[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.0' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 61.833851][ T8494] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 61.845571][ T8494] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 61.853993][ T8494] CPU: 0 PID: 8494 Comm: syz-executor008 Not tainted 5.10.0-rc2-syzkaller #0 [ 61.862719][ T8494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.872788][ T8494] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 61.878501][ T8494] 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 06 [ 61.898087][ T8494] RSP: 0018:ffffc900010ffb78 EFLAGS: 00010202 [ 61.904150][ T8494] RAX: dffffc0000000000 RBX: ffff888021a15400 RCX: ffffffff828600a4 [ 61.912113][ T8494] RDX: 0000000000000001 RSI: ffffffff828600b6 RDI: 0000000000000008 [ 61.920077][ T8494] RBP: 1ffff9200021ff6f R08: 0000000000000001 R09: ffff888020b6c193 [ 61.928042][ T8494] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 61.936008][ T8494] R13: ffff888018786000 R14: 0000000000000000 R15: 0000000000000000 [ 61.943980][ T8494] FS: 0000000000e17880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 61.952894][ T8494] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.959475][ T8494] CR2: 000000000043e830 CR3: 0000000011702000 CR4: 00000000001506f0 [ 61.967421][ T8494] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.975364][ T8494] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.983342][ T8494] Call Trace: [ 61.986613][ T8494] ? jffs2_alloc_inode+0x40/0x40 [ 61.991568][ T8494] ? vfs_parse_fs_param+0x530/0x550 [ 61.996742][ T8494] ? rcu_read_lock_sched_held+0x3a/0x70 [ 62.002259][ T8494] ? jffs2_alloc_inode+0x40/0x40 [ 62.007165][ T8494] vfs_parse_fs_param+0x203/0x550 [ 62.012161][ T8494] vfs_parse_fs_string+0xe6/0x150 [ 62.017156][ T8494] ? vfs_parse_fs_param+0x550/0x550 [ 62.022330][ T8494] ? bpf_lsm_sb_eat_lsm_opts+0x5/0x10 [ 62.027674][ T8494] generic_parse_monolithic+0x16f/0x1f0 [ 62.033211][ T8494] ? vfs_parse_fs_string+0x150/0x150 [ 62.038478][ T8494] ? jffs2_get_parent+0x60/0x60 [ 62.043302][ T8494] ? alloc_fs_context+0x56e/0x880 [ 62.048302][ T8494] path_mount+0x1365/0x20c0 [ 62.052780][ T8494] ? strncpy_from_user+0x29e/0x3a0 [ 62.057876][ T8494] ? finish_automount+0xac0/0xac0 [ 62.062885][ T8494] ? getname_flags.part.0+0x1dd/0x4f0 [ 62.068227][ T8494] __x64_sys_mount+0x27f/0x300 [ 62.072964][ T8494] ? copy_mnt_ns+0xa60/0xa60 [ 62.077541][ T8494] ? syscall_enter_from_user_mode+0x1d/0x50 [ 62.083406][ T8494] do_syscall_64+0x2d/0x70 [ 62.087813][ T8494] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 62.093676][ T8494] RIP: 0033:0x44699a [ 62.097568][ T8494] 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 [ 62.117162][ T8494] RSP: 002b:00007ffe25615308 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 62.125547][ T8494] RAX: ffffffffffffffda RBX: 00007ffe25615350 RCX: 000000000044699a [ 62.133490][ T8494] RDX: 0000000020000380 RSI: 00000000200003c0 RDI: 0000000000000000 [ 62.141437][ T8494] RBP: 0000000000000000 R08: 00007ffe25615350 R09: 0000000000000014 [ 62.149381][ T8494] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c80 [ 62.157923][ T8494] R13: 0000000000401d10 R14: 0000000000000000 R15: 0000000000000000 [ 62.165866][ T8494] Modules linked in: [ 62.170201][ T8494] ---[ end trace dbb122c89773c3af ]--- [ 62.175708][ T8494] RIP: 0010:jffs2_parse_param+0x141/0x330 [ 62.181421][ T8494] 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 06 [ 62.201254][ T8494] RSP: 0018:ffffc900010ffb78 EFLAGS: 00010202 [ 62.207358][ T8494] RAX: dffffc0000000000 RBX: ffff888021a15400 RCX: ffffffff828600a4 [ 62.215351][ T8494] RDX: 0000000000000001 RSI: ffffffff828600b6 RDI: 0000000000000008 [ 62.223341][ T8494] RBP: 1ffff9200021ff6f R08: 0000000000000001 R09: ffff888020b6c193 [ 62.231298][ T8494] R10: 00000000003fffff R11: 0000000000000000 R12: 0000000000000000 [ 62.239277][ T8494] R13: ffff888018786000 R14: 0000000000000000 R15: 0000000000000000 [ 62.247264][ T8494] FS: 0000000000e17880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 62.256227][ T8494] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.262834][ T8494] CR2: 000000000043e830 CR3: 0000000011702000 CR4: 00000000001506f0 [ 62.270793][ T8494] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.278779][ T8494] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.286775][ T8494] Kernel panic - not syncing: Fatal exception [ 62.293532][ T8494] Kernel Offset: disabled [ 62.297840][ T8494] Rebooting in 86400 seconds..