[ 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... [ 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 '10.128.0.190' (ECDSA) to the list of known hosts. syzkaller login: [ 64.024976][ T7059] IPVS: ftp: loaded support on port[0] = 21 [ 64.038361][ T7061] IPVS: ftp: loaded support on port[0] = 21 [ 64.042044][ T7053] IPVS: ftp: loaded support on port[0] = 21 [ 64.054099][ T7056] IPVS: ftp: loaded support on port[0] = 21 [ 64.066835][ T7058] IPVS: ftp: loaded support on port[0] = 21 [ 64.074704][ T7060] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program [ 64.414607][ T7058] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 64.414618][ T7058] #PF: supervisor write access in kernel mode [ 64.414624][ T7058] #PF: error_code(0x0002) - not-present page [ 64.414630][ T7058] PGD 962b6067 P4D 962b6067 PUD 9441e067 PMD 0 [ 64.414651][ T7058] Oops: 0002 [#1] PREEMPT SMP KASAN [ 64.414664][ T7058] CPU: 0 PID: 7058 Comm: syz-executor367 Not tainted 5.6.0-next-20200406-syzkaller #0 [ 64.414671][ T7058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.414691][ T7058] RIP: 0010:do_syscall_64+0xf6/0x7d0 [ 64.414703][ T7058] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 7d 50 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 [ 64.414709][ T7058] RSP: 0018:ffffc90001657f28 EFLAGS: 00010286 [ 64.414719][ T7058] RAX: 0000000000000000 RBX: 0000000000000023 RCX: 0000000000000000 [ 64.414726][ T7058] RDX: 0000000000000000 RSI: ffffffff8163ea3d RDI: 0000000000000282 [ 64.414733][ T7058] RBP: ffffc90001657f58 R08: ffff8880a9156440 R09: 0000000000000000 [ 64.414739][ T7058] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 64.414746][ T7058] R13: ffffffff89949570 R14: 0000000000000000 R15: 0000000000000000 [ 64.414756][ T7058] FS: 00000000015f5940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 64.414764][ T7058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.414771][ T7058] CR2: 0000000000000000 CR3: 00000000962b7000 CR4: 00000000001406f0 [ 64.414794][ T7058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.414802][ T7058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.414805][ T7058] Call Trace: [ 64.414826][ T7058] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 64.414835][ T7058] RIP: 0033:0x4464b0 [ 64.414846][ T7058] Code: c0 5b 5d c3 66 0f 1f 44 00 00 8b 04 24 48 83 c4 18 5b 5d c3 66 0f 1f 44 00 00 83 3d 61 cb 29 00 00 75 14 b8 23 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 84 20 fc ff c3 48 83 ec 08 e8 5a 43 00 00 [ 64.414853][ T7058] RSP: 002b:00007fffeb3290d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 [ 64.414864][ T7058] RAX: ffffffffffffffda RBX: 00007fffeb329140 RCX: 00000000004464b0 [ 64.414870][ T7058] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fffeb3290e0 [ 64.414877][ T7058] RBP: 0000000000000002 R08: 0000000000000001 R09: 00000000015f5940 [ 64.414884][ T7058] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000fb38 [ 64.414891][ T7058] R13: 0000000000408a50 R14: 0000000000000000 R15: 0000000000000000 [ 64.414901][ T7058] Modules linked in: [ 64.414909][ T7058] CR2: 0000000000000000 [ 64.414921][ T7058] ---[ end trace 07b78701f72ec477 ]--- [ 64.414935][ T7058] RIP: 0010:do_syscall_64+0xf6/0x7d0 [ 64.414947][ T7058] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 7d 50 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 [ 64.414953][ T7058] RSP: 0018:ffffc90001657f28 EFLAGS: 00010286 [ 64.414962][ T7058] RAX: 0000000000000000 RBX: 0000000000000023 RCX: 0000000000000000 [ 64.414969][ T7058] RDX: 0000000000000000 RSI: ffffffff8163ea3d RDI: 0000000000000282 [ 64.414977][ T7058] RBP: ffffc90001657f58 R08: ffff8880a9156440 R09: 0000000000000000 [ 64.414984][ T7058] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 64.414991][ T7058] R13: ffffffff89949570 R14: 0000000000000000 R15: 0000000000000000 [ 64.415000][ T7058] FS: 00000000015f5940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 64.415008][ T7058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.415015][ T7058] CR2: 0000000000000000 CR3: 00000000962b7000 CR4: 00000000001406f0 [ 64.415025][ T7058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.415032][ T7058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.415038][ T7058] Kernel panic - not syncing: Fatal exception [ 64.416157][ T7058] Kernel Offset: disabled