Starting System Logging Service... Starting Permit User Sessions... [ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Found device /dev/ttyS0. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ 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 '10.128.0.37' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 78.034327][ T35] audit: type=1400 audit(1604639348.384:8): avc: denied { execmem } for pid=8470 comm="syz-executor094" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 78.038460][ T8470] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 78.066929][ T8470] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 78.075418][ T8470] CPU: 1 PID: 8470 Comm: syz-executor094 Not tainted 5.10.0-rc2-syzkaller #0 [ 78.084177][ T8470] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.094240][ T8470] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 78.099952][ T8470] 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 86 [ 78.120344][ T8470] RSP: 0018:ffffc90001067b78 EFLAGS: 00010202 [ 78.126418][ T8470] RAX: dffffc0000000000 RBX: ffff888014306c00 RCX: ffffffff8285c8b4 [ 78.134483][ T8470] RDX: 0000000000000001 RSI: ffffffff8285c8c6 RDI: 0000000000000008 [ 78.142560][ T8470] RBP: 1ffff9200020cf6f R08: 0000000000000001 R09: 0000000000000003 [ 78.150531][ T8470] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 78.158495][ T8470] R13: ffff88802727a000 R14: 0000000000000000 R15: 0000000000000000 [ 78.166575][ T8470] FS: 0000000001c82880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 78.175537][ T8470] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.182127][ T8470] CR2: 000000000043e830 CR3: 000000001b61f000 CR4: 00000000001506e0 [ 78.190097][ T8470] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.198065][ T8470] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.206025][ T8470] Call Trace: [ 78.209322][ T8470] ? jffs2_alloc_inode+0x40/0x40 [ 78.214437][ T8470] ? rcu_read_lock_sched_held+0x3a/0x70 [ 78.219989][ T8470] ? jffs2_alloc_inode+0x40/0x40 [ 78.224930][ T8470] vfs_parse_fs_param+0x203/0x550 [ 78.229983][ T8470] vfs_parse_fs_string+0xe6/0x150 [ 78.235022][ T8470] ? vfs_parse_fs_param+0x550/0x550 [ 78.240328][ T8470] ? selinux_sb_eat_lsm_opts+0x672/0x820 [ 78.245954][ T8470] ? bpf_lsm_sb_eat_lsm_opts+0x5/0x10 [ 78.252246][ T8470] generic_parse_monolithic+0x16f/0x1f0 [ 78.257901][ T8470] ? vfs_parse_fs_string+0x150/0x150 [ 78.263188][ T8470] ? jffs2_get_parent+0x60/0x60 [ 78.268248][ T8470] ? alloc_fs_context+0x56e/0x880 [ 78.273294][ T8470] path_mount+0x1365/0x20c0 [ 78.277796][ T8470] ? strncpy_from_user+0x29e/0x3a0 [ 78.282938][ T8470] ? finish_automount+0xac0/0xac0 [ 78.287967][ T8470] ? getname_flags.part.0+0x1dd/0x4f0 [ 78.293471][ T8470] __x64_sys_mount+0x27f/0x300 [ 78.298231][ T8470] ? copy_mnt_ns+0xa60/0xa60 [ 78.302835][ T8470] ? syscall_enter_from_user_mode+0x1d/0x50 [ 78.308862][ T8470] do_syscall_64+0x2d/0x70 [ 78.313288][ T8470] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 78.319452][ T8470] RIP: 0033:0x44699a [ 78.323449][ T8470] 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 [ 78.343052][ T8470] RSP: 002b:00007ffd3b8c83a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 78.351456][ T8470] RAX: ffffffffffffffda RBX: 00007ffd3b8c83f0 RCX: 000000000044699a [ 78.359415][ T8470] RDX: 0000000020000380 RSI: 00000000200003c0 RDI: 0000000000000000 [ 78.367390][ T8470] RBP: 0000000000000000 R08: 00007ffd3b8c83f0 R09: 0000000000000014 [ 78.375367][ T8470] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c80 [ 78.383336][ T8470] R13: 0000000000401d10 R14: 0000000000000000 R15: 0000000000000000 [ 78.391369][ T8470] Modules linked in: [ 78.397482][ T8470] ---[ end trace e6ace05930facc1e ]--- [ 78.403027][ T8470] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 78.408830][ T8470] 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 86 [ 78.428572][ T8470] RSP: 0018:ffffc90001067b78 EFLAGS: 00010202 [ 78.434672][ T8470] RAX: dffffc0000000000 RBX: ffff888014306c00 RCX: ffffffff8285c8b4 [ 78.442727][ T8470] RDX: 0000000000000001 RSI: ffffffff8285c8c6 RDI: 0000000000000008 [ 78.450797][ T8470] RBP: 1ffff9200020cf6f R08: 0000000000000001 R09: 0000000000000003 [ 78.458846][ T8470] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 78.466870][ T8470] R13: ffff88802727a000 R14: 0000000000000000 R15: 0000000000000000 [ 78.474933][ T8470] FS: 0000000001c82880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 78.483953][ T8470] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.490647][ T8470] CR2: 000000000043e830 CR3: 000000001b61f000 CR4: 00000000001506e0 [ 78.498766][ T8470] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.506946][ T8470] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.515039][ T8470] Kernel panic - not syncing: Fatal exception [ 78.521587][ T8470] Kernel Offset: disabled [ 78.525926][ T8470] Rebooting in 86400 seconds..