[ 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 '10.128.0.137' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 42.949288][ T6843] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN [ 42.961147][ T6843] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 42.969531][ T6843] CPU: 1 PID: 6843 Comm: syz-executor095 Not tainted 5.9.0-rc7-syzkaller #0 [ 42.978170][ T6843] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.988223][ T6843] RIP: 0010:jffs2_parse_param+0x1bf/0x300 [ 42.993912][ T6843] Code: 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 06 92 2e ff 49 63 c5 48 89 04 24 49 8b 2e 48 83 c5 08 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 e2 91 2e ff 4c 8b 7d 00 4c 89 ff [ 43.013486][ T6843] RSP: 0018:ffffc900055c7d38 EFLAGS: 00010202 [ 43.019535][ T6843] RAX: 0000000000000001 RBX: ffff888096d6c800 RCX: 0000000000000003 [ 43.027480][ T6843] RDX: ffff888090aaa240 RSI: 0000000000000000 RDI: 00000000003fffff [ 43.035422][ T6843] RBP: 0000000000000008 R08: ffffffff82864fa9 R09: ffffffff82864f6e [ 43.043364][ T6843] R10: 0000000000000002 R11: ffff888090aaa240 R12: dffffc0000000000 [ 43.051301][ T6843] R13: 0000000000000000 R14: ffff888090a22000 R15: 1ffff92000ab8fbc [ 43.059243][ T6843] FS: 00000000007af880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 43.068140][ T6843] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.074693][ T6843] CR2: 00007ffce6a39000 CR3: 000000009df34000 CR4: 00000000001506e0 [ 43.082646][ T6843] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.090618][ T6843] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.098564][ T6843] Call Trace: [ 43.101833][ T6843] vfs_parse_fs_param+0x1e5/0x460 [ 43.106829][ T6843] generic_parse_monolithic+0x230/0x350 [ 43.112378][ T6843] path_mount+0x176c/0x29e0 [ 43.116874][ T6843] __se_sys_mount+0x126/0x180 [ 43.121537][ T6843] do_syscall_64+0x31/0x70 [ 43.126010][ T6843] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 43.132000][ T6843] RIP: 0033:0x44699a [ 43.135871][ T6843] 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 [ 43.155466][ T6843] RSP: 002b:00007ffce6a37ff8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 43.163856][ T6843] RAX: ffffffffffffffda RBX: 00007ffce6a38040 RCX: 000000000044699a [ 43.171818][ T6843] RDX: 0000000020001300 RSI: 0000000020001340 RDI: 0000000000000000 [ 43.179782][ T6843] RBP: 0000000000000000 R08: 00007ffce6a38040 R09: 0000000000000014 [ 43.187743][ T6843] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c80 [ 43.195688][ T6843] R13: 0000000000401d10 R14: 0000000000000000 R15: 0000000000000000 [ 43.203674][ T6843] Modules linked in: [ 43.209418][ T6843] ---[ end trace c6758d4f38932c6a ]--- [ 43.218969][ T6843] RIP: 0010:jffs2_parse_param+0x1bf/0x300 [ 43.224953][ T6843] Code: 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 06 92 2e ff 49 63 c5 48 89 04 24 49 8b 2e 48 83 c5 08 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 ef e8 e2 91 2e ff 4c 8b 7d 00 4c 89 ff [ 43.244748][ T6843] RSP: 0018:ffffc900055c7d38 EFLAGS: 00010202 [ 43.250855][ T6843] RAX: 0000000000000001 RBX: ffff888096d6c800 RCX: 0000000000000003 [ 43.258831][ T6843] RDX: ffff888090aaa240 RSI: 0000000000000000 RDI: 00000000003fffff [ 43.266843][ T6843] RBP: 0000000000000008 R08: ffffffff82864fa9 R09: ffffffff82864f6e [ 43.275574][ T6843] R10: 0000000000000002 R11: ffff888090aaa240 R12: dffffc0000000000 [ 43.283669][ T6843] R13: 0000000000000000 R14: ffff888090a22000 R15: 1ffff92000ab8fbc [ 43.291667][ T6843] FS: 00000000007af880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 43.300727][ T6843] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 43.307295][ T6843] CR2: 0000565098bdd668 CR3: 000000009df34000 CR4: 00000000001506f0 [ 43.315305][ T6843] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.323306][ T6843] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.331296][ T6843] Kernel panic - not syncing: Fatal exception [ 43.338869][ T6843] Kernel Offset: disabled [ 43.343638][ T6843] Rebooting in 86400 seconds..