Warning: Permanently added '10.128.0.93' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 74.131486][ T8494] ================================================================================ [ 74.141029][ T8494] UBSAN: shift-out-of-bounds in net/sunrpc/xprt.c:658:14 [ 74.148044][ T8494] shift exponent 536871232 is too large for 64-bit type 'long unsigned int' [ 74.157677][ T8494] CPU: 1 PID: 8494 Comm: syz-executor211 Not tainted 5.10.0-rc7-next-20201210-syzkaller #0 [ 74.167681][ T8494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.177914][ T8494] Call Trace: [ 74.181195][ T8494] dump_stack+0x107/0x163 [ 74.185548][ T8494] ubsan_epilogue+0xb/0x5a [ 74.189953][ T8494] __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 [ 74.196716][ T8494] ? ktime_get+0x1bf/0x1e0 [ 74.201123][ T8494] xprt_calc_majortimeo.isra.0.cold+0x17/0x46 [ 74.207195][ T8494] xprt_request_init+0x486/0x9e0 [ 74.212145][ T8494] xprt_reserve+0x18f/0x280 [ 74.216656][ T8494] ? call_bc_transmit_status+0x240/0x240 [ 74.222291][ T8494] __rpc_execute+0x21d/0x1360 [ 74.226970][ T8494] ? trace_event_raw_event_rpc_xdr_alignment+0xb40/0xb40 [ 74.233986][ T8494] ? lock_downgrade+0x6d0/0x6d0 [ 74.239634][ T8494] rpc_execute+0x230/0x350 [ 74.244048][ T8494] rpc_run_task+0x5d0/0x8f0 [ 74.248555][ T8494] rpc_call_sync+0xc6/0x1a0 [ 74.253067][ T8494] ? rpc_run_task+0x8f0/0x8f0 [ 74.257746][ T8494] ? rpc_new_client+0x94f/0x1310 [ 74.262688][ T8494] rpc_create_xprt+0x3f1/0x4a0 [ 74.267452][ T8494] ? rpc_call_sync+0x1a0/0x1a0 [ 74.272224][ T8494] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 74.278472][ T8494] ? xprt_create_transport+0xd6/0x7d0 [ 74.283845][ T8494] rpc_create+0x354/0x670 [ 74.288173][ T8494] ? rpc_create_xprt+0x4a0/0x4a0 [ 74.293117][ T8494] ? __lock_acquire+0xbdc/0x54b0 [ 74.298072][ T8494] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 74.304046][ T8494] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 74.310039][ T8494] nfs_create_rpc_client+0x4eb/0x680 [ 74.315422][ T8494] ? nfs_mark_client_ready+0x50/0x50 [ 74.320712][ T8494] ? do_raw_spin_lock+0x120/0x2b0 [ 74.325736][ T8494] nfs_init_client+0x6d/0x100 [ 74.330418][ T8494] nfs_get_client+0xcd7/0x1020 [ 74.335200][ T8494] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.341279][ T8494] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.347526][ T8494] nfs_init_server.isra.0+0x2c0/0xed0 [ 74.353159][ T8494] ? nfs_get_client+0x1020/0x1020 [ 74.358213][ T8494] ? unpoison_range+0x2c/0x50 [ 74.362897][ T8494] ? ____kasan_kmalloc.constprop.0+0xa0/0xd0 [ 74.368902][ T8494] nfs_create_server+0x18f/0x650 [ 74.373843][ T8494] nfs_try_get_tree+0x181/0x9f0 [ 74.378692][ T8494] ? find_held_lock+0x2d/0x110 [ 74.383451][ T8494] ? nfs_get_tree_common+0x1380/0x1380 [ 74.388996][ T8494] ? get_nfs_version+0xc7/0x2f0 [ 74.393960][ T8494] ? lock_downgrade+0x6d0/0x6d0 [ 74.398819][ T8494] ? do_raw_spin_lock+0x120/0x2b0 [ 74.403856][ T8494] ? rwlock_bug.part.0+0x90/0x90 [ 74.408791][ T8494] ? nfs_get_tree+0x806/0x1520 [ 74.413549][ T8494] ? rcu_read_lock_sched_held+0x3a/0x70 [ 74.419091][ T8494] ? do_raw_spin_unlock+0x171/0x230 [ 74.424294][ T8494] nfs_get_tree+0xaa1/0x1520 [ 74.428972][ T8494] vfs_get_tree+0x89/0x2f0 [ 74.433404][ T8494] path_mount+0x12ae/0x1e70 [ 74.437919][ T8494] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.444159][ T8494] ? strncpy_from_user+0x2a0/0x3e0 [ 74.449289][ T8494] ? finish_automount+0xb20/0xb20 [ 74.454339][ T8494] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.460687][ T8494] ? getname_flags.part.0+0x1dd/0x4f0 [ 74.466073][ T8494] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.472320][ T8494] __x64_sys_mount+0x27f/0x300 [ 74.477085][ T8494] ? copy_mnt_ns+0xae0/0xae0 [ 74.481772][ T8494] ? syscall_enter_from_user_mode+0x1d/0x50 [ 74.487668][ T8494] do_syscall_64+0x2d/0x70 [ 74.492085][ T8494] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.497972][ T8494] RIP: 0033:0x440419 [ 74.501859][ T8494] 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 [ 74.521470][ T8494] RSP: 002b:00007ffe282dde28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 74.529895][ T8494] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440419 [ 74.537862][ T8494] RDX: 0000000020fb5ffc RSI: 0000000020343ff8 RDI: 0000000020000100 [ 74.545824][ T8494] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 74.554058][ T8494] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c20 [ 74.562020][ T8494] R13: 0000000000401cb0 R14: 0000000000000000 R15: 0000000000000000 [ 74.570834][ T8494] ================================================================================ [ 74.581470][ T8494] Kernel panic - not syncing: panic_on_warn set ... [ 74.588090][ T8494] CPU: 0 PID: 8494 Comm: syz-executor211 Not tainted 5.10.0-rc7-next-20201210-syzkaller #0 [ 74.598088][ T8494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.608145][ T8494] Call Trace: [ 74.611447][ T8494] dump_stack+0x107/0x163 [ 74.615768][ T8494] panic+0x343/0x77f [ 74.619649][ T8494] ? __warn_printk+0xf3/0xf3 [ 74.624244][ T8494] ? ubsan_epilogue+0x3e/0x5a [ 74.628911][ T8494] ubsan_epilogue+0x54/0x5a [ 74.633412][ T8494] __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 [ 74.640178][ T8494] ? ktime_get+0x1bf/0x1e0 [ 74.644582][ T8494] xprt_calc_majortimeo.isra.0.cold+0x17/0x46 [ 74.650651][ T8494] xprt_request_init+0x486/0x9e0 [ 74.655578][ T8494] xprt_reserve+0x18f/0x280 [ 74.660067][ T8494] ? call_bc_transmit_status+0x240/0x240 [ 74.665685][ T8494] __rpc_execute+0x21d/0x1360 [ 74.670348][ T8494] ? trace_event_raw_event_rpc_xdr_alignment+0xb40/0xb40 [ 74.677363][ T8494] ? lock_downgrade+0x6d0/0x6d0 [ 74.682216][ T8494] rpc_execute+0x230/0x350 [ 74.686621][ T8494] rpc_run_task+0x5d0/0x8f0 [ 74.691115][ T8494] rpc_call_sync+0xc6/0x1a0 [ 74.695608][ T8494] ? rpc_run_task+0x8f0/0x8f0 [ 74.700278][ T8494] ? rpc_new_client+0x94f/0x1310 [ 74.705217][ T8494] rpc_create_xprt+0x3f1/0x4a0 [ 74.709972][ T8494] ? rpc_call_sync+0x1a0/0x1a0 [ 74.714725][ T8494] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 74.720956][ T8494] ? xprt_create_transport+0xd6/0x7d0 [ 74.726315][ T8494] rpc_create+0x354/0x670 [ 74.730638][ T8494] ? rpc_create_xprt+0x4a0/0x4a0 [ 74.735569][ T8494] ? __lock_acquire+0xbdc/0x54b0 [ 74.740524][ T8494] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 74.746488][ T8494] ? lockdep_hardirqs_on_prepare+0x420/0x420 [ 74.752473][ T8494] nfs_create_rpc_client+0x4eb/0x680 [ 74.757873][ T8494] ? nfs_mark_client_ready+0x50/0x50 [ 74.763154][ T8494] ? do_raw_spin_lock+0x120/0x2b0 [ 74.768174][ T8494] nfs_init_client+0x6d/0x100 [ 74.773709][ T8494] nfs_get_client+0xcd7/0x1020 [ 74.778459][ T8494] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.784524][ T8494] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.790785][ T8494] nfs_init_server.isra.0+0x2c0/0xed0 [ 74.796176][ T8494] ? nfs_get_client+0x1020/0x1020 [ 74.801230][ T8494] ? unpoison_range+0x2c/0x50 [ 74.805929][ T8494] ? ____kasan_kmalloc.constprop.0+0xa0/0xd0 [ 74.811937][ T8494] nfs_create_server+0x18f/0x650 [ 74.817096][ T8494] nfs_try_get_tree+0x181/0x9f0 [ 74.821942][ T8494] ? find_held_lock+0x2d/0x110 [ 74.826716][ T8494] ? nfs_get_tree_common+0x1380/0x1380 [ 74.832161][ T8494] ? get_nfs_version+0xc7/0x2f0 [ 74.837173][ T8494] ? lock_downgrade+0x6d0/0x6d0 [ 74.842011][ T8494] ? do_raw_spin_lock+0x120/0x2b0 [ 74.847024][ T8494] ? rwlock_bug.part.0+0x90/0x90 [ 74.852120][ T8494] ? nfs_get_tree+0x806/0x1520 [ 74.856875][ T8494] ? rcu_read_lock_sched_held+0x3a/0x70 [ 74.862412][ T8494] ? do_raw_spin_unlock+0x171/0x230 [ 74.867618][ T8494] nfs_get_tree+0xaa1/0x1520 [ 74.872495][ T8494] vfs_get_tree+0x89/0x2f0 [ 74.876918][ T8494] path_mount+0x12ae/0x1e70 [ 74.881413][ T8494] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.888771][ T8494] ? strncpy_from_user+0x2a0/0x3e0 [ 74.893888][ T8494] ? finish_automount+0xb20/0xb20 [ 74.899108][ T8494] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.905352][ T8494] ? getname_flags.part.0+0x1dd/0x4f0 [ 74.910742][ T8494] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 74.917095][ T8494] __x64_sys_mount+0x27f/0x300 [ 74.921972][ T8494] ? copy_mnt_ns+0xae0/0xae0 [ 74.926561][ T8494] ? syscall_enter_from_user_mode+0x1d/0x50 [ 74.932453][ T8494] do_syscall_64+0x2d/0x70 [ 74.936882][ T8494] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.942773][ T8494] RIP: 0033:0x440419 [ 74.946658][ T8494] 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 [ 74.966270][ T8494] RSP: 002b:00007ffe282dde28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 74.974691][ T8494] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440419 [ 74.982676][ T8494] RDX: 0000000020fb5ffc RSI: 0000000020343ff8 RDI: 0000000020000100 [ 74.990779][ T8494] RBP: 00000000006ca018 R08: 000000002000a000 R09: 0000000000000000 [ 74.998764][ T8494] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401c20 [ 75.006724][ T8494] R13: 0000000000401cb0 R14: 0000000000000000 R15: 0000000000000000 [ 75.015617][ T8494] Kernel Offset: disabled [ 75.020290][ T8494] Rebooting in 86400 seconds..