Warning: Permanently added '10.128.0.37' (ECDSA) to the list of known hosts.
syzkaller login: [   73.144188][ T6603] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
[   73.155998][ T6603] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
[   73.164391][ T6603] CPU: 0 PID: 6603 Comm: syz-executor127 Not tainted 5.14.0-rc4-next-20210806-syzkaller #0
[   73.174360][ T6603] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   73.184409][ T6603] RIP: 0010:udmabuf_create+0x664/0x16f0
[   73.189969][ T6603] Code: 03 48 89 84 24 90 00 00 00 e9 38 01 00 00 e8 23 7a f7 fc 4d 89 f4 49 c1 e4 06 4c 03 24 24 49 8d 7c 24 08 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 d3 0d 00 00 4d 8b 6c 24 08 31 ff 4c 89 eb 83
[   73.209615][ T6603] RSP: 0018:ffffc90002d7fc70 EFLAGS: 00010202
[   73.215732][ T6603] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
[   73.223739][ T6603] RDX: ffff888023f69c80 RSI: ffffffff847e4f3d RDI: 0000000000000008
[   73.231707][ T6603] RBP: 0000000000000000 R08: fffffffffffff000 R09: 0000000000000000
[   73.239659][ T6603] R10: ffffffff847e50f5 R11: 0000000000000000 R12: 0000000000000000
[   73.247611][ T6603] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   73.255576][ T6603] FS:  0000000000935300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
[   73.264487][ T6603] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   73.271052][ T6603] CR2: 000000002000020c CR3: 0000000018d16000 CR4: 00000000001506f0
[   73.279037][ T6603] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   73.286995][ T6603] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   73.294960][ T6603] Call Trace:
[   73.298248][ T6603]  ? release_udmabuf+0x490/0x490
[   73.303193][ T6603]  udmabuf_ioctl+0x152/0x2c0
[   73.307783][ T6603]  ? udmabuf_create+0x16f0/0x16f0
[   73.312794][ T6603]  ? lock_downgrade+0x6e0/0x6e0
[   73.317638][ T6603]  ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70
[   73.323866][ T6603]  ? udmabuf_create+0x16f0/0x16f0
[   73.329061][ T6603]  __x64_sys_ioctl+0x193/0x200
[   73.333810][ T6603]  do_syscall_64+0x35/0xb0
[   73.338226][ T6603]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   73.344106][ T6603] RIP: 0033:0x43eed9
[   73.347990][ T6603] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[   73.367579][ T6603] RSP: 002b:00007fff10c6b558 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   73.375986][ T6603] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043eed9
[   73.383936][ T6603] RDX: 0000000020000180 RSI: 0000000040187542 RDI: 0000000000000003
executing program
[   73.391986][ T6603] RBP: 0000000000402ec0 R08: 0000000000400488 R09: 0000000000400488
[   73.400203][ T6603] R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000402f50
[   73.408158][ T6603] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
[   73.416209][ T6603] Modules linked in:
[   73.421218][ T6603] ---[ end trace e38355abd6102561 ]---
[   73.426697][ T6603] RIP: 0010:udmabuf_create+0x664/0x16f0
[   73.432447][ T6603] Code: 03 48 89 84 24 90 00 00 00 e9 38 01 00 00 e8 23 7a f7 fc 4d 89 f4 49 c1 e4 06 4c 03 24 24 49 8d 7c 24 08 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 d3 0d 00 00 4d 8b 6c 24 08 31 ff 4c 89 eb 83
[   73.452643][ T6603] RSP: 0018:ffffc90002d7fc70 EFLAGS: 00010202
[   73.458772][ T6603] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000000
[   73.466778][ T6603] RDX: ffff888023f69c80 RSI: ffffffff847e4f3d RDI: 0000000000000008
[   73.475702][ T6603] RBP: 0000000000000000 R08: fffffffffffff000 R09: 0000000000000000
[   73.483787][ T6603] R10: ffffffff847e50f5 R11: 0000000000000000 R12: 0000000000000000
[   73.491837][ T6603] R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
[   73.499854][ T6603] FS:  0000000000935300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
[   73.509069][ T6603] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   73.515656][ T6603] CR2: 00007fff86ca0778 CR3: 0000000018d16000 CR4: 00000000001506e0
[   73.523659][ T6603] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   73.531682][ T6603] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   73.539691][ T6603] Kernel panic - not syncing: Fatal exception
[   73.547300][ T6603] Kernel Offset: disabled
[   73.551709][ T6603] Rebooting in 86400 seconds..