[ OK ] Started Daily apt download activities. Starting Permit User Sessions... [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. Starting getty on tty2-tty6 if dbus and logind are not available... [ OK ] Found device /dev/ttyS0. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ 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 '10.128.1.47' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 71.009065][ T35] audit: type=1400 audit(1604647046.525:8): avc: denied { execmem } for pid=8497 comm="syz-executor006" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 71.013616][ T8497] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 71.041664][ T8497] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 71.050150][ T8497] CPU: 1 PID: 8497 Comm: syz-executor006 Not tainted 5.10.0-rc2-syzkaller #0 [ 71.059006][ T8497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.069173][ T8497] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 71.074874][ T8497] 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 [ 71.094597][ T8497] RSP: 0018:ffffc90001027b78 EFLAGS: 00010202 [ 71.100734][ T8497] RAX: dffffc0000000000 RBX: ffff888013d7b000 RCX: ffffffff8285c8b4 [ 71.108754][ T8497] RDX: 0000000000000001 RSI: ffffffff8285c8c6 RDI: 0000000000000008 [ 71.116709][ T8497] RBP: 1ffff92000204f6f R08: 0000000000000001 R09: 0000000000000003 [ 71.124662][ T8497] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 71.132670][ T8497] R13: ffff888026ccc000 R14: 0000000000000000 R15: 0000000000000000 [ 71.140629][ T8497] FS: 0000000001220880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 71.149544][ T8497] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.156157][ T8497] CR2: 00007ffea3ad8000 CR3: 000000002db22000 CR4: 00000000001506e0 [ 71.164115][ T8497] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.172071][ T8497] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.180024][ T8497] Call Trace: [ 71.183305][ T8497] ? jffs2_alloc_inode+0x40/0x40 [ 71.188228][ T8497] ? rcu_read_lock_sched_held+0x3a/0x70 [ 71.193758][ T8497] ? jffs2_alloc_inode+0x40/0x40 [ 71.198708][ T8497] vfs_parse_fs_param+0x203/0x550 [ 71.203737][ T8497] vfs_parse_fs_string+0xe6/0x150 [ 71.208777][ T8497] ? vfs_parse_fs_param+0x550/0x550 [ 71.213963][ T8497] ? selinux_sb_eat_lsm_opts+0x672/0x820 [ 71.219584][ T8497] ? bpf_lsm_sb_eat_lsm_opts+0x5/0x10 [ 71.224939][ T8497] generic_parse_monolithic+0x16f/0x1f0 [ 71.230493][ T8497] ? vfs_parse_fs_string+0x150/0x150 [ 71.235795][ T8497] ? jffs2_get_parent+0x60/0x60 [ 71.240645][ T8497] ? alloc_fs_context+0x56e/0x880 [ 71.245677][ T8497] path_mount+0x1365/0x20c0 [ 71.250186][ T8497] ? strncpy_from_user+0x29e/0x3a0 [ 71.255370][ T8497] ? finish_automount+0xac0/0xac0 [ 71.260396][ T8497] ? getname_flags.part.0+0x1dd/0x4f0 [ 71.265840][ T8497] __x64_sys_mount+0x27f/0x300 [ 71.270646][ T8497] ? copy_mnt_ns+0xa60/0xa60 [ 71.275223][ T8497] ? syscall_enter_from_user_mode+0x1d/0x50 [ 71.281098][ T8497] do_syscall_64+0x2d/0x70 [ 71.285501][ T8497] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 71.291413][ T8497] RIP: 0033:0x44699a [ 71.295322][ T8497] 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 [ 71.314922][ T8497] RSP: 002b:00007ffea3ad75e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 71.323320][ T8497] RAX: ffffffffffffffda RBX: 00007ffea3ad7630 RCX: 000000000044699a [ 71.331275][ T8497] RDX: 0000000020001300 RSI: 0000000020001340 RDI: 0000000000000000 [ 71.339228][ T8497] RBP: 0000000000000000 R08: 00007ffea3ad7630 R09: 0000000000000014 [ 71.347183][ T8497] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c80 [ 71.355142][ T8497] R13: 0000000000401d10 R14: 0000000000000000 R15: 0000000000000000 [ 71.363097][ T8497] Modules linked in: [ 71.369007][ T8497] ---[ end trace 00623fcbdf8e5999 ]--- [ 71.374508][ T8497] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 71.380234][ T8497] 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 [ 71.400108][ T8497] RSP: 0018:ffffc90001027b78 EFLAGS: 00010202 [ 71.406413][ T8497] RAX: dffffc0000000000 RBX: ffff888013d7b000 RCX: ffffffff8285c8b4 [ 71.414593][ T8497] RDX: 0000000000000001 RSI: ffffffff8285c8c6 RDI: 0000000000000008 [ 71.422717][ T8497] RBP: 1ffff92000204f6f R08: 0000000000000001 R09: 0000000000000003 [ 71.430731][ T8497] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 71.438812][ T8497] R13: ffff888026ccc000 R14: 0000000000000000 R15: 0000000000000000 [ 71.446828][ T8497] FS: 0000000001220880(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 71.455808][ T8497] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.462396][ T8497] CR2: 00007ffea3ad8000 CR3: 000000002db22000 CR4: 00000000001506e0 [ 71.470405][ T8497] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.478428][ T8497] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.486463][ T8497] Kernel panic - not syncing: Fatal exception [ 71.493137][ T8497] Kernel Offset: disabled [ 71.497462][ T8497] Rebooting in 86400 seconds..