[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.210' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 68.864864][ T6913] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 68.876734][ T6913] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 68.885134][ T6913] CPU: 1 PID: 6913 Comm: syz-executor971 Not tainted 5.9.0-rc5-next-20200918-syzkaller #0 [ 68.895020][ T6913] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.905068][ T6913] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 68.910767][ T6913] Code: 48 c1 ea 03 4d 63 fc 80 3c 02 00 0f 85 de 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 00 49 8d 7e 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c8 01 00 00 4d 8b 76 08 4c 89 ff 4c 89 f6 e8 56 [ 68.930468][ T6913] RSP: 0018:ffffc90001177b78 EFLAGS: 00010202 [ 68.936530][ T6913] RAX: dffffc0000000000 RBX: ffff8880a84e2400 RCX: ffffffff8285a4f4 [ 68.944587][ T6913] RDX: 0000000000000001 RSI: ffffffff8285a506 RDI: 0000000000000008 [ 68.952558][ T6913] RBP: 1ffff9200022ef6f R08: 0000000000000001 R09: 0000000000000003 [ 68.960510][ T6913] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 68.968473][ T6913] R13: ffff8880a8654000 R14: 0000000000000000 R15: 0000000000000000 [ 68.976438][ T6913] FS: 0000000001aea880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 68.985342][ T6913] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.991906][ T6913] CR2: 000000000043e830 CR3: 00000000a18b2000 CR4: 00000000001506e0 [ 68.999856][ T6913] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.007821][ T6913] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.015764][ T6913] Call Trace: [ 69.019051][ T6913] ? jffs2_alloc_inode+0x40/0x40 [ 69.023965][ T6913] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 69.029486][ T6913] ? __kmalloc_track_caller+0x291/0x4d0 [ 69.035006][ T6913] ? jffs2_alloc_inode+0x40/0x40 [ 69.039922][ T6913] vfs_parse_fs_param+0x203/0x550 [ 69.044934][ T6913] vfs_parse_fs_string+0xe6/0x150 [ 69.049933][ T6913] ? vfs_parse_fs_param+0x550/0x550 [ 69.055120][ T6913] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 69.060663][ T6913] ? trace_kmalloc+0xbe/0xf0 [ 69.065229][ T6913] ? kmem_cache_alloc_trace+0x1b9/0x480 [ 69.071182][ T6913] ? bpf_lsm_sb_eat_lsm_opts+0x5/0x10 [ 69.076537][ T6913] generic_parse_monolithic+0x16f/0x1f0 [ 69.082057][ T6913] ? vfs_parse_fs_string+0x150/0x150 [ 69.087331][ T6913] ? jffs2_get_parent+0x60/0x60 [ 69.092172][ T6913] ? alloc_fs_context+0x5c6/0x9f0 [ 69.097172][ T6913] path_mount+0x1266/0x1e70 [ 69.101678][ T6913] ? strncpy_from_user+0x29e/0x3a0 [ 69.106867][ T6913] ? copy_mount_string+0x40/0x40 [ 69.111780][ T6913] ? getname_flags.part.0+0x1dd/0x4f0 [ 69.117128][ T6913] __x64_sys_mount+0x27f/0x300 [ 69.121870][ T6913] ? copy_mnt_ns+0xae0/0xae0 [ 69.126436][ T6913] ? check_preemption_disabled+0x50/0x130 [ 69.132130][ T6913] ? syscall_enter_from_user_mode+0x1d/0x60 [ 69.137998][ T6913] do_syscall_64+0x2d/0x70 [ 69.142407][ T6913] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 69.148290][ T6913] RIP: 0033:0x44699a [ 69.152164][ T6913] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d ae fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a ae fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 69.171756][ T6913] RSP: 002b:00007ffed1da9298 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 69.180168][ T6913] RAX: ffffffffffffffda RBX: 00007ffed1da92e0 RCX: 000000000044699a [ 69.188119][ T6913] RDX: 0000000020001300 RSI: 0000000020001340 RDI: 0000000000000000 [ 69.196169][ T6913] RBP: 0000000000000000 R08: 00007ffed1da92e0 R09: 0000000000000014 [ 69.204116][ T6913] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c80 [ 69.212079][ T6913] R13: 0000000000401d10 R14: 0000000000000000 R15: 0000000000000000 [ 69.220031][ T6913] Modules linked in: [ 69.231237][ T6913] ---[ end trace c0191e56324a95df ]--- [ 69.231258][ T6913] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 69.231272][ T6913] Code: 48 c1 ea 03 4d 63 fc 80 3c 02 00 0f 85 de 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 00 49 8d 7e 08 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 c8 01 00 00 4d 8b 76 08 4c 89 ff 4c 89 f6 e8 56 [ 69.231280][ T6913] RSP: 0018:ffffc90001177b78 EFLAGS: 00010202 [ 69.231295][ T6913] RAX: dffffc0000000000 RBX: ffff8880a84e2400 RCX: ffffffff8285a4f4 [ 69.231303][ T6913] RDX: 0000000000000001 RSI: ffffffff8285a506 RDI: 0000000000000008 [ 69.231311][ T6913] RBP: 1ffff9200022ef6f R08: 0000000000000001 R09: 0000000000000003 [ 69.231320][ T6913] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 69.231328][ T6913] R13: ffff8880a8654000 R14: 0000000000000000 R15: 0000000000000000 [ 69.231339][ T6913] FS: 0000000001aea880(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 [ 69.231347][ T6913] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.231363][ T6913] CR2: 00007f0b903f2000 CR3: 00000000a18b2000 CR4: 00000000001506e0 [ 69.332294][ T6913] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.340484][ T6913] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.348660][ T6913] Kernel panic - not syncing: Fatal exception [ 69.356163][ T6913] Kernel Offset: disabled [ 69.360505][ T6913] Rebooting in 86400 seconds..