[ OK ] Started OpenBSD Secure Shell server. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 114.193979][ T8461] ===================================================== [ 114.200943][ T8461] BUG: KMSAN: uninit-value in sha512_generic_block_fn+0x222a/0x2ac0 [ 114.208911][ T8461] CPU: 0 PID: 8461 Comm: syz-executor774 Not tainted 5.8.0-rc5-syzkaller #0 [ 114.217554][ T8461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.227582][ T8461] Call Trace: [ 114.230864][ T8461] dump_stack+0x1df/0x240 [ 114.235187][ T8461] kmsan_report+0xf7/0x1e0 [ 114.239577][ T8461] __msan_warning+0x58/0xa0 [ 114.244057][ T8461] sha512_generic_block_fn+0x222a/0x2ac0 [ 114.249666][ T8461] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 114.255713][ T8461] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 114.261761][ T8461] ? __module_address+0x68/0x600 [ 114.266677][ T8461] ? is_module_text_address+0x4d/0x2a0 [ 114.272114][ T8461] ? __kernel_text_address+0x171/0x2d0 [ 114.277554][ T8461] ? unwind_get_return_address+0x8c/0x130 [ 114.283248][ T8461] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 114.289288][ T8461] ? kmsan_get_metadata+0x11d/0x180 [ 114.294464][ T8461] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 114.300246][ T8461] crypto_sha512_finup+0x538/0x5b0 [ 114.305335][ T8461] ? sha512_generic_block_fn+0x2ac0/0x2ac0 [ 114.311116][ T8461] crypto_shash_finup+0x2b4/0x6b0 [ 114.316117][ T8461] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 114.322171][ T8461] ? sha384_base_init+0x18a/0x220 [ 114.327182][ T8461] shash_digest_unaligned+0x22b/0x260 [ 114.332541][ T8461] ? crypto_shash_digest+0x3d0/0x3d0 [ 114.337805][ T8461] shash_ahash_digest+0x788/0x8a0 [ 114.342869][ T8461] shash_async_digest+0xbb/0x110 [ 114.347785][ T8461] crypto_ahash_op+0x1c6/0x6c0 [ 114.352529][ T8461] ? __kmalloc+0x115/0x460 [ 114.356920][ T8461] ? kmsan_get_metadata+0x11d/0x180 [ 114.362089][ T8461] ? kmsan_get_metadata+0x11d/0x180 [ 114.367264][ T8461] ? shash_async_finup+0x110/0x110 [ 114.372366][ T8461] ? shash_async_finup+0x110/0x110 [ 114.377451][ T8461] crypto_ahash_digest+0xdc/0x150 [ 114.382447][ T8461] hash_sendpage+0x9cc/0xdf0 [ 114.387015][ T8461] ? hash_recvmsg+0xd30/0xd30 [ 114.391670][ T8461] sock_sendpage+0x1e1/0x2c0 [ 114.396241][ T8461] pipe_to_sendpage+0x38c/0x4c0 [ 114.401066][ T8461] ? sock_fasync+0x250/0x250 [ 114.405639][ T8461] __splice_from_pipe+0x565/0xf00 [ 114.410636][ T8461] ? generic_splice_sendpage+0x2d0/0x2d0 [ 114.416256][ T8461] generic_splice_sendpage+0x1d5/0x2d0 [ 114.421694][ T8461] ? iter_file_splice_write+0x1800/0x1800 [ 114.427386][ T8461] direct_splice_actor+0x1fd/0x580 [ 114.432475][ T8461] ? kmsan_get_metadata+0x4f/0x180 [ 114.437561][ T8461] splice_direct_to_actor+0x6b2/0xf50 [ 114.442906][ T8461] ? do_splice_direct+0x580/0x580 [ 114.447911][ T8461] do_splice_direct+0x342/0x580 [ 114.452745][ T8461] do_sendfile+0x101b/0x1d40 [ 114.457318][ T8461] __se_sys_sendfile64+0x2bb/0x360 [ 114.462402][ T8461] ? kmsan_get_metadata+0x4f/0x180 [ 114.467488][ T8461] __x64_sys_sendfile64+0x56/0x70 [ 114.472488][ T8461] do_syscall_64+0xb0/0x150 [ 114.476968][ T8461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 114.482832][ T8461] RIP: 0033:0x4403c9 [ 114.486703][ T8461] Code: Bad RIP value. [ 114.490746][ T8461] RSP: 002b:00007ffd4da61a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 114.499134][ T8461] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403c9 [ 114.507085][ T8461] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 [ 114.515035][ T8461] RBP: 00000000006ca018 R08: 65732f636f72702f R09: 65732f636f72702f [ 114.522990][ T8461] R10: 0000000000000a3d R11: 0000000000000246 R12: 0000000000401c30 [ 114.530938][ T8461] R13: 0000000000401cc0 R14: 0000000000000000 R15: 0000000000000000 [ 114.538889][ T8461] [ 114.541189][ T8461] Uninit was created at: [ 114.545407][ T8461] kmsan_save_stack_with_flags+0x3c/0x90 [ 114.551012][ T8461] kmsan_alloc_page+0xb9/0x180 [ 114.555744][ T8461] __alloc_pages_nodemask+0x56a2/0x5dc0 [ 114.561259][ T8461] alloc_pages_current+0x672/0x990 [ 114.566339][ T8461] push_pipe+0x605/0xb70 [ 114.570552][ T8461] iov_iter_get_pages_alloc+0x18a9/0x21c0 [ 114.576241][ T8461] do_splice_to+0x4fc/0x14f0 [ 114.580804][ T8461] splice_direct_to_actor+0x45c/0xf50 [ 114.586147][ T8461] do_splice_direct+0x342/0x580 [ 114.590967][ T8461] do_sendfile+0x101b/0x1d40 [ 114.595525][ T8461] __se_sys_sendfile64+0x2bb/0x360 [ 114.600604][ T8461] __x64_sys_sendfile64+0x56/0x70 [ 114.605598][ T8461] do_syscall_64+0xb0/0x150 [ 114.610072][ T8461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 114.615928][ T8461] ===================================================== [ 114.622826][ T8461] Disabling lock debugging due to kernel taint [ 114.628948][ T8461] Kernel panic - not syncing: panic_on_warn set ... [ 114.635508][ T8461] CPU: 0 PID: 8461 Comm: syz-executor774 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 114.645564][ T8461] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.655620][ T8461] Call Trace: [ 114.658885][ T8461] dump_stack+0x1df/0x240 [ 114.663190][ T8461] panic+0x3d5/0xc3e [ 114.667074][ T8461] kmsan_report+0x1df/0x1e0 [ 114.671552][ T8461] __msan_warning+0x58/0xa0 [ 114.676033][ T8461] sha512_generic_block_fn+0x222a/0x2ac0 [ 114.681675][ T8461] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 114.687718][ T8461] ? __msan_metadata_ptr_for_load_8+0x10/0x20 [ 114.693778][ T8461] ? __module_address+0x68/0x600 [ 114.698694][ T8461] ? is_module_text_address+0x4d/0x2a0 [ 114.705084][ T8461] ? __kernel_text_address+0x171/0x2d0 [ 114.710516][ T8461] ? unwind_get_return_address+0x8c/0x130 [ 114.716211][ T8461] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 114.722249][ T8461] ? kmsan_get_metadata+0x11d/0x180 [ 114.727433][ T8461] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 114.733214][ T8461] crypto_sha512_finup+0x538/0x5b0 [ 114.738304][ T8461] ? sha512_generic_block_fn+0x2ac0/0x2ac0 [ 114.744083][ T8461] crypto_shash_finup+0x2b4/0x6b0 [ 114.749085][ T8461] ? kmsan_internal_unpoison_shadow+0x2f/0x40 [ 114.755127][ T8461] ? sha384_base_init+0x18a/0x220 [ 114.760137][ T8461] shash_digest_unaligned+0x22b/0x260 [ 114.765485][ T8461] ? crypto_shash_digest+0x3d0/0x3d0 [ 114.770754][ T8461] shash_ahash_digest+0x788/0x8a0 [ 114.775758][ T8461] shash_async_digest+0xbb/0x110 [ 114.780679][ T8461] crypto_ahash_op+0x1c6/0x6c0 [ 114.785416][ T8461] ? __kmalloc+0x115/0x460 [ 114.789808][ T8461] ? kmsan_get_metadata+0x11d/0x180 [ 114.795674][ T8461] ? kmsan_get_metadata+0x11d/0x180 [ 114.800844][ T8461] ? shash_async_finup+0x110/0x110 [ 114.806657][ T8461] ? shash_async_finup+0x110/0x110 [ 114.811755][ T8461] crypto_ahash_digest+0xdc/0x150 [ 114.816756][ T8461] hash_sendpage+0x9cc/0xdf0 [ 114.821325][ T8461] ? hash_recvmsg+0xd30/0xd30 [ 114.825978][ T8461] sock_sendpage+0x1e1/0x2c0 [ 114.830548][ T8461] pipe_to_sendpage+0x38c/0x4c0 [ 114.835371][ T8461] ? sock_fasync+0x250/0x250 [ 114.839939][ T8461] __splice_from_pipe+0x565/0xf00 [ 114.844938][ T8461] ? generic_splice_sendpage+0x2d0/0x2d0 [ 114.850552][ T8461] generic_splice_sendpage+0x1d5/0x2d0 [ 114.855989][ T8461] ? iter_file_splice_write+0x1800/0x1800 [ 114.861687][ T8461] direct_splice_actor+0x1fd/0x580 [ 114.866781][ T8461] ? kmsan_get_metadata+0x4f/0x180 [ 114.871868][ T8461] splice_direct_to_actor+0x6b2/0xf50 [ 114.877210][ T8461] ? do_splice_direct+0x580/0x580 [ 114.882215][ T8461] do_splice_direct+0x342/0x580 [ 114.887054][ T8461] do_sendfile+0x101b/0x1d40 [ 114.891627][ T8461] __se_sys_sendfile64+0x2bb/0x360 [ 114.896711][ T8461] ? kmsan_get_metadata+0x4f/0x180 [ 114.901799][ T8461] __x64_sys_sendfile64+0x56/0x70 [ 114.906798][ T8461] do_syscall_64+0xb0/0x150 [ 114.911275][ T8461] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 114.917142][ T8461] RIP: 0033:0x4403c9 [ 114.921006][ T8461] Code: Bad RIP value. [ 114.925046][ T8461] RSP: 002b:00007ffd4da61a28 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 114.933431][ T8461] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403c9 [ 114.941374][ T8461] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000005 [ 114.949324][ T8461] RBP: 00000000006ca018 R08: 65732f636f72702f R09: 65732f636f72702f [ 114.957270][ T8461] R10: 0000000000000a3d R11: 0000000000000246 R12: 0000000000401c30 [ 114.965214][ T8461] R13: 0000000000401cc0 R14: 0000000000000000 R15: 0000000000000000 [ 114.974489][ T8461] Kernel Offset: 0xf000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 114.986030][ T8461] Rebooting in 86400 seconds..