Warning: Permanently added '10.128.0.246' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   76.214325][ T9077] IPVS: ftp: loaded support on port[0] = 21
[   76.246835][ T3678] BUG: unable to handle page fault for address: fffff52000780000
[   76.254971][ T3678] #PF: supervisor read access in kernel mode
[   76.261232][ T3678] #PF: error_code(0x0000) - not-present page
[   76.267468][ T3678] PGD 21ffee067 P4D 21ffee067 PUD aa51c067 PMD a7dd0067 PTE 0
[   76.275435][ T3678] Oops: 0000 [#1] PREEMPT SMP KASAN
[   76.281049][ T3678] CPU: 1 PID: 3678 Comm: ion_system_heap Not tainted 5.4.0-next-20191206-syzkaller #0
[   76.290755][ T3678] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   76.300820][ T3678] RIP: 0010:check_memory_region+0x9c/0x1a0
[   76.306696][ T3678] Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 10 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 a7 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 53 80
[   76.326561][ T3678] RSP: 0018:ffffc9000c907ab8 EFLAGS: 00010212
[   76.332739][ T3678] RAX: fffff52000780000 RBX: fffff52000781600 RCX: ffffffff85df4159
[   76.340701][ T3678] RDX: 0000000000000001 RSI: 000000000000b000 RDI: ffffc90003c00000
[   76.348662][ T3678] RBP: ffffc9000c907ad0 R08: fffff52000781600 R09: 0000000000001600
[   76.356622][ T3678] R10: fffff520007815ff R11: ffffc90003c0afff R12: fffff52000780000
[   76.364587][ T3678] R13: 000000000000b000 R14: 0000000000000000 R15: ffffc9000c907d08
[   76.372950][ T3678] FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   76.382616][ T3678] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   76.389308][ T3678] CR2: fffff52000780000 CR3: 0000000091ea0000 CR4: 00000000001406e0
[   76.397496][ T3678] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   76.406126][ T3678] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   76.414096][ T3678] Call Trace:
[   76.417785][ T3678]  memset+0x24/0x40
[   76.421687][ T3678]  ion_heap_clear_pages+0x49/0x70
[   76.426708][ T3678]  ion_heap_sglist_zero+0x245/0x270
[   76.432261][ T3678]  ? ion_heap_deferred_free+0x630/0x630
[   76.437883][ T3678]  ? mark_lock+0xc2/0x1220
[   76.442419][ T3678]  ? __kasan_check_read+0x11/0x20
[   76.447598][ T3678]  ? __lock_acquire+0x16f2/0x4a00
[   76.452622][ T3678]  ? finish_wait+0x18c/0x260
[   76.457390][ T3678]  ? find_held_lock+0x35/0x130
[   76.462498][ T3678]  ? ion_heap_deferred_free+0x295/0x630
[   76.468042][ T3678]  ? pgprot_writecombine+0x5e/0xf0
[   76.473397][ T3678]  ? pagerange_is_ram_callback+0x130/0x130
[   76.479341][ T3678]  ? ion_heap_deferred_free+0x295/0x630
[   76.485004][ T3678]  ion_heap_buffer_zero+0xf5/0x150
[   76.490572][ T3678]  ion_system_heap_free+0x1eb/0x250
[   76.495760][ T3678]  ion_buffer_destroy+0x159/0x2d0
[   76.501118][ T3678]  ion_heap_deferred_free+0x29d/0x630
[   76.506828][ T3678]  ? ion_heap_shrink_scan+0x1d0/0x1d0
[   76.512558][ T3678]  ? trace_hardirqs_on+0x67/0x240
[   76.517666][ T3678]  ? finish_wait+0x260/0x260
[   76.522337][ T3678]  ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20
[   76.529076][ T3678]  ? __kthread_parkme+0x108/0x1c0
[   76.534089][ T3678]  ? __kasan_check_read+0x11/0x20
[   76.539390][ T3678]  kthread+0x361/0x430
[   76.543453][ T3678]  ? ion_heap_shrink_scan+0x1d0/0x1d0
[   76.548953][ T3678]  ? kthread_mod_delayed_work+0x1f0/0x1f0
[   76.554917][ T3678]  ret_from_fork+0x24/0x30
[   76.559433][ T3678] Modules linked in:
[   76.563457][ T3678] CR2: fffff52000780000
[   76.567612][ T3678] ---[ end trace 041a7f6a398e3540 ]---
[   76.573071][ T3678] RIP: 0010:check_memory_region+0x9c/0x1a0
[   76.578916][ T3678] Code: c9 4d 0f 49 c1 49 c1 f8 03 45 85 c0 0f 84 10 01 00 00 41 83 e8 01 4e 8d 44 c0 08 eb 0d 48 83 c0 08 4c 39 c0 0f 84 a7 00 00 00 <48> 83 38 00 74 ed 4c 8d 40 08 eb 09 48 83 c0 01 49 39 c0 74 53 80
[   76.598992][ T3678] RSP: 0018:ffffc9000c907ab8 EFLAGS: 00010212
[   76.605121][ T3678] RAX: fffff52000780000 RBX: fffff52000781600 RCX: ffffffff85df4159
[   76.613084][ T3678] RDX: 0000000000000001 RSI: 000000000000b000 RDI: ffffc90003c00000
[   76.621415][ T3678] RBP: ffffc9000c907ad0 R08: fffff52000781600 R09: 0000000000001600
[   76.629378][ T3678] R10: fffff520007815ff R11: ffffc90003c0afff R12: fffff52000780000
[   76.637861][ T3678] R13: 000000000000b000 R14: 0000000000000000 R15: ffffc9000c907d08
[   76.646214][ T3678] FS:  0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
[   76.655645][ T3678] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   76.662587][ T3678] CR2: fffff52000780000 CR3: 0000000091ea0000 CR4: 00000000001406e0
[   76.670759][ T3678] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   76.679029][ T3678] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   76.687360][ T3678] Kernel panic - not syncing: Fatal exception
[   76.695264][ T3678] Kernel Offset: disabled
[   76.699708][ T3678] Rebooting in 86400 seconds..