[ 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 '10.128.0.88' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.712387] kasan: CONFIG_KASAN_INLINE enabled [ 27.717316] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.730924] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.737147] Modules linked in: [ 27.740312] CPU: 0 PID: 8015 Comm: syz-executor481 Not tainted 4.14.300-syzkaller #0 [ 27.748177] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 27.757503] task: ffff8880961de000 task.stack: ffff888095b30000 [ 27.763538] RIP: 0010:hfs_find_init+0x70/0x220 [ 27.768090] RSP: 0018:ffff888095b37600 EFLAGS: 00010202 [ 27.773421] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 27.780662] RDX: 0000000000000008 RSI: ffff888095b37668 RDI: ffff888095b37680 [ 27.787900] RBP: ffff888095b37668 R08: 0000000000000000 R09: ffffffff8ae15f04 [ 27.795143] R10: 00000000001466e9 R11: ffff8880961de000 R12: 0000000000000004 [ 27.802384] R13: 0000000000000040 R14: ffff8880b2eff772 R15: ffff888095b37668 [ 27.809627] FS: 0000555556af2300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 27.817839] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.823690] CR2: 000055e3c75d0ea0 CR3: 00000000ac2f3000 CR4: 00000000003406f0 [ 27.830934] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.838176] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.845420] Call Trace: [ 27.847985] hfs_ext_read_extent+0x15e/0x930 [ 27.852365] ? __hfs_ext_write_extent+0x4d0/0x4d0 [ 27.857176] ? create_page_buffers+0x14d/0x1c0 [ 27.861729] ? lock_downgrade+0x740/0x740 [ 27.865848] hfs_get_block+0x453/0x6d0 [ 27.869708] block_read_full_page+0x25e/0x8d0 [ 27.874183] ? hfs_extend_file+0xa40/0xa40 [ 27.878387] ? __lru_cache_add+0x178/0x250 [ 27.882593] ? __bread_gfp+0x2e0/0x2e0 [ 27.886455] ? add_to_page_cache_locked+0x40/0x40 [ 27.891268] ? alloc_pages_current+0x15d/0x260 [ 27.895821] do_read_cache_page+0x38e/0xc10 [ 27.900114] ? hfs_bmap+0x30/0x30 [ 27.903536] hfs_btree_open+0x667/0x1300 [ 27.907573] hfs_mdb_get+0x129c/0x1b40 [ 27.911437] ? hfs_mdb_put+0x370/0x370 [ 27.915300] ? lock_downgrade+0x740/0x740 [ 27.919418] ? __lockdep_init_map+0x100/0x560 [ 27.923886] ? __lockdep_init_map+0x100/0x560 [ 27.928355] hfs_fill_super+0xcdb/0x1250 [ 27.932392] ? hfs_remount+0x1b0/0x1b0 [ 27.936250] ? reacquire_held_locks+0xb5/0x3f0 [ 27.940817] ? vsnprintf+0x260/0x1340 [ 27.944592] ? pointer+0x9e0/0x9e0 [ 27.948100] ? lock_downgrade+0x740/0x740 [ 27.952219] ? snprintf+0xa5/0xd0 [ 27.955641] ? vsprintf+0x30/0x30 [ 27.959065] ? ns_test_super+0x50/0x50 [ 27.962925] ? set_blocksize+0x125/0x380 [ 27.966957] mount_bdev+0x2b3/0x360 [ 27.970554] ? hfs_remount+0x1b0/0x1b0 [ 27.974411] mount_fs+0x92/0x2a0 [ 27.977754] vfs_kern_mount.part.0+0x5b/0x470 [ 27.982219] do_mount+0xe65/0x2a30 [ 27.985730] ? retint_kernel+0x2d/0x2d [ 27.989588] ? copy_mount_string+0x40/0x40 [ 27.993793] ? memset+0x20/0x40 [ 27.997042] ? copy_mount_options+0x1fa/0x2f0 [ 28.001507] ? copy_mnt_ns+0xa30/0xa30 [ 28.005364] SyS_mount+0xa8/0x120 [ 28.008788] ? copy_mnt_ns+0xa30/0xa30 [ 28.012646] do_syscall_64+0x1d5/0x640 [ 28.016507] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.021665] Code: 48 c1 ea 03 80 3c 02 00 0f 85 ad 01 00 00 4c 8d 6b 40 48 c7 45 18 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 5c 01 00 00 8b 43 40 be c0 [ 28.040728] RIP: hfs_find_init+0x70/0x220 RSP: ffff888095b37600 [ 28.047030] ---[ end trace db275c7a785fcc4e ]--- [ 28.051901] Kernel panic - not syncing: Fatal exception [ 28.057298] Kernel Offset: disabled [ 28.060901] Rebooting in 86400 seconds..