuing without an alternate MDB
[   48.707363] ------------[ cut here ]------------
[   48.712196] kernel BUG at fs/hfs/inode.c:441!
[   48.716823] invalid opcode: 0000 [#1] SMP KASAN
[   48.721483] CPU: 0 PID: 173 Comm: kworker/u4:3 Not tainted 5.3.0-rc2+ #1
[   48.728308] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   48.737653] Workqueue: writeback wb_workfn (flush-7:0)
[   48.742912] RIP: 0010:hfs_write_inode+0x46d/0xa50
[   48.747729] Code: c4 38 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 83 f8 03 0f 84 9f 00 00 00 48 83 f8 04 74 0c 48 83 f8 02 0f 84 4a fc ff ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 28 48 89 fa 48 c1
[   48.766606] RSP: 0018:ffff8881d9627788 EFLAGS: 00010293
[   48.771942] RAX: 0000000000000000 RBX: 1ffff1103b2c4ef4 RCX: ffff8881d961ad50
[   48.779190] RDX: 0000000000000000 RSI: ffff8881d9627a08 RDI: ffff8881bb28ecc0
[   48.786438] RBP: ffff8881d96278e8 R08: 0000000000000000 R09: ffffed103b606c5c
[   48.793682] R10: ffffed103b606c5b R11: ffff8881db0362db R12: ffff8881bb28ec80
[   48.800928] R13: dffffc0000000000 R14: ffff8881d96278c0 R15: 0000000000000003
[   48.808173] FS:  0000000000000000(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000
[   48.816375] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   48.822234] CR2: 000000000210dfd0 CR3: 00000001d853d000 CR4: 00000000001406f0
[   48.829483] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   48.836730] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   48.843979] Call Trace:
[   48.846546]  ? find_held_lock+0x36/0x1d0
[   48.850581]  ? hfs_inode_write_fork+0x1c0/0x1c0
[   48.855224]  ? __writeback_single_inode+0x402/0xda0
[   48.860214]  ? lock_downgrade+0x900/0x900
[   48.864337]  ? __kasan_check_write+0x14/0x20
[   48.868734]  ? do_raw_spin_lock+0x123/0x2d0
[   48.873036]  __writeback_single_inode+0x8be/0xda0
[   48.877862]  ? _raw_spin_unlock+0x22/0x30
[   48.881984]  writeback_sb_inodes+0x47d/0xf10
[   48.886369]  ? move_expired_inodes+0x18a/0x8f0
[   48.890925]  ? __writeback_single_inode+0xda0/0xda0
[   48.896093]  ? rcu_read_lock_sched_held+0x108/0x120
[   48.901082]  ? queue_io+0x319/0x440
[   48.904945]  wb_writeback+0x2a0/0x960
[   48.908720]  ? writeback_inodes_wb.constprop.50+0x180/0x180
[   48.914411]  ? __local_bh_enable_ip+0x161/0x230
[   48.919055]  ? _raw_spin_unlock_bh+0x30/0x40
[   48.923441]  wb_workfn+0x32b/0xf40
[   48.926955]  ? inode_wait_for_writeback+0x30/0x30
RESULT: signal 0, coverage 0 errno 0
[   48.931775]  process_one_work+0x852/0x15e0
[   48.935984]  ? pwq_dec_nr_in_flight+0x2c0/0x2c0
[   48.940739]  ? lock_acquire+0x194/0x3e0
[   48.944689]  worker_thread+0x81/0xb80
[   48.948468]  kthread+0x334/0x3f0
[   48.951807]  ? process_one_work+0x15e0/0x15e0
[   48.956287]  ? kthread_cancel_delayed_work_sync+0x10/0x10
[   48.961796]  ret_from_fork+0x3a/0x50
[   48.965484] Modules linked in:
[   48.968743] ---[ end trace 19e467360ef699ce ]---
[   48.973509] RIP: 0010:hfs_write_inode+0x46d/0xa50
[   48.974334] hfs: unable to locate alternate MDB
[   48.978372] Code: c4 38 01 00 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 83 f8 03 0f 84 9f 00 00 00 48 83 f8 04 74 0c 48 83 f8 02 0f 84 4a fc ff ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 28 48 89 fa 48 c1
[   48.978375] RSP: 0018:ffff8881d9627788 EFLAGS: 00010293
[   48.978380] RAX: 0000000000000000 RBX: 1ffff1103b2c4ef4 RCX: ffff8881d961ad50
[   48.978383] RDX: 0000000000000000 RSI: ffff8881d9627a08 RDI: ffff8881bb28ecc0
[   48.983050] hfs: continuing without an alternate MDB
[   49.002108] RBP: ffff8881d96278e8 R08: 0000000000000000 R09: ffffed103b606c5c
[   49.002111] R10: ffffed103b606c5b R11: ffff8881db0362db R12: ffff8881bb28ec80
[   49.002113] R13: dffffc0000000000 R14: ffff8881d96278c0 R15: 0000000000000003
[   49.002117] FS:  0000000000000000(0000) GS:ffff8881db000000(0000) knlGS:0000000000000000
[   49.002120] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   49.063112] CR2: 000000000210dfd0 CR3: 000000000806e000 CR4: 00000000001406f0
[   49.070112] hfs: unable to locate alternate MDB
[   49.070386] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   49.075052] hfs: continuing without an alternate MDB
[   49.082299] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   49.082304] Kernel panic - not syncing: Fatal exception
[   49.100468] Kernel Offset: disabled
[   49.104826] Rebooting in 86400 seconds..