[ 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 '10.128.1.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.081974][ T26] audit: type=1400 audit(1602572569.062:8): avc: denied { execmem } for pid=6850 comm="syz-executor848" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 73.084889][ T6850] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 73.114295][ T6850] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 73.122726][ T6850] CPU: 0 PID: 6850 Comm: syz-executor848 Not tainted 5.9.0-syzkaller #0 [ 73.131019][ T6850] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.141061][ T6850] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 73.146760][ T6850] 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 e6 [ 73.166363][ T6850] RSP: 0018:ffffc900051d7b78 EFLAGS: 00010202 [ 73.172511][ T6850] RAX: dffffc0000000000 RBX: ffff88809e604c00 RCX: ffffffff82883ac4 [ 73.180547][ T6850] RDX: 0000000000000001 RSI: ffffffff82883ad6 RDI: 0000000000000008 [ 73.188970][ T6850] RBP: 1ffff92000a3af6f R08: 0000000000000001 R09: 0000000000000003 [ 73.196940][ T6850] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 73.204901][ T6850] R13: ffff88809fb0a000 R14: 0000000000000000 R15: 0000000000000000 [ 73.212851][ T6850] FS: 0000000002322880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 73.221755][ T6850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.228312][ T6850] CR2: 000000000043e830 CR3: 00000000923e5000 CR4: 00000000001506f0 [ 73.236260][ T6850] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.244294][ T6850] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.252237][ T6850] Call Trace: [ 73.255517][ T6850] ? jffs2_alloc_inode+0x40/0x40 [ 73.260430][ T6850] ? vfs_parse_fs_string+0x70/0x150 [ 73.265604][ T6850] ? jffs2_alloc_inode+0x40/0x40 [ 73.270537][ T6850] vfs_parse_fs_param+0x203/0x550 [ 73.275549][ T6850] vfs_parse_fs_string+0xe6/0x150 [ 73.280545][ T6850] ? vfs_parse_fs_param+0x550/0x550 [ 73.285736][ T6850] ? selinux_sb_eat_lsm_opts+0x672/0x820 [ 73.291356][ T6850] ? bpf_lsm_sb_eat_lsm_opts+0x5/0x10 [ 73.296710][ T6850] generic_parse_monolithic+0x16f/0x1f0 [ 73.302229][ T6850] ? vfs_parse_fs_string+0x150/0x150 [ 73.307492][ T6850] ? jffs2_get_parent+0x60/0x60 [ 73.312317][ T6850] ? alloc_fs_context+0x56e/0x880 [ 73.317315][ T6850] path_mount+0x133f/0x20a0 [ 73.321805][ T6850] ? strncpy_from_user+0x2bf/0x3e0 [ 73.326900][ T6850] ? copy_mount_string+0x40/0x40 [ 73.331839][ T6850] ? getname_flags.part.0+0x1dd/0x4f0 [ 73.337194][ T6850] __x64_sys_mount+0x27f/0x300 [ 73.341948][ T6850] ? copy_mnt_ns+0xa60/0xa60 [ 73.346528][ T6850] ? check_preemption_disabled+0x50/0x130 [ 73.352225][ T6850] ? syscall_enter_from_user_mode+0x1d/0x60 [ 73.358096][ T6850] do_syscall_64+0x2d/0x70 [ 73.362502][ T6850] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.368457][ T6850] RIP: 0033:0x44699a [ 73.372331][ T6850] 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 [ 73.392019][ T6850] RSP: 002b:00007ffde4bcc798 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 73.400414][ T6850] RAX: ffffffffffffffda RBX: 00007ffde4bcc7e0 RCX: 000000000044699a [ 73.408372][ T6850] RDX: 0000000020001300 RSI: 0000000020001340 RDI: 0000000000000000 [ 73.416372][ T6850] RBP: 0000000000000000 R08: 00007ffde4bcc7e0 R09: 0000000000000014 [ 73.424338][ T6850] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c80 [ 73.432307][ T6850] R13: 0000000000401d10 R14: 0000000000000000 R15: 0000000000000000 [ 73.440259][ T6850] Modules linked in: [ 73.444771][ T6850] ---[ end trace 101b848ed7a2609a ]--- [ 73.450612][ T6850] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 73.456340][ T6850] 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 e6 [ 73.476016][ T6850] RSP: 0018:ffffc900051d7b78 EFLAGS: 00010202 [ 73.482121][ T6850] RAX: dffffc0000000000 RBX: ffff88809e604c00 RCX: ffffffff82883ac4 [ 73.490139][ T6850] RDX: 0000000000000001 RSI: ffffffff82883ad6 RDI: 0000000000000008 [ 73.498131][ T6850] RBP: 1ffff92000a3af6f R08: 0000000000000001 R09: 0000000000000003 [ 73.506135][ T6850] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 73.514414][ T6850] R13: ffff88809fb0a000 R14: 0000000000000000 R15: 0000000000000000 [ 73.522469][ T6850] FS: 0000000002322880(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000 [ 73.532785][ T6850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 73.539411][ T6850] CR2: 000000000043e830 CR3: 00000000923e5000 CR4: 00000000001506f0 [ 73.547379][ T6850] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 73.555406][ T6850] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 73.563462][ T6850] Kernel panic - not syncing: Fatal exception [ 73.570562][ T6850] Kernel Offset: disabled [ 73.574874][ T6850] Rebooting in 86400 seconds..