[ 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 '10.128.0.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 118.136412][ T8447] ===================================================== [ 118.143376][ T8447] BUG: KMSAN: uninit-value in crc32_le_base+0x4d2/0xd10 [ 118.150309][ T8447] CPU: 1 PID: 8447 Comm: syz-executor214 Not tainted 5.8.0-rc5-syzkaller #0 [ 118.159565][ T8447] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.169598][ T8447] Call Trace: [ 118.172869][ T8447] dump_stack+0x1df/0x240 [ 118.177187][ T8447] kmsan_report+0xf7/0x1e0 [ 118.181583][ T8447] __msan_warning+0x58/0xa0 [ 118.186071][ T8447] crc32_le_base+0x4d2/0xd10 [ 118.190636][ T8447] ? unwind_get_return_address+0x8c/0x130 [ 118.196334][ T8447] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 118.202387][ T8447] ? arch_stack_walk+0x2a2/0x3e0 [ 118.207304][ T8447] crc32_update+0xb2/0x110 [ 118.211694][ T8447] ? crc32_init+0xd0/0xd0 [ 118.216015][ T8447] crypto_shash_update+0x4e9/0x550 [ 118.221104][ T8447] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 118.227236][ T8447] ? crypto_hash_walk_first+0x1fd/0x360 [ 118.232753][ T8447] ? kmsan_get_metadata+0x4f/0x180 [ 118.237841][ T8447] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 118.243620][ T8447] shash_async_update+0x113/0x1d0 [ 118.248620][ T8447] ? shash_async_init+0x1e0/0x1e0 [ 118.253640][ T8447] hash_sendpage+0x8ef/0xdf0 [ 118.258232][ T8447] ? hash_recvmsg+0xd30/0xd30 [ 118.262900][ T8447] sock_sendpage+0x1e1/0x2c0 [ 118.267629][ T8447] pipe_to_sendpage+0x38c/0x4c0 [ 118.272455][ T8447] ? sock_fasync+0x250/0x250 [ 118.277032][ T8447] __splice_from_pipe+0x565/0xf00 [ 118.282033][ T8447] ? generic_splice_sendpage+0x2d0/0x2d0 [ 118.287646][ T8447] generic_splice_sendpage+0x1d5/0x2d0 [ 118.293124][ T8447] ? iter_file_splice_write+0x1800/0x1800 [ 118.298836][ T8447] direct_splice_actor+0x1fd/0x580 [ 118.303926][ T8447] ? kmsan_get_metadata+0x4f/0x180 [ 118.309054][ T8447] splice_direct_to_actor+0x6b2/0xf50 [ 118.316572][ T8447] ? do_splice_direct+0x580/0x580 [ 118.321595][ T8447] do_splice_direct+0x342/0x580 [ 118.326441][ T8447] do_sendfile+0x101b/0x1d40 [ 118.331030][ T8447] __se_sys_sendfile64+0x2bb/0x360 [ 118.336141][ T8447] ? kmsan_get_metadata+0x4f/0x180 [ 118.341232][ T8447] __x64_sys_sendfile64+0x56/0x70 [ 118.346236][ T8447] do_syscall_64+0xb0/0x150 [ 118.350720][ T8447] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 118.356588][ T8447] RIP: 0033:0x4403d9 [ 118.360566][ T8447] Code: Bad RIP value. [ 118.364607][ T8447] RSP: 002b:00007fff5a2e7f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 118.372989][ T8447] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403d9 [ 118.380933][ T8447] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 118.388877][ T8447] RBP: 00000000006ca018 R08: 0000000000000019 R09: 65732f636f72702f [ 118.396826][ T8447] R10: 001000007ffff000 R11: 0000000000000246 R12: 0000000000401c40 [ 118.404772][ T8447] R13: 0000000000401cd0 R14: 0000000000000000 R15: 0000000000000000 [ 118.412722][ T8447] [ 118.415037][ T8447] Uninit was created at: [ 118.419256][ T8447] kmsan_save_stack_with_flags+0x3c/0x90 [ 118.424872][ T8447] kmsan_alloc_page+0xb9/0x180 [ 118.429608][ T8447] __alloc_pages_nodemask+0x56a2/0x5dc0 [ 118.435126][ T8447] alloc_pages_current+0x672/0x990 [ 118.440207][ T8447] push_pipe+0x605/0xb70 [ 118.444422][ T8447] iov_iter_get_pages_alloc+0x18a9/0x21c0 [ 118.450116][ T8447] do_splice_to+0x4fc/0x14f0 [ 118.454677][ T8447] splice_direct_to_actor+0x45c/0xf50 [ 118.460023][ T8447] do_splice_direct+0x342/0x580 [ 118.464853][ T8447] do_sendfile+0x101b/0x1d40 [ 118.469414][ T8447] __se_sys_sendfile64+0x2bb/0x360 [ 118.474499][ T8447] __x64_sys_sendfile64+0x56/0x70 [ 118.479519][ T8447] do_syscall_64+0xb0/0x150 [ 118.483998][ T8447] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 118.490463][ T8447] ===================================================== [ 118.497378][ T8447] Disabling lock debugging due to kernel taint [ 118.503513][ T8447] Kernel panic - not syncing: panic_on_warn set ... [ 118.510074][ T8447] CPU: 1 PID: 8447 Comm: syz-executor214 Tainted: G B 5.8.0-rc5-syzkaller #0 [ 118.520101][ T8447] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.530138][ T8447] Call Trace: [ 118.534101][ T8447] dump_stack+0x1df/0x240 [ 118.538421][ T8447] panic+0x3d5/0xc3e [ 118.542304][ T8447] kmsan_report+0x1df/0x1e0 [ 118.546786][ T8447] __msan_warning+0x58/0xa0 [ 118.551271][ T8447] crc32_le_base+0x4d2/0xd10 [ 118.555851][ T8447] ? unwind_get_return_address+0x8c/0x130 [ 118.561544][ T8447] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 118.567586][ T8447] ? arch_stack_walk+0x2a2/0x3e0 [ 118.572503][ T8447] crc32_update+0xb2/0x110 [ 118.576892][ T8447] ? crc32_init+0xd0/0xd0 [ 118.581195][ T8447] crypto_shash_update+0x4e9/0x550 [ 118.586279][ T8447] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 118.592414][ T8447] ? crypto_hash_walk_first+0x1fd/0x360 [ 118.597944][ T8447] ? kmsan_get_metadata+0x4f/0x180 [ 118.603030][ T8447] ? kmsan_get_shadow_origin_ptr+0x81/0xb0 [ 118.608808][ T8447] shash_async_update+0x113/0x1d0 [ 118.613810][ T8447] ? shash_async_init+0x1e0/0x1e0 [ 118.618810][ T8447] hash_sendpage+0x8ef/0xdf0 [ 118.623394][ T8447] ? hash_recvmsg+0xd30/0xd30 [ 118.628058][ T8447] sock_sendpage+0x1e1/0x2c0 [ 118.632626][ T8447] pipe_to_sendpage+0x38c/0x4c0 [ 118.637455][ T8447] ? sock_fasync+0x250/0x250 [ 118.642025][ T8447] __splice_from_pipe+0x565/0xf00 [ 118.647023][ T8447] ? generic_splice_sendpage+0x2d0/0x2d0 [ 118.652639][ T8447] generic_splice_sendpage+0x1d5/0x2d0 [ 118.658173][ T8447] ? iter_file_splice_write+0x1800/0x1800 [ 118.663866][ T8447] direct_splice_actor+0x1fd/0x580 [ 118.669059][ T8447] ? kmsan_get_metadata+0x4f/0x180 [ 118.674161][ T8447] splice_direct_to_actor+0x6b2/0xf50 [ 118.679516][ T8447] ? do_splice_direct+0x580/0x580 [ 118.684525][ T8447] do_splice_direct+0x342/0x580 [ 118.689357][ T8447] do_sendfile+0x101b/0x1d40 [ 118.693931][ T8447] __se_sys_sendfile64+0x2bb/0x360 [ 118.699033][ T8447] ? kmsan_get_metadata+0x4f/0x180 [ 118.704123][ T8447] __x64_sys_sendfile64+0x56/0x70 [ 118.709137][ T8447] do_syscall_64+0xb0/0x150 [ 118.713620][ T8447] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 118.719498][ T8447] RIP: 0033:0x4403d9 [ 118.723364][ T8447] Code: Bad RIP value. [ 118.727413][ T8447] RSP: 002b:00007fff5a2e7f88 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 118.735811][ T8447] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403d9 [ 118.743755][ T8447] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 118.751701][ T8447] RBP: 00000000006ca018 R08: 0000000000000019 R09: 65732f636f72702f [ 118.759744][ T8447] R10: 001000007ffff000 R11: 0000000000000246 R12: 0000000000401c40 [ 118.767690][ T8447] R13: 0000000000401cd0 R14: 0000000000000000 R15: 0000000000000000 [ 118.776895][ T8447] Kernel Offset: 0x27600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 118.788780][ T8447] Rebooting in 86400 seconds..