Warning: Permanently added '10.128.0.175' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [  143.576812][ T8440] =====================================================
[  143.583795][ T8440] BUG: KMSAN: uninit-value in xa_load+0x83b/0x8a0
[  143.590198][ T8440] CPU: 0 PID: 8440 Comm: syz-executor560 Not tainted 5.8.0-rc5-syzkaller #0
[  143.598984][ T8440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  143.609029][ T8440] Call Trace:
[  143.612420][ T8440]  dump_stack+0x1df/0x240
[  143.616745][ T8440]  kmsan_report+0xf7/0x1e0
[  143.621152][ T8440]  __msan_warning+0x58/0xa0
[  143.625737][ T8440]  xa_load+0x83b/0x8a0
[  143.630801][ T8440]  ucma_get_ctx+0x7f/0x310
[  143.635213][ T8440]  ? kmsan_get_shadow_origin_ptr+0x81/0xb0
[  143.641020][ T8440]  ucma_accept+0x259/0xc90
[  143.645436][ T8440]  ? kmsan_get_metadata+0x11d/0x180
[  143.650649][ T8440]  ? kmsan_get_metadata+0x4f/0x180
[  143.655766][ T8440]  ? kmsan_set_origin_checked+0x95/0xf0
[  143.661301][ T8440]  ? kmsan_internal_unpoison_shadow+0x2f/0x40
[  143.667370][ T8440]  ? _copy_from_user+0x15b/0x260
[  143.673081][ T8440]  ? kmsan_get_metadata+0x4f/0x180
[  143.678209][ T8440]  ? ucma_listen+0x470/0x470
[  143.682790][ T8440]  ucma_write+0x5c5/0x630
[  143.687145][ T8440]  do_iter_write+0x710/0xdc0
[  143.691763][ T8440]  ? ucma_get_global_nl_info+0xe0/0xe0
[  143.697236][ T8440]  do_writev+0x42d/0x8f0
[  143.701487][ T8440]  ? kmsan_get_shadow_origin_ptr+0x81/0xb0
[  143.707285][ T8440]  ? __msan_metadata_ptr_for_store_4+0x13/0x20
[  143.713450][ T8440]  ? __prepare_exit_to_usermode+0x16c/0x4d0
[  143.719355][ T8440]  __se_sys_writev+0x9b/0xb0
[  143.723965][ T8440]  __x64_sys_writev+0x4a/0x70
[  143.728641][ T8440]  do_syscall_64+0xb0/0x150
[  143.733153][ T8440]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  143.739047][ T8440] RIP: 0033:0x4402e9
[  143.742923][ T8440] Code: Bad RIP value.
[  143.746971][ T8440] RSP: 002b:00007fffa058a4f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[  143.755370][ T8440] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402e9
[  143.763333][ T8440] RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000003
[  143.772253][ T8440] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[  143.780216][ T8440] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0
[  143.788179][ T8440] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000
[  143.796149][ T8440] 
[  143.798460][ T8440] Local variable ----cmd@ucma_accept created at:
[  143.804779][ T8440]  ucma_accept+0x95/0xc90
[  143.809093][ T8440]  ucma_accept+0x95/0xc90
[  143.813406][ T8440] =====================================================
[  143.820459][ T8440] Disabling lock debugging due to kernel taint
[  143.827825][ T8440] Kernel panic - not syncing: panic_on_warn set ...
[  143.834426][ T8440] CPU: 0 PID: 8440 Comm: syz-executor560 Tainted: G    B             5.8.0-rc5-syzkaller #0
[  143.844472][ T8440] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  143.854533][ T8440] Call Trace:
[  143.857835][ T8440]  dump_stack+0x1df/0x240
[  143.862162][ T8440]  panic+0x3d5/0xc3e
[  143.866074][ T8440]  kmsan_report+0x1df/0x1e0
[  143.870578][ T8440]  __msan_warning+0x58/0xa0
[  143.875079][ T8440]  xa_load+0x83b/0x8a0
[  143.879174][ T8440]  ucma_get_ctx+0x7f/0x310
[  143.883582][ T8440]  ? kmsan_get_shadow_origin_ptr+0x81/0xb0
[  143.890092][ T8440]  ucma_accept+0x259/0xc90
[  143.894530][ T8440]  ? kmsan_get_metadata+0x11d/0x180
[  143.899728][ T8440]  ? kmsan_get_metadata+0x4f/0x180
[  143.904828][ T8440]  ? kmsan_set_origin_checked+0x95/0xf0
[  143.910374][ T8440]  ? kmsan_internal_unpoison_shadow+0x2f/0x40
[  143.916434][ T8440]  ? _copy_from_user+0x15b/0x260
[  143.921363][ T8440]  ? kmsan_get_metadata+0x4f/0x180
[  143.926471][ T8440]  ? ucma_listen+0x470/0x470
[  143.931049][ T8440]  ucma_write+0x5c5/0x630
[  143.935394][ T8440]  do_iter_write+0x710/0xdc0
[  143.940009][ T8440]  ? ucma_get_global_nl_info+0xe0/0xe0
[  143.945478][ T8440]  do_writev+0x42d/0x8f0
[  143.949744][ T8440]  ? kmsan_get_shadow_origin_ptr+0x81/0xb0
[  143.955544][ T8440]  ? __msan_metadata_ptr_for_store_4+0x13/0x20
[  143.961698][ T8440]  ? __prepare_exit_to_usermode+0x16c/0x4d0
[  143.967599][ T8440]  __se_sys_writev+0x9b/0xb0
[  143.972192][ T8440]  __x64_sys_writev+0x4a/0x70
[  143.976894][ T8440]  do_syscall_64+0xb0/0x150
[  143.981446][ T8440]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  143.987337][ T8440] RIP: 0033:0x4402e9
[  143.991209][ T8440] Code: Bad RIP value.
[  143.995258][ T8440] RSP: 002b:00007fffa058a4f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
[  144.003657][ T8440] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402e9
[  144.011639][ T8440] RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000003
[  144.019614][ T8440] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
[  144.027587][ T8440] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0
[  144.035549][ T8440] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000
[  144.046498][ T8440] Kernel Offset: 0x2c800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[  144.058234][ T8440] Rebooting in 86400 seconds..