Warning: Permanently added '10.128.0.76' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   41.248993] audit: type=1400 audit(1600636846.449:8): avc:  denied  { execmem } for  pid=6483 comm="syz-executor467" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
[   41.251751] ================================================================================
[   41.277583] UBSAN: Undefined behaviour in net/sunrpc/xprt.c:568:22
[   41.283892] shift exponent 536871552 is too large for 64-bit type 'long unsigned int'
[   41.291853] CPU: 1 PID: 6483 Comm: syz-executor467 Not tainted 4.19.146-syzkaller #0
[   41.299719] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   41.309065] Call Trace:
[   41.311666]  dump_stack+0x22c/0x33e
[   41.315284]  ubsan_epilogue+0xe/0x3a
[   41.318999]  __ubsan_handle_shift_out_of_bounds.cold+0x1c4/0x250
[   41.325137]  ? lock_downgrade+0x750/0x750
[   41.329278]  ? lock_acquire+0x170/0x3f0
[   41.333257]  ? xprt_do_reserve+0x230/0x530
[   41.337495]  xprt_reset_majortimeo+0x2f8/0x3b0
[   41.342067]  ? call_bc_transmit+0x520/0x520
[   41.346385]  xprt_do_reserve+0x438/0x530
[   41.350440]  xprt_reserve+0x129/0x1f0
[   41.354259]  __rpc_execute+0x1f7/0xb80
[   41.358145]  ? rpc_exit+0x1c0/0x1c0
[   41.361758]  ? check_preemption_disabled+0x41/0x2b0
[   41.366832]  rpc_execute+0x242/0x370
[   41.370549]  ? do_raw_spin_unlock+0x171/0x240
[   41.375038]  rpc_run_task+0x4e3/0x6a0
[   41.378850]  rpc_call_sync+0xb8/0x190
[   41.382641]  ? rpc_run_task+0x6a0/0x6a0
[   41.386610]  ? unx_create+0x16/0x30
[   41.390237]  ? rpc_client_register+0x42d/0x6c0
[   41.394821]  rpc_ping+0xb5/0x110
[   41.398186]  ? rpc_call_sync+0x190/0x190
[   41.402245]  ? rpc_new_client+0x742/0xa90
[   41.406386]  rpc_create_xprt+0x313/0x3c0
[   41.410454]  rpc_create+0x31e/0x540
[   41.414068]  ? rpc_create_xprt+0x3c0/0x3c0
[   41.418296]  ? check_preemption_disabled+0x41/0x2b0
[   41.423303]  ? mark_held_locks+0xf0/0xf0
[   41.427357]  nfs_create_rpc_client+0x36f/0x440
[   41.431943]  ? nfs_mark_client_ready+0x50/0x50
[   41.436523]  ? lock_downgrade+0x750/0x750
[   41.440661]  nfs_init_client+0x6d/0x100
[   41.444626]  nfs_get_client+0xf9f/0x13e0
[   41.448703]  ? _raw_spin_unlock_irqrestore+0x7d/0xf0
[   41.453822]  nfs_init_server+0x249/0xe10
[   41.457892]  ? nfs_get_client+0x13e0/0x13e0
[   41.462207]  ? check_preemption_disabled+0x41/0x2b0
[   41.467233]  ? kmem_cache_alloc_trace+0x379/0x4b0
[   41.472083]  ? __rpc_init_priority_wait_queue+0x251/0x380
[   41.477674]  nfs_create_server+0x7a/0x4f0
[   41.482452]  ? __lock_acquire+0x6ec/0x3ff0
[   41.486704]  nfs3_create_server+0x1a/0x1b0
[   41.490998]  nfs_try_mount+0x172/0x940
[   41.494881]  ? find_held_lock+0x2d/0x110
[   41.498934]  ? nfs_request_mount.constprop.0+0x5f0/0x5f0
[   41.504388]  ? get_nfs_version+0xc7/0x2f0
[   41.508526]  ? lock_downgrade+0x750/0x750
[   41.512658]  ? lock_acquire+0x170/0x3f0
[   41.516618]  ? get_nfs_version+0x1a/0x2f0
[   41.520751]  ? __kmalloc_track_caller+0x431/0x4e0
[   41.525578]  ? do_raw_spin_unlock+0x171/0x240
[   41.530076]  nfs_fs_mount+0x171f/0x2e8e
[   41.534037]  ? nfs_remount+0x18f0/0x18f0
[   41.538101]  ? nfs_clone_super+0x400/0x400
[   41.542318]  ? param_set_portnr+0x160/0x160
[   41.546636]  ? __lockdep_init_map+0x100/0x5c0
[   41.551135]  mount_fs+0xa3/0x318
[   41.554511]  vfs_kern_mount.part.0+0x68/0x470
[   41.558993]  do_mount+0x51c/0x2f10
[   41.562519]  ? check_preemption_disabled+0x41/0x2b0
[   41.567520]  ? copy_mount_string+0x40/0x40
[   41.571758]  ? kmem_cache_alloc_trace+0x379/0x4b0
[   41.576605]  ? _copy_from_user+0xd2/0x130
[   41.580789]  ? copy_mount_options+0x261/0x370
[   41.585289]  ksys_mount+0xcf/0x130
[   41.588840]  __x64_sys_mount+0xba/0x150
[   41.592801]  ? lockdep_hardirqs_on+0x3c1/0x5e0
[   41.597371]  do_syscall_64+0xf9/0x670
[   41.601214]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   41.606450] RIP: 0033:0x4403d9
[   41.609646] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
[   41.628556] RSP: 002b:00007fffd6574338 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
[   41.636262] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00000000004403d9
[   41.643537] RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000000000000
[   41.650801] RBP: 00000000006ca018 R08: 0000000020000000 R09: 0000000000000000
[   41.658060] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401be0
[   41.665330] R13: 0000000000401c70 R14: 0000000000000000 R15: 0000000000000000
[   41.672600] ================================================================================